Expansion and Compressive Strength of Concrete with Expansive Additive

Abstract

This paper presents a study on expansion and compressive strength of concrete with expansive additive. In this research, the effect of amount of expansive additive (EA), type of binder, water to binder ratio, curing temperature, curing condition and restraining ratio on expansion and compressive strength of expansive concrete were studied. The results show that, expansive additive is more effective on free expansion and restrained expansion of fly ash concrete than concrete with other types of binders. Expansion of expansive concrete developed within 3 days, after that it is constant or reduces slightly due to shrinkage. Under free condition, when incorporating high EA content strength drop problem of expansive fly ash concrete is more severe than cement-only concrete. But this problem becomes less severe when concrete is restrained.