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Acid attack on hardened cement paste by acids forming low soluble calcium salts

机译:酸性侵蚀硬化水泥浆对,酸形成低可溶性钙盐

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Solutions of acids have very aggressive effect on the cement matrix in concrete.Aggressiveness of the solutions increases with concentration of an acid but also depends on the acid type.The corrosion effect of solutions of various types of acids and their mixtures on hardened cement pastes is described in the paper.The results confirmed, that the rate of corrosion of hardened cement paste in solutions of strong acids(HCl, HNO3)was faster than in solutions of weak acids.However, the rate of corrosion of hardened cement paste was lower in solutions of acids that produce low soluble calcium salts, because calcium salts filled the pores in the layer of corrosion products and thus increased its diffusion resistance.
机译:酸的溶液对混凝土的水泥基质具有非常激进的影响。溶液的一种浓度随酸的浓度而增加,而且取决于酸类型。各种类型酸溶液及其混合物对硬化水泥浆料的腐蚀效果是本文中描述了。结果证实,硬化水泥浆料腐蚀速率比弱酸溶液较快,无论何种外,硬化水泥浆料的腐蚀速率下降产生低可溶性钙盐的酸溶液,因为钙盐在腐蚀产物层中填充孔,因此增加了其扩散抗性。

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