Effects of artificial lightweight aggregate on autogenous shrinkage of concrete

Factors influencing autogenous shrinkage of lightweight aggregate concrete, such as the type, moisture content, and unit quantity of artificial lightw eight aggregate, have been studied experimentally. It was found that the au togenous shrinkage of concrete is reduced by using lightweight aggregate an d that the autogenous shrinkage of lightweight aggregate concrete decreases with increasing moisture content and unit quantity of lightweight aggregat e. These observations suggests that water lost internally by self-desiccati on of cement paste is replaced by moisture from the lightweight aggregate. (C) 1999 Elsevier Science Ltd. All rights reserved.