Construction waste production
Bricks and tiles in construction waste can be reused after cleaning. After brick, stone, concrete and other wastes are broken, they can replace masonry mortar, plastering mortar, waste brick, brick, concrete crushing screen grading, low standard recycled aggregate concrete mat, foundation reinforcement, road engineering mat, indoor floor, floor mat, non bearing concrete hollow block, concrete hollow partition, autoclaved fly ash brick, etc.
In addition to being used as formwork and building materials, the waste wood in construction projects can also be used as raw material or fuel for papermaking, or medium density fiberboard or artificial wood.
Scrap metal and steel are sorted and sent to the iron and steel plant or non-ferrous metal smelting plant for recycling. After sorting, concentration and recycling, it can be reprocessed into various specifications of steel.
The waste glass is classified and sent to the glass factory or glass-ceramic factory for production. The construction wastes such as waste plastics and waste ceramics are used according to different conditions.
The waste pavement asphalt mixture can be directly used for recycled asphalt concrete in appropriate proportion. Foundation pit soil and slope soil are produced in the sintering brick plant. The crushed stone is crushed, screened and cleaned to make concrete aggregate.
Construction waste has good permeability and is a rare building material with good water stability in highway engineering; In the humid environment, construction waste, as the foundation cushion, has little change in strength and is an ideal building material with high strength and good stability; Construction waste can also be used for railway subgrade, weak soil subgrade treatment, silty soil subgrade, clay subgrade, silt subgrade, water subgrade, etc., In addition, construction waste can be used for the stable soil foundation, granular improved soil foundation, backfill foundation, foundation replacement treatment and ground cushion of construction engineering foundation and foundation, and also can be used for the structural layer and stable layer of airport runway, city square, street and road engineering.
The comprehensive utilization of construction waste is of great significance to save resources, improve the environment, improve economic and social benefits, and realize the optimal allocation of resources and sustainable development. Call on the whole society to pay attention to and participate in the reduction, recycling and harmless treatment of construction waste, and enhance people's awareness of resource conservation and environmental protection. There are many ways to comprehensively utilize