In order to reduce the shrinkage rate and suppress the probability of concrete cracking,the improvement effect of high water absorbent resin on concrete shrinkage cracking was studied through experiments.Select two types of resins,single addition of acrylamide and acrylamide+acrylic acid composite,and verify the effects of resin type and dosage on compressive strength and internal humidity.Determine the effect of resin dosage on concrete shrinkage through experiments,as well as the inhibitory effect of resin on concrete cracking after different temperature treatments.The experimental results show that the water absorption rate of the high water absorbent resin mixed with acrylamide and acrylic acid is higher,which can significantly improve the compressive strength of concrete.The humidity of concrete prepared with a single addition of acrylamide resin will significantly increase with the increase of curing time,but the humidity of concrete mixed with acrylamide and acrylic acid resin will remain stable.The concrete shrinkage is the smallest when the dosage of acrylamide+acrylic acid composite high water absorbent resin is 0.4％,and the resin can also inhibit concrete cracking to a certain extent in high temperature environments at this dosage.
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