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防水混凝土是以调整混凝土配合比、掺加外加剂或掺合料和使用膨胀水泥,提高混凝土自身的密实性、抗渗性,使其满足抗渗压力大于0.6MPa要求的不透水性混凝土。防水混凝土适用于防水等级为1-4级的地下整体式混凝土结构,不适用于环境温度高于80℃或处于耐侵蚀系数小于0.8的侵蚀性介质中使用的地下工程,抗渗等级不得小于P6。新规范对施工缝、抗渗试件、混凝土配合比的要求如下。
Waterproof concrete is to adjust the mix ratio of concrete, admixture admixture or admixture and the use of expanded cement, concrete to improve their own density, impermeability, to meet the anti-seepage pressure greater than 0.6MPa requirements of impervious concrete. Waterproof concrete is suitable for underground monolithic concrete structures with water-proof grade of 1-4 and is not suitable for underground works in corrosive media with ambient temperature higher than 80 ℃ or in erosion-resistant coefficient of less than 0.8, and the impermeability level shall not be less than P6 . The new code of construction joints, impermeability test pieces, concrete mix requirements are as follows.