聚氨酯保温、保湿材料在高寒地区坝工混凝土工程中的应用

Application of Polyurethane as Heat and Moisture Preservation Material to Construction of Concrete Dam in Cold Regions

为了保证高寒地区坝工混凝土建筑物的质量与安全,防止混凝土产生温度裂缝及混凝土干缩裂缝,通常在混凝土表面覆盖必要的保温保湿材料进行防护。新疆冲乎尔水利枢纽采用在大坝及泄流底孔混凝土表面喷涂聚氨酯材料起到了良好的防护效果。

In order to ensure the quality and safety of concrete dam structures in cold region, and prevent the concrete e crack caused by temperature drop and desiccation fissure, the heat and moisture preservation materials were usually covered on the surface of concrete. The measure of spraying polyurethane materials was adopted at the concrete surface of bottom flood discharge tunnel in Chonghu＇er hydraulic key project in Xinjiang Municipality, which obtained excellent effect.