Flexural behaviour of cement added geopolymer concrete (original) (raw)
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Effect on Flexural Strength of Geopolymer Concrete by Using Fly Ash and Alkaline Solution
International Journal of Civil Engineering and Technology
With the passing of times, the emission of Carbon from different aspects are on a verge of rise, as the time passes by the rate goes on increasing, production of cement also adds up in the emission of carbon, Replacing Cement 100% by Fly Ash is a step taken to decrease the carbon emission from concrete, By replacing Geo-polymers in concrete in place of cement by using waste materials as binders, & implementing various curing techniques to provide strength to our units.
Experimental Study on Geopolymer Concrete with Replacement of Fly ASH and GGBS
IJRASET, 2021
In Twenty First century infrastructure development concrete has come out as the dominant construction material due to its longevity and strength. The main component used in the concrete preparation is ordinary Portland cement whose production release large amount of carbon dioxide into atmosphere that causes greenhouse effects. Various surveys suggest industries around the globe contribute about 6%of carbon dioxide that is releasing into the atmosphere. In spite of this major environmental concern, we cannot reduce the use of ordinary Portland cement for making concrete. In this study concrete is prepared by using geopolymer technology i.e. by mixing fly ash, ground granulated blast furnace slag, sodium silicates, sodium hydroxide are mixed. Specimen curing is done at regular intervals of 3 days, 7days, and 28days. Compressive, split and flexural strength obtained after 3 days, 7 days and 28 days. Acid, Sulphate test and permeability test done for 14 and 28 days of curing the specimen. More strength occurred at mix 5 of fly ash 30% and GGBS 70%.
Flexural Behavior of Fly ash and GGBS Based Ambient Cured Geopolymer Concrete Beams
International Journal for Research in Applied Science and Engineering Technology (IJRASET), 2022
Concrete is the world's most versatile, durable and reliable construction material. Next to water, concrete is the most used material, which required large quantities of Portland Cement. Ordinary Portland Cement production is the major generator of carbon di oxide, which polluted the atmosphere. In addition to that large amount energy was also consumed for the cement production. Hence, it is essential to find an alternative material to the existing most expensive, most resource consuming Portland Cement.The study describes experimental investigation on flexural behavior of reinforced GPC. A total of eighteen beams were tested. From this, nine were of M20 mix, i.e., conventional concrete beams while nine were of geopolymer concrete,from this nine beams, three beams with the ratio of binder i.e., flyash:GGBS ratio as 75:25, other three with 70:30 while remaining three beams with 65:35. Also, 12 cubes & 12 cylinders were also casted and tested for compressive strength and split tensile strength respectively. From them, three were of conventional concrete while other nine of GPC with three different ratios as mentioned above. The reinforcement was designed considering a balanced section for the expected characteristic strength. All the beam specimens were tested under two point static loading. The studies demonstrated, the study of conventional and geopolymer concrete beams related to deflection, first load at which crack appeared and their crack patterns.
2016
The main objective of this current study is to develop a cement free concrete material because of the green house effect during the manufacture of cement. It is reported that every one tonne production of cement emits one tonne carbon dioxide which causes global warming and in broad sense disturbs the entire ecological system. It results the promotion of geopolymer concrete where silica and alumina will bind together with alkaline solution during the process of polymerization. The researchers taken greater initiatives in geopolymer concrete there is no specific study related to the mix design because of commercialization and patenting. Hence the authors interested in identifying specific mix design using trial proportion of low calcium fly ash and alkaline solutions (sodium silicate and sodium hydroxide). This investigation deals with five different trial mixes with different molarity of NaOH (8M, 10M, 12M and 14M) and super plasticizer combinations under the curing temperature of 6...
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
The global demand of concrete for the construction of infrastructures is continuously increasing. The production of cement is highly intensive and it emits a lot of CO2 into the air which leads to the global warming. One of the effort to produce the environment friendly concrete is geopolymer concrete which emits less CO2. In the present study the feasibility of industrial by-products i.e.; Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBS) powder as eco-friendly and sustainable is studied. So the main aim of this study is to analyse the performance of fly ash and GGBS based geopolymer concrete with conventional concrete which are compared with respect to strength and durability parameters for (7days and 28 days) curing period. In this study strength parameters includes compressive strength, split tensile strength and flexural strength and durability parameters includes acid attack test and rapid chloride permeability test. The two different proportions of (70% fly ash+ 30% ggbs) and (60% fly ash+ 40% ggbs) are used in geopolymer concrete. The Alkaline solutions used are sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). The study includes casting of geopolymer concrete and conventional concrete specimens and tested for (7 and 28 days) ages for both strength and durability. The results show that Geopolymer concrete gives good strength and durability compared to conventional concrete. Thus, the Geopolymer concrete can be considered to be an environmentally pollution free construction material.
