Influence of the Welding Degree on the Strength and Failure Modes of Tuff
The diagenesis of welded tuffs is a process in which volcanic debris undergoes degassing, compaction, and quenching, and vitreous rheologic, which indicates that the welding occurred in a high-temperature, high-pressure diagenetic environment and that different temperatures and pressures result in d...
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MDPI AG
2022-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/24/8757 |
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| author | Lihui Li Chenglong Li Beixiu Huang Ming Wang Zhida Bai Shengwen Qi |
| author_facet | Lihui Li Chenglong Li Beixiu Huang Ming Wang Zhida Bai Shengwen Qi |
| author_sort | Lihui Li |
| collection | DOAJ |
| description | The diagenesis of welded tuffs is a process in which volcanic debris undergoes degassing, compaction, and quenching, and vitreous rheologic, which indicates that the welding occurred in a high-temperature, high-pressure diagenetic environment and that different temperatures and pressures result in different degrees of welding in the welded tuffs, which can also result in differences in the mechanical properties of the rock. In this study, based on petrographic identification, mineral composition analysis, and pore structure characterization, uniaxial compression combined with linear accelerator CT and Brazilian splitting tests was carried out to investigate the influence of the welding degree on the strength and failure modes. The test results showed that although they had almost similar mineral composition and porosity, the uniaxial compression strength and tensile strength of the strongly welded tuffs were greater than that of the weakly welded tuffs. Their failure modes were also different. Fractures in the weakly welded tuffs developed gradually, while the strongly welded tuffs showed a higher brittleness with sudden failure. The results of this study shed light on the influence of the diagenetic environment on the mechanical properties of rock from a geological perspective and can provide a mechanical basis for rockfall risk evaluation in scenic areas of welded tuff. |
| first_indexed | 2024-03-09T16:10:10Z |
| format | Article |
| id | doaj.art-91252cc551d84dcc89a8173326410dee |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T16:10:10Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-91252cc551d84dcc89a8173326410dee2023-11-24T16:21:06ZengMDPI AGMaterials1996-19442022-12-011524875710.3390/ma15248757Influence of the Welding Degree on the Strength and Failure Modes of TuffLihui Li0Chenglong Li1Beixiu Huang2Ming Wang3Zhida Bai4Shengwen Qi5Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaShenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, ChinaSchool of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaThe diagenesis of welded tuffs is a process in which volcanic debris undergoes degassing, compaction, and quenching, and vitreous rheologic, which indicates that the welding occurred in a high-temperature, high-pressure diagenetic environment and that different temperatures and pressures result in different degrees of welding in the welded tuffs, which can also result in differences in the mechanical properties of the rock. In this study, based on petrographic identification, mineral composition analysis, and pore structure characterization, uniaxial compression combined with linear accelerator CT and Brazilian splitting tests was carried out to investigate the influence of the welding degree on the strength and failure modes. The test results showed that although they had almost similar mineral composition and porosity, the uniaxial compression strength and tensile strength of the strongly welded tuffs were greater than that of the weakly welded tuffs. Their failure modes were also different. Fractures in the weakly welded tuffs developed gradually, while the strongly welded tuffs showed a higher brittleness with sudden failure. The results of this study shed light on the influence of the diagenetic environment on the mechanical properties of rock from a geological perspective and can provide a mechanical basis for rockfall risk evaluation in scenic areas of welded tuff.https://www.mdpi.com/1996-1944/15/24/8757welding degreetuffmechanical propertystrengthfailure modediagenesis |
| spellingShingle | Lihui Li Chenglong Li Beixiu Huang Ming Wang Zhida Bai Shengwen Qi Influence of the Welding Degree on the Strength and Failure Modes of Tuff Materials welding degree tuff mechanical property strength failure mode diagenesis |
| title | Influence of the Welding Degree on the Strength and Failure Modes of Tuff |
| title_full | Influence of the Welding Degree on the Strength and Failure Modes of Tuff |
| title_fullStr | Influence of the Welding Degree on the Strength and Failure Modes of Tuff |
| title_full_unstemmed | Influence of the Welding Degree on the Strength and Failure Modes of Tuff |
| title_short | Influence of the Welding Degree on the Strength and Failure Modes of Tuff |
| title_sort | influence of the welding degree on the strength and failure modes of tuff |
| topic | welding degree tuff mechanical property strength failure mode diagenesis |
| url | https://www.mdpi.com/1996-1944/15/24/8757 |
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