| 韩铁林*,陈蕴生,师俊平,马文涛.化学腐蚀对混凝土材料力学特性影响的试验研究[J].实验力学,2014,29(6):785~793 |
| 化学腐蚀对混凝土材料力学特性影响的试验研究 |
| Experimental Study of the Influence of Hydrochemical Corrosion on Mechanical Characteristics of Concrete Materials |
| 投稿时间：2013-01-31 修订日期：2014-06-03 |
| DOI：10.7520/1001-4888-13-016 |
| 中文关键词: 砂浆 水化学腐蚀 孔隙率 腐蚀机理 |
| 英文关键词:mortar hydrochemical erosion porosity corrosion mechanism |
| 基金项目:国家自然科学基金(51269024)资助 |
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| 摘要点击次数: 1805 |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| Experimental study of mechanical characteristics of mortar samples subjected to hydrochemical erosion in different environments was carried out. The influence of pH values, concentration and hydrochamical composition of solution on corrosion of mortar specimen was analyzed;and the mechanism of hydrochemical erosion of mortar sample was explored. Experimental results show that under relatively closed environment condition, no matter what kind of hydrochemical solution, their pH values tend to alkaline with longer erosion time; at the same time, dissolved out Ca2+、Mg2+ ions present cumulative feature. Under the same conditions, the ion's composition of hydrochemical solution exerts different corrosion extents on mortar samples. Under acidic condition, the influence on physico-chemical characteristics of Na2SO4 solution mortar samples is larger than that of NaHCO3 solution; under neutral conditions, compared with pure distilled water, Na2SO4 solution exerts stronger erosion on mortar samples. |
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