Study on Strength Parameters of In-Situ Fly Ash Based GEO Polymer Concrete with Nitobond PVA

Abstract

Geo-polymer is an eco-friendly binding material alternative to ordinary Portland cement. Geo-polymer concrete is obtained by mixing the ingredients such as sodium hydroxide solution, sodium silicate solution, fly ash, and, fine aggregate (m-sand) and coarse aggregate. But in most of the literature they have carried out stream curing for initial and final strength. We are interested to know when the geo-polymer concrete is not steam cured or oven dried. Because due to less prefabricated structure in developing and underdeveloped country. Our aim is to research an alternative solution for 100% cement replaced, in-situ geo-polymer concrete. So, here we propose a research on 100% replacement of cement to fly ash and replace 100% river sand to M-sand. For achieving the binding property of geo-polymer concrete most of the literatures suggest to add sodium silicate and sodium hydroxide solution. We are adding the Nitobond PVA solution in addition to sodium silicate and sodium hydroxide solution to increase the strength of concrete. The samples are casted with Nitobond PVA agent in that we mix 2%, 4%, & 6% and cured by sunlight curing. Compressive strength, Tensile strength and young's modulus test are carried out to evaluate the behaviour of in-situ geo-polymer concrete.