Taher Abu lebdeh | North Carolina Agricultural and Technical State University (original) (raw)

Papers by Taher Abu lebdeh

American Journal of Engineering and Applied Sciences, 2021

Powder packing is a very important aspect of additive manufacturing (3-D printing), as it directl... more Powder packing is a very important aspect of additive manufacturing (3-D printing), as it directly impacts the final physical and mechanical properties of the printed objects. Improving the packing density of powder directly impacts the microstructure of the finished 3D-printed product, which also contributes to the surface finish. In order to achieve the densest packing for a powder, different sizes of that powder must be mixed together in such a way that we minimize the voids, thereby increasing the density of the powder. To achieve this, a model that predicts the volume fraction of each powder grade becomes necessary to predict the maximum possible powder density. A wide variety of models have been developed for packing density which can be classified as: Binary Mixture Models, Ternary Mixture Models and Multi-Component Mixture Models. In this project, the Furnas ternary model and the modified Toufar binary model were used to evaluate the packing density of Boron powder. Two sets of Boron powders were used for the analysis: First set: d10 = 75 µm, d50 = 90 µm, d90 = 106 µm and the second set: d10 = 3.11 µm, d50 = 14.0 µm, d90 = 30.2 µm. The three different sizes of each powder were randomly mixed to obtain the maximum packing density and compared with the theoretical packing density obtained by Furnas ternary model. The three sizes were then reduced to two sizes to obtain the packing density and compare the result with the modified Toufar binary model. Different mix rations were performed to evaluate the results obtained from both Furnas model and modified Toufar model. Results indicated that the models accurately predicted the maximum density of metal powder. Packing density obtained experimentally was 1.73 g/cm 3 at a mix ratio (coarse: Fine) of 89:11, while the values obtained by Furnas model and modified Toufar were 1.72 at 87:13 mix and 1.73 g/cm 3 at 89:11 mix respectively.

Energy Research Journal, 2018

Hydrogen is the best friend of man and the environment. Actually, it is the core element from tha... more Hydrogen is the best friend of man and the environment. Actually, it is the core element from that can extract energy, at infinity, in various forms. Until now has not been sufficiently exploited, but once with the evolution of the human species is the time to start to pool all types of energy which the hydrogen and its isotopes may donate them to us. Obviously the most abundant are nuclear energies which may be extracted from the hydrogen, either by well-known reaction of fission or through the much-desired fusion. In the reaction of a merger Deuterium-Tritium, for example, the energy required to overcome the Coulomb barrier is 0.1 MeV. Conversion between the energy and the temperature shows that the barrier of 0.1 MeV would be exceeded at a temperature of over 1.2 billion Kelvin degrees. According to the static calculations required a temperature of fusion to warm temperature is about 4 billion degrees. There is already an increase of almost four times than the latest calculations indicated by specialists. But calculating using radius determined dynamically, when the energy required is much higher, we come to a temperature necessary for the attainment of the thermonuclear fusion reaction of 40 trillion degrees, as for any 1 keV is needed about 10 million degrees temperature. Hot temperatures the merger being elusive, scientists have thought of achieving cold fusion.

American Journal of Engineering and Applied Sciences, 2018

The cross-machine has frequent uses in mechanical assemblies, automation, robotics and mechanisms... more The cross-machine has frequent uses in mechanical assemblies, automation, robotics and mechanisms with various uses. In the present paper we want to present this type of mechanism with its main, geometric, cinematic, strengths and propose its study in its possible use as an internal combustion engine. In this novelty, the mechanism will have two types of operation, one when operated from the crank (a compressor operation) and another when actuated from the piston (a motor operation). The forces will be presented along with their distribution (how the forces are distributed from one element to the other) in both modes of operation, compressor and engine.

American Journal of Engineering and Applied Sciences, 2018

This study evaluates the effectiveness of using a Bio-modified Nanoclay additive (BNC) to reduce ... more This study evaluates the effectiveness of using a Bio-modified Nanoclay additive (BNC) to reduce the oxidative aging of asphalt pavements. The study results through X-Ray Diffraction analysis showed that the modification of montmorillonite clay with bio-modifier increased the basal d-spacing of clay. The resulting nanoclay with increased interlayer spacing was chosen for application in asphalt binder. Rheological characterization of clay-modified asphalt binder were studied before and after oxidation aging. The effects of BNC on asphalt complex modulus were observed to be prevailing in the intermediate to high-temperature range. The aging resistance of asphalt binder showed improvement with the addition of nanoclay and the improvement was more notable in presence of bio modified-nanoclay than pure clay.

American Journal of Engineering and Applied Sciences, 2018

Properties such as durability and moisture resistance of asphalt concrete significantly improve p... more Properties such as durability and moisture resistance of asphalt concrete significantly improve pavement service life. When siliceous aggregate is used, then preventing moisture damage and stripping become distinctly required. Typically, stripping could be prevented by either using antistripping agents or by modifying the binders. The anti-stripping agent achieve its purpose by changing the aggregates' affinity for water through changing the zeta potential (promote bitumen adsorption due to negative surface charge). On the other hand, modifications of binders promote interface bonding between aggregate particles and bitumen. However, the process of applying anti-stripping agents or adhesion promoters is typically costly and, in some cases, may negatively impact other performance characteristics of pavement. Accordingly, this paper examines the merit of applying natural bitumen (gilsonite) instead of typically used anti-stripping chemicals in order to both promote resistance to moisture damage and reduce construction cost in asphalt. In addition to being quite low-cost, Gilsonite has a chemical composition nearly similar to that of petroleum based asphalt which makes it very compatible with asphalt binder.

American Journal of Engineering and Applied Sciences, 2018

A mechanism with an oscillating slider is a mechanism quite often used in the technique. It has s... more A mechanism with an oscillating slider is a mechanism quite often used in the technique. It has some advantages over other similar mechanisms being able to work with accelerations and reduced forces under the same conditions with another similar mechanism. For example, an internal combustion engine could be built more efficiently with this mechanism, resulting in a motor that would successfully replace Otto's classic one. In the paper, the kinematics, forces and their distribution will be presented within such a mechanism.

