| Sulfate Attack on Concrete in an Inland Salt Lake Environment |
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| 作者姓名： | 董荣珍 马保国 贺行洋 朱洪波 卫军 |
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| 作者单位： | School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China，Key Laboratory for Silicate Materials Science and Engineering Ministry of Education Wuhan University of Technology Wuhan 430070 China，Key Laboratory for Silicate Materials Science and Engineering Ministry of Education Wuhan University of Technology Wuhan 430070 China，Key Laboratory for Silicate Materials Science and Engineering Ministry of Education Wuhan University of Technology Wuhan 430070 China，School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China |
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| 基金项目： | This paper is supported by China Postdoctoral Science Foundation(No.2005038542)and National“973”Project(No.2001CB610704-3). |
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| 摘 要： | INTRODUCTIONSulfate attack is one of the reasons for concretestructures deteriorating earlier than usual,thusshowing poor durability.The SO42-from the sur-rounding environment such as ocean,saline,groundwater,and even the concrete itself,reacts with thehydration products of cement,whichleads to the de-terioration of the concrete(Li et al.,2000;Kang,1995;Neville,1983;Samarai,1976).The deteriora-tionincludes three processes:the external swelling,cracking,peeling,and disjointing caused by …
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| 关 键 词： | 盐湖 硫酸盐 环境条件 探测器 |
| 收稿时间： | 2006-06-28 |
| 修稿时间： | 2006-09-15 |
Sulfate Attack on Concrete in an Inland Salt Lake Environment |
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| Dong Rongzhen,Ma Baoguo,He Xingyang,Zhu Hongbo,Wei Jun.Sulfate Attack on Concrete in an Inland Salt Lake Environment[J].Journal of China University of Geosciences,2006,17(4):342-348. |
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| Authors: | Dong Rongzhen Ma Baoguo He Xingyang Zhu Hongbo Wei Jun |
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| Institution: | 1. School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China
2. Key Laboratory for Silicate Materials Science and Engineering,Ministry of Education,Wuhan University of Technology,Wuhan 430070,China |
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| Abstract: | Several cracks were found on the surface of the concrete foundations that support the steel towers of the Luohe -Huaiyang high-voltage electricity transmission line that is 20 years old and situated in an inland salt lake environment in North China. To analyze the deterioration mechanism that led to this condition, field investigations were carried out and several tests were conducted on the soil and the affected concrete, including XRD (X-ray diffraction), electric probe analysis, and chemical analysis. The results show that the concentration of sulfates is very high (0.39% wt.-0.67%wt.) in both the surrounding soil and the material around the coarse aggregates inside the concrete. Hence, sulfate attack could be one of the main causes of concrete deterioration. The percentage of sulfates in the surface layer of the concrete was higher than that in the inner layers of the concrete. The sulfates penetrate into the concrete and react with the hydrates of cement to form ettringite (AFt), which leads to increase in the volume and cracking of the concrete. |
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| Keywords: | concrete inland salt lake sulfate attack |
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