Aggregates are materials of rocky origin, extracted from river deposits such as natural sand, gravel and crushed stone or crushed by hard rock formations.
Crushed aggregates are mixed with hydraulic binders such as cement to obtain concrete, mortars and plasters. They are also used as such for other engineering works such as roads and foundations for other structures.
Aggregates provide better fluidity in ready-mix concrete production and improve its mechanical properties, to counteract plastic mass shrinkage and reduce hydration heat.
Through crushing, shaping, shielding and washing processes, aggregates can be processed to obtain products of different sizes and characteristics, which can be divided into sands, intermediate aggregates and large aggregates.