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模拟酸雨腐蚀环境下锂渣钢筋混凝土偏压柱试验研究
Experimental research about lithium slag reinforced concrete eccentric compression column under simulated acid rain environment
投稿时间: 2017-03-17  最后修改时间: 2017-05-15
DOI:
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  eccentric compression column  scanning electron microscopy
基金项目:国家自然科学基金项目,江西重大基金项目
作者单位E-mail
许开成 华东交通大学 505958373@qq.com 
陈博群 华东交通大学 1512822421@qq.com 
陈梦成 华东交通大学  
阳翌舒 华东交通大学  
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中文摘要:
      为研究掺锂渣混凝土偏心受压柱在模拟酸雨环境下的侵蚀规律,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。得到了偏压柱的横向应变、侧向挠度及极限承载力,并利用SEM扫描电镜技术对腐蚀后试验柱进行了微观结构观察,据此分析了各变化参数对掺锂渣偏压柱受力性能的影响。试验结果表明: 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;通过对比极限承载力的计算值与试验值,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 lithium slag concrete eccentric compression column in the environment of simulated acid rain, Six reinforced concrete columns with different corrosion cycles and cement replacement rates were tested. Get the ultimate lateral strain, the lateral deflection and bearing capacity of columns, and observation the microcosmic structure on the corrosion test column by using SEM scanning electron microscope, analyzes the influence of various parameters on the stress performance of doped lithium slag columns. Experimental results show that, through the corrosion of acid rain, the C-S-H gel of the concrete was gradually eroded, Its compact structure becomes loose and easily destroyed, its strength decrease on the whole; With the increase of corrosion cycle, the strength of all specimens decreased gradually, but the lithium slag concrete column had better compactness and slightly higher bearing capacity; The failure mode, load deformation curve and development law of lithium slag concrete and ordinary concrete are similar; By comparing the calculation of the bearing capacity and the test bearing capacity, it is found that it is feasible to calculate the eccentric load bearing capacity of reinforced concrete columns by using the existing concrete design codes, the calculation result is partial to security.
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