Correlation between point load strength index and uniaxial compressive strength in Sunshine Coast sandstone

Scott Roche; Adrian B McCallum

Back

Correlation between point load strength index and uniaxial compressive strength in Sunshine Coast sandstone

Journal article

Open access

Peer reviewed

Correlation between point load strength index and uniaxial compressive strength in Sunshine Coast sandstone

Scott Roche and Adrian B McCallum

Australian Geomechanics Journal, Vol.50(2), pp.79-89

2015

Files and links (2)

pdf

PDF - Published Version2.81 MBDownload View

Published VersionPDF - Published Version Open Access

url

http://australiangeomechanics.org/journal/View

Webpage

Abstract

Point Load Test Strength Index

Uniaxial Compressive Strength Test

Sunshine Coast

sandstone

Strength is an important engineering parameter for determining excavatability and load bearing characteristics of rock. Because of the low test cost, it is desirable to identify a multiplier relating the Point Load Test Strength Index (Is(50)) with strength derived using the more expensive Uniaxial Compressive Strength Test. Samples from eight test locations on the Sunshine Coast were tested using both techniques and data were analysed using multiple regression incorporating differences between the eight locations. A multiplier of 17 is observed to produce the most accurate results when inferring UCS from Is(50). This compares with the typical local multiplier of 15. UCS prediction from Is(50) results in substantial errors in some cases and complete reliance on Point Load Strength is not recommended. We recommend that UCS testing should be carried out for each engineering project and multipliers be determined on a site specific basis. © 2015, Australian Geomechanics Society. All rights reserved.

Details

Title: Correlation between point load strength index and uniaxial compressive strength in Sunshine Coast sandstone
Authors: Scott Roche (Author) - University of the Sunshine Coast
Adrian B McCallum (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Australian Geomechanics Journal, Vol.50(2), pp.79-89
Publisher: Australian Geomechanics Society
Date published: 2015
ISSN: 0818-9110
Organisation Unit: School of Science and Engineering - Legacy; Indigenous and Transcultural Research Centre; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449163502621
Output Type: Journal article

Metrics

502 File views/ downloads

4298 Record Views