On the Measurement of Water Pressure in Soils with High Suction Tensiometers

Lourenco, Sergio, Gallipoli, Domenico, Toll, David and Evans, Fred 2009. On the Measurement of Water Pressure in Soils with High Suction Tensiometers. Geotechnical Testing Journal 32 (6) , pp. 1-7. 10.1520/GTJ102372

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Abstract

Past studies on the use of high suction tensiometers for measuring negative pore water pressure have focused on three different aspects, namely, initial saturation of the probe, calibration over both positive and negative pressure ranges, and measurement procedures. Among these three areas, the one focusing on measurement procedures has undeservedly received less attention. Aspects related to measurement conditions during laboratory or field testing are as important as the initial pre-conditioning or calibration of the probe. According to the particular type of measurement, different aspects of the testing procedure have to be considered in order to obtain accurate readings of pore water pressure. This note presents preliminary data to highlight the importance of factors, such as measurement time, soil-probe contact, and material type, when measuring suction by means of high suction tensiometer.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	laboratory testing, unsaturated soils, high suction tensiometers
Publisher:	ASTM International
ISSN:	0149-6115
Last Modified:	19 Mar 2016 22:16
URI:	https://orca.cardiff.ac.uk/id/eprint/10343

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