环氧涂层对混凝土抗氯离子渗透性能的影响  

Experimental Study on Chloride Permeability of Concrete Surface-Treated with Epoxy Resin

作　　者：张伟平[1] 管小军[2] 任佳俊[2] 顾祥林[1] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学材料科学与工程学院,上海200092

出　　处：《建筑材料学报》2008年第3期339-344,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50508028);教育部科学技术研究重点资助项目(105070)

摘　　要：分别采用氯离子快速渗透和吸水率试验来评价环氧树脂涂层后混凝土在饱水状态下抗氯离子渗透性能和非饱水状态下由浸湿过程中毛细吸附所引起的氯离子传输能力,并与有机硅、聚合物水泥基防水涂料及其复合涂层效果比较.试验结果表明,环氧树脂涂层能显著提高浸泡情况下混凝土抗氯离子渗透能力,其效果优于有机硅和聚合物水泥基防水涂料,虽然其降低干湿循环条件下的毛细吸附能力比有机硅稍差,但却明显强于聚合物水泥基防水涂料.At the same testing temperature,the deviations for repeated rapid permeation testing results of the same specimen keep less than 5%.Accordingly,it is derived that effect of surface treatment on chloride diffusion in concrete can be analyzed using comparative rapid permeation tests of concrete specimens before and after surface treatment with the same specimen.Diffusivity of saturated concretes surface-treated without and with epoxy resin was studied by rapid permeation test,while capillary absorption of non-saturated concrete specimens during wetting was determined by water absorption test.Effect of epoxy resin on diffusivity and capillary absorption has been compared with those of organo-silicone,polymer-cement-based waterproof coating or combination of two or three above materials.For saturated concrete,epoxy resin can reduce dramatically the diffusivity of chloride ions,with better effect than organo-silicone and waterproof coating.Capillary absorption and its induced chloride ion transport of non-saturated concrete during wetting are also decreased after surface-treatment with epoxy silicone,slightly higher than those with organo-silicone and significantlysly lower than those treated with waterproof coating.

关 键 词：表面处理 混凝土 氯离子 扩散 毛细吸附 

分 类 号：TU528.33[建筑科学—建筑技术科学]