Quantitative Analysis on Tensile Mechanical Properties and Microscopic Characteristics of Acidified Limestone
文献类型：期刊论文
| 作者 | Liu, Xuewei1; Wang, Sai1,2; Liu, Bin1; Liu, Qingcheng1; Liu, Quansheng3; Luo, Jin2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2024-05-06 |
| 页码 | 23 |
| 关键词 | Acidified limestone Rock mechanics Tensile strength Nanoindentation Failure mode |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-024-03922-6 |
| 英文摘要 | The hard rock roof in coal mines is prone to failure, causing catastrophic disasters due to highly concentrated stresses. Acidification can effectively degrade the resulting mechanical properties of hard rocks. Therefore, quantitative assessment and understanding of the tensile properties and microscopic characteristics of acidified limestone is essential for rock engineering. In this work, Brazilian splitting tests (BSTs) were carried out on acid-immersed limestone specimens and the resulting properties were determined by digital image correlation (DIC), 3D scanning, and nanoindentation. The effects of varying pH values on tensile properties, splitting surface morphology, and nanoindentation characteristics were investigated. The results indicate the tensile strength decreases with the decrease in pH value, while the splitting failure mode gradually transitions from I-shaped tensile to Y-shaped tensile-shear failure mode. Further, DIC results indicate that the maximum principal strain increases gradually. The evaluation of the splitting surface also showed that the roughness, relative fluctuation height, angle, area ratio of the splitting surface, and the range of indentation depth increase as the pH value decreases, while the relative fluctuation height increases the most. Nanoindentation confirms that the micromechanical parameters (hardness, modulus, and fracture toughness) degrade to varying degrees due to the acidification. Finally, the correlation between tensile strength and micromechanical parameters was developed for a better understanding of the microscopic deterioration mechanism in acidified limestone. Acidification significantly affects the tensile strength and failure mode of limestone specimens.Micromechanical properties are gradually decreased as pH decreases.Tensile strength and micromechanical parameters are correlated.Acidification modifies the pore structure and micromechanical properties, reducing tensile strength. |
| 资助项目 | National Natural Science Foundation of China |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001214929000002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41220]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Bin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China 3.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xuewei,Wang, Sai,Liu, Bin,et al. Quantitative Analysis on Tensile Mechanical Properties and Microscopic Characteristics of Acidified Limestone[J]. ROCK MECHANICS AND ROCK ENGINEERING,2024:23. |
| APA | Liu, Xuewei,Wang, Sai,Liu, Bin,Liu, Qingcheng,Liu, Quansheng,&Luo, Jin.(2024).Quantitative Analysis on Tensile Mechanical Properties and Microscopic Characteristics of Acidified Limestone.ROCK MECHANICS AND ROCK ENGINEERING,23. |
| MLA | Liu, Xuewei,et al."Quantitative Analysis on Tensile Mechanical Properties and Microscopic Characteristics of Acidified Limestone".ROCK MECHANICS AND ROCK ENGINEERING (2024):23. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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