Quantifying the Morphology of Calcareous Sands by Dynamic Image Analysis

doi:10.1061/(ASCE)GM.1943-5622.0001640

	Quantifying the Morphology of Calcareous Sands by Dynamic Image Analysis
	Wei, Houzhen 3; Zhao, Tao 2; Meng, Qingshan 3; Wang, Xinzhi 3; Zhang, Bin 1
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2020-04-01
卷号	20 期号:4 页码:11
关键词	Particle morphology Calcareous sand Normal compression Particle breakage
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0001640
英文摘要	It is commonly accepted that the macroresponse of soil depends significantly on the microscopic particle characteristic features, such as size, shape, and roughness. These parameters can be obtained readily by dynamic image analysis of each individual particle, enabling the quantification of particle morphologies. This study investigated the variation of calcareous sand morphology before and after the one-dimensional normal compression. The tests employed a large oedometer cell (231.6-mm inner diameter and 155-mm height) and coarse calcareous particles (10-20 mm). It was found that samples of different particle shape mixtures have almost the same compressibility due to continuous breakage and gradual fining of coarse sand particles. The particle breakage can be effectively quantified by the change of total particle perimeters in the dynamic image analysis. The mixture of branched particles in blocky sands can effectively increase the particle breakage factor because the branched structure can be easily crushed due to localized stresses during the compression. The breakage of coarse particles can produce a large number of fine particles with an exponential frequency distribution (by number). These fine particles generally are more elongated and flatter than the coarser particles. After the compression tests, all particles tended to be slightly smoother and more spherical, due mainly to the particle asperity damage. In particular, the rounded (spherical) particles were much smoother than the angular ones. The relevance of particle morphology change to geotechnical engineering practice also is established.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19060301] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010200] ; National Natural Science Foundation of China[41877260] ; National Natural Science Foundation of China[41877267] ; National Natural Science Foundation of China[41602289]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000514922800025
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23506]
专题	中科院武汉岩土力学所
通讯作者	Zhao, Tao
作者单位	1.China Petr Pipeline Int, North Yinhe Rd, Langfang 065000, Peoples R China 2.Brunel Univ London, Dept Civil & Environm Engn, London UB8 3PH, England 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Wei, Houzhen,Zhao, Tao,Meng, Qingshan,et al. Quantifying the Morphology of Calcareous Sands by Dynamic Image Analysis[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2020,20(4):11.
APA	Wei, Houzhen,Zhao, Tao,Meng, Qingshan,Wang, Xinzhi,&Zhang, Bin.(2020).Quantifying the Morphology of Calcareous Sands by Dynamic Image Analysis.INTERNATIONAL JOURNAL OF GEOMECHANICS,20(4),11.
MLA	Wei, Houzhen,et al."Quantifying the Morphology of Calcareous Sands by Dynamic Image Analysis".INTERNATIONAL JOURNAL OF GEOMECHANICS 20.4(2020):11.