Physical sulfate attack on concrete lining–A field case analysis
In the tunnels of the Cheng-Kun Railway in China, concrete failure can usually be observed from the effect of sulfates. A field investigation was conducted to analyze the concrete damage mechanism by means of XRD, IC, AAS and EPMA. The results showed that (1) large amounts of Na2SO4 were generated o...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-06-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509517300360 |
| _version_ | 1811282088901476352 |
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| author | Zanqun Liu Fengyan Zhang Dehua Deng Youjun Xie Guangcheng Long Xuguang Tang |
| author_facet | Zanqun Liu Fengyan Zhang Dehua Deng Youjun Xie Guangcheng Long Xuguang Tang |
| author_sort | Zanqun Liu |
| collection | DOAJ |
| description | In the tunnels of the Cheng-Kun Railway in China, concrete failure can usually be observed from the effect of sulfates. A field investigation was conducted to analyze the concrete damage mechanism by means of XRD, IC, AAS and EPMA. The results showed that (1) large amounts of Na2SO4 were generated on the surface layer of the concrete lining, causing concrete detachment layer by layer; (2) the concrete lining in contact with air had been neutralized to more than 50 mm in depth, and the cement hydration products had been converted into CaCO3; (3) ettringite and gypsum, the products of chemical sulfate attack, were also detected in the neutralized concrete lining. This analysis of a field case concluded that Na2SO4 crystallization caused the detachment of the surface layer of the concrete lining, and the chemical sulfate attack occurred in the inner part of the concrete lining. |
| first_indexed | 2024-04-13T01:45:19Z |
| format | Article |
| id | doaj.art-904dacc1aaf441faac74148158635762 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-13T01:45:19Z |
| publishDate | 2017-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-904dacc1aaf441faac741481586357622022-12-22T03:08:03ZengElsevierCase Studies in Construction Materials2214-50952017-06-016C20621210.1016/j.cscm.2017.04.002Physical sulfate attack on concrete lining–A field case analysisZanqun Liu0Fengyan Zhang1Dehua Deng2Youjun Xie3Guangcheng Long4Xuguang Tang5School of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaSchool of Civil Engineering, Central South University, Changsha, Hunan, 410075, ChinaIn the tunnels of the Cheng-Kun Railway in China, concrete failure can usually be observed from the effect of sulfates. A field investigation was conducted to analyze the concrete damage mechanism by means of XRD, IC, AAS and EPMA. The results showed that (1) large amounts of Na2SO4 were generated on the surface layer of the concrete lining, causing concrete detachment layer by layer; (2) the concrete lining in contact with air had been neutralized to more than 50 mm in depth, and the cement hydration products had been converted into CaCO3; (3) ettringite and gypsum, the products of chemical sulfate attack, were also detected in the neutralized concrete lining. This analysis of a field case concluded that Na2SO4 crystallization caused the detachment of the surface layer of the concrete lining, and the chemical sulfate attack occurred in the inner part of the concrete lining.http://www.sciencedirect.com/science/article/pii/S2214509517300360Field casePhysical sulfate attackChemical sulfate attackConcrete |
| spellingShingle | Zanqun Liu Fengyan Zhang Dehua Deng Youjun Xie Guangcheng Long Xuguang Tang Physical sulfate attack on concrete lining–A field case analysis Case Studies in Construction Materials Field case Physical sulfate attack Chemical sulfate attack Concrete |
| title | Physical sulfate attack on concrete lining–A field case analysis |
| title_full | Physical sulfate attack on concrete lining–A field case analysis |
| title_fullStr | Physical sulfate attack on concrete lining–A field case analysis |
| title_full_unstemmed | Physical sulfate attack on concrete lining–A field case analysis |
| title_short | Physical sulfate attack on concrete lining–A field case analysis |
| title_sort | physical sulfate attack on concrete lining a field case analysis |
| topic | Field case Physical sulfate attack Chemical sulfate attack Concrete |
| url | http://www.sciencedirect.com/science/article/pii/S2214509517300360 |
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