Proceedings of International Structural Engineering and Construction, 2016

This study investigated the compressive strength of hardened cement paste and the formation of ca... more This study investigated the compressive strength of hardened cement paste and the formation of calcium silicate hydrate (C-S-H) with the addition of nano silica (SiO2). Through this search, the development of the concretes strength was determined to better understand the process of cement hydration. Compressive strength testing was performed using MTS and Forney testing machines to determine stress-strain curves and elastic modulus of materials. The hydration process and formation of C-S-H and calcium hydroxide (CH) was examined using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). This study also incorporates the use of vacuum curing, in comparison to that of the traditional water curing method. Results indicate an increase in compressive strength using 1%, 3% and 5% of nano silica to cement replacement by volume in comparison to the control mix (without nano silica). The optimum cement replacement to yield maximum strength was of the 1% nano ...

American Journal of Engineering and Applied Sciences, 2018

The main idea is that, as the forests of the planet are getting smaller, too much wood is cut and... more The main idea is that, as the forests of the planet are getting smaller, too much wood is cut and the forests are made too slow, there are also large forest fires due to excessive heat, of people arguing with the law, or simply by chance. Extinguishing fires are generally difficult, interventions being difficult anyway due to the increased fire, the heavy access of the firefighters to the forest, the wind that often attacks the fire and especially due to the late intervention of the specialized firefighters. A first aid could come from finding out the moment when such a fire broke out and instantly signaling it with modern wireless systems. Today, the planet's best surveillance system is the one made with artificial geostationary satellites, which instantly signals the outbreak of the fire. The system set up by NASA is indeed the most efficient possible. Find out quickly by the outbreak of fire the chances for him to be controlled quickly grow very much. NASA's satellite tools are often the first to detect fires that are burning in distant regions and new fire locations are sent directly to field managers around the world in a few hours of satellite travel. Together, NASA's tools, including a number built and run by the JAS NASA lab in Pasadena, California, have detected fire-fighting actions by tracking fires by providing information on fire management and stair scaling in scar scars. NASA has a fleet of earth observation tools, many of which contribute to our understanding of the Earth's fire. Satellites in orbit around the poles provide observations of the entire planet several times a day, while satellites in geostationary orbit offer rough resolution images of fire, smoke and clouds every five to fifteen minutes. "NASA's satellite, land and space survey captures the total impact of the fire on the Earth, from early detection of smoke and ecosystems to decades after the fire," said Doug Morton, a researcher at Greenbelt, Maryland. Much of the remote sensing data that NASA collects for fires is quickly available to help disaster response efforts around the world. The NASA earthquake program supports this application science and mobilizes for high-risk global events that cover a range of natural hazards-not only fires, but also earthquakes, tsunamis, floods, landslides, severe weather, winter, tropical cyclones and volcanoes. In this study we want to propose the future use of robots instead of humans for such dangerous fire-fighting interventions in a forest in flame. Robotic and automated vehicles may be prepared to take over this difficult task for man, extinguishing such a fire making it simpler and less dangerous for humans.

American Journal of Engineering and Applied Sciences, 2018

If you can live on Mars, or if there was life on this planet, it's a natural question. The popula... more If you can live on Mars, or if there was life on this planet, it's a natural question. The population of our planet has far outstripped the boundaries from which the planet begins to overcrow. Global resources are decreasing, while their consumption is rising more and more. The world's population is growing, it needs housing, food, water, air, clothes, transport, energy and the possibilities offered by our planet are getting smaller. Because we have long been behind the "conquering space" chapter, we are now seriously thinking about limiting the existing resources for the current and future population and those who are looking for extensions on water or in desert areas. In order to conquer the cosmic space with the current technologies, it is necessary a very large financial, sustained financial effort, but unfortunately, it is not at the level of necessity. Under these circumstances, it is natural to wonder whether there is a possibility of living on Mars, which is a subject of particular interest for astrobiology due to the proximity of the planet and its similarities to the Earth. So far, no concrete evidence of past or present life has been found on Mars, but the evidence now shows clearly that during the Noachian Ancient Period, Mars' surface environment had liquid water and could be useful to microorganisms. Surely the existence of living conditions does not necessarily imply the presence of life. ExoMars (Mars Exobiology) is a two-part astrobiology project to look for Martian life proofs, a joint mission of the European Space Agency (ESA) and the Rosice Rosice Space Agency. The first part of the project, launched in 2016, placed a research and communication satellite on Marte's orbit and launched a stationary experimental landing vehicle (which collapsed). The second part of the project is planned for 2020 when a rover will be launched and landed on the surface of Mars, sustaining a scientific mission that is expected to last until 2022 or even later. The major goals of ExoMars programs are to look for previous life signs on Mars, to investigate how martian waters and geochemical environments, atmospheric gas studies and their sources vary. It will search for old biosigns in Martian life, using several elements of spacecraft that will be sent to Mars in two launches. ExoMars Trace Gas Examiners (TGO) and a stationary testator named Schiaparelli were launched on March 14, 2016. TGO entered Mars orbit on October 19, 2016 and will continue to capture methane (CH 4) and other gas pathways present in the Martian Atmosphere that could be a proof of possible biological or geological activity.

Independent Journal of Management & Production, 2019

In other papers already presented on the structure and dimensions of elemental hydrogen, the elem... more In other papers already presented on the structure and dimensions of elemental hydrogen, the elementary particle dynamics was taken into account in order to be able to determine the size of the hydrogen. This new work, one comes back with a new dynamic hypothesis designed to fundamentally change again the dynamic particle size due to the impulse influence of the particle. Until now it has been assumed that the impulse of an elementary particle is equal to the mass of the particle multiplied by its velocity, but in reality, the impulse definition is different, which is derived from the translational kinetic energy in a rapport of its velocity. This produces an additional condensation of matter in its elemental form.

SSRN Electronic Journal, 2017

The development and diversification of machines and mechanisms with applications in all fields re... more The development and diversification of machines and mechanisms with applications in all fields require new scientific researches for the systematization and improvement of existing mechanical systems by creating new mechanisms adapted to modern requirements, which involve increasingly complex topological structures. The modern industry, the practice of designing and building machinery is increasingly based on the results of scientific and applied research. Each industrial achievement has backed theoretical and experimental computer-assisted research, which solves increasingly complex problems with advanced computing programs using an increasingly specialized software. The robotization of technological processes determines and influences the emergence of new industries, applications under special environmental conditions, the approach of new types of technological operations, manipulation of objects in the alien space, teleoperators in the top disciplines like medicine, robots covering a whole field greater service provision in our modern, computerized society. Movable, robotic, mechatronic mechanical systems have entered nearly all industrial spheres. Today, we can no longer conceive of industrial production without these extremely useful systems. They are still said to steal from people's jobs. Even so, it should be made clear that these systems create value, work in difficult, repetitive, nonpausing, high-quality work, without getting tired, without getting sick, without salary, and producing value who are paid and people left without jobs, so that they can work elsewhere in more pleasant, more advantageous conditions, with the necessary breaks. Before studying the trajectory of a tracer point, through the command laws in the active kinematic clutch space of the robot, the MPz configuration must be set in which the characteristic point occupies the initial and final positions. In the general case, the trajectory of the characteristic point of MPz is materialized by a curve in 3D geometric space, a curve that can be obtained by interpolation on specific portions, depending on the set points of precision. For the manipulation of an object between the initial and the final positions, the following work operations are required: grip (in the initial position), liftingdetachment (by the laying surface), displacement (to the final position, descent) and release (in the final position).

