Comparison of suction and oedometer methods for the measurement of swell pressure
QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, vol.33, pp.141-147, 2000 (SCI-Expanded)
- Publication Type: Article / Article
- Volume: 33
- Publication Date: 2000
- Doi Number: 10.1144/qjegh.33.2.141
- Journal Name: QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
- Page Numbers: pp.141-147
- Middle East Technical University Affiliated: No
Abstract
In this paper, a thermocouple psychrometric technique is used to measure soil suction and assess the reliability of a swell pressure prediction method. Kaolinite-bentonite clay mixtures were prepared to obtain expansive soils with a wide range of plasticities. Suction measurements using thermocouple psychrometers and constant volume swell tests in oedometers were made on statically compacted :specimens. Soil suction-water content relationships were evaluated. The results indicate a linear relationship between the logarithm of initial soil suction and swell pressure measured in the oedometer. it has been shown that the method proposed by Johnson & Snethen for the prediction of swell pressure using suction measurements overestimates the ultimate swell pressure.