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以水溶性聚醚为基的聚氨酯浆液(以下简称WPU)中的水溶性聚氨酯:是聚氨酯化学的一个重要分支,在日本、联邦德国等国得到了发展,并广泛用于土木建筑工程的防水堵漏、大坝基础的灌浆和坝体混凝土裂隙的防渗和补强、隧道掘进和矿业建设中涌水地带的止水以及破碎带的加固、松软地层的加固等。一、WPU的特点 WPU除了具有一般化学浆液及油溶性聚氨酯浆液的特性外,还有以下几个特点: (1)WPU浆液在水中极易分散,并能与水反应生成乳白色的不溶于水的且富有弹性的凝胶体。当与20～30倍的水混合后仍能很好胶凝,在注浆工程中使用是经济的。 (2)WPU浆液的毒性极小,据国外
Water-soluble polyurethane in water-soluble polyether-based polyurethane slurry (hereinafter referred to as WPU): It is an important branch of polyurethane chemistry. It has been developed in Japan, the Federal Republic of Germany, and is widely used in waterproofing of civil engineering projects. Leakage, foundation grouting, seepage prevention and reinforcement of concrete cracks in dam body, tunneling and water stoppage in the mining area during mining construction, reinforcement of fracture zone, reinforcement of soft ground, etc. First, the characteristics of WPU In addition to the characteristics of WPU in general chemical slurry and oil-soluble polyurethane slurry, there are the following characteristics: (1) WPU slurry is easily dispersed in water, and can react with water to produce milky white insoluble And elastic gel. It can be well gelled after being mixed with 20-30 times of water and is economical to use in grouting. (2) WPU slurry toxicity is minimal, according to foreign