SSRN Electronic Journal, 2017

The development and diversification of machines and mechanisms with applications in all fields re... more The development and diversification of machines and mechanisms with applications in all fields require new scientific researches for the systematization and improvement of existing mechanical systems by creating new mechanisms adapted to modern requirements, which involve increasingly complex topological structures. The modern industry, the practice of designing and building machinery is increasingly based on the results of scientific and applied research. Each industrial achievement has backed theoretical and experimental computer-assisted research, which solves increasingly complex problems with advanced computing programs using an increasingly specialized software. The robotization of technological processes determines and influences the emergence of new industries, applications under special environmental conditions, the approach of new types of technological operations, manipulation of objects in the alien space, teleoperators in the top disciplines like medicine, robots covering a whole field greater service provision in our modern, computerized society. Movable, robotic, mechatronic mechanical systems have entered nearly all industrial spheres. Today, we can no longer conceive of industrial production without these extremely useful systems. They are still said to steal from people's jobs. Even so, it should be made clear that these systems create value, work in difficult, repetitive, non-pausing, high-quality work, without getting tired, without getting sick, without salary, and producing value who are paid and people left without jobs, so that they can work elsewhere in more pleasant, more advantageous conditions, with the necessary breaks. In other words, robots do not destroy people but help them in the process of work. Let us not remember the fact that in some environments people could not even work. In fact, the robot's profitability for work without stopping, repetitive, and qualitative, is no longer in question. In addition, there are many heavy operations that are absolutely necessary for the presence of robots. You can not create microchips with people directly without interposing the robot. Man can not directly work with objects of such small size. Neither difficult medical operations can be designed without robotic mechatronic systems. The most used robotic mechanical mechanical systems are the anthropomorphic ones in the class of serial systems. To this we have studied the direct kinematics in previous castings, and in this paper we are going to study the inverse kinematics.

Journal of Mechatronics and Robotics, 2018

Mechanical systems in motion type parallel structures are solid, fast and accurate. Between mobil... more Mechanical systems in motion type parallel structures are solid, fast and accurate. Between mobile systems parallel the best known and used system is that of a Stewart platforms, as being and the oldest system, quickly, solid and accurate. The paper presents a few main elements of the Stewart platforms. In the case where a motto element consists of a structure composed of two elements in a relative movement from the point of view of the train of propulsion and especially in the dynamic calculations, it is more convenient to represent the motto element as a single moving item. The paper presents an exact, original analytical geometry method for determining the kinematic and dynamic parameters of a parallel mobile structure. Compared with other methods already known, the presented method has the great advantage of being an exact analytical method of calculation and not one iterative-approximately.

American Journal of Engineering and Applied Sciences, 2017

This paper describes an application of industrial robots that gain ground mainly in the aerospace... more This paper describes an application of industrial robots that gain ground mainly in the aerospace industry. It is a TTT manipulator whose task is to automatically position the end-effector, in this case a complex sensor system and a eddy-current probe in the position set by the software application for testing by non-destructive ultrasound control of tickets and bars of titanium, both round and square, or any other transparent ultrasound metal (obviously in a certain range of sizes). For surface control, the effector also includes a Eddy current (Eddy current control system). The installation performs ultrasonic control by the echo boost method in total immersion using as a water coupling medium. This method provides the best coupling for automated control systems. This plant was specially produced for ZIROM S.A. A unique producer of titanium ingots in Romania by the reputed German company Karl Deutch (leader in this field), the founder of the company being also one of the inventors of the non-destructive ultrasonic control method, the part of Eddy current being produced by the German company Prüftechnik. This paper aims to explore the state of the art of non-destructive automatic ultrasonic control techniques according to the possible methods to be adopted, by the applications that demand such methods, by reviewing a series of installations more or less similar to those of Zirom s.a. It is thus found that there are a multitude of pine technical solutions that can be done with an ultrasonic automatic control and precision. In this context, the last chapter of the paper that attempts to probe the possible evolution of the future of US control in this field is of great importance because in the current pace of innovations in all fields, but especially in IT and electronics, the future holds many surprises.

American Journal of Engineering and Applied Sciences, 2014

A laboratory study was conducted to investigate the effects of Amine based modifier on rheologica... more A laboratory study was conducted to investigate the effects of Amine based modifier on rheological characteristics of particle filled viscous medium such as asphalt binder in presence of Recycled Asphalt Shingles (RAS). In this study, virgin asphalt binder (PG 64-22), three different percentages (20, 30 and 40%) of tear-off shingles and modifiers; Rediset, Evotherm and Bio-binder were used. The tear-off shingles acquired from local reroofing company in Greensboro, North Carolina; were finely grinded (85% passing of sieve # 200). The virgin binder and different percentages of RAS were then blended at 180°C using shearing speed of 400 rpm. Following that themixture was blended with 1.5% of Rediset, 0.5% of Evotherm and 5% of bio-binder. The properties of the blended binder were studied using the Rotational Viscometer (RV) equipped with two different spindle types:-One was Smooth Cylindrical spindle (SC4-27D) and the other one was Vane spindle (V 73). The analysis showed that the viscosity was increased with increasing the RAS percentage. Furthermore, the viscosity measured by vane spindle was continuously higher than the value measured by smooth spindle; however the difference between the two measurements reduced as the blending were improved using modifiers. Moreover, temperature found to be the main contributor to reduction of the viscosity in both spindles cases. In addition the coefficient of variation was significantly lower in the case of vane spindle, indicating that the vane spindle could be more appropriate in measuring viscosity of particle filled viscous medium such as RAS asphalt. Based on the experimental result an empirical index called blending index was introduced in this study to measure the blending behavior and status for modified mixtures. As expected it was found that the blending index increases as the temperature and rotational speed increases. In other word, higher temperature and shearing rate could enhance blending resulting in higher blending index. The blending index was further used as a laboratory measure to compare effectiveness of various additives in enhancing blending of RAS modified mixtures. It was shown that among three modifiers used in this study, the bio-binder was more effective to increase the blending index.

