ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 6

A Calibration Chamber for Cohesive Soils

Huang, A-B
Assistant professor, Clarkson University, Potsdam, NY

Holtz, RD
Professor and associate professor, School of Civil Engineering, Purdue University, West Lafayette, IN

Chameau, J-L
Professor and associate professor, School of Civil Engineering, Purdue University, West Lafayette, IN

Abstract

The paper describes the design and performance of a calibration chamber system for testing in-situ test devices in cohesive soils. Techniques for preparing “undisturbed” clay specimens from a slurry and consolidating them under zero lateral strain K₀ conditions are presented. The chamber was used for strain controlled model pressurementer tests during which pore pressure was monitored. Duplicate model pressuremeter tests performed in normally consolidated (NC) kaolinite (σ′_vc = 276 kPa) resulted in essentially identical expansion curves. The specimens had an average water content of 44.9% and a coefficient of variation of 1.5%. Also, the predicted lateral stresses essentially coincide with those applied to the chamber specimen.

Keywords:
calibration chamber, cohesive soils, in-situ tests, slurry consolidometer, undisturbed specimens, pressuremeter testing, pore pressure monitoring

Paper ID: GTJ10641J
DOI: 10.1520/GTJ10641J
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