三元膨胀型混凝土防水剂的研究

按照砼防水剂国标规定的测试方法，对减水剂－胶态膨胀剂－晶态膨胀剂系统的三元复合膨胀型砼用防水剂进行了研究。研究表明：胶态膨胀剂的掺入能明显地　提高砼的抗渗性，降低砼的强度；共同掺入胶态与晶态膨胀剂，砼的抗渗性明显地提高，强度无明显的降低，而且具有补偿收缩的微膨胀性；掺三元膨胀型防水剂的砼，抗渗标号达到Ｓ３０；确定了三元复合膨胀型砼用防水剂的最佳配比。

Research on Ternary Expansive Waterproofing Admixture

Measuring methods of chinese standard on waterproofing admixture for concrete have been employed in this research on ternary expansive waterproofing admixture for water tight concrete in water reducer-colloidal-crystal expansion admixture system. It has been observed that: first, the permeability and the strength of concrete are reduced evidently by adding colloidal expansion admixture only; second, by adding.both colloidal and crystal expansion, the permeability is reduced more evidently than the former, the strength is remained stable,and the shrinkage compensating expansion is developed; third, the impermeability pressure for concrete adding the ternary expansive waterproofing admixture can reach 3.0 MPa. Besides, the optimized ratio for concrete using the ternary expansive waterproofing admixture has been determined.