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Geotechnical and Geological Engineering
Published in: Geotechnical and Geological Engineering 1/2011

01-01-2011 | Original paper

Effects of Testing Conditions on Intact Rock Strength and Variability

Authors: Widjojo A. Prakoso, Fred H. Kulhawy

Published in: Geotechnical and Geological Engineering | Issue 1/2011

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Abstract

The strength of intact rock is a fundamental and integral part of many aspects of engineering and geologic practice. It is necessary to understand how testing conditions influence this strength and its variability, especially for use in reliability-based design. In this study, the effect of sample diameter and moisture content on the strength and its variability was examined in detail. Correlations are given for assessing the effect of sample diameter on the laboratory uniaxial compressive strength (qu), Brazilian indirect tensile strength (qt-Brazilian), and point load strength (Is), and the associated direct correlations among these tests. Correlations also are given for assessing the effect of sample moisture content on qu, qt-Brazilian, and Is. The statistics of data scatter suggest these correlations can introduce large uncertainties. The effect of sample diameter and moisture content on the coefficients of variation was examined subsequently, and it was found to be relatively minor.
previous article The Effects of Fines on the Behaviour of a Sand Mixture
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Metadata
Title
Effects of Testing Conditions on Intact Rock Strength and Variability
Authors
Widjojo A. Prakoso
Fred H. Kulhawy
Publication date
01-01-2011
Publisher
Springer Netherlands
Published in
Geotechnical and Geological Engineering / Issue 1/2011
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-010-9356-y

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