| Evaluating Deterioration of Concrete by Sulfate Attack |
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| 引用本文： | 龙广成. Evaluating Deterioration of Concrete by Sulfate Attack[J]. 武汉理工大学学报(材料科学英文版), 2007, 22(3): 572-576. DOI: 10.1007/s11595-006-3572-6 |
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| 作者姓名： | 龙广成 |
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| 作者单位： | School of |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | Effects of factors such as water to cement ratio, fly ash and silica fume on the resistance of concrete to sulfate attack were investigated by dry-wet cycles and immersion method. The index of the resistance to sulfate attack was used to evaluate the deterioration degree of concrete damaged by sulfate. The relationship between the resistance of concrete to sulfate attack and its permeability/porosity were analyzed as well as its responding mechanism. Results show that the depth of sulfate crystal attack from surface to inner of concrete can be reduced by decreasing w/c and addition of combining fly ash with silica fume. The variation of relative elastic modulus ratio and relative flexural strength ratio of various specimens before and after being subjected to sulfate attack was compared.
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| 关 键 词： | 混凝土 硫酸盐 强度 动态弹性模量 渗透性 |
| 收稿时间： | 2006-03-31 |
| 修稿时间： | 2007-04-14 |
Evaluating deterioration of concrete by sulfate attack |
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| Long Guangcheng,Xie Youjun,Tang Xuguang. Evaluating deterioration of concrete by sulfate attack[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2007, 22(3): 572-576. DOI: 10.1007/s11595-006-3572-6 |
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| Authors: | Long Guangcheng Xie Youjun Tang Xuguang |
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| Affiliation: | (1) School of Civil Engineering and Architecture, Central South University, Changsha, 410075, China |
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| Abstract: | Effects of factors such as water to cement ratio,fly ash and silica fume on the resistance of concrete to sulfate attack were investigated by dry-wet cycles and immersion method.The index of the resistance to sulfate attack was used to evaluate the deterioration degree of concrete damaged by sulfate.The relationship between the resistance of concrete to sulfate attack and its permeability/porosity were analyzed as well as its responding mechanism.Results show that the depth of sulfate crystal attack from surface to inner of concrete can be reduced by decreasing w/c and addition of combining fly ash with silica fume.The variation of relative elastic modulus ratio and relative flexural strength ratio of various specimens before and after being subjected to sulfate attack was compared. |
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| Keywords: | sulfate attack strength relative dynamic elastic modulus permeability concrete |
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