气候变化领域集成服务门户(CCPortal): Statistical studies on the pore characteristic of Qinghai-Tibet Plateau silty clay modified by nano-silica

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DOI	10.1016/j.micromeso.2021.111175
	Statistical studies on the pore characteristic of Qinghai-Tibet Plateau silty clay modified by nano-silica
	Wang, Chong; Li, Shuangyang; Chen, Qian; Zhang, Hao; Liu, Xiaoyu; Ren, Xiaochuan
通讯作者	Li, SY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1387-1811
EISSN	1873-3093
卷号	322
英文摘要	Nano-particles as additive materials have been widely used in geotechnical engineering, which can significantly improve the strength and suppress cracks formation of geo-materials. Nano-particle modified geo-materials consist of a ruleless distribution of soil particles, nano-particles, water, and gas. Thus, the micro-pore properties of modified geo-materials are uncertain and variable. In addition, the variability phenomenon is intensified by the strong water absorption and adhesive aggregation of nano-silica. However, the micro-pore characteristics of nano-material modified soil and the statistical properties are very limited in literature. To address those, large samples tests on Qinghai-Tibet Plateau silty clay (>= 50 specimens) were conducted, and the median pore diameters and cumulative volume of pore diameters smaller than 0.1 mu m at four nano-silica contents (0, 0.75%, 2%, and 5%) were measured by the mercury intrusion porosimetry. The experimental data show that the two micropore parameters of fifty silty clay specimens with nano-silica additive show noticeable variability. To quantify these variablities, we assume the micro-pore diameter follows one of four probability distributions (normal, lognormal, Weibull, and gamma). The experimental curves were compared with four selected potential probability distributions and it was found that all distributions agreed well with the experimental data, approximatively. Nevertheless, only three distributions (normal, lognormal, and gamma) satisfy the Hypothesis testing. The results of chi-square test indicate that the normal distribution had the smallest effect evaluation index, and it could well describe the micro-pore parameters of nano-silica modified silty clay. The results will benefit a better understanding of the changeability of micro-pore characteristics of nano-particle modified geomaterials. Besides, these results are significant for interpreting the micromechanical mechanism of modified soils, and are helpful to guide the selection of additive materials for modified porous media.
关键词	NANOSILICA STRENGTH SAND
英文关键词	Pore size distribution; Mercury intrusion porosimetry; Scanning electron microscope; Normal distribution; Geotechnical material
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000660454100004
来源期刊	MICROPOROUS AND MESOPOROUS MATERIALS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253767
作者单位	[Wang, Chong; Chen, Qian; Zhang, Hao; Liu, Xiaoyu; Ren, Xiaochuan] Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Minist Educ China, Lanzhou 730000, Peoples R China; [Wang, Chong; Chen, Qian; Zhang, Hao; Liu, Xiaoyu; Ren, Xiaochuan] Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Peoples R China; [Li, Shuangyang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chong,Li, Shuangyang,Chen, Qian,et al. Statistical studies on the pore characteristic of Qinghai-Tibet Plateau silty clay modified by nano-silica[J]. 中国科学院西北生态环境资源研究院,2021,322.
APA	Wang, Chong,Li, Shuangyang,Chen, Qian,Zhang, Hao,Liu, Xiaoyu,&Ren, Xiaochuan.(2021).Statistical studies on the pore characteristic of Qinghai-Tibet Plateau silty clay modified by nano-silica.MICROPOROUS AND MESOPOROUS MATERIALS,322.
MLA	Wang, Chong,et al."Statistical studies on the pore characteristic of Qinghai-Tibet Plateau silty clay modified by nano-silica".MICROPOROUS AND MESOPOROUS MATERIALS 322(2021).