| 许开成*,陈博群,陈梦成,阳翌舒.模拟酸雨腐蚀环境下掺锂渣钢筋混凝土偏心受压柱试验研究[J].实验力学,2018,33(4):641~648 |
| 模拟酸雨腐蚀环境下掺锂渣钢筋混凝土偏心受压柱试验研究 |
| Experimental investigation on lithium slag doped eccentrically loaded reinforced concrete column in a simulated acid rain corrosion environment |
| 投稿时间：2017-03-17 修订日期：2017-05-15 |
| DOI：10.7520/1001-4888-17-066 |
| 中文关键词: 锂渣 模拟酸雨 腐蚀 偏心受压柱 扫描电镜 |
| 英文关键词:lithium slag simulated acid rain corrosion eccentrically loaded column scanning electron microscopy (SEM) |
| 基金项目:国家自然科学基金项目(51468017, 51378206),江西省重大基金项目(20133BCB24008， 20143ACB20008) |
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| 中文摘要: |
| 为研究掺锂渣偏心受压混凝土柱在模拟酸雨环境下的侵蚀影响，对6根不同腐蚀周期和水泥取代率的钢筋混凝土柱进行偏压试验，得到了受压柱的横向应变、侧向挠度及极限承载力。利用扫描电镜技术对腐蚀后实验柱进行了微观结构观察，据此分析了各参数变化对掺锂渣偏压柱受力性能的影响。实验结果表明: 经过酸雨腐蚀，混凝土絮团状C-S-H凝胶逐渐被侵蚀，其致密结构变得松散而易被破坏，在宏观上表现为强度下降；随着腐蚀周期的增加，所有试件强度均逐渐降低，但锂渣混凝土柱具有更好的密实性和略高的承载力；锂渣混凝土与普通混凝土的破坏形态、荷载-变形曲线及发展规律相似；通过极限承载力的计算值与实验值对比，发现利用现行混凝土设计规范计算锂渣钢筋混凝土柱偏压承载力是可行的，计算结果偏于安全。 |
| 英文摘要: |
| In order to study the influence of simulated acid rain corrosion environment on lithium slag doped eccentrically loaded concrete column, eccentric compression experiment was carried out 6 specimens of reinforced concrete columns with different corrosion cycles and cement substitution rates. The transverse strain, lateral deflection and ultimate bearing capacity of tested columns were obtained. The microstructure of the corroded column specimen was observed by scanning electron microscope (SEM), based on this, the influence of parameter variation on the mechanical properties of lithium slag doped eccentrically loaded column was analyzed. Experimental results show that after acid rain corrosion, the concrete floc like C-S-H gel is gradually eroded, its compact structure becomes loose and easy to be destroyed, and the strength decreases macroscopically. With the increase of corrosion cycle, the strength of all specimens decreases gradually, but the lithium-slag doped concrete column has better compactness and slightly higher bearing capacity. Comparing lithium slag doped concrete with ordinary concrete, the failure patterns, load-deformation curve and evolution are all similar. Comparison between calculated and experimental values of ultimate bearing capacity, it is found that it is feasible to calculate the bearing capacity of lithium-slag doped reinforced concrete columns by using the current design code of concrete, and the calculated results are more safety. |
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