A novel grading methodology and recovery assessment technique for dimensional stone production
Babu A Rajan, G.C. Naveen, S.S. Meena
Babu A Rajan
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.72How to use a DOI?
- grading; dimensional stone; recovery
- 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.
- 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 -