Study on the compressive strength of fly ash based geo polymer concrete

[摘要] Introduction of the alternative materials for complete replacement of cement in ordinary concrete will play an important role to control greenhouse gas and its effect. The 100% replacement of binder with fly ash (in integration with potassium hydroxide (koh) and potassium silicate (k2sio3) solutions) in concrete gives a significant alternative to conventional cement concrete. This paper focuses on the effect of alkaline solutions koh and k2sio3on strength properties of fly ash based geo polymer concrete (fgpc); compared the strength at different molarities of alkaline activator koh at different curing temperature. Fly ash based geo polymer concrete was produced from low calcium fly ash, triggered by addition of koh and k2sio3solution and by assimilation of superplasticizer for suitable workability. The molarities of potassium hydroxide as 8m, 10m and 12m molarities were used at various curing temperatures such as 60°c, 70 °c and 80°c. Results showed that for given proportion to get maximum compressive strength the optimum molarity of alkaline solution is 12m and optimum curing temperature is 70°c.

[发布机构] School of Civil and Chemical Engineering, VIT University, Vellore; Tamil Nadu; 632014, India^1

[效力级别] 工业技术

[关键词] Alkaline activators;Alkaline solutions;Alternative materials;Curing temperature;Low calcium fly ash;Maximum compressive strengths;Ordinary concretes;Potassium silicates