新型水工混凝土表面防护涂层抗冻融性能研究  

Study on freeze-thaw resistance property of new surface protective coatings of hydraulic concrete

作　　者：梁慧[1,2,3,4] 汪在芹[2,3,4] 李珍[2,3,4] 

机构地区：[1]河海大学水利水电学院,江苏南京201198 [2]长江水利委员会长江科学院,湖北武汉430010 [3]国家大坝安全工程技术研究中心,湖北武汉430010 [4]三峡地区地质灾害与生态环境湖北省协同创新中心,湖北宜昌443000

出　　处：《人民长江》2015年第22期79-82,共4页Yangtze River

基　　金：水利部公益性行业专项"西部高寒地区水利工程劣化防护措施研究"(201301023);中央高校基本科研业务费专项资金资助项目"西部高寒地区聚脲类水工混凝土防护涂层的劣化及防护机理"(2014B37314);科技部国际科技合作计划专项"水工新型防护涂层材料制备与应用的合作研究"(2010DFB70470)

摘　　要：西部高寒地区地理位置独特,水文地质气候条件复杂,自然环境恶劣,造成该区域内水利工程混凝土材料易发生冻融劣化破坏。对此,选取课题组已研发的3种新型水工混凝土表面防护涂层材料(耐候型环氧涂层、不饱和聚酯树脂和聚脲涂层体系),进行室内加速冻融试验。试验结果表明,以环氧胶泥为底漆,聚脲材料为面漆的水工混凝土表面防护涂层的抗冻性能最优。随后在西藏地区水利水电工程进行了现场生产性试验,通过观测发现,新型聚脲材料起到了很好的抗冻防护效果。该材料有望应用于西部高寒地区水工建筑物的表面防护,提高水利水电工程建筑物的耐久性。The geographic position of alpine-cold region of west China is unique, the hydrological conditions and climatic conditions are complex and the natural environment there is harsh, therefore the freeze-thaw damage of the concrete materials occurs frequently. Freeze-thaw resistance property tests were conducted for three newly-developed surface protective coating materials of hydraulic concrete, namely the weathering epoxy coating, unsaturated polyester resin and polyurea coating system. The freeze-thaw resistance property of the polyurea coating system, using epoxy mortar as primer, polyurea material as paint, has the best effects under indoor accelerated freeze-thaw tests. And it is proved by the field production test that the material can protect the hydraulic concrete effectively in Tibet region, which is expected to be applied to the surface protection of hydraulic structures for improving the durability of water conservancy and hydropower projects in alpine-cold regions of west China.

关 键 词：水工混凝土 冻融循环 表面防护涂层 西部高寒地区 

分 类 号：TV431[水利工程—水工结构工程]