气候变化领域集成服务门户(CCPortal): Characteristics of Micro-structure of Warm and Ice-Rich Frozen Soil Improved by Cement and Additives

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DOI	10.1007/s12205-021-1690-5
	Characteristics of Micro-structure of Warm and Ice-Rich Frozen Soil Improved by Cement and Additives
	Chai, Mingtang; Zhang, Jianming; Zhang, Hu; Yin, Zhenhua
通讯作者	Zhang, H (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	1226-7988
EISSN	1976-3808
起始页码	3691
结束页码	3700
卷号	25 期号:10
英文摘要	In permafrost regions, the warm and ice-rich frozen soil (WIRFS) underlying the embankment has a low strength and large compressibility, which threatens the engineering stability. The addition of cement and its additives can improve the mechanical properties of the WIRFS. During the curing and the thawing compression, the micro-structure of the improved WIRFS was changed by hydration reaction and deformation. In this paper, the porosity and directionality of soil were selected as indicators to reflect the variation of micro-structure in the improved WIRFS. Two image processing methods, fuzzy C-means clustering and image segmentation, were introduced to quantitatively calculate the porosity and the directionality of soil particles. The arrangement variation of soil aggregates can reflect the characteristics of micro-structure during the soil improvement. The results indicate that, the addition of cement and additives reduced the directionality of sample before the thawing compression. After the compression, except for the super absorbent polymer, ironic agent, EN-1, Toogood and geopolymer, the addition of antifreeze agent, early strength agent and metakaolin increased the directionality. The average porosity is negatively relevant to the compressibility coefficient. This paper has connected the micro-structure with deformation parameter of the improved frozen soil, which can reflect the improvement mechanism with cement and additives.
关键词	CALCIUM FLY-ASH PORTLAND-CEMENT COMPRESSIVE STRENGTH STABILIZATION ADMIXTURES HYDRATION
英文关键词	Permafrost; Porosity; Directionality; Image processing; Soil improvement
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil
WOS记录号	WOS:000674212000004
来源期刊	KSCE JOURNAL OF CIVIL ENGINEERING
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/254423
作者单位	[Chai, Mingtang] Ningxia Univ, Sch Civil & Hydraul Engn, Yinchuan 750021, Ningxia, Peoples R China; [Chai, Mingtang; Zhang, Jianming; Zhang, Hu; Yin, Zhenhua] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yin, Zhenhua] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chai, Mingtang,Zhang, Jianming,Zhang, Hu,et al. Characteristics of Micro-structure of Warm and Ice-Rich Frozen Soil Improved by Cement and Additives[J]. 中国科学院西北生态环境资源研究院,2021,25(10).
APA	Chai, Mingtang,Zhang, Jianming,Zhang, Hu,&Yin, Zhenhua.(2021).Characteristics of Micro-structure of Warm and Ice-Rich Frozen Soil Improved by Cement and Additives.KSCE JOURNAL OF CIVIL ENGINEERING,25(10).
MLA	Chai, Mingtang,et al."Characteristics of Micro-structure of Warm and Ice-Rich Frozen Soil Improved by Cement and Additives".KSCE JOURNAL OF CIVIL ENGINEERING 25.10(2021).