In recent years, with the demolition and reconstruction of cities, house reconstruction and other infrastructure construction, a lot of solid waste has been generated during the construction process. If it is not used, it will become garbage. Component analysis shows that it mainly includes mortar, concrete, bricks and stones, reinforced concrete piles, scrap metal, wood, packaging materials, etc., accounting for about 80% of the total garbage. This is also a considerable part of the recyclable resources. If it is properly handled and utilized, it can greatly reduce the waste of resources and form economic benefits. The country has also begun to increase the treatment of construction waste. On the one hand, policies are introduced to support the comprehensive utilization of construction waste, and on the other hand, the behavior of random stacking and abandonment is severely cracked down. The two-pronged approach has a particularly significant effect.

Construction waste is a common solid waste. According to the source of generation, construction waste can be divided into engineering slag, decoration waste, demolition waste, engineering mud, etc. According to the composition, construction waste can be divided into slag, concrete blocks, crushed stone blocks, brick and tile fragments, waste mortar, mud, asphalt blocks, waste plastics, waste metal, waste bamboo and wood, etc. The most recycled construction waste is concrete, rubble, brick and tile fragments, and scrap metal.

After being sorted and recycled by professional waste sorting equipment, construction waste has a very high comprehensive utilization value.

(1) Waste building concrete and waste brick and stone: produce coarse and fine aggregates, which can be used to produce concrete and mortar of corresponding strength grades or prepare building materials such as blocks, wall panels, and floor tiles. After adding curing materials, coarse and fine aggregates can also be used for highway pavement base.

(2) Waste bricks and tiles: produce aggregates, which can be used to produce recycled bricks, blocks, wall panels, floor tiles and other building materials.

(3) Slag: can be used for road construction, pile foundation filling, foundation, etc.

(4) Waste wood: wood that has not been obviously damaged can be directly reused for reconstruction, and severely damaged wood components can be used as raw materials for wood recycled boards or papermaking.

(5) Waste road asphalt mixture: can be directly used for recycled asphalt concrete in appropriate proportions.

(6) Waste road concrete: can be processed into recycled aggregate for the preparation of recycled concrete.

(7) Scrap steel, scrap steel bars and other scrap metal materials: can be directly reused or recycled.

(8) Waste glass, waste plastics, waste ceramics, etc.: can be used differently depending on the situation