目前,在我国高层住宅建设中预制外墙板应用较多。预制外墙板工程施工速度快、效率高,不仅可提高工业化程度,缩短建设周期,而且还可大量减少现场湿作业,改善操作环境。可是外墙板的板缝如果防水处理不当,就会出现渗漏,给用户造成很大困难。我国预制钢筋混凝土外墙板的防水通常采用构造防水和材料防水。所谓材料防水,即利用密 At present, more prefabricated exterior wallboards are used in the construction of high-rise residential buildings in China. The prefabricated exterior wallboard construction has high construction speed and high efficiency, which can not only increase industrialization, shorten the construction period, but also greatly reduce on-site wet operations and improve the operating environment. However, if the watertight treatment of the panel of the external wall board is improper, leakage will occur, causing great difficulties to the user. Waterproofing of prefabricated reinforced concrete exterior wallboards in China is usually waterproof construction and waterproof material. The so-called material waterproof, that is, the use of dense