A dynamic method for determining the soil water characteristic curve for coarse-grained soils

Rassam, D. W. and Williams, D. J. (2000) A dynamic method for determining the soil water characteristic curve for coarse-grained soils. Geotechnical Testing Journal, 23 1: 67-71.


Author Rassam, D. W.
Williams, D. J.
Title A dynamic method for determining the soil water characteristic curve for coarse-grained soils
Journal name Geotechnical Testing Journal   Check publisher's open access policy
Publication date 2000-03
Sub-type Article
Year available 2000
Volume number 23
Issue number 1
ISSN 0149-6115
Start page 67
End page 71
Total pages 5
Place of publication West Conshohocken, Pa.
Publisher American Society Testing Materials
Language eng
Subject C1
090501 Civil Geotechnical Engineering
Abstract The air-entry suction is an extremely important parameter in the water characteristic curve, but is difficult to identify when using conventional static methods such as the pressure plate apparatus. In the dynamic method described herein, instantaneous measurement of matric suction and water content are acquired from a soil specimen undergoing a slow drying cycle with the aid of a tensiometer and a soil moisture probe, respectively. The method offers a quick and reliable way of quantifying the drying soil-water characteristic curve (SWCC) for matric suctions of up to 80 kPa. The large number of data points acquired make it easy to obtain an accurate estimate of the air-entry suction. It is particularly effective for soils ranging from medium sands to sandy silts where a nearly continuous SWCC is provided
Keyword air-enry suction (AES)
geotechnical
matrix suction
soil-moisture probe
soil-water characteristic curve (SWCC)
tensiometer
unsaturated soils
volumetric water content
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: School of Civil Engineering Publications
 
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