Study on the Measurement of Autogenous Shrinkage of High Performance Concrete

Abstract

Based on the review of the relative literatures, the discrimination as well as the relation of the definitions between the autogenous shrinkage, self-desiccation shrinkage and chemical shrinkage of the concrete were discussed from the point of view of their definitions. An automatic autogenous shrinkage measuring system was developed, which adopted the combination of non-contact sensor as well as micrometer and perpendicular as well as horizontal measurement in the different stages of the structure evolution of concrete. The measurement can be start after casting.The measured results are consistent with the definition and the repeated measurements agree very well.