Sand Rock crushing is a process used in the construction, mining, and aggregate industry. As the name suggests, it involves breaking down rock sand into fine, small pieces. The process usually involves several major pieces of equipment. A loader loads the crusher with the large pieces of rock. The crusher cannot crush boulder sized stone.
The optimal size is about that of a basketball. There is a crusher that crushes the rock sand into smaller sizes and feeds the crushed material into another machine called a rock screener. The job of the screener is to size the sand into piles of different sizes. There are a number of factors which influence the crushing process. Some of the factors affecting crushing ratio are hardness, material resistance strength, size, shape, density and humidity. There are some external factors too such as the interaction and distribution of materials when crushing is conducted.
In crushing, the external force has to be great to overcome the binding force between the rock sand particles. The structure of crystals in the rock sand determines how strong the cohesion is in the rock.
Rocks sand is crushed on construction sites and in quarries. Rocks are completely crushed on demolition and recycling sites. Excavated rocks on jobsites that may otherwise be regarded as a waste product can be turned into profit with crushing. Crushed rock can later be used in concrete, in the construction of roads, as fill material in building foundations, for erosion control, as driveways, to bed piping for underground utilities, in asphalt foundations under pavers, and in landscaping.
Often not realized by most people, crushed rock sand is used as a foundation under concrete slabs, under asphalt in all roads and highways and is an integral component of any type of construction. Many excavation companies that excavate rock sand also have a portable rock crusher to crush the excavated rocks on the jobsite. Excavated rock sand on a jobsite should not be discarded as it can always be turned into a useful product.
Crushing rock sand on the jobsite saves money in two ways. Crushed rock sand is always in demand on jobsites. If the rock is crushed onsite, there is no need to purchase crushed rock from a quarry or go to the expense of hauling rock onto the jobsite for concrete and asphalt. If the product is used onsite, there is also no need to haul off the excess. It is also a more environmentally friendly to use onsite product.
There are several different machines which crush rocks. Some of the crushers include jaw crushers, cone crushers, impact crushers and roller crushers. Mostly, rock or raw material is inserted into these machines through the hopper on top. The crushed material comes out from an opening at the bottom of the machine.
New varieties of machines offer crushing on-site which offers increased convenience to contractors. They also have higher efficiency and a wide range of compression strengths.