Abstract
In this study the effect of drainage behavior on coarse aggregate to drying shrinkage of concrete was investigated in two experiments. In the first experiment the strain and weight of several kinds of coarse aggregate were measured in the conditions of six types of relative humidity and relationship between strain and drainage of coarse aggregate was obtained. In the second experiment drying shrinkage of concrete and strain of coarse aggregate inserted into the same concrete were measured and drainage rate of coarse aggregate inserted into concrete was presumed using the result of first experiment.
Comparing water vapor behavior of concrete with drainage behavior of coarse aggregate, it is clear that relationship between water vapor of concrete and drainage of coarse aggregate influences on drying shrinkage of concrete.
