METHODOLOGY

Volume: 07 Issue: 09 | Sep 2020 www.irjet.net p-ISSN: 2395-0072

A STUDY ON GEOPOLYMER CONCRETE BEHAVIOURS UNDER AMBIENT CURING

Mr.C.CHINNARAJ, M.E.,(Ph.D.,)* 1 , J.MANOJ KUMAR*2, M.BASKAR*3, S.PRAVEEN KUMAR*4

1*Assistant Professor, Department of Civil Engineering, Dr. N.G.P Institute of Technology, Coimbatore, Tamil nadu, India. 2,3,4*UG Student, Department of Civil Engineering, Dr.N.G.P.Institute of Technology, Coimbatore, Tamilnadu, India. --------------------------------------------------------------------*** ---------------------------------------------------------------------Abstract - The main component of preparing concrete, does not need the presence of Portland cement as a binder. contributes significant amount of greenhouse gas, because the Fly ash-based concrete has excellent compressive strength, production of one ton of Portland cement releases about one suffers very little drying shrinkage low creep, excellent ton of carbon dioxide gas into the atmosphere. Therefore, the resistant to sulphate attack and good acid resistance. Given introduction of a novel binder called 'geopolymer' by the fact that the fly ash is considered as a waste material, the Davidovits promises a good prospect for application in the fly ash based geo-polymer is therefore somehow cheaper concrete industry as an alternative binder to Portland cement. than the OPC concrete. Moreover, reduction of one tone of In terms of decreasing the global warming, the geopolymer CO2 yields one tone of carbon credit. This carbon credits technology can be decrease the CO2 emission to the significantly adds to the economy offered by the atmosphere caused by cement and aggregates industries by Geopolymer. "Fly ash” is preferred as a source material 80%. Inspired by this novel technology and the fact that fly ash because the presence of calcium in high amount may and silica fume is a waste material and fully available, an interfere with the polymerization process and alter the attempt has been taken to develop an alternative concrete microstructure. binder by applying the geopolymer technology and utilizing fly ash and silica fume as the source material to prepare the Fly 1.2 Scope and objective Ash-Based Geopolymer Concrete. The early work on fly ashbased geopolymer concrete concerning with the ➢ To modify/improve the concrete properties by manufacturing process and the effect of curing time, curing using mineral admixture like Fly ash, Metakaolin, temperature and the age of concrete on the compressive Lime, Silica Fumes. strength of fly ash-based geopolymer concrete. Moreover, the ➢ To conduct various tests on concrete as per IS code effect of alkaline ratio and the ratio of alkaline to water was to find its properties. also studied. the results on the factors affecting the compressive strength and other properties of fresh and ➢ To provide low carbon Geo-polymer concrete with hardened fly ash-based geopolymer concrete Attempts to advantages like fire proof, eco-friendly, low apply this material as a structural material have geopolymer permeability. concrete beams and columns been taken by studying the ➢ To find its excellent properties within both acid and behavior and strength of reinforced fly ash-based geopolymer salt environments concrete beams and columns. This paper presents the study on fly ash-based geopolymer concrete, mix design is focused for 2. LITERATURE REVIEW three grades i.e. low, medium and higher grades have been arrived and tested for compressive strength. Abhilash P et al. (2006) has done a study on effect of fly ash (FA) and ground granulated blast furnace slag Key Words: Fly ash, polymerisation, silica fume, alkaline (GGBS) on the mechanical properties of geopolymer solution, green concrete. concrete (GPC) when they were replaced for cement at different replacement levels (FA50-GGBS50,FA75-GGBS25, 1. INTRODUCTION FA100-GGBS0) using sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solutions as alkaline activators. 1.1 General Specimens were casted and cured for different curing periods like 7, 14, 28, 56 and 112 days at ambient room Geo-polymer is a type of amorphous alumina- temperature to determine the mechanical properties of silicate cementations material. Geo-polymer can be geopolymer concrete. Test results shows that as the synthesized by poly condensation reaction of geo-polymeric percentage of GGBS in the mix is increasing, mechanical precursor, and alkali poly silicates. Comparing to Portland properties such as compressive strength, split tensile cement, the production of geo-polymers has a relative higher strength and flexural strength were increasing. strength, excellent volume stability, better durability. Geopolymer concrete based on pozzolana is a new material that