Marble Quality Designation

Rock mass block quality designation bqd has been proposed as the ratio of the total length of the scan trace line length to the cumulative length of the discontinuity spacing and or borehole core length equal to and or greater than 1 m as percentage.

Marble quality designation.

Obviously the thicker the marble tile the better as marble tiles naturally contain flaws. Mining rock quality designation rqd sgs s approach is to understand the variability in your deposit and map it using proven grindability technologies such as rock quality designation rqd. Bqd 100 σ s 1m l where s is the. Ask for the marble s complete name.

We then design and optimize your grinding and grinding circuit for throughput and recovery. The family created the office of marble in 1564 to regulate the marble mining industry. The a classification is the highest quality and d is the lowest in terms of that particular marble slab s soundness or how easy it is to work with from a fabricator s or an installer s perspective. Carrara marble has been used since the time of ancient rome and it was called the luni marble.

Thassos aaa for example is a higher quality of stone than standard thassos. In the 17th and 18th centuries the marble quarries were monitored by the cybo and malaspina families who ruled over massa and carrara. The thickness of tile its calibration offers one indication of its quality. The city of massa in particular saw much of its plan.