STUDY ON COMPRESSIVE STRENGTH OF FLY ASH BASED AND GGBS BASED GEOPOLYMER CONCRETE

Abstract

Research for complete OPC free concrete is still evolving and there is a need for developing alternative binding agents which are environmentally friendly. One such alternative is identified to be geopolymer which often consists of fly ash, sodium silicate, and sodium or potassium hydroxide (NaOH or KOH). Since, many coal based power plants in India have been retiring due to thrust towards cleaner energy production and this may lead to scarcity of fly ash in future. The production of Ordinary Portland cement and the usage of normal river sand are increased due to the demand of concrete in construction Industries. The emission of CO2 increases during the production of cement and at the same time the availability of river sand is also becoming costlier and scarcity due to illegal dredging of river sand. Hence the objective of this study is to incorporate other Pozzolanic materials in geopolymer concrete. In line with objective two Pozzolanic material Fly ash (FA) and GGBS were used in geopolymer concrete. The compressive strength and workability were studied by using Fly ash and GGBS based geopolymer concrete for with and without using reinforcement cases. The results were compared with normal case.