American Journal of Engineering and Applied Sciences, 2017

Concrete strength improved substantially when lateral confinement stresses are provided. This eff... more Concrete strength improved substantially when lateral confinement stresses are provided. This effect has been exploited in this study in composite beams at the concrete compression zone. New type of confinement is used in this research. The confinement of concrete in the compression zone is accomplished by providing U-links and stud-plate systems. The U-links are steel bars in the shape of the letter U welded internally in a steel tube at the compression concrete zone. These tubes provide confinement effect similar to the stirrups used in reinforced concrete beams. The stud-plate element used in this study is made of steel bar welded to a horizontal plate at one of its end, while the other end is welded to the top of the steel tube at the compression zone from the inside of the tube. The main function of these two elements is to provide the concrete in the compression zone with confinement stresses. The composite beam is tested in bending under single load at the mid-span. The effect of the new confinement system is studied and compared with concrete filled tube without any confinement element. The failure mechanism is also a focus of this research along with the deflection at the mid-span of the beam. The effect of the new confinement system on the structural behavior of the composite beam is presented.

American Journal of Engineering and Applied Sciences, 2016

A numerical model was derived to obtain results for two alloys during the Gas Atomization (GA) me... more A numerical model was derived to obtain results for two alloys during the Gas Atomization (GA) method. The model equations and governing equations were implemented through the application of part I data. Aspects such as heat transfer, fluid mechanics, thermodynamics and law of motions were taken into account for the formulation of equations that take gas dynamics, droplet dynamics and energy balance or conservation into consideration. The inputs of the model include: Processing parameters such as the size of the droplets, characteristics of the metal alloy, initial temperature of the molten metal, properties and fractions of the atomization gas and the gas pressure. The outputs include velocity and thermal profiles of the droplet and gas. Velocity profiles illustrate the velocity of both droplet and gas, while thermal profiles illustrate cooling rate and the rate of temperature change of the droplets. The alloys are gamma-Titanium Aluminide (γ-TiAl) and Al-3003-O. These alloys were selected due to the vast amount of applications both can have in several industries. Certain processing parameters were held constant, while others were altered. The main focus of this study was to gain insight into which optimal parameters should be utilized within the GA method for these alloys and to provide insight into the behavior of these alloys.

American Journal of Engineering and Applied Sciences, 2016

This research work investigates the effect of fly ash and silica fume on cement paste hydration. ... more This research work investigates the effect of fly ash and silica fume on cement paste hydration. Percentages of each additive were selected to replace the cement by volume to be studied at five different ages using water curing and vacuum curing. These percentages were compared alongside a controlled cement paste without additives. Testing was carried out on 350 samples. Analysis methods utilized Fourier Transfer Infrared Spectroscopy (FTIR) to monitor the hydration with spectra, Scanning Electron Microscope (SEM) to generate images for regional analysis and MTS testing machine for compressive strength. Results demonstrated that silica fume replacement had the highest overall increase in the CSH and thus in the strength of the hardened cement paste that was cured by water curing. Replacement of fly ash exhibited the highest overall strength under vacuum curing. Also, FTIR and SEM testing showed an increase in the change of CSH area with age. SEM testing revealed the formation of pores, CSH and CH in images at all ages. The area of CSH grows most in early ages and diminishes over time. Although it was clear that the method of curing makes a difference in hydration, further research is needed on the method of vacuum sealing hardened cement paste.

American Journal of Engineering and Applied Sciences, 2013

The behavior of reinforced concrete beams at failure by shear is distinctly different from their ... more The behavior of reinforced concrete beams at failure by shear is distinctly different from their behavior by bending, which is considered to be unsafe mode of failure. The shear failure of beams is usually sudden without sufficient advanced warning and the diagonal cracks that develop due to excess shear forces are considerably wider than the flexural cracks. The cost and safety of shear reinforcement in reinforced concrete beams led to the study of other alternatives. Swimmer bar system is a new type of shear reinforcement. It is a small inclined bars, with its both ends bent horizontally for a short distance and welded to both top and bottom flexural steel reinforcement. Regardless of the number of swimmer bars used in each inclined plane, the swimmer bars form plane-crack interceptor system instead of bar-crack interceptor system when stirrups are used. Test results of several reinforced concrete beams will be presented. The effectiveness of the new swimmer bar system as related to the old stirrup system will be discussed. Beam deflection is also targeted experimentally in the lab. Several deflection measurements were taken to study the effect of using new swimmer bar system on deflection. Also the crack width of the tested reinforced concrete beams was monitored.

Road Materials and Pavement Design, 2015

Asphalt oxidative ageing and excessive hardening are known causes of premature pavement cracking.... more Asphalt oxidative ageing and excessive hardening are known causes of premature pavement cracking. Asphalt ageing occurs mainly due to the oxidation of certain functional groups in asphalt as well as the loss of the maltene phase disturbing colloidal stability and increasing micellisation concentration. This in turn can cause large non-soluble asphaltene aggregates which are typically suspended in the maltene solution and are stabilised by resin molecules to flocculate. Flocculation can cause the asphalt to become stiffer and more brittle. It should be noted that excessive hardening and brittleness of asphalt caused by oxidation during pavement production and service life increase the susceptibility of asphalt pavements to cracking. Therefore, reducing the extent of asphalt oxidation could increase pavement service life. Therefore, it is imperative to reduce/delay asphalt oxidation in asphalt binder. There have been several studies on delaying asphalt oxidation by introducing modifiers and anti-ageing additives. Furfural, an organic compound derived from a variety of agricultural by-products, has been shown to be a promising modifier for petroleum asphalt binders used in asphalt pavement. Accordingly, this paper investigates the effect of introducing furfural as an antioxidant for asphalt by evaluating the extent of oxidation ageing in asphalt specimens modified by 1%, 2% and 5% furfural. To do so, furfural was introduced to asphalt and the level of change in physiochemical and rheological properties of asphalt after specimens were exposed to short-and long-term ageing was examined. Accordingly, performance characteristics of the base asphalt were compared with those of furfural-modified asphalts using a rotational viscometer, Fourier transform infrared spectroscopy and a dynamic shear rheometer to evaluate the rheological properties of asphalt modified with furfural at different percentages. The study results showed that the addition of furfural helped reduce the extent of oxidative ageing while enhancing high-temperature performance of asphalt binder. Specifically, it was found that the 2% furfural modification had the lowest ageing index after ageing, indicating an improvement in binder oxidative ageing.