Flexural Behavior of Low Calcium Fly Ash Based Geopolymer Reinforced Concrete Beam
International Journal of Concrete Structures and Materials
Pioneering studies have been conducted on alternative cementitious material in the manufacturing of conventional concrete to reduce carbon emission and improve the overall efficacy. However, there are limited studies on eco-friendly materials with low calcium fly ash. This study aims to examine the strength fly ash geopolymer concrete and reduce carbon emission. In this investigation, flexural test is done for conventional and geopolymer concrete (GPC) beam samples after the fulfillment of rest period and 24 h steam curing at 60 °C. The experimental results prove that the initial characteristics of both specimens are almost similar. When GPC specimens reached the service, yield, and failure stages, the load carrying capacity, deflection increased up to 21.5 and 8.75%, respectively and better load bearing capacity, moment resistance, and crack propagation were observed more than in conventional cement. Fresh property test results indicated the achievement of standard workability with...
A Review on Geopolymer Concrete: A Green Concrete
2018
1P.G Student, Department of Civil Engineering, Chandigarh University 2Asst. Prof. Department of Civil Engineering, Chandigarh University ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract The use of OPC (Ordinary Portland Cement) and PPC (Portland Pozzolanic Cement) is growing at the faster rate and it is consumed after the water in the world. The production of different cement requires lot of energy and burning of fuel which leads to emissions of various gases such as CO2. The CO2 gas is major component for producing global warming and green house effect. There is a need to introduce such type of cement that should reduce the carbon emissions and act as eco friendly cement. Curtain University of technology have done research on geopolymer concrete mix design, structural behavior and durability Geopolymer concrete is actually manufactured by reusing and recycling of industrial solid was...
A study on the strength development of geopolymer concrete using fly ash
International Journal of Engineering & Technology, 2017
Cement consumption is increasing day by day due to the tremendous development in the infrastructure facilities. The production of one ton of cement emits approximately one ton of carbon dioxide to the atmosphere. In order to reduce the use of cement a new-generation concrete has been developed such as geopolymer concrete (GPC).Geopolymer Geopolymer is a new material which has the potential to replace ordinary Portland cement. It is an inorganic material synthesized by alkali activation of amorphous aluminosilicates at ambient or slightly increased temperatures having an amorphous to semi-crystalline polymeric structure. In this study, low calcium flyash from Tuticorin was used to produce geopolymer concrete. The geopolymer was synthesized with sodium silicate and sodium hydroxide solutions. The sodium hydroxide pellets was dissolved in the distilled water to make free from mixing water contaminants. The ratio of sodium silicate and sodium hydroxide ratio was kept as 2.5. The concent...
Strength of Geopolymer Concrete- a Review
2021
Concrete industries and environment has a very strong bond. Concrete demands OPC in large amount for building several huge and mega structures. The CO2 emission from Portland cement industries harms a lot to the environment. It is necessary to find alternate low emission binding solution for Portland cement. Geopolymer concrete is polymer material which utilizes the by products from coal and steel industries like fly ash, ground granulated blast furnace slag and also metakaoline etc. along with the alkaline activators. This paper reviews the strength parameters for class F fly ash based GPC and metakaoline based GPC. The geopolymer concrete is really a green solution for concrete to reduce CO2 emission. Index Terms – Alkaline Activators, fly Ash, Geopolymer concrete, Metakoaline.
Feasibility Study of High Strength with Fly-Ash Based Geopolymer Concrete
International Journal of Innovations in Engineering and Science, 2021
Concrete being the core element used for the construction across the world has a main ingredient in it called `cement'. Production of cement leads to larger amount of carbon dioxide in the environment with a staggering amount 8% of carbon dioxide annually, on the other hand there is still increase in significant number of construction projects day after day which leads to more demand of cement. Keeping the fact protection of environment into consideration there is an immediate need of an alternative material to cement which will have same properties of cement and of course which can help to achieve environmentally friendly construction. One material is geopolymer concrete. Geopolymer concrete uses alumina silicate rich sources as binder instead of ordinary cement. It also uses different additives like industrial by-products which has encouraged an increase in workability, compressive strength, durability and minimization of effects of temperature variation. Geopolymer concrete is an innovative material which is 100% cement free. Geopolymer concrete is necessity for the future of construction industry and for a sustainable environment.