›› 2006, Vol. 27 ›› Issue (S1): 515-518.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Character of standard absorption moisture of Hefei expansive soil

XU Xi-chang, CHEN Shan-xiong, YU Fei, YU Song   

  1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2006-04-27 Published:2006-12-15

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Abstract: The standard absorption moisture, as one of the three discrimination indexes recommended by specifications for design of highway subgrades (JTG D30-2004), its applicability in Hefei expansive soil classification is discussed; and the correlated character with liquid limit, plasticity index, free swelling ratio and the content of colloidal particle less than 0.002 mm are presented. It has been approved by a lot of laboratory tests that the standard absorption water content can reflect the swelling potential level of Hefei expansive soil, but the criterion suggested by the above specifications is unsuitable. A certain dependence relation exists between standard absorption water content and other discrimination parameters; square values of correlation coefficients is from 0.468 to 0.663. In brief, standard absorption moisture can be the discrimination index because it can explain the nature of the expansive soil.

Key words: standard absorption moisture, Hefei expansive soil, identification, correlation coefficient

CLC Number: 

  • TU 443
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