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All about Crushed Rocks

As the name suggests, it involves rocks that have been crushed or broken down by crushing machines. It is mainly used an aggregate for construction and landscaping purposes. But it is important to note that they are not gravel. We often confuse crushed stone with gravel. Natural processes produce gravel and its surface is rounded as opposed to the angular surfaces of the crushed stone.

Although in its raw state crushed rock are relatively cheap, they are a valuable resource and a major revenue producing industry worldwide. An interesting thing about this gardening material is that it is often produced locally since their cost of transportation is higher than the material itself. Moreover, since they are mainly used in construction industry, they become an important element in this growing sector. This makes the amount of crushed stone sold an important factor in the economic health of a nation or state.

There are numerous base material rocks that are used to produce crushes rocks. Some of them are limestone, sand, dolomite, gravel, iron, steel, expanded clay or shale, and perlite. The slag produced by these materials is generally used to create the stone.

Various uses of crushed rocks

  1. They are widely used in upgrading the infrastructure of a city or town. They are used in paving blocks and concrete for sidewalks, driveways, patios, homes, office buildings and paved roads as a base or sub-base material or in the process of cement manufacture.
  2. Crushed stones are mixed with a binder to make asphalt and tarmac. We all know these are used for things such as driveway fillers and extenders. They are very important for a particular technique for road construction called Macadam because the strength of the road depends upon the interlocking of the stones due to their angular shapes.
  3. They are used as a flux in blast furnaces to create liquid slag which, when cooled, becomes a stone material that is crushed and used as a construction aggregate.
  4. They are used as landscaping material to decorate gardens like paving a rocky path around flower beds or to add a boundary around the plot of land.