Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016)

A novel grading methodology and recovery assessment technique for dimensional stone production

Authors
Babu A Rajan, G.C. Naveen, S.S. Meena
Corresponding Author
Babu A Rajan
Available Online November 2016.
DOI
https://doi.org/10.2991/rare-16.2016.72How to use a DOI?
Keywords
grading; dimensional stone; recovery
Abstract
A methodology was formulated for grading the quarries. To grade the quarry in terms of quality, the geological-cum-geotechnical characteristics of the rock mass and physico-mechanical properties were mainly considered. The point load test and rebound hardness using Schmidt hammer were used to estimate the in-situ uniaxial strength of the rock mass. Representative blocks of samples were taken from each quarry for laboratory studies to determine their critical properties as dimensional stone. The grading guidelines for recoverable volume are as Grade – A Blocks of Uniform Colour and without defects , Grade – B Blocks with uniform colour and <10% natural defects/m3, Grade – C Blocks with distributed colour with 11%-30% natural defects/m3 and Grade – D Blocks with distributed colour and >30% natural defects/m3. Case studies were taken up in four different dimensional stone granite quarries. The quarries were initially assessed for their overall recovery and from theestimated recovery, the percentage of various grades were projected. Based on the grading principle, the overall recovery is found to be 16% (A-12%, B-32%, C-38%, D-19%), 18% (A-4%, B-25%, C-41%, D-30%), 26% (A-5%, B-39%, C-32%, D-24%) and 21% (A-4%, B-39%, C-33%, D-24%) respectively. The projected recoveries and grading can be adopted at 90% confidence level.
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Proceedings
Recent Advances in Rock Engineering (RARE 2016)
Part of series
Advances in Engineering Research
Publication Date
November 2016
ISBN
978-94-6252-260-2
ISSN
2352-5401
DOI
https://doi.org/10.2991/rare-16.2016.72How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Babu A Rajan
AU  - G.C. Naveen
AU  - S.S. Meena
PY  - 2016/11
DA  - 2016/11
TI  - A novel grading methodology and recovery assessment technique for dimensional stone production
BT  - Recent Advances in Rock Engineering (RARE 2016)
PB  - Atlantis Press
SP  - 455
EP  - 461
SN  - 2352-5401
UR  - https://doi.org/10.2991/rare-16.2016.72
DO  - https://doi.org/10.2991/rare-16.2016.72
ID  - ARajan2016/11
ER  -