American Journal of Engineering and Applied Sciences, 2021

Powder packing is a very important aspect of additive manufacturing (3-D printing), as it directl... more Powder packing is a very important aspect of additive manufacturing (3-D printing), as it directly impacts the final physical and mechanical properties of the printed objects. Improving the packing density of powder directly impacts the microstructure of the finished 3D-printed product, which also contributes to the surface finish. In order to achieve the densest packing for a powder, different sizes of that powder must be mixed together in such a way that we minimize the voids, thereby increasing the density of the powder. To achieve this, a model that predicts the volume fraction of each powder grade becomes necessary to predict the maximum possible powder density. A wide variety of models have been developed for packing density which can be classified as: Binary Mixture Models, Ternary Mixture Models and Multi-Component Mixture Models. In this project, the Furnas ternary model and the modified Toufar binary model were used to evaluate the packing density of Boron powder. Two sets of Boron powders were used for the analysis: First set: d10 = 75 µm, d50 = 90 µm, d90 = 106 µm and the second set: d10 = 3.11 µm, d50 = 14.0 µm, d90 = 30.2 µm. The three different sizes of each powder were randomly mixed to obtain the maximum packing density and compared with the theoretical packing density obtained by Furnas ternary model. The three sizes were then reduced to two sizes to obtain the packing density and compare the result with the modified Toufar binary model. Different mix rations were performed to evaluate the results obtained from both Furnas model and modified Toufar model. Results indicated that the models accurately predicted the maximum density of metal powder. Packing density obtained experimentally was 1.73 g/cm 3 at a mix ratio (coarse: Fine) of 89:11, while the values obtained by Furnas model and modified Toufar were 1.72 at 87:13 mix and 1.73 g/cm 3 at 89:11 mix respectively.

Energy Research Journal, 2018

Hydrogen is the best friend of man and the environment. Actually, it is the core element from tha... more Hydrogen is the best friend of man and the environment. Actually, it is the core element from that can extract energy, at infinity, in various forms. Until now has not been sufficiently exploited, but once with the evolution of the human species is the time to start to pool all types of energy which the hydrogen and its isotopes may donate them to us. Obviously the most abundant are nuclear energies which may be extracted from the hydrogen, either by well-known reaction of fission or through the much-desired fusion. In the reaction of a merger Deuterium-Tritium, for example, the energy required to overcome the Coulomb barrier is 0.1 MeV. Conversion between the energy and the temperature shows that the barrier of 0.1 MeV would be exceeded at a temperature of over 1.2 billion Kelvin degrees. According to the static calculations required a temperature of fusion to warm temperature is about 4 billion degrees. There is already an increase of almost four times than the latest calculations indicated by specialists. But calculating using radius determined dynamically, when the energy required is much higher, we come to a temperature necessary for the attainment of the thermonuclear fusion reaction of 40 trillion degrees, as for any 1 keV is needed about 10 million degrees temperature. Hot temperatures the merger being elusive, scientists have thought of achieving cold fusion.

American Journal of Engineering and Applied Sciences, 2018

The cross-machine has frequent uses in mechanical assemblies, automation, robotics and mechanisms... more The cross-machine has frequent uses in mechanical assemblies, automation, robotics and mechanisms with various uses. In the present paper we want to present this type of mechanism with its main, geometric, cinematic, strengths and propose its study in its possible use as an internal combustion engine. In this novelty, the mechanism will have two types of operation, one when operated from the crank (a compressor operation) and another when actuated from the piston (a motor operation). The forces will be presented along with their distribution (how the forces are distributed from one element to the other) in both modes of operation, compressor and engine.

American Journal of Engineering and Applied Sciences, 2018

This study evaluates the effectiveness of using a Bio-modified Nanoclay additive (BNC) to reduce ... more This study evaluates the effectiveness of using a Bio-modified Nanoclay additive (BNC) to reduce the oxidative aging of asphalt pavements. The study results through X-Ray Diffraction analysis showed that the modification of montmorillonite clay with bio-modifier increased the basal d-spacing of clay. The resulting nanoclay with increased interlayer spacing was chosen for application in asphalt binder. Rheological characterization of clay-modified asphalt binder were studied before and after oxidation aging. The effects of BNC on asphalt complex modulus were observed to be prevailing in the intermediate to high-temperature range. The aging resistance of asphalt binder showed improvement with the addition of nanoclay and the improvement was more notable in presence of bio modified-nanoclay than pure clay.

American Journal of Engineering and Applied Sciences, 2018

Properties such as durability and moisture resistance of asphalt concrete significantly improve p... more Properties such as durability and moisture resistance of asphalt concrete significantly improve pavement service life. When siliceous aggregate is used, then preventing moisture damage and stripping become distinctly required. Typically, stripping could be prevented by either using antistripping agents or by modifying the binders. The anti-stripping agent achieve its purpose by changing the aggregates' affinity for water through changing the zeta potential (promote bitumen adsorption due to negative surface charge). On the other hand, modifications of binders promote interface bonding between aggregate particles and bitumen. However, the process of applying anti-stripping agents or adhesion promoters is typically costly and, in some cases, may negatively impact other performance characteristics of pavement. Accordingly, this paper examines the merit of applying natural bitumen (gilsonite) instead of typically used anti-stripping chemicals in order to both promote resistance to moisture damage and reduce construction cost in asphalt. In addition to being quite low-cost, Gilsonite has a chemical composition nearly similar to that of petroleum based asphalt which makes it very compatible with asphalt binder.

American Journal of Engineering and Applied Sciences, 2018

A mechanism with an oscillating slider is a mechanism quite often used in the technique. It has s... more A mechanism with an oscillating slider is a mechanism quite often used in the technique. It has some advantages over other similar mechanisms being able to work with accelerations and reduced forces under the same conditions with another similar mechanism. For example, an internal combustion engine could be built more efficiently with this mechanism, resulting in a motor that would successfully replace Otto's classic one. In the paper, the kinematics, forces and their distribution will be presented within such a mechanism.

Proceedings of International Structural Engineering and Construction, 2016

This study investigated the compressive strength of hardened cement paste and the formation of ca... more This study investigated the compressive strength of hardened cement paste and the formation of calcium silicate hydrate (C-S-H) with the addition of nano silica (SiO2). Through this search, the development of the concretes strength was determined to better understand the process of cement hydration. Compressive strength testing was performed using MTS and Forney testing machines to determine stress-strain curves and elastic modulus of materials. The hydration process and formation of C-S-H and calcium hydroxide (CH) was examined using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). This study also incorporates the use of vacuum curing, in comparison to that of the traditional water curing method. Results indicate an increase in compressive strength using 1%, 3% and 5% of nano silica to cement replacement by volume in comparison to the control mix (without nano silica). The optimum cement replacement to yield maximum strength was of the 1% nano ...

