新型裂缝修补材料在大西海子水库除险加固工程的应用研究  

Research on the Application of New Crack Repair Materials in Reinforcement Project of Daxihaizi Reservoir

作　　者：周翔 ZHOU Xiang(Tarim River Basin Engineering Construction Department, Korla 841000, China)

机构地区：[1]塔里木河流域工程建设处,新疆库尔勒841000

出　　处：《中国水能及电气化》2021年第12期41-45,共5页China Water Power & Electrification

摘　　要：新疆地区水文地质条件特殊,处理位于冻融循环、离子侵蚀、干湿条件变化等复杂环境的病险水库水工建筑物裂缝异常困难。文章以硫铝酸盐水泥为主要基材,对掺入不同量分散性乳胶粉的裂缝修补材料性能进行了试验研究,结果表明:胶粉具有很强的亲水性,遇水乳化后可以覆盖在水泥颗粒表面,与水泥一起形成网架结构,从而延缓凝结时间,增加浆体稠度,增强抗折强度,提高耐磨损性,抗水渗、抗氯离子和抗盐冻的能力,同时能减少早期收缩变形产生的裂缝,但是过量的胶粉可能导致胶粉团聚现象,减少水化反应所需水分,影响后期强度发展,不能提供足够的刚性支撑。通过多项力学性能试验,认为胶粉掺量为1%时,裂缝修补材料的综合性能最佳。It is extremely difficult to deal with the cracks in the hydraulic structures of the dangerous reservoirs located in the complex environment of freezing-thawing cycle,ion erosion and changes in dry and wet conditions due to the special hydrogeological conditions in Xinjiang.Sulphoaluminate cement is adopted as the main base material in the paper.The properties of crack repair materials mixed with different amounts of dispersed latex powder is tested.The results show that:latex powder has strong hydrophilicity,it can be covered on the surface of cement particles after being emulsified with water.It can form a grid structure with cement together,thereby delaying the setting time,increasing the slurry consistency,enhancing the flexural strength,improving the wear resistance,resistance to water permeability,chloride ion resistance and salt frost resistance.It can reduce cracks caused by early shrinkage deformation at the same time.However,excessive latex powder may lead to latex powder agglomeration,thereby reducing the water required for hydration reaction,and affecting the later strength development.The structure can not provide enough rigid support.It is considered that the composite properties of crack repair material are the best when the latex powder content is 1%through a number of mechanical properties tests.

关 键 词：裂缝修补 除险加固 乳胶粉 

分 类 号：TV62[水利工程—水利水电工程]