• Palash Godani
• Dr. R. K. Dixit

Concrete holds unique position among all the modern construction material in which cement plays a major role as binding material. The production and consumption of cement is increasing day by day due to heavy demand of infrastructure development. Heavy production of cement is a matter of concern for environment as carbon footprints are increasing due to emission of CO2. Civil engineering researchers are continuously striving to explore the alternative material which may replace the cement without compromising the quality aspects. In recent past many waste pozzolanic materials such as fly ash, blast furnace slag from different industries, bagasse from sugar industries and waste paper sludge ash from paper industries were used in concrete which gives out satisfactory results, similarly other agricultural waste such as rice husk ash has also been used. So concerning about the environment to decrease the carbon footprints fly ash was used as the replacement of cement which is byproduct from burning pulverized coal in electric power generating plants. Fly ash exhibits pozzolanic properties as it contains alumino-silicate components in which binding property was activated by using chemical additives (Sodium Hydroxide Flacks and Sodium Silicate Solution). This research work defines the full replacement of cement content by varying proportion of fly ash and chemical additives as 15% of chemical additives replaced by 15% fly ash by weight, 20% of chemical additives replaced by 20 % fly ash by weight and 25% of chemical additives replaced by 25% fly ash by weight in concrete to form geopolymer concrete. Geopolymer concrete results from the reaction of a source material that is rich in silica and alumina with alkaline liquid. Various tests performed for properties of fresh and harden concrete. Compressive strength of concrete cubes with proposed replacement was determined after 3, 7 and 28 days of curing. The results indicate that the compressive strength of geopolymer concrete (75% fly ash + 25% chemical additives) was found to very high as compared to conventional concrete and the workability of geopolymer concrete was very high as compared to conventional concrete.

Concrete, Geopolymer Concrete, Fly ash, Cement, Chemical Additives, Compressive Strength, Environment, CO2, Carbon footprints

"Experimental Investigation for Comparative Analysis of Properties of Concrete by Replacing 100% Cement with Fly Ash by Using Chemical Additives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.1012-1023, September-2018, Available :http://www.jetir.org/papers/JETIR1809800.pdf

"Experimental Investigation for Comparative Analysis of Properties of Concrete by Replacing 100% Cement with Fly Ash by Using Chemical Additives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp1012-1023, September-2018, Available at : http://www.jetir.org/papers/JETIR1809800.pdf