The performance of cement-based materials was improved by using polymer shrinkage reducing and compac-ting agents.The effects of polymer shrinkage reducing and compacting agents on the impermeability,volume stability,crack resistance,sulfate corrosion resistance,and freeze-thaw cycle resistance of cement-based materials were studied.The morphology of the hydration products of the 28 day old net slurry was observed by scanning electron microscopy.The re-sults showed that compared to cement-based materials without the addition of 2％polymer shrinkage reducing compactor,the 28 day permeability height ratio of concrete was 27％,the permeability pressure ratio of mortar was 300％,the chlo-ride ion migration coefficient ratio of concrete decreased to 61％,the 28 day shrinkage ratio of concrete was 87％,the early crack resistance performance ratio of mortar could reach 76％,the compressive strength and corrosion resistance coeffi-cient ratio of KS150 concrete increased to 122％,and the frost resistance grade of concrete reached F300,The morphology of the hydration product of the purified slurry has been optimized,transforming from a loose cluster like structure to a dense cluster like structure.
polymer shrinkage reducing and compacting agentconcreteanti crack and waterproofanti erosion
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