Experimental Study on Shrinkage-compensating Concrete with CaO-based Expansive Agent

Abstract

In this study, shrinkage-compensating concrete mixtures were prepared with various amount of CaO-based expansion agent to investigate their workability, mechanical property and durability. The experimental results indicate that CaO-based Expansive Agent has little effect on the performance of the fresh concrete workability. The mechanical properties and durability have been affected by the boundary limitation conditions. Adding 20-25kg CaO-based expansive agent per cubic meter concrete in replacement of equal amount of cementitious materials or sand would effectively compensate the deformation induced by chemical shrinkage and drying shrinkage.