In recent years, with the urban demolition and reconstruction, housing reconstruction and other infrastructure projects, a lot of solid waste has been generated during the construction process. If it is not utilized, it will become garbage. Composition analysis shows that it mainly includes mortar, concrete, brick and concrete, reinforced concrete pile heads, scrap metal, wood, packaging materials, etc., accounting for about 80% of the total amount of garbage. This is also a considerable amount of recyclable resources. If properly handled and utilized, it can greatly reduce resource waste and generate economic benefits. The country has also begun to increase the disposal of construction waste. On the one hand, policies have been introduced to support the comprehensive utilization of construction waste, while on the other hand, efforts have been made to crack down on disorderly dumping and disposal. The dual measures have yielded particularly significant results.
Construction waste is a common solid waste, which can be classified into engineering debris, decoration waste, demolition waste, engineering mud, etc. according to the source of production. Classified by composition, construction waste can be divided into waste soil, concrete blocks, crushed stones, brick and tile fragments, waste mortar, mud, asphalt blocks, waste plastics, waste metals, waste bamboo and wood, etc. The construction waste treatment and reuse mainly include concrete, crushed stones, brick and tile fragments, and scrap metal.
What is the value of sorting and recycling construction waste?
After being sorted and recycled by professional garbage sorting equipment, construction waste has a very high comprehensive utilization value
(1) Abandoned building concrete and abandoned bricks and stones: produce coarse and fine aggregates, which can be used to produce concrete, mortar or prepare building materials such as blocks, wall panels, floor tiles, etc. of corresponding strength grades. After adding solidified materials to coarse and fine aggregates, they can also be used for highway pavement base.
(2) Waste bricks and tiles: Used for producing aggregates, which can be used to produce recycled bricks, blocks, wall panels, floor tiles and other building materials.
(3) Slag soil: can be used for road construction, pile foundation filling, foundation, etc.
(4) Abandoned wood: Wood that has not been significantly damaged can be directly reused for rebuilding buildings, while severely damaged wooden components can be used as raw materials for recycled wood panels or papermaking.
(5) Abandoned pavement asphalt mixture: can be directly used for recycled asphalt concrete in appropriate proportions.
(6) Abandoned road concrete: can be processed into recycled aggregates for preparing recycled concrete.
(7) Scrap steel, scrap steel bars, and other scrap metal materials can be directly reused or recycled for processing.
(8) Waste glass, waste plastic, waste ceramics, etc.: use them differently depending on the situation
