A STUDY OF MULTI COMPONENT ON BLENDED CONCRETE

Civil Engineering

This work presents a study on the behavior of concrete produced from multicomponent blended cements. These blends were prepared by blending 20–60% ASTM Type I cement with the combination of Class C fly ash and clean coal ash. Two percent to four percent sodium sulfate anhydrite was added to the blends as a chemical activator. Tests were conducted on the prepared concrete for strength development, freezing and thawing resistance, resistance to chloride ion penetration, sulfate resistance, and alkali silica reaction. Test results show that concrete produced from blended cements had equivalent or higher strength than the control mixture at all test ages. Blended cements were effective in controlling expansions due to sulfate attack or alkali silica reaction. They also reduced the deterioration of concrete due to freezing and thawing action and greatly increased the resistance to chloride ion penetration into the concrete. - Need of the hour is to obtain a concrete that gives high strength and better performance characteristics. Research is being carried out on a large scale to achieve the same. Concrete as we all know is widely used in the construction industry, not only for its strength but also due to its demands of high strength, high performance and high durability at desirable cost. And also at the same time, the demand for reducing the usage of cement quantity is also essential. This, to a certain extent is being carried out using pozzolanic materials which are used as a partial replacement of cement.

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