Effect of Waste Kota Stone Powder on Properties of Fly Ash Based Geopolymer Concrete

Abstract

The demand of concrete is increasing day by day and cement is used for satisfying the need of development
of infrastructure facilities, 1 tone cement production generates 1 tone CO2, which adversely affect the environment. In
order to reduce the use of OPC and CO2 generation, the new generation concrete has been developed such as
Geopolymer Concrete. It uses Fly ash and Alkaline Solution as their binding materials Geopolymer requires oven curing
temperature 60°C for a period of 24 hours. The present work is to study the effect of waste Kota stone powder on Fly ash
based Geopolymer Concrete as partial replacement with fly ash. The alkaline solution used for present study is sodium
silicate (Na2SiO3) and 12M sodium hydroxide solution (NaOH) and various sodium silicate to sodium hydroxide ratio
2.0, 2.5 and 3.0. The casted cube and cylinder will be cured in oven heated at 60°C for 24 hours and to ascertain the
behavior of Geopolymer Concrete mixed with Kota stone powder as partial replacement at 0%, 5% and 10% with fly
ash, thereby measuring the influence of compressive strength after 7 days, 14 days, and 28 days of curing and split
tensile strength after 28 days of curing. Since the gained compressive strength of geopolymer concrete at 28 days was in
range of 38.7 MPa - 57.7 MPa and split tensile strength of geopolymer concrete at 28 days was in range of 2.18 MPa –
3.48 MPa which was maximum at sodium silicate to sodium hydroxide ratio 2.5 and replacement of kota stone powder
10%.