STRENGTH PROPERTIES OF FLY ASH AND GGBS BASED GEO POLYMER CONCRETE

The second most consumed product in the world is Cement. It contributes nearly 7% of the global carbon dioxide emission. Geopolymer concrete (GPC) is becoming a special type of more eco-friendly concrete alternative to Ordinary Portland Cement (OPC) concrete. This project mainly aims at the study of effect of class F fly ash (FA) and ground granulated blast furnace slag (GGBS) on the mechanical properties of geopolymer concrete (GPC) at different replacement levels (FA50-GGBS50, FA25-GGBS75, FA0-GGBS100) using Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solutions as alkaline activator. Specimens were cast and cured for different curing periods at ambient room temperature to determine the GPC mechanical properties viz. compressive, splitting tensile and flexural strength. Test results reveal that increase in GGBS replacement enhanced the mechanical properties of GPC at all ages at ambient room temperature.