Experimental Study on Water-Plugging Performance of Grouted Concrete Crack
In this paper, ordinary Portland cement, ultrafine cement, polyurethane, and epoxy resin were selected as typical grouting materials. Grouting simulation tests were first conducted to prepare the grouted concrete crack sample. The effect of concrete crack parameters (i.e., crack aperture and roughne...
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2024-03-01
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| author | Lianzhen Zhang Changxin Huang Zhipeng Li Anni Wang Meng Gao Yang Gao Xiaochen Wang |
| author_facet | Lianzhen Zhang Changxin Huang Zhipeng Li Anni Wang Meng Gao Yang Gao Xiaochen Wang |
| author_sort | Lianzhen Zhang |
| collection | DOAJ |
| description | In this paper, ordinary Portland cement, ultrafine cement, polyurethane, and epoxy resin were selected as typical grouting materials. Grouting simulation tests were first conducted to prepare the grouted concrete crack sample. The effect of concrete crack parameters (i.e., crack aperture and roughness), grout water–cement ratio, and grouting pressure on the water-plugging performance of different grouting materials was explored through the impermeability test. The microstructure of grouted concrete cracks was analyzed by means of scanning electron microscopy (SEM) and computed tomography (CT), and the difference in water-plugging performance of different grouting materials was explained at the micro level. The results show that the impermeability of the four grouting materials was ranked as follows: Epoxy resin > polyurethane > ultra-fine cement > ordinary Portland cement. The concrete cracks grouted by epoxy resin have the highest plugging failure water pressure and the lowest permeability, which is the optimal grouting material. The effectiveness of crack grouting in water-plugging was directly proportional to the grouting pressure, provided the pressure did not exceed a certain value. When the pressure surpassed the threshold, the increase in pressure did not have a significant impact on the water plugging performance. For the two cement-based materials, the threshold pressure was 1 MPa, while for the other two chemical grouts, it was 2 MPa. The two cement-based grouts with a water–cement ratio of 0.8 showed optimal water-plugging performance. The water-plugging performance of ordinary Portland cement paste, ultra-fine cement pastes, and polyurethane grout was negatively correlated with crack aperture and positively correlated with crack roughness. However, the water-plugging performance of epoxy resin grout was not affected by crack aperture or roughness. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T10:40:16Z |
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| spelling | doaj.art-8c32dc39e04c41ffb9c1321bc3c8043a2024-04-12T13:22:01ZengMDPI AGMaterials1996-19442024-03-01177156810.3390/ma17071568Experimental Study on Water-Plugging Performance of Grouted Concrete CrackLianzhen Zhang0Changxin Huang1Zhipeng Li2Anni Wang3Meng Gao4Yang Gao5Xiaochen Wang6College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaSchool of Civil Engineering, Shandong University, Jinan 250061, ChinaSchool of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaKey Laboratory of Large Structure Health Monitoring and Control, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaIn this paper, ordinary Portland cement, ultrafine cement, polyurethane, and epoxy resin were selected as typical grouting materials. Grouting simulation tests were first conducted to prepare the grouted concrete crack sample. The effect of concrete crack parameters (i.e., crack aperture and roughness), grout water–cement ratio, and grouting pressure on the water-plugging performance of different grouting materials was explored through the impermeability test. The microstructure of grouted concrete cracks was analyzed by means of scanning electron microscopy (SEM) and computed tomography (CT), and the difference in water-plugging performance of different grouting materials was explained at the micro level. The results show that the impermeability of the four grouting materials was ranked as follows: Epoxy resin > polyurethane > ultra-fine cement > ordinary Portland cement. The concrete cracks grouted by epoxy resin have the highest plugging failure water pressure and the lowest permeability, which is the optimal grouting material. The effectiveness of crack grouting in water-plugging was directly proportional to the grouting pressure, provided the pressure did not exceed a certain value. When the pressure surpassed the threshold, the increase in pressure did not have a significant impact on the water plugging performance. For the two cement-based materials, the threshold pressure was 1 MPa, while for the other two chemical grouts, it was 2 MPa. The two cement-based grouts with a water–cement ratio of 0.8 showed optimal water-plugging performance. The water-plugging performance of ordinary Portland cement paste, ultra-fine cement pastes, and polyurethane grout was negatively correlated with crack aperture and positively correlated with crack roughness. However, the water-plugging performance of epoxy resin grout was not affected by crack aperture or roughness.https://www.mdpi.com/1996-1944/17/7/1568geotechnical engineeringgrouted concrete crackwater plugging capacitygrouting materialmicrostructure |
| spellingShingle | Lianzhen Zhang Changxin Huang Zhipeng Li Anni Wang Meng Gao Yang Gao Xiaochen Wang Experimental Study on Water-Plugging Performance of Grouted Concrete Crack Materials geotechnical engineering grouted concrete crack water plugging capacity grouting material microstructure |
| title | Experimental Study on Water-Plugging Performance of Grouted Concrete Crack |
| title_full | Experimental Study on Water-Plugging Performance of Grouted Concrete Crack |
| title_fullStr | Experimental Study on Water-Plugging Performance of Grouted Concrete Crack |
| title_full_unstemmed | Experimental Study on Water-Plugging Performance of Grouted Concrete Crack |
| title_short | Experimental Study on Water-Plugging Performance of Grouted Concrete Crack |
| title_sort | experimental study on water plugging performance of grouted concrete crack |
| topic | geotechnical engineering grouted concrete crack water plugging capacity grouting material microstructure |
| url | https://www.mdpi.com/1996-1944/17/7/1568 |
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