地下室底板聚氨酯涂膜防水施工时,是以垫层作为涂膜的基层。为满足基层含水率的要求,通常在完成垫层后进行一段较长时间的“晾底”,以使垫层的含水率降低。而在高地下水位地区,垫层经常处于返潮状态,在加强排降水的同时,“晾底”时间也要延长,这样做既增加了施工成本,又拖延了工期,而且垫层受地基土内的潮气影响,含水率得不到有效的控制,聚氨 Basement floor polyurethane coating film waterproof construction, is the cushion layer as a base film coating. In order to meet the requirement of the moisture content of the grass-roots layer, a “drying-off” is usually performed for a longer period of time after the mat is completed, so as to reduce the moisture content of the mat. In areas with high groundwater levels, the cushions are often in the state of wetlands. In addition to the enhancement of drainage, the “drying” time is also prolonged. This increases the construction cost, delays the construction period, and the cushion is protected by the foundation soil. Affected by moisture, water content is not effectively controlled, and polyamine