Study of swelling-shrinkage regularity of montmorillonite crystal and its relation with matric suction

P5; The swell-shrinking mineral of saturated and unsaturated expansive soil has important effect on engineering mechanical behavior. Based on the swelling-shrinkage change regularity of montmorillonite crystal in this paper, the actions between various interlayers of montmorillonite crystal are gene...

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Published in中国科学D辑(英文版) Vol. 44; no. 6; pp. 498 - 507
Main Authors TAN Luorong, KONG Lingwei
Format Journal Article
LanguageEnglish
Published LRSM Laboratory, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2001
Subjects
osmotic pressure
montmorillonite
crystal interlayer distance
matric suction
comprehensive action potential
swelling-shrinkage potential
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Summary:P5; The swell-shrinking mineral of saturated and unsaturated expansive soil has important effect on engineering mechanical behavior. Based on the swelling-shrinkage change regularity of montmorillonite crystal in this paper, the actions between various interlayers of montmorillonite crystal are generally summarized as two kinds of action potentials-shrinkage potential and swelling potential. Moreover, through the experimental research and analysis, the expression formula for variations of the swelling potential and shrinkage potential with interlayer distance is presented, and the regularity of matric suction variations with interlayer distance is also obtained for unsaturated expansive soil. It may provide a new theoretical basis and research path for further research on the swelling-shrinkage mechanism of expansive soil and matric suction potential of unsaturated soil.
ISSN:1006-9313
DOI:10.3969/j.issn.1674-7313.2001.06.003