Plastic shrinkage cracking of blended cement concretes in hot environments

摘要

This paper reports results of a study conducted to evaluate plastic shrinkage cracking of concrete made with varying dosages of several pozzolanic materials, such as sly ash (20, 30 and 40/100) silica fume (5, 10 and 15/100) and blast furnace slag (50, 60 and 70/100). These concrete specimens were exposed to hot-humid and hot-dry environ- ments. The effect of these environmental conditions on plastic shrinkage cracking was evaluated. The rate of water evaporation in the blended cement concrete specimens was noted to be more than that in tie plain cement concrete specimens.