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Effect of Silica Fume in Concrete

Vikas Srivastava, Alvin Harison ,P. K. Mehta, Atul ,Rakesh Kumar

Since advent of civilization various types of cementitous materials have been used for constructiuon practices. The arrival of Ordinary Portland Cement (OPC) changed the construction activities completely. However, because of several drawbacks associated with properties of cement and manufactured building materials usinf OPC as well as the cost factor attempts one mode to utilize other materials for economical constructions and improved mortar and concrete characteristics. Also, several waste materials are generated in huge quantities by different industrial activities. Now attempts were made to utilize these waste materials or industrial byproducts in construction activities to solve the environmental pollution problems, and safer and economical construction. Silica fume is one such industrial by product which is being used and experimented upon to obtain a stronger and durable concrete. It is one of the pozzolonas having very large surface area which results in better and uniform utilization of calcium hydroxide released during hydration of OPC. Also, because of its very fine size it act as filler material between the cement gell grains. This paper presents a review of silica fume utilization in concrete production and its effect on the concrete.