American Journal of Engineering and Applied Sciences, 2018

The main idea is that, as the forests of the planet are getting smaller, too much wood is cut and... more The main idea is that, as the forests of the planet are getting smaller, too much wood is cut and the forests are made too slow, there are also large forest fires due to excessive heat, of people arguing with the law, or simply by chance. Extinguishing fires are generally difficult, interventions being difficult anyway due to the increased fire, the heavy access of the firefighters to the forest, the wind that often attacks the fire and especially due to the late intervention of the specialized firefighters. A first aid could come from finding out the moment when such a fire broke out and instantly signaling it with modern wireless systems. Today, the planet's best surveillance system is the one made with artificial geostationary satellites, which instantly signals the outbreak of the fire. The system set up by NASA is indeed the most efficient possible. Find out quickly by the outbreak of fire the chances for him to be controlled quickly grow very much. NASA's satellite tools are often the first to detect fires that are burning in distant regions and new fire locations are sent directly to field managers around the world in a few hours of satellite travel. Together, NASA's tools, including a number built and run by the JAS NASA lab in Pasadena, California, have detected fire-fighting actions by tracking fires by providing information on fire management and stair scaling in scar scars. NASA has a fleet of earth observation tools, many of which contribute to our understanding of the Earth's fire. Satellites in orbit around the poles provide observations of the entire planet several times a day, while satellites in geostationary orbit offer rough resolution images of fire, smoke and clouds every five to fifteen minutes. "NASA's satellite, land and space survey captures the total impact of the fire on the Earth, from early detection of smoke and ecosystems to decades after the fire," said Doug Morton, a researcher at Greenbelt, Maryland. Much of the remote sensing data that NASA collects for fires is quickly available to help disaster response efforts around the world. The NASA earthquake program supports this application science and mobilizes for high-risk global events that cover a range of natural hazards-not only fires, but also earthquakes, tsunamis, floods, landslides, severe weather, winter, tropical cyclones and volcanoes. In this study we want to propose the future use of robots instead of humans for such dangerous fire-fighting interventions in a forest in flame. Robotic and automated vehicles may be prepared to take over this difficult task for man, extinguishing such a fire making it simpler and less dangerous for humans.

American Journal of Engineering and Applied Sciences, 2018

If you can live on Mars, or if there was life on this planet, it's a natural question. The popula... more If you can live on Mars, or if there was life on this planet, it's a natural question. The population of our planet has far outstripped the boundaries from which the planet begins to overcrow. Global resources are decreasing, while their consumption is rising more and more. The world's population is growing, it needs housing, food, water, air, clothes, transport, energy and the possibilities offered by our planet are getting smaller. Because we have long been behind the "conquering space" chapter, we are now seriously thinking about limiting the existing resources for the current and future population and those who are looking for extensions on water or in desert areas. In order to conquer the cosmic space with the current technologies, it is necessary a very large financial, sustained financial effort, but unfortunately, it is not at the level of necessity. Under these circumstances, it is natural to wonder whether there is a possibility of living on Mars, which is a subject of particular interest for astrobiology due to the proximity of the planet and its similarities to the Earth. So far, no concrete evidence of past or present life has been found on Mars, but the evidence now shows clearly that during the Noachian Ancient Period, Mars' surface environment had liquid water and could be useful to microorganisms. Surely the existence of living conditions does not necessarily imply the presence of life. ExoMars (Mars Exobiology) is a two-part astrobiology project to look for Martian life proofs, a joint mission of the European Space Agency (ESA) and the Rosice Rosice Space Agency. The first part of the project, launched in 2016, placed a research and communication satellite on Marte's orbit and launched a stationary experimental landing vehicle (which collapsed). The second part of the project is planned for 2020 when a rover will be launched and landed on the surface of Mars, sustaining a scientific mission that is expected to last until 2022 or even later. The major goals of ExoMars programs are to look for previous life signs on Mars, to investigate how martian waters and geochemical environments, atmospheric gas studies and their sources vary. It will search for old biosigns in Martian life, using several elements of spacecraft that will be sent to Mars in two launches. ExoMars Trace Gas Examiners (TGO) and a stationary testator named Schiaparelli were launched on March 14, 2016. TGO entered Mars orbit on October 19, 2016 and will continue to capture methane (CH 4) and other gas pathways present in the Martian Atmosphere that could be a proof of possible biological or geological activity.

Independent Journal of Management & Production, 2019

In other papers already presented on the structure and dimensions of elemental hydrogen, the elem... more In other papers already presented on the structure and dimensions of elemental hydrogen, the elementary particle dynamics was taken into account in order to be able to determine the size of the hydrogen. This new work, one comes back with a new dynamic hypothesis designed to fundamentally change again the dynamic particle size due to the impulse influence of the particle. Until now it has been assumed that the impulse of an elementary particle is equal to the mass of the particle multiplied by its velocity, but in reality, the impulse definition is different, which is derived from the translational kinetic energy in a rapport of its velocity. This produces an additional condensation of matter in its elemental form.

SSRN Electronic Journal, 2017

The development and diversification of machines and mechanisms with applications in all fields re... more The development and diversification of machines and mechanisms with applications in all fields require new scientific researches for the systematization and improvement of existing mechanical systems by creating new mechanisms adapted to modern requirements, which involve increasingly complex topological structures. The modern industry, the practice of designing and building machinery is increasingly based on the results of scientific and applied research. Each industrial achievement has backed theoretical and experimental computer-assisted research, which solves increasingly complex problems with advanced computing programs using an increasingly specialized software. The robotization of technological processes determines and influences the emergence of new industries, applications under special environmental conditions, the approach of new types of technological operations, manipulation of objects in the alien space, teleoperators in the top disciplines like medicine, robots covering a whole field greater service provision in our modern, computerized society. Movable, robotic, mechatronic mechanical systems have entered nearly all industrial spheres. Today, we can no longer conceive of industrial production without these extremely useful systems. They are still said to steal from people's jobs. Even so, it should be made clear that these systems create value, work in difficult, repetitive, nonpausing, high-quality work, without getting tired, without getting sick, without salary, and producing value who are paid and people left without jobs, so that they can work elsewhere in more pleasant, more advantageous conditions, with the necessary breaks. Before studying the trajectory of a tracer point, through the command laws in the active kinematic clutch space of the robot, the MPz configuration must be set in which the characteristic point occupies the initial and final positions. In the general case, the trajectory of the characteristic point of MPz is materialized by a curve in 3D geometric space, a curve that can be obtained by interpolation on specific portions, depending on the set points of precision. For the manipulation of an object between the initial and the final positions, the following work operations are required: grip (in the initial position), liftingdetachment (by the laying surface), displacement (to the final position, descent) and release (in the final position).

