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江河中的水工混凝土,石灰的溶蚀是普遍的,因此研究混凝土的溶蚀,具有实际的意义。矽酸盐水泥在水化后,产生大量的氢氧化钙,在28天龄期中,所产生石灰数量约占水泥重量10～15％①。处在软水中的混凝土,石灰逐渐向表面层扩散,不断溶解,结果使混凝土逐渐毁坏②。这一类型的侵蚀比较普遍,有许多工作者进行这方面的研究。苏联的斯多尔尼柯夫③,用电子显微镜研究水泥的水化过程,指出水泥石中的Ca(OH)_2,粒径0.5～1.0μ,漫布在难溶性的铝酸盐和矽酸盐结构网中。但是,直到如今,关于在多孔性介质中,溶质溶解过程的机构的研究,都是很少。
River concrete, lime erosion is common, so the study of concrete erosion, with practical significance. Portland cement produces a large amount of calcium hydroxide after hydration, and the amount of lime produced in the 28-day period accounts for about 10 to 15% by weight of the cement. In the soft water of concrete, lime gradually spread to the surface layer, continue to dissolve, as a result, the concrete gradually destroyed ②. This type of erosion is more common and many workers conduct research in this area. Sordolnikov of Soviet Union ③, studied the hydration process of cement by electron microscope, pointed out that Ca (OH) _2 in cement stone has particle size of 0.5-1.0μ, diffused in insoluble aluminate and silicate Salt structure network. However, until now, there have been few studies on the mechanism of solute dissolution in porous media.