›› 2011, Vol. 32 ›› Issue (4): 973-0978.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Soil-water characteristic curves of two bentonites

SUN De-an1，MENG De-lin1，SUN Wen-jing1，LIU Yue-miao2   

  1. 1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. Beijing Research Institute of Uranium Geology, Beijing 100029, China
  • Received:2010-04-27 Online:2011-04-10 Published:2011-04-29

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Abstract:

The filter paper method and the pressure plate method are used for measuring the soil-water characteristic of Kunigel-V1 and Gaomiaozi (GMZ) bentonites. The soil-water characteristic curves (SWCC) obtained from the tests at different void ratios are compared. Relation between SWCC and void ratio and the effects of void ratio on the soil-water characteristic of bentonite are also analyzed. The results show that when the SWCC is expressed by the relation between suction and water content, the effect of void ratio on the SWCC is rather small at the range of higher suction; when the SWCC is expressed by the relation between suction and the saturation degree, the SWCC moves up and right with the decreasing of void ratio. That’s to say, the saturation degree increases with the decreasing of void ratio at a constant suction; and the change is nearly linear. On the other hand, when the void ratios are the same, the SWCCs of Kunigel-V1 bentonite and GMZ bentonite are almost the same. In other words, the soil-water characteristics of the two bentonites are quite similar.

Key words: Kunigel-V1 bentonite, Gaomiaozi bentonite, soil-water characteristic curve(SWCC), filter paper method, high-level radioactive waste(HLW)

CLC Number: 

  • TU 443
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