硅烷防护对混凝土抗氯离子渗透性的影响

通过室内快速试验和实海暴露试验,研究硅烷防护对混凝土氯离子渗透性的影响。研究表明:硅烷浸渍层能够有效降低氯离子对混凝土的侵蚀,减小混凝土氯离子扩散系数和表面氯离子浓度,其中氯离子扩散系数降低幅度在50%以上,可显著提高混凝土结构使用寿命;且硅烷浸渍层能够减小处于干湿交替区域混凝土结构"对流层"的深度。

Effect of surface silane treatment on chloride ion penetration resistance of concrete

The effect of concrete surface hydropobation treatment against chloride penetration is studied by rapid test and in-site exposure test. It is shown that the silane impregnated layer can prevent the penetration of chlorides into the concrete substrate effectively and reduce the apparent chloride ion diffusion coefficient and surface chloride concentration; The apparent diffusion coefficient of surface treatment concrete can reduce by more than 50%, and improve the service life of concrete structure. Moreover, the depth of concrete convection zone can reduce due to silane impregnated layer for concrete in the marine environment of wetting and drying area.