Journal Published Online: 05 June 2015
Volume 43, Issue 6

Reliability of Analysis Methods for Identifying Dispersive Clays

CODEN: JTEVAB

Abstract

Numerous methods for identifying dispersive clays have been proposed: the pinhole test, the double hydrometer test, the crumb test, the sodium adsorption ratio test, the percentage of the exchangeable sodium cation test, and a number of different auxiliary tests. However, the results of these methods have been in some cases inconsistent. Therefore, in this study, identification tests and conventional laboratory index tests for 34 cohesive soil samples collected from 10 domestic and foreign engineering projects completed by the China Institute of Water Resources and Hydropower Research over the last 20 years were analyzed and compared. The results showed that the dispersive grade of clay was not directly related to the gradation, specific gravity, liquid limit, or plasticity index but was closely related to the soil pH value. Moreover, the pinhole test was not suitable for identifying the dispersion of soil with a low clay content or high expansion.

Author Information

Wei, Yingqi
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, CN
Cai, Hong
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, CN
Wen, Yanfeng
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, CN
Yan, Jun
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, CN
Xiao, Jianzhang
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, CN China Institute of Water Resources and Hydropower Research, Beijing, CN
Pages: 8
Price: $25.00
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Stock #: JTE20140283
ISSN: 0090-3973
DOI: 10.1520/JTE20140283