配制抗渗混凝土,主要靠控制骨料级配增加致密度、选择合适的水胶比、加入引气剂产生细小封闭气孔封闭渗透水路这三种基本方法;加入膨胀剂可使混凝土在凝结的过程中,发生微膨胀,起到补偿收缩作用,防止混凝土的收缩裂缝,还可提高混凝土的密实性,产生防水作用;掺膨胀剂配制抗渗混凝土,是一种补充加固方法。抗渗混凝土是否掺用膨胀剂,要结合图纸设计和工艺要求。 The preparation of impermeable concrete, mainly by controlling the aggregate gradation to increase the density, select the appropriate water-cement ratio, adding air-entraining agent to produce a small closed pore closed permeable water of these three basic methods; adding expanders can make the concrete during the condensation process In the occurrence of micro-expansion, play a role in compensatory contraction to prevent shrinkage cracks in concrete, but also improve the density of concrete, resulting in waterproofing; Admixture of expansive admixture of concrete, is a method of reinforcement. Impermeable concrete is mixed with expanders, drawing design and process requirements.