Effect study of heat treatment on tensile properties of coarse sandstone
Abstract Brazilian split experiments were carried out on coarse sandstone, obtained from a coal seam roof passed by the Shihuoshan tunnel in Xinjiang, and treated at different temperatures (room temperature 25 °C and high temperature 100 °C ~ 900 °C). The physical and mechanical characteristics of t...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21164-w |
| _version_ | 1811250039795744768 |
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| author | Yushun Yang Sijiang Wei Jihua Zhang Jingke Wu Chunlei Zhang |
| author_facet | Yushun Yang Sijiang Wei Jihua Zhang Jingke Wu Chunlei Zhang |
| author_sort | Yushun Yang |
| collection | DOAJ |
| description | Abstract Brazilian split experiments were carried out on coarse sandstone, obtained from a coal seam roof passed by the Shihuoshan tunnel in Xinjiang, and treated at different temperatures (room temperature 25 °C and high temperature 100 °C ~ 900 °C). The physical and mechanical characteristics of the samples were studied. The results showed that: after heat treatment, the color of the coarse sandstone samples gradually changed from dark gray to brownish red-pink; the higher the treatment temperature was, the darker the sample color. Microcracks and mineral composition changes occured in the coarse sandstone samples after heat treatment, which decreased the longitudinal wave velocity of the samples. The longitudinal wave velocity of the coarse sandstone samples decreased as a quadratic function of the treatment temperature. With the increase in longitudinal wave velocity, the tensile strength of the samples first increased and then decreased, changing as a quadratic function relationship. After heat treatment, the tensile stress–strain curve of the coarse sandstone could be divided into compaction, elasticity, plasticity, and failure stages. The energy was continuously accumulated in the coarse sandstone before its failure, and it was released suddenly after the failure. With increasing treatment temperature, the cumulative energy in the prepeak stages first increased and then decreased, reaching a maximum value at 500 °C. The prepeak energy and tensile strength of the coarse sandstone samples satisfied a linear function fitting relationship, indicating that a higher tensile strength in the coarse sandstone, led to more accumulated energy in the samples. |
| first_indexed | 2024-04-12T15:58:12Z |
| format | Article |
| id | doaj.art-58275832d16443e4ac5820f8ebba7613 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T15:58:12Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-58275832d16443e4ac5820f8ebba76132022-12-22T03:26:18ZengNature PortfolioScientific Reports2045-23222022-10-0112111210.1038/s41598-022-21164-wEffect study of heat treatment on tensile properties of coarse sandstoneYushun Yang0Sijiang Wei1Jihua Zhang2Jingke Wu3Chunlei Zhang4Faculty of Architecture and Civil Engineering, Huaiyin Institute of TechnologySchool of Energy Science and Engineering, Henan Polytechnic UniversityFaculty of Architecture and Civil Engineering, Huaiyin Institute of TechnologyFaculty of Architecture and Civil Engineering, Huaiyin Institute of TechnologyFaculty of Architecture and Civil Engineering, Huaiyin Institute of TechnologyAbstract Brazilian split experiments were carried out on coarse sandstone, obtained from a coal seam roof passed by the Shihuoshan tunnel in Xinjiang, and treated at different temperatures (room temperature 25 °C and high temperature 100 °C ~ 900 °C). The physical and mechanical characteristics of the samples were studied. The results showed that: after heat treatment, the color of the coarse sandstone samples gradually changed from dark gray to brownish red-pink; the higher the treatment temperature was, the darker the sample color. Microcracks and mineral composition changes occured in the coarse sandstone samples after heat treatment, which decreased the longitudinal wave velocity of the samples. The longitudinal wave velocity of the coarse sandstone samples decreased as a quadratic function of the treatment temperature. With the increase in longitudinal wave velocity, the tensile strength of the samples first increased and then decreased, changing as a quadratic function relationship. After heat treatment, the tensile stress–strain curve of the coarse sandstone could be divided into compaction, elasticity, plasticity, and failure stages. The energy was continuously accumulated in the coarse sandstone before its failure, and it was released suddenly after the failure. With increasing treatment temperature, the cumulative energy in the prepeak stages first increased and then decreased, reaching a maximum value at 500 °C. The prepeak energy and tensile strength of the coarse sandstone samples satisfied a linear function fitting relationship, indicating that a higher tensile strength in the coarse sandstone, led to more accumulated energy in the samples.https://doi.org/10.1038/s41598-022-21164-w |
| spellingShingle | Yushun Yang Sijiang Wei Jihua Zhang Jingke Wu Chunlei Zhang Effect study of heat treatment on tensile properties of coarse sandstone Scientific Reports |
| title | Effect study of heat treatment on tensile properties of coarse sandstone |
| title_full | Effect study of heat treatment on tensile properties of coarse sandstone |
| title_fullStr | Effect study of heat treatment on tensile properties of coarse sandstone |
| title_full_unstemmed | Effect study of heat treatment on tensile properties of coarse sandstone |
| title_short | Effect study of heat treatment on tensile properties of coarse sandstone |
| title_sort | effect study of heat treatment on tensile properties of coarse sandstone |
| url | https://doi.org/10.1038/s41598-022-21164-w |
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