Research on the influence of the substitution of normal aggregate by light weight aggregate on the strength and elastic modulus of concrete

Abstract：By mixing lightweight aggregate and normal aggregate, the performance of concrete is optimized and has a preferable prospect in application. In the article, the rule of the strength and elastic modulus of concrete affected by lightweight aggregate replacing normal aggregate is studied, and the quantitative relation between the replacing rate of lightweight aggregate, the bulk volume and elastic modulus of concrete is confirmed, the influence of lightweight aggregate replacing normal aggregate on limiting strain of concrete is explored, and the technological route by mixing different kinds of aggregates is put forward for controlling the elastic modulus of concrete, improving the limiting strain and tensile strength of concrete. The result has offered a helpful reference for the study on new_type high_performance lightweight concrete.

Keyword：lightweight aggregate replacing;elastic modulus;tensile strength;