SYMPOSIA PAPER Published: 01 January 1994

Volume-Controlled Hydrologic Property Measurements in Triaxial Systems


New capabilities for hydrologic property measurements in triaxial systems include: (1) volume-controlled and simultaneous measurements of hydraulic conductivity and one-dimensional consolidation (or specific storage) of a saturated test specimen; and (2) volume-controlled measurements of hydraulic conductivity, matric potential, and the variation of these properties with the moisture content of an unsaturated test specimen.

Data on saturated kaolinite demonstrate simultaneous hydraulic-conductivity and one-dimensional consolidation tests with continuous monitoring of both vertical and horizontal effective stresses. Data on well-graded silty sand demonstrate the feasibility of concurrent constant-flow hydraulic conductivity and matric potential measurements, and the variation of these properties with moisture content, for undisturbed and unsaturated specimens mounted in triaxial cells. Refinements needed to realize the full potential of these capabilities include a more rigid triaxial cell to minimize compliance, and an improved technique for measuring hydraulic-head differences within an unsaturated test specimen.

Author Information

Olsen, HW
U. S. Geological Survey, Denver, CO
Willden, AT
Geotrans Inc., Boulder, CO
Kiusalaas, NJ
Advanced Sciences Inc., Lakewood, CO
Nelson, KR
Colorado School of Mines, Golden, CO
Poeter, EP
Colorado School of Mines, Golden, CO
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Developed by Committee: D18
Pages: 482–504
DOI: 10.1520/STP23904S
ISBN-EB: 978-0-8031-5259-5
ISBN-13: 978-0-8031-1442-5