The Journal of the Geological Society of Japan
Online ISSN : 1349-9963
Print ISSN : 0016-7630
ISSN-L : 0016-7630
Note
Correction of output from an internal load cell in a high-pressure triaxial deformation apparatus without a split-piston
Hiroyuki NodaMiki Takahashi
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2016 Volume 122 Issue 12 Pages 653-658

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Abstract

Internal load cells can be used to measure the axial load applied to a sample during a triaxial experiment precisely, which is key to obtaining reliable mechanical data. However, the output from an internal load cell contains an offset, which is a function of the confining pressure, pore pressure, and temperature. For an apparatus without a split-piston, the sample column has a non-zero axial load supported by O-rings even before a hit-point. Thus, a simple zero setting before the hit-point would cause an error in the measured axial load. In this technical note, we present a method that can be used to estimate the offset and correct the output by using outputs from both internal and external load cells. This method does not require additional experimentation.

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© 2016 by The Geological Society of Japan
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