聚氨酯(氰凝)在水利水电工程中的应用

Application of polyurethane in hydro-engineering

简述了氰凝的结构和反应原理。氰凝被灌到地下或含水的混凝土中时 ,迅速与水反应 ,形成不溶于水、不透水体型结构的凝胶体 ,并且体积膨胀 6～ 9倍 ,形成二次渗透 ,达到堵水、补强的作用。通过试验 ,分析了氰凝浆液的物理性质和化学性能 ,为浆液配制提供了依据。工程实例表明 ,采用氰凝灌浆处理 。

When polyurethane is poured into underground or concrete containing water, it quickly reacts with water and forms a gel which is a configuration structure not soluble in water and impervious,during consolidation its volume increases 5-6 times over the original,at that time,forming secondary permeation so as to enhance the effect of watertight and reinforcement.The structure of polyurethane and its reaction principle are briefly represented in the paper.By means of tests,the physical and chemical properties are analysed.A sound basis is provided for the preparation of slurry.Engineering illustrations indicated that to adopt polyurethane as a grouting material a better effect may be achieved.