Research Progress of Superabsorbent Polymer Applied in the Field of Concrete Curing
Low water-cement ratio concrete,while possessing high performance,often has a dense structure and poor permeability,making it difficult for external curing water to penetrate.As a result,the internal relative humidity is low,leading to self-shrinkage and cracking of the concrete.In the case of concrete with a low water-cement ratio,where water exchange with the outside is difficult,super absorbent polymer(SAP)can be used as an internal curing agent to reduce early-stage self-drying and self-shrinkage of concrete and to inhibit cracking due to its excellent water absorption and retention properties.By reviewing the classification,synthesis,preparation,and water absorption mechanism of SAP,this article summarizes the current research status of SAP in the field of concrete internal curing.It focuses on the effects of SAP on the mechanical properties,durability,and shrinkage of concrete,and looks ahead to the research directions of SAP in the field of concrete internal curing.
superabsorbent polymerinternal curingperformance of concrete
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