STRENGTH AND DURABILITY STUDY ON COAL ASH-GGBS BASED GEOPOLYMER CONCRETE
Publication Date : 22/03/2019
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concrete is till now most fashionable material in construction industries and one of the most environmentally harmful materials. Due to environmental concerns of cement, there arises a strong need to make use of alternate technology which is sustainable. Geopolymer concrete (GPC) is an alternative material which can act as a binder by replacing cement. In this investigation analysis of the strength and durability on Coal ash and ground granulated blast furnace slag (GGBS) based geopolymer concrete. This paper mainly focuses on the strength and durability study on coal ash and GGBS based geopolymer concrete at different replacement levels (Coal ash20-GGBS20, Coal ash25- GGBS25, Coal ash30-GGBS30, Coal ash35-GGBS35) using Sulphonated Naphthalene Formaldehyde (SNF) and Styrene-Butadiene Rubber (SBR) polymer solutions. Specimens were cast and cured for different curing periods at 28 and 56 days and to determine the geopolymer concrete (GPC) mechanical properties viz., compressive, split tensile and flexural strength respectively in comparison with the control mix. The properties of concrete investigation include porosity, sorptivity, permeability and acid resistance test. The test results shows that strength is increasing with the increase of coal ash and GGBS up to optimum value beyond which strength value start decreasing with further addition of Coal ash and GGBS.
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