Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite
The effect of chemical corrosion and natural joints on the damage characteristics and strength of rock masses is highly important for the construction of rock engineering and energy extraction. Therefore, the intact granite is processed into prefabricated fissured granite specimens with a fissure an...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6649824 |
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| author | Fan Zhang Tao He JunjieKang Dawei Hu |
| author_facet | Fan Zhang Tao He JunjieKang Dawei Hu |
| author_sort | Fan Zhang |
| collection | DOAJ |
| description | The effect of chemical corrosion and natural joints on the damage characteristics and strength of rock masses is highly important for the construction of rock engineering and energy extraction. Therefore, the intact granite is processed into prefabricated fissured granite specimens with a fissure angle of 0°, 30°, and 45°. Chemical corrosion tests are then performed on the prefabricated fissured granites. The pH of the solution gradually becomes neutral; the mass loss of the granite specimens and the mineral compositions of the fissure surface are measured and analyzed. The scanning electron microscopy (SEM) and uniaxial compression tests are performed on the granite specimens after chemical corrosion. After chemical corrosion, the surface of the fissure becomes loose. The various mineral components of the specimens have been changed to different degrees or converted into other mineral components. The peak strength and elastic modulus of the prefabricated fissured granites with the three fissure angles present a clear decrease, as the time of chemical corrosion increases. The stress intensity factors at the fissured tip are also analyzed. The stress intensity factors of the specimens with a fissure angle of 0°, 30°, and 45° decrease from 0.017, 0.35, and 0.84 to 0.013, 0.30, and 0.74 MPa·m1/2, respectively, as the time of the chemical corrosion increases. And the chemical corrosion has the largest effect on the intensity factors of the specimens with a fissure angle of 45° among the three angles. These experimental results could improve the understanding of the long-term stability of underground engineering in the multifield coupling environment. |
| format | Article |
| id | doaj-art-852e4f384b3b4fa5972cb900507354df |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-852e4f384b3b4fa5972cb900507354df2025-08-20T03:37:12ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66498246649824Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured GraniteFan Zhang0Tao He1JunjieKang2Dawei Hu3School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaThe effect of chemical corrosion and natural joints on the damage characteristics and strength of rock masses is highly important for the construction of rock engineering and energy extraction. Therefore, the intact granite is processed into prefabricated fissured granite specimens with a fissure angle of 0°, 30°, and 45°. Chemical corrosion tests are then performed on the prefabricated fissured granites. The pH of the solution gradually becomes neutral; the mass loss of the granite specimens and the mineral compositions of the fissure surface are measured and analyzed. The scanning electron microscopy (SEM) and uniaxial compression tests are performed on the granite specimens after chemical corrosion. After chemical corrosion, the surface of the fissure becomes loose. The various mineral components of the specimens have been changed to different degrees or converted into other mineral components. The peak strength and elastic modulus of the prefabricated fissured granites with the three fissure angles present a clear decrease, as the time of chemical corrosion increases. The stress intensity factors at the fissured tip are also analyzed. The stress intensity factors of the specimens with a fissure angle of 0°, 30°, and 45° decrease from 0.017, 0.35, and 0.84 to 0.013, 0.30, and 0.74 MPa·m1/2, respectively, as the time of the chemical corrosion increases. And the chemical corrosion has the largest effect on the intensity factors of the specimens with a fissure angle of 45° among the three angles. These experimental results could improve the understanding of the long-term stability of underground engineering in the multifield coupling environment.http://dx.doi.org/10.1155/2021/6649824 |
| spellingShingle | Fan Zhang Tao He JunjieKang Dawei Hu Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite Geofluids |
| title | Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite |
| title_full | Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite |
| title_fullStr | Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite |
| title_full_unstemmed | Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite |
| title_short | Experimental Study on Influence of Chemical Corrosion on Mechanical Property of Fissured Granite |
| title_sort | experimental study on influence of chemical corrosion on mechanical property of fissured granite |
| url | http://dx.doi.org/10.1155/2021/6649824 |
| work_keys_str_mv | AT fanzhang experimentalstudyoninfluenceofchemicalcorrosiononmechanicalpropertyoffissuredgranite AT taohe experimentalstudyoninfluenceofchemicalcorrosiononmechanicalpropertyoffissuredgranite AT junjiekang experimentalstudyoninfluenceofchemicalcorrosiononmechanicalpropertyoffissuredgranite AT daweihu experimentalstudyoninfluenceofchemicalcorrosiononmechanicalpropertyoffissuredgranite |