Marshall Parameters of Hot Mix Asphalt with Variable Filler Types and Aggregate Gradations (original) (raw)
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EVALUATION OF AGGREGATE AND MINERAL FILLER TYPES ON CHARACTERISTICS OF HOT MIX ASPHALT
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The Effect of Filler Type on the Hot Mix Asphalt Behavior
The test have been done on many samples of Hot Mix Asphalt using many types fillers like Portland Cement, Limestone, Hydrated Lime as a filler, 1% Hydrated Lime added to conventional mixture, Portland Cement introduced in cold state, and passing sieve no.200 dust (conventional mixture). In this research, Marshall test procedure is used to investigate the potential prospects to enhance Hot Mix Asphalt properties. The objectives also include determining which one of the additives is better than the others to be used and the method of introducing this filler type to the mixture. According to the results, we found out that the better filler affects the mechanical properties of Hot Mix Asphalt is Portland cement when it introduced with the aggregate at the mix temperature. ا ا ا ف ا ادة ع ا اواد ن أواع دة م ا ا ط ذج اص إراء م د ھ ا) ا ت ادي اوردي , ارة , اط اورة , رم ل ن ار ار) 200 (, اد م م ا ام ت اد) ن...
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The mix design procedure used in Superior Performance Asphalt Pavements (Super-pave) was created by the Strategic Highway Research Program (SHRP) in response to the limitations and empirical approach of Marshall methodology. This study aims to compare the Marshall asphalt mixture design method with the Super-pave asphalt mixture design procedures. Locally available aggregates commonly used in asphalt concrete mixtures in Oman were used. The asphalt mixtures were made with aggregate and asphalt-binder with a penetration grade of 60/70 and PG 64-10. Samples from two mixes were made accordingly. Volumetric properties analysis, flow, Marshall stability, and loss of Marshall stability tests were carried out. According to the study findings, the optimum asphalt composition was 4.5% when utilizing the Marshall methodology and 5.5% when using the Super-pave approach. Furthermore, the Super-pave specimens showed less loss of Marshall stability (22.22%) than the Marshall specimen (30.09%).
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IOP Conference Series: Materials Science and Engineering, 2019
Warm mix asphalt (WMA) is a new sustainable technology that gives an economic and environmental beneficial value by means of production temperature decrease of the asphalt mixture by (10-40) °C. The difference between conventional Hot Mix Asphalt (HMA) and WMA mixes were analyzed, in this study, in term of marshall properties which conducted on specimens are produced of: Al-Nibaae source aggregate and Al-Dorah Refinery source asphalt binder (40/50 PEN) modified by two organic additives (Asphaltan A and Asphaltan B). The laboratory tests to determine the mechanical properties of asphalt binder and aggregates are conducted. Two types of aggregate gradation mixtures are designed to perform HMA and WMA preparations using Marshall design method. Doses of 1, 2, and 3% of the additives by total weight of asphalt binder were chosen. WMA mixtures are prepared at 40 °C less than HMA specimens and produced by the same procedure. Many changes on mechanical and physical properties are observed d...
Impact of Aggregate Gradation and Filler Type on Marshall Properties of Asphalt Concrete
The Journal of Engineering, 2015
As asphalt concrete wearing course (ACWC) is the top layer in the pavement structure, the material should be able to sustain stresses caused by direct traffic loading. The objective of this study is to evaluate the influence of aggregate gradation and mineral filler type on Marshall Properties. A detailed laboratory study is carried out by preparing asphalt mixtures specimens using locally available materials including asphalt binder (40-50) penetration grade, two types of aggregate gradation representing SCRB and ROAD NOTE 31 specifications and two types of mineral filler including limestone dust and coal fly ash. Four types of mixtures were prepared and tested. The first type included SCRB specification and limestone dust, the second type included SCRB specification and coal fly ash, the third types included ROAD NOTE 31 specification and limestone dust and the fourth type included ROAD NOTE 31 specification and coal fly ash. The optimum asphalt content of each type of mixtures ...
The Effect of Filler Type And Content on Asphalt Mixture Properties
Journal of Duhok University, 2022
The performance of the asphalt mixture is affected by the properties and specifications of the materials that make up the mixture, like bitumen, aggregate, and the types of the filler mineral material, as it has shown in many studies. In this study, the effect of filling type on asphalt mixture properties were studied using three different types and in different proportions, where Gravel powder, Limestone powder, and Portland Cement were used and with ratios of (3.5%, 5%, 6.5%) of the total weight of aggregate with Bitumen content (3.5%, 4%, 4.5%, 5%, 5.5%). This research is dedicated to study the effect of filler type and amount on the asphalt mixture properties. The general results of the Marshall test showed an improvement in some properties of the asphalt mixture with 5% of Bitumen content, where the results showed that the use of Gravel powder improves the Stability property with an increase rate between 4% to 21% and 8% to 16% Compared to Limestone powder and Portland cement respectively. Also, the value of VMA% of gravel powder samples increased by 5% and 3% for both Limestone powder and Portland cement respectively. There is also a large convergence in the results of Retained Strength for each of Gravel powder and Portland cement, where the percentage of reached more than 98% and 97% for each of Gravel powder and Portland cement respectively.
Volumetric Analysis and Performance of Hot Mix Asphalt with Variable Rap Content
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Incorporating Reclaimed Asphalt Pavement (RAP) to the asphalt concrete mixture for highway construction offer many benefits including energy consumption, conservation of natural resources and preservation of the environment to associated emissions. This paper presents a study on performance of Hot Mix Asphalt with variable RAP content. The study is carried out to evaluate the Marshall Properties and Performance of RAP-Asphalt mixes using conventional asphaltic concrete mix AC14. Marshall Mix Design Method was used to produce control mix (0% RAP) and RAP-Asphalt mixes samples which consist of 15% RAP, 25% RAP and 35% RAP in accordance with Specifications for Road Works of Public Works Department, Malaysia. The Marshall Properties analysis was performed to ensure compliance with Marshall Requirements, The resilient modulus test was performed to measure the stiffness of the mixes while Modified Lottman test was conducted to evaluate the moisture susceptibility of these mixes. The results obtained showed that there were no substantial difference in Marshall Properties, moisture susceptibility and indirect tensile strength between RAP-Asphalt mixes with the control mix. The test results indicated that recycled mixes performed as good as the performance of conventional HMA in terms of moisture susceptibility and resilient modulus. It is recommended that further research be carried out for asphalt mixes containing more than 35% of RAP material.
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Highways have been and are built using Hot Mix Asphalt (HMA) as surface layer. The most common HMA design procedure is the Marshall Method, a method also used for quality control (QC) at the time of road construction. Due to several factors, sometimes it is not possible to sample the surface layer when constructed. When this occurs, QC is performed after construction by analyzing cores. Current regulations, however, fail having clear procedures regarding the collection and analysis of pavement cores after the complete placement of the asphalt mixture. For this reason, this study proposes a comparative analysis of Marshall parameters, mixture densities, and aggregates gradation obtained from specimens obtained during construction, versus cores samples extracted 30 and 60 days later. The research revealed that all the parameters measured on core samples, except flow, could be used to approve asphalt paving works after its construction.