SSRN Electronic Journal, 2017

The development and diversification of machines and mechanisms with applications in all fields re... more The development and diversification of machines and mechanisms with applications in all fields require new scientific researches for the systematization and improvement of existing mechanical systems by creating new mechanisms adapted to modern requirements, which involve increasingly complex topological structures. The modern industry, the practice of designing and building machinery is increasingly based on the results of scientific and applied research. Each industrial achievement has backed theoretical and experimental computer-assisted research, which solves increasingly complex problems with advanced computing programs using an increasingly specialized software. The robotization of technological processes determines and influences the emergence of new industries, applications under special environmental conditions, the approach of new types of technological operations, manipulation of objects in the alien space, teleoperators in the top disciplines like medicine, robots covering a whole field greater service provision in our modern, computerized society. Movable, robotic, mechatronic mechanical systems have entered nearly all industrial spheres. Today, we can no longer conceive of industrial production without these extremely useful systems. They are still said to steal from people's jobs. Even so, it should be made clear that these systems create value, work in difficult, repetitive, non-pausing, high-quality work, without getting tired, without getting sick, without salary, and producing value who are paid and people left without jobs, so that they can work elsewhere in more pleasant, more advantageous conditions, with the necessary breaks. In other words, robots do not destroy people but help them in the process of work. Let us not remember the fact that in some environments people could not even work. In fact, the robot's profitability for work without stopping, repetitive, and qualitative, is no longer in question. In addition, there are many heavy operations that are absolutely necessary for the presence of robots. You can not create microchips with people directly without interposing the robot. Man can not directly work with objects of such small size. Neither difficult medical operations can be designed without robotic mechatronic systems. The most used robotic mechanical mechanical systems are the anthropomorphic ones in the class of serial systems. To this we have studied the direct kinematics in previous castings, and in this paper we are going to study the inverse kinematics.

Journal of Mechatronics and Robotics, 2018

Mechanical systems in motion type parallel structures are solid, fast and accurate. Between mobil... more Mechanical systems in motion type parallel structures are solid, fast and accurate. Between mobile systems parallel the best known and used system is that of a Stewart platforms, as being and the oldest system, quickly, solid and accurate. The paper presents a few main elements of the Stewart platforms. In the case where a motto element consists of a structure composed of two elements in a relative movement from the point of view of the train of propulsion and especially in the dynamic calculations, it is more convenient to represent the motto element as a single moving item. The paper presents an exact, original analytical geometry method for determining the kinematic and dynamic parameters of a parallel mobile structure. Compared with other methods already known, the presented method has the great advantage of being an exact analytical method of calculation and not one iterative-approximately.

American Journal of Engineering and Applied Sciences, 2017

This paper describes an application of industrial robots that gain ground mainly in the aerospace... more This paper describes an application of industrial robots that gain ground mainly in the aerospace industry. It is a TTT manipulator whose task is to automatically position the end-effector, in this case a complex sensor system and a eddy-current probe in the position set by the software application for testing by non-destructive ultrasound control of tickets and bars of titanium, both round and square, or any other transparent ultrasound metal (obviously in a certain range of sizes). For surface control, the effector also includes a Eddy current (Eddy current control system). The installation performs ultrasonic control by the echo boost method in total immersion using as a water coupling medium. This method provides the best coupling for automated control systems. This plant was specially produced for ZIROM S.A. A unique producer of titanium ingots in Romania by the reputed German company Karl Deutch (leader in this field), the founder of the company being also one of the inventors of the non-destructive ultrasonic control method, the part of Eddy current being produced by the German company Prüftechnik. This paper aims to explore the state of the art of non-destructive automatic ultrasonic control techniques according to the possible methods to be adopted, by the applications that demand such methods, by reviewing a series of installations more or less similar to those of Zirom s.a. It is thus found that there are a multitude of pine technical solutions that can be done with an ultrasonic automatic control and precision. In this context, the last chapter of the paper that attempts to probe the possible evolution of the future of US control in this field is of great importance because in the current pace of innovations in all fields, but especially in IT and electronics, the future holds many surprises.

American Journal of Engineering and Applied Sciences, 2014

A laboratory study was conducted to investigate the effects of Amine based modifier on rheologica... more A laboratory study was conducted to investigate the effects of Amine based modifier on rheological characteristics of particle filled viscous medium such as asphalt binder in presence of Recycled Asphalt Shingles (RAS). In this study, virgin asphalt binder (PG 64-22), three different percentages (20, 30 and 40%) of tear-off shingles and modifiers; Rediset, Evotherm and Bio-binder were used. The tear-off shingles acquired from local reroofing company in Greensboro, North Carolina; were finely grinded (85% passing of sieve # 200). The virgin binder and different percentages of RAS were then blended at 180°C using shearing speed of 400 rpm. Following that themixture was blended with 1.5% of Rediset, 0.5% of Evotherm and 5% of bio-binder. The properties of the blended binder were studied using the Rotational Viscometer (RV) equipped with two different spindle types:-One was Smooth Cylindrical spindle (SC4-27D) and the other one was Vane spindle (V 73). The analysis showed that the viscosity was increased with increasing the RAS percentage. Furthermore, the viscosity measured by vane spindle was continuously higher than the value measured by smooth spindle; however the difference between the two measurements reduced as the blending were improved using modifiers. Moreover, temperature found to be the main contributor to reduction of the viscosity in both spindles cases. In addition the coefficient of variation was significantly lower in the case of vane spindle, indicating that the vane spindle could be more appropriate in measuring viscosity of particle filled viscous medium such as RAS asphalt. Based on the experimental result an empirical index called blending index was introduced in this study to measure the blending behavior and status for modified mixtures. As expected it was found that the blending index increases as the temperature and rotational speed increases. In other word, higher temperature and shearing rate could enhance blending resulting in higher blending index. The blending index was further used as a laboratory measure to compare effectiveness of various additives in enhancing blending of RAS modified mixtures. It was shown that among three modifiers used in this study, the bio-binder was more effective to increase the blending index.

