A Review on the Shrinkage Properties of Concrete and Influencing Factors

This paper provides a comprehensive review of the basic concepts of concrete shrinkage, including plastic shrinkage, temperature shrinkage, carbonation shrinkage, drying shrinkage, and autogenous shrinkage. It also discusses the causes, influencing factors, and control measures of these shrinkage types in detail. Among them, drying shrinkage, which is the most important volume stability deformation of concrete, has its mechanism deeply explored, including the theory of capillary tension, the theory of separation pressure, the theory of solid surface tension, and the theory of interlayer water loss. Additionally, this paper discusses and evaluates the current research on the drying shrinkage of mechanism sand concrete and its influencing factors, particularly the effects of stone powder and MB value (methylene blue value) on the drying shrinkage of mechanism sand concrete. Research indicates that in mechanism sand sand concrete, an appropriate stone powder content and optimized mix design can reduce the drying shrinkage of concrete and enhance the overall performance the concrete.