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氰凝是一种高效能的聚氨酯系化学灌浆材料。它由聚氨基甲酸酯低聚物和一些填加剂组成,遇水起化学反应而发气、膨胀,体系粘度增加,最终形成不溶不熔的凝胶体,从而起到防水堵漏、加固地基、稳定土壤的作用。氰凝能解决用一般方法难于奏效的问题,如混凝土工程的防水堵漏、构筑物的地基加固和复杂地层的稳定加固、自来水管的堵漏等,使用效果良好。天津某过河隧道漏水严重,1973年用这种材料处理后,至今完好;湖南风滩水库1982年用10吨氰凝处理坝基,
Cyanidation is a high-performance polyurethane chemical grouting material. It is composed of polyurethane oligomer and some additives. It reacts with water to generate gas and swell. The viscosity of the system increases. Finally, insoluble and infusible gels are formed, resulting in waterproof plugging and reinforcement. Foundation and stabilizing soil. Cyanidation can solve the problems that are difficult to achieve with general methods, such as the waterproof plugging of concrete works, the strengthening of foundations for structures, the stabilization and consolidation of complex strata, and the plugging of tap water pipes. The leakage of a certain cross-river tunnel in Tianjin was serious. After being treated with this material in 1973, it was still intact; Fengtan Reservoir in Hunan used 10 tons of cyanide coagulation to treat the dam foundation in 1982.