Comparison of suction and oedometer methods for the measurement of swell pressure


Cokca E.

QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, vol.33, pp.141-147, 2000 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 33
  • Publication Date: 2000
  • Doi Number: 10.1144/qjegh.33.2.141
  • Title of Journal : QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY
  • Page Numbers: pp.141-147

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.