American Journal of Engineering and Applied Sciences, 2017

Concrete strength improved substantially when lateral confinement stresses are provided. This eff... more Concrete strength improved substantially when lateral confinement stresses are provided. This effect has been exploited in this study in composite beams at the concrete compression zone. New type of confinement is used in this research. The confinement of concrete in the compression zone is accomplished by providing U-links and stud-plate systems. The U-links are steel bars in the shape of the letter U welded internally in a steel tube at the compression concrete zone. These tubes provide confinement effect similar to the stirrups used in reinforced concrete beams. The stud-plate element used in this study is made of steel bar welded to a horizontal plate at one of its end, while the other end is welded to the top of the steel tube at the compression zone from the inside of the tube. The main function of these two elements is to provide the concrete in the compression zone with confinement stresses. The composite beam is tested in bending under single load at the mid-span. The effect of the new confinement system is studied and compared with concrete filled tube without any confinement element. The failure mechanism is also a focus of this research along with the deflection at the mid-span of the beam. The effect of the new confinement system on the structural behavior of the composite beam is presented.

American Journal of Engineering and Applied Sciences, 2016

A numerical model was derived to obtain results for two alloys during the Gas Atomization (GA) me... more A numerical model was derived to obtain results for two alloys during the Gas Atomization (GA) method. The model equations and governing equations were implemented through the application of part I data. Aspects such as heat transfer, fluid mechanics, thermodynamics and law of motions were taken into account for the formulation of equations that take gas dynamics, droplet dynamics and energy balance or conservation into consideration. The inputs of the model include: Processing parameters such as the size of the droplets, characteristics of the metal alloy, initial temperature of the molten metal, properties and fractions of the atomization gas and the gas pressure. The outputs include velocity and thermal profiles of the droplet and gas. Velocity profiles illustrate the velocity of both droplet and gas, while thermal profiles illustrate cooling rate and the rate of temperature change of the droplets. The alloys are gamma-Titanium Aluminide (γ-TiAl) and Al-3003-O. These alloys were selected due to the vast amount of applications both can have in several industries. Certain processing parameters were held constant, while others were altered. The main focus of this study was to gain insight into which optimal parameters should be utilized within the GA method for these alloys and to provide insight into the behavior of these alloys.

American Journal of Engineering and Applied Sciences, 2016

This research work investigates the effect of fly ash and silica fume on cement paste hydration. ... more This research work investigates the effect of fly ash and silica fume on cement paste hydration. Percentages of each additive were selected to replace the cement by volume to be studied at five different ages using water curing and vacuum curing. These percentages were compared alongside a controlled cement paste without additives. Testing was carried out on 350 samples. Analysis methods utilized Fourier Transfer Infrared Spectroscopy (FTIR) to monitor the hydration with spectra, Scanning Electron Microscope (SEM) to generate images for regional analysis and MTS testing machine for compressive strength. Results demonstrated that silica fume replacement had the highest overall increase in the CSH and thus in the strength of the hardened cement paste that was cured by water curing. Replacement of fly ash exhibited the highest overall strength under vacuum curing. Also, FTIR and SEM testing showed an increase in the change of CSH area with age. SEM testing revealed the formation of pores, CSH and CH in images at all ages. The area of CSH grows most in early ages and diminishes over time. Although it was clear that the method of curing makes a difference in hydration, further research is needed on the method of vacuum sealing hardened cement paste.

American Journal of Engineering and Applied Sciences, 2013

The behavior of reinforced concrete beams at failure by shear is distinctly different from their ... more The behavior of reinforced concrete beams at failure by shear is distinctly different from their behavior by bending, which is considered to be unsafe mode of failure. The shear failure of beams is usually sudden without sufficient advanced warning and the diagonal cracks that develop due to excess shear forces are considerably wider than the flexural cracks. The cost and safety of shear reinforcement in reinforced concrete beams led to the study of other alternatives. Swimmer bar system is a new type of shear reinforcement. It is a small inclined bars, with its both ends bent horizontally for a short distance and welded to both top and bottom flexural steel reinforcement. Regardless of the number of swimmer bars used in each inclined plane, the swimmer bars form plane-crack interceptor system instead of bar-crack interceptor system when stirrups are used. Test results of several reinforced concrete beams will be presented. The effectiveness of the new swimmer bar system as related to the old stirrup system will be discussed. Beam deflection is also targeted experimentally in the lab. Several deflection measurements were taken to study the effect of using new swimmer bar system on deflection. Also the crack width of the tested reinforced concrete beams was monitored.

Road Materials and Pavement Design, 2015

Asphalt oxidative ageing and excessive hardening are known causes of premature pavement cracking.... more Asphalt oxidative ageing and excessive hardening are known causes of premature pavement cracking. Asphalt ageing occurs mainly due to the oxidation of certain functional groups in asphalt as well as the loss of the maltene phase disturbing colloidal stability and increasing micellisation concentration. This in turn can cause large non-soluble asphaltene aggregates which are typically suspended in the maltene solution and are stabilised by resin molecules to flocculate. Flocculation can cause the asphalt to become stiffer and more brittle. It should be noted that excessive hardening and brittleness of asphalt caused by oxidation during pavement production and service life increase the susceptibility of asphalt pavements to cracking. Therefore, reducing the extent of asphalt oxidation could increase pavement service life. Therefore, it is imperative to reduce/delay asphalt oxidation in asphalt binder. There have been several studies on delaying asphalt oxidation by introducing modifiers and anti-ageing additives. Furfural, an organic compound derived from a variety of agricultural by-products, has been shown to be a promising modifier for petroleum asphalt binders used in asphalt pavement. Accordingly, this paper investigates the effect of introducing furfural as an antioxidant for asphalt by evaluating the extent of oxidation ageing in asphalt specimens modified by 1%, 2% and 5% furfural. To do so, furfural was introduced to asphalt and the level of change in physiochemical and rheological properties of asphalt after specimens were exposed to short-and long-term ageing was examined. Accordingly, performance characteristics of the base asphalt were compared with those of furfural-modified asphalts using a rotational viscometer, Fourier transform infrared spectroscopy and a dynamic shear rheometer to evaluate the rheological properties of asphalt modified with furfural at different percentages. The study results showed that the addition of furfural helped reduce the extent of oxidative ageing while enhancing high-temperature performance of asphalt binder. Specifically, it was found that the 2% furfural modification had the lowest ageing index after ageing, indicating an improvement in binder oxidative ageing.