Quarry process, also known as QP, dense grade aggregate (DGA), crusher run and road stone, is a combination of small, 3/4-inch-or-less crushed stone and stone dust. Most often it is made out of crushed limestone, granite-gneiss, trap rock or a combination of the aforementioned.
Stone quarrying is the multistage process by which rock is extracted from the ground and crushed to produce aggregate, which is then screened into the sizes required for immediate use, or for further processing, such as coating with bitumen to make bituminous macadam (bitmac) or asphalt.
How rock impacts crusher choice. Sandstone, limestone and granite are arguably the three most common aggregate used in the construction industry. But these rocks each have very different hardness and abrasiveness characteristics. The type of rock you need to process will dictate the types of crushers needed in the crushing circuit.
Quarry crushing plant can be applied to the crushing of limestone, basalt, granite, cobblestone and other rocks. The quality of the finished products after crushing can fully reach the GB14685-2001 standard, providing qualified aggregates for highways, railways, water conservancy, and concrete mixing plants.
The final result is an extremely sturdy construction and landscaping material. Typically crusher run is available in sizes from 3/4″ to a #200 sieve. Depending on the quarry where it was manufactured, the material may be comprised of limestone, trap rock, granite or a combination of these. Best Uses for Crusher Run
Mobile crushers are used in quarries, in mining, on jobsites, and in the recycling industry. These plants are mounted on crawler tracks and can process rock and recycling material, producing mineral aggregate and recycled building materials respectively for the construction industry.
Our nation’s roads, bridges, buildings and other construction projects are created with aggregates. Natural aggregates are composed of crushed stone and sand and gravel. Igneous, sedimentary, and metamorphic rocks are used to make crushed stone and are extracted by open pit and underground mining techniques.