Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack
In order to study the deterioration and mechanism of dry–wet cycles and sulfate attack on the performance of concrete in seaside and saline areas, the deterioration of compressive strength of concrete with different water cement ratios under different erosion environments (sodium sulfate soaking at...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/18/4095 |
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| author | Fang Liu Tonghuan Zhang Tao Luo Mengzhen Zhou Kunkun Zhang Weiwei Ma |
| author_facet | Fang Liu Tonghuan Zhang Tao Luo Mengzhen Zhou Kunkun Zhang Weiwei Ma |
| author_sort | Fang Liu |
| collection | DOAJ |
| description | In order to study the deterioration and mechanism of dry–wet cycles and sulfate attack on the performance of concrete in seaside and saline areas, the deterioration of compressive strength of concrete with different water cement ratios under different erosion environments (sodium sulfate soaking at room temperature and coupling of dry–wet cycling and sodium sulfate) was studied here. At the same time, ICT (industrial computed tomography) and NMR (nuclear magnetic resonance) techniques were used to analyze the internal pore structure of concrete under different erosion environments. The results show that the compressive strength under different erosion environments increases first and then decreases, and the dry–wet cycle accelerates the sulfate erosion. With the increase of dry and wet cycles, larger pores are filled with erosion products and developed into small pores in the early stage of erosion; in the later stage of erosion, the proportion of larger pores increases, and cracks occur inside the sample. In the process of sulfate soaking and erosion, the smaller pores in the concrete account for the majority. As the sulfate erosion continues, the <i>T</i><sub>2</sub> spectrum distribution curve gradually moves right, and the signal intensity of the larger pores increases. |
| first_indexed | 2024-03-10T16:18:35Z |
| format | Article |
| id | doaj.art-6e09c1e36d3c461ca825fafcd2ecf173 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:18:35Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6e09c1e36d3c461ca825fafcd2ecf1732023-11-20T13:50:12ZengMDPI AGMaterials1996-19442020-09-011318409510.3390/ma13184095Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate AttackFang Liu0Tonghuan Zhang1Tao Luo2Mengzhen Zhou3Kunkun Zhang4Weiwei Ma5Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaShaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaShaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaShaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaShaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaShaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an 710123, ChinaIn order to study the deterioration and mechanism of dry–wet cycles and sulfate attack on the performance of concrete in seaside and saline areas, the deterioration of compressive strength of concrete with different water cement ratios under different erosion environments (sodium sulfate soaking at room temperature and coupling of dry–wet cycling and sodium sulfate) was studied here. At the same time, ICT (industrial computed tomography) and NMR (nuclear magnetic resonance) techniques were used to analyze the internal pore structure of concrete under different erosion environments. The results show that the compressive strength under different erosion environments increases first and then decreases, and the dry–wet cycle accelerates the sulfate erosion. With the increase of dry and wet cycles, larger pores are filled with erosion products and developed into small pores in the early stage of erosion; in the later stage of erosion, the proportion of larger pores increases, and cracks occur inside the sample. In the process of sulfate soaking and erosion, the smaller pores in the concrete account for the majority. As the sulfate erosion continues, the <i>T</i><sub>2</sub> spectrum distribution curve gradually moves right, and the signal intensity of the larger pores increases.https://www.mdpi.com/1996-1944/13/18/4095concretedry–wet cyclesulfate attackcompressive strengthpore structure |
| spellingShingle | Fang Liu Tonghuan Zhang Tao Luo Mengzhen Zhou Kunkun Zhang Weiwei Ma Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack Materials concrete dry–wet cycle sulfate attack compressive strength pore structure |
| title | Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack |
| title_full | Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack |
| title_fullStr | Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack |
| title_full_unstemmed | Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack |
| title_short | Study on the Deterioration of Concrete under Dry–Wet Cycle and Sulfate Attack |
| title_sort | study on the deterioration of concrete under dry wet cycle and sulfate attack |
| topic | concrete dry–wet cycle sulfate attack compressive strength pore structure |
| url | https://www.mdpi.com/1996-1944/13/18/4095 |
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