• Shishir Singh
• Pushpendra kumar kushwaha
• Jiji M Thomas

Concrete is probably the most extensively material to used construction material in the world with about six billion tones being produced every year. Countries like India and China are facing problem of pollution due to large construction works in recent times. Ordinary Portland cement which is used in Concrete releases plethora of carbon dioxide (CO2) in atmosphere during manufacturing. This leads to increase of level of greenhouse gases and hence contributes in global warming. Material like Geo polymer concrete is best alternative for this problem.. Many researchers works for the reduction of cement consumption by partial replacement of cement by supplementary materials. These materials may be naturally occurring, industrial wastes or byproducts that are less energy intensive. These materials (called pozzalonas) when combined with calcium hydroxide, exhibits cementitious properties. Most commonly used pozzalonas are fly ash, silica fume, metakaolin, ground granulated blast furnace slag (GGBS). This Paper presents an experimental study of compressive , Split and flexural strength of concrete prepared with Ordinary Portland Cement, partially replaced by ground granulated blast furnace slag in different proportions varying from 0% to 50% of GGS Concrete for M20 and M30 grade of Concrete at room temperature for 7 ,14 and 28 day respectively . From the Experiment, I was found that Compressive strength and Flexural strength of GGBS concrete increased at 40 % of GGBS and further addition of GGBS, concrete showed marginal decrease in compressive Split and flexural strength.

Key word - Concrete, Durability, GGBS, Pozzalonas, Wastes, Silica fume, Sulphuric acid

"Experimental Study on Compressive Strength of M20 and M30 Concrete by Replacing GGBS against Cement", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.438-446, June 2019, Available :http://www.jetir.org/papers/JETIR1907I52.pdf

"Experimental Study on Compressive Strength of M20 and M30 Concrete by Replacing GGBS against Cement", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp438-446, June 2019, Available at : http://www.jetir.org/papers/JETIR1907I52.pdf