水工混凝土抗冻融涂层材料的研究与应用  

Research and Application of Freeze-Thaw Resistance Coating for Hydraulic Concrete

作　　者：肖承京[1,2] 陈亮[1,2] 肖长伟 汪在芹[1,2] 崔同欢[4] 

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]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443002 [3]西藏自治区水利电力规划勘测设计研究院,西藏拉萨850000 [4]华能西藏发电有限公司藏木水电分公司,西藏加查856417

出　　处：《水力发电》2016年第5期25-28,共4页Water Power

基　　金：水利部公益性行业专项(201301023);中国华能集团公司科技项目(HNKJ15-H14);国家自然科学基金资助项目(51378078);国际科技合作项目(2010DFB70470);科技部科研院所技术开发专项资金资助项目(2011EG136224);中央级科学事业单位基本科研业务费项目(CKSF2014051/CL;CKSF2012051/CL)

摘　　要：西藏地区高频率的冻融循环极易造成水工混凝土的冻融破坏,严重影响工程服役安全。根据水工混凝土冻融破坏机理,研发了具有良好抗渗性和耐老化性能的混凝土抗冻融防护涂层,其可有效阻隔外界水侵入,减少混凝土孔隙含水量,抑制混凝土的冻融破坏过程。该涂层以高强度树脂材料为底涂,能修补混凝土表面缺陷,并提供与面层的良好粘接,面层材料为高耐候聚脲防水涂层。研究发现涂层防护下的混凝土试样抗冻融性能优于F300。Because of high frequency freezing-thawing cycles in Tibet, the hydraulic concrete is easily to be destroyed which seriously affecting the safety of concrete structures. In connection with the freeze-thaw damage mechanism of hydraulic concrete, a freeze-thaw protective coating of concrete with good impermeability and resistance to aging properties is developed.The coating can effectively resist the outside water into the interior of concrete and reduce pore water content, which will inhibit the process of freeze-thaw damage of concrete. The coating includes a high-strength resin primer which can repair surface defects of concrete and provide good adhesion to the surface layer. The surface layer of coating is a polyurea waterproofing coating, which has high weathering resistance. The laboratory study finds that the concrete specimens with protective coating can undertake freeze-thaw cycles more than F300.

关 键 词：水工混凝土 抗冻融 聚脲涂层 西藏 

分 类 号：TV46[水利工程—水工结构工程]