Stone aggregate is merely crushed stone with a few other components. There are many practical applications for aggregate. Crushed stone is widely used in the construction industry. This material is employed in almost every road, driveway and building project.
Almost any type of stone available can be used in the creation of aggregate. Most aggregates consist of sand, gravel and crushed stone. The crushed stone component of aggregates accounts for approximately 85 percent of its weight.
Aggregate Crushing Operation
Aggregate crushing can be processed in three stages according to final products applications: primary crushing, secondary crushing and tertiary crushing. The stone materials from quarry extraction will be fed into primary jaw crusher for initial size reduction. The output of the primary crusher is fed to a secondary crusher. Tertiary crushing is usually performed using cone crushers or other types of impactor crushers. Oversize material from the top deck of the sizing screen is fed to the tertiary crusher.
Between each crushing stage, there will be a feeding hopper and screening machine, the material is transported to fixed or vibrating scalping screens by gravity, belt conveyors, hydraulic pump, or bucket elevators. The scalping screens separate the oversize material from the smaller, marketable sizes.