Evaluate properties of fly ash based Geopolymer Bricks

In the recent years, study focus on the sustainable construction development. As the effect of greenhouse gases is increased more due to high range of CO2 emissions associated with manufacturing process of OPC. Hence, research studies the possibility of geopolymer manufacturing from fine fly ash (Class F) and Alkaline solution, then studied the hardened properties of fly ash bricks with addition of lime and gypsum. In this paper, we have studied the composition of high-strength fly ash-lime bricks using a fine pulverized fuel ash class-F. The purpose of this research is to evaluate properties of pulverized fuel ash based geopolymer brick along with its durability, the size of the brick is adopted as 230mm×110mm×70mm. The brick is casted with different percentages of Fly ash (5565%), M-sand (25-35%), Hydrated lime (5-15%) and Gypsum (3%). According to the various research, the optimum w/b ratio is to be taken as 0.35 and the temperature for curing is to be selected as normal room temperature. The tests on specimen to be conducted are a compressive strength, water absorption test, efflorescence test, impact test for various mixing proportions on respective curing period of 7 days,14 days and 28 days. From the results, the maximum optimized results are obtained for optimum mixing proportion of Fly ash-65%, Hydrated lime-12%, Gypsum-3%, M-sand -25%. KeywordsEvaluate, Properties, pulverized fuel ash, hydrated lime, gypsum, M-sand, geopolymer Bricks.