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1980年我所通过选样试验选得一种新型水工混凝土外加剂-801引气剂(简称“801”)以来,经进行起泡性、表面张力、砂浆以及混凝土基本性能试验证明,这种外加剂能显著提高混凝土的抗冻融耐久性,对硬化混凝土的强度损失较小,干缩较少,现场应用操作方便,并能和常用减水剂复合使用。在此基础上,有关单位先后在丰满水电站溢流坝修补工程、北京
In 1980, I selected a new type of hydraulic concrete admixture -801 air-entraining agent (referred to as “801”) through the sample test for selection. Since blistering, surface tension, mortar and concrete basic performance tests have been conducted, Admixture can significantly improve the durability of concrete freeze-thaw resistance, the strength of the hardened concrete less dry shrinkage less, easy to operate on-site applications, and with the common use of water-reducing agent. On this basis, the relevant units at the Fengman hydropower station spill dam repair project, Beijing