单组份聚氨酯防水涂料性能研究及在猴子岩水电站的应用

发布时间：2018-04-16 11:34

本文选题：猴子岩水电站 + 单组份聚氨酯防水涂料　；参考：《水利水电技术》2017年05期

【摘要】：为了验证KLJ~?-P302s单组份聚氨酯材料作为坝面防水涂料的可靠性,参照猴子岩水电站坝面防水涂料的设计要求测试了其拉伸性能、粘结强度、抗渗压力、不透水性、离子渗透性、抗冻性及耐腐蚀性等指标。实验结果表明:未涂刷聚氨酯涂料的试件抗冻性经过100次冻融循环后显著劣化,涂刷聚氨酯涂料后经过300次冻融循环后未见混凝土有劣化趋势;涂刷单组份聚氨酯后,常温混凝土电通量从326C下降为0,隔绝了氯离子等侵蚀性介质锈蚀钢{o的通道,显著提升了混凝土及钢纤维的耐久性。实际应用表明,单组份聚氨酯涂层施工操作时间合理,涂料固化时间约2 h,避免了阳光曝晒导致溶剂急剧挥发形成鼓包和突然降雨冲击涂膜形成坑洞等病害。该材料在20 000 m~2的施工过程中表现出良好的施工性和合理的固化速度,充分证明了其是水工大坝防水涂料的优异选择。
[Abstract]:In order to verify the reliability of KLJ~?-P302s one-component polyurethane as the waterproof coating for dam surface, the tensile property, bond strength, impermeability, water permeability and ion permeability were tested according to the design requirements of the waterproof coating for dam surface of Xianyuan Hydropower Station.Freezing resistance and corrosion resistance.The experimental results show that the antifreezing property of the uncoated polyurethane coating is obviously deteriorated after 100 freeze-thaw cycles, and the concrete has no tendency to deteriorate after 300 freeze-thaw cycles.The electric flux of normal temperature concrete is reduced from 326C to 0, which insulates the channel of corroded steel {o, such as chloride ion, and improves the durability of concrete and steel fiber.The practical application shows that the operation time of the one-component polyurethane coating is reasonable and the curing time of the coating is about 2 hours, which avoids the diseases such as the sudden volatilization of the solvent caused by sunlight exposure and the formation of holes in the coating film by sudden rainfall impact.The material shows good constructability and reasonable curing speed in the construction process of 20 000 mm2, which fully proves that it is an excellent choice of waterproofing coating for hydraulic dams.
【作者单位】：江苏苏博特新材料股份有限公司;南京博特新材料有限公司;
【基金】：江苏省科技支撑计划项目基金资助(BE2014019)
【分类号】：TV44;TV543

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