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对不同水化学环境腐蚀过程中砂浆试样物理力学性质进行了试验研究,分析了溶液pH值、浓度及水化学成分对砂浆的腐蚀程度,探讨了砂浆试样的化学腐蚀机制。试验结果表明:在相对封闭的环境条件下,无论是哪种水化学溶液,随着化学侵蚀时间的加长,溶液的pH值均趋于碱性;同时,溶出的Ca2+、Mg2+离子具有累积性特点。在其他条件相同的情况下,水化学溶液的离子成分对砂浆试样的腐蚀程度各不相同。酸性条件下,Na2SO4溶液砂浆试样物理化学性质的影响要比NaHCO3溶液大;中性条件下,与纯净的蒸馏水相比,Na2SO4溶液对砂浆试样的腐蚀作用要强一些。
The physical and mechanical properties of mortar samples during the corrosion of different water chemical environments were studied. The corrosion degree of the mortar was analyzed by pH value, concentration and the chemical composition of the water. The chemical corrosion mechanism of mortar samples was also discussed. The results show that under the relatively closed environment, no matter what kind of hydration solution, with the increase of chemical attack time, the pH of the solution tends to be alkaline. At the same time, the dissolved Ca2 + and Mg2 + ions have the characteristics of accumulation . Under other conditions the same, the chemical composition of the water ion corrosion of mortar samples vary. Under acidic conditions, the physicochemical properties of Na2SO4 solution mortar samples than NaHCO3 solution; Under neutral conditions, compared with pure distilled water, Na2SO4 solution on the corrosion of mortar samples stronger.