Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles
The cyclic wetting–drying (W–D) effect as a typical form of weathering causes the engineering properties of rock degradation. Unlike previous research on soft sedimentary rocks, this study sought to investigate the influence of W–D cycles on the physical and mechanical properties of the black sandy...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/10/1306 |
| _version_ | 1797572749202292736 |
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| author | Lei Zhu Xinyu Luo Zhibo Li Haifeng Li Xin Liao Qiang Tang |
| author_facet | Lei Zhu Xinyu Luo Zhibo Li Haifeng Li Xin Liao Qiang Tang |
| author_sort | Lei Zhu |
| collection | DOAJ |
| description | The cyclic wetting–drying (W–D) effect as a typical form of weathering causes the engineering properties of rock degradation. Unlike previous research on soft sedimentary rocks, this study sought to investigate the influence of W–D cycles on the physical and mechanical properties of the black sandy dolostone. The results show that the surface hardness and uniaxial compressive strength decreased by 1.5% and 17.2%, respectively, after 12 W–D cycles. The behavior of water absorption of dolostone showed a logarithmic growth with W–D cycles. Analysis of the pH and electrical conductivity values of the soaking solution and microstructure of dolostone revealed that carbonate mineral and feldspar dissolution was the major reason to result in the increase in pore volume and micro-fissure. The oxidation of pyrite contained in the rock was deduced to accelerate the chemical reaction and rock degradation. The obtained results are expected to provide engineering values for rock mechanics studies when compared with in situ conditions. |
| first_indexed | 2024-03-10T21:01:14Z |
| format | Article |
| id | doaj.art-09b4c6fa12c64e9b8f05283e6a0b36c9 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T21:01:14Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-09b4c6fa12c64e9b8f05283e6a0b36c92023-11-19T17:30:32ZengMDPI AGMinerals2075-163X2023-10-011310130610.3390/min13101306Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying CyclesLei Zhu0Xinyu Luo1Zhibo Li2Haifeng Li3Xin Liao4Qiang Tang5China 19th Metallurgical Group Co., Ltd., Chengdu 610031, ChinaSchool of Rail Transportation, Soochow University, Suzhou 215131, ChinaChina 19th Metallurgical Group Co., Ltd., Chengdu 610031, ChinaChina 19th Metallurgical Group Co., Ltd., Chengdu 610031, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaSchool of Rail Transportation, Soochow University, Suzhou 215131, ChinaThe cyclic wetting–drying (W–D) effect as a typical form of weathering causes the engineering properties of rock degradation. Unlike previous research on soft sedimentary rocks, this study sought to investigate the influence of W–D cycles on the physical and mechanical properties of the black sandy dolostone. The results show that the surface hardness and uniaxial compressive strength decreased by 1.5% and 17.2%, respectively, after 12 W–D cycles. The behavior of water absorption of dolostone showed a logarithmic growth with W–D cycles. Analysis of the pH and electrical conductivity values of the soaking solution and microstructure of dolostone revealed that carbonate mineral and feldspar dissolution was the major reason to result in the increase in pore volume and micro-fissure. The oxidation of pyrite contained in the rock was deduced to accelerate the chemical reaction and rock degradation. The obtained results are expected to provide engineering values for rock mechanics studies when compared with in situ conditions.https://www.mdpi.com/2075-163X/13/10/1306water–rock interactionwetting–drying cyclesstrength decreasestructure deterioration |
| spellingShingle | Lei Zhu Xinyu Luo Zhibo Li Haifeng Li Xin Liao Qiang Tang Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles Minerals water–rock interaction wetting–drying cycles strength decrease structure deterioration |
| title | Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles |
| title_full | Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles |
| title_fullStr | Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles |
| title_full_unstemmed | Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles |
| title_short | Degradation Characteristics and Mechanism of Black Sandy Dolostone Subjected to Wetting–Drying Cycles |
| title_sort | degradation characteristics and mechanism of black sandy dolostone subjected to wetting drying cycles |
| topic | water–rock interaction wetting–drying cycles strength decrease structure deterioration |
| url | https://www.mdpi.com/2075-163X/13/10/1306 |
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