EXPANSION AND SHRINKAGE OF EXPANSIVE CONCRETE IN EARLY AGE

Abstract

The purpose of the present study is to investigate strain properties of expansive concrete in early age. The experimental parameters were mainly dosage of expansive admixture and environment in order to obtain each strain, i.e. expansion and shrinkage. This paper presents strain properties of expansive concrete by using the superposition method. The experimental results showed that expansions were hardly influenced by the environmental condition, and that drying shrinkages of concrete with or without expansive material were almost equal. Based on such obtained characteristics, strain behaviour of early-aged concrete with expansive material can be evaluated by superposition of expansion and shrinkage.