Experimental investigation on microstructure and surface morphology deterioration of limestone exposed on acidic environment
文献类型：期刊论文
| 作者 | Liu, Xuewei3; Deng, Wei1,3; Wang, Sai3,4; Liu, Bin3; Liu, Quansheng2 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2023-05-09 |
| 卷号 | 377期号:-页码:- |
| ISSN号 | 0950-0618 |
| 关键词 | Acidic enviorment Limestone material Pore structure Joint surface morphology Shear strength |
| 英文摘要 | Understanding evolution of microstructure and surface morphology is essential for studying the strength of building material in acidic enviorment. In this study, the microstructure of limestone samples immersed in acidic solutions of varying pH values was evaluated by nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), while the joint surface morphology evolution process was determined by three-dimensional (3D) scanning experiments. Further, direct shear tests on the immersed jointed samples were conducted for shear properties analysis. It is found that the pore size distribution gradually changes from nanopore to micropore with the decrease in pH value, while the single pore area and perimeter increased and the fractal dimension decreased. Therefore, the increased pore distribution, enlarging in area, and change in the shape of the pores altered the microstructure and caused the increase in porosity. Also, with the decrease in pH value, the decrease rate of 3D relative fluctuation height, angle, and 3D area ratio increase. The 3D average fluctuation angle decreases the most, whereas the 3D area ratio decreases the least. In an acidic environment, the 3D surface morphology is significantly influenced by the 3D average fluctuation angle, which eventually changes joint roughness. Under the condition of acidic underground water, the microstructure of the joint wall and surface morphology of the joint degraded, thereby affecting the joint shear behavior. Therefore, the degradation of joint roughness coefficient and joint wall compressive strength should be considered for evaluating the joint mechanical properties in an acidic environment. |
| 学科主题 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:001026743600001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35361]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China 2.The Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430072, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China |
| 推荐引用方式 GB/T 7714 | Liu, Xuewei,Deng, Wei,Wang, Sai,et al. Experimental investigation on microstructure and surface morphology deterioration of limestone exposed on acidic environment[J]. CONSTRUCTION AND BUILDING MATERIALS,2023,377(-):-. |
| APA | Liu, Xuewei,Deng, Wei,Wang, Sai,Liu, Bin,&Liu, Quansheng.(2023).Experimental investigation on microstructure and surface morphology deterioration of limestone exposed on acidic environment.CONSTRUCTION AND BUILDING MATERIALS,377(-),-. |
| MLA | Liu, Xuewei,et al."Experimental investigation on microstructure and surface morphology deterioration of limestone exposed on acidic environment".CONSTRUCTION AND BUILDING MATERIALS 377.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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