Classification and characterization of bound water in marine mucky silty clay

doi:10.1007/s11368-019-02242-5

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Classification and characterization of bound water in marine mucky silty clay
	Li, Shuo ; Wang, Changming ; Zhang, Xianwei ; Zou, Linlin ; Dai, Zhenxue
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2019
卷号	19 期号:5 页码:2509-2519
关键词	Bound water Capillary water Isothermal adsorption Mucky silty clay Thermogravimetric analysis
ISSN号	1439-0108
DOI	10.1007/s11368-019-02242-5
英文摘要	Purpose: Bound water has a large impact on physical and chemical properties of clay. The objective of this study was to investigate the contents, types, and physical properties of bound water and provide insights for understanding the thermal behavior and hydration process of the marine mucky silty clay under the control of bound water. Materials and methods: An integrated approach incorporating isothermal adsorption, thermogravimetric analysis (TGA), and specific gravity testing were developed to determine the contents and the boundaries of different types of bound water in Qingdao clay and investigate their physical characteristics. Results and discussion: Adsorption isotherm can be divided into two phases, which are the formation of strongly bound water and some capillary water under condition of p/p(s)< 0.9 and the formation of weakly bound water in the coverage for p/p(s)>0.9. The initial dehydration temperatures of strongly bound water range between 87 and 92 degrees C in the hydrated clays under condition of p/p(s) < 0.98. Weakly bound water starts to be released at temperatures near 60 degrees C and is completely removed at temperatures between 90 and 108 degrees C. Capillary water and free water are evaporated before 60 degrees C. The specific gravity of hydrated clay decreases linearly with adsorbed water contents. The volume of hydrated clay, volume of adsorbed water, and thickness of water film approximately linearly increase with adsorbed water contents. Conclusions: Quantitative determination and classification for bound water can be implemented through thermogravimetry (TG) and derivative thermogravimetry (DTG) curves. The physical properties of hydrated clay and bound water film are directly affected by the adsorbed water contents. The results may contribute to environmental and engineering risk assessment.
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
WOS记录号	WOS:000464836300032
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14989]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 3.Jilin Univ, Engn Res Ctr Geothermal Resources Dev Technol & E, Minist Educ, Changchun, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuo,Wang, Changming,Zhang, Xianwei,et al. Classification and characterization of bound water in marine mucky silty clay[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(5):2509-2519.
APA	Li, Shuo,Wang, Changming,Zhang, Xianwei,Zou, Linlin,&Dai, Zhenxue.(2019).Classification and characterization of bound water in marine mucky silty clay.JOURNAL OF SOILS AND SEDIMENTS,19(5),2509-2519.
MLA	Li, Shuo,et al."Classification and characterization of bound water in marine mucky silty clay".JOURNAL OF SOILS AND SEDIMENTS 19.5(2019):2509-2519.