Effect of Microstructure on Changes to the Pore Structure and Mechanical Properties of Limestone under Acidic Groundwater Corrosion
文献类型：期刊论文
| 作者 | Liu, Xuewei1; Wang, Sai1,3; Liu, Bin1; Chen, Juxiang1,3; Liu, Quansheng2; Luo, Jin3 |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 23期号:12页码:16 |
| 关键词 | Mechanical property Pore structure Acid corrosion Brittleness index Rock mass |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/IJGNAI.GMENG-8847 |
| 英文摘要 | Rock mass subjected to acidic groundwater corrosion may cause great property alteration. In this work, the effects of microstructure on change of the pore structure and mechanical property under acid corrosion were investigated. Two types of limestone, which are microstructurally different but have almost same mineral compositions, were corroded in HCl and Na2SO4 mixed solutions with different pH values (pH = 3, 4, 5, 6, and 7). A series of approaches including uniaxial compression, Brazilian splitting, and nuclear magnetic resonance (NMR) tests were carried out to examine the strength, brittle index, porosity, and pore distribution. The mechanical properties (uniaxial compressive strength, elastic modulus, tensile strength, and brittleness index) decreased as the pH value decreased. In addition, the larger the initial microstructure, the faster the degradation rate of mechanical parameters except for the brittleness index. Moreover, NMR results revealed that the porosity increment of Group 2 (large initial microstructure) was larger than that of Group 1 (small initial microstructure). Under acid corrosion, the reason for the increasing porosity in Group 1 was the increased proportion of the internanopore, while it was transition from the supernanopore to the submicropore for Group 2. Furthermore, the brittleness index decreased as porosity increased and the proportion of the internanopore decreased. Finally, the degradation mechanisms of pore and mechanical properties were discussed. |
| 资助项目 | This work is supported by the National Natural Science Foundation of China (Grant No: 51974289) and the Natural Science Foundation of Anhui Province (Grant No: 2108085ME155).[51974289] ; National Natural Science Foundation of China[2108085ME155] ; Natural Science Foundation of Anhui Province |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001084767800005 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39783]  |
| 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.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China 3.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xuewei,Wang, Sai,Liu, Bin,et al. Effect of Microstructure on Changes to the Pore Structure and Mechanical Properties of Limestone under Acidic Groundwater Corrosion[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2023,23(12):16. |
| APA | Liu, Xuewei,Wang, Sai,Liu, Bin,Chen, Juxiang,Liu, Quansheng,&Luo, Jin.(2023).Effect of Microstructure on Changes to the Pore Structure and Mechanical Properties of Limestone under Acidic Groundwater Corrosion.INTERNATIONAL JOURNAL OF GEOMECHANICS,23(12),16. |
| MLA | Liu, Xuewei,et al."Effect of Microstructure on Changes to the Pore Structure and Mechanical Properties of Limestone under Acidic Groundwater Corrosion".INTERNATIONAL JOURNAL OF GEOMECHANICS 23.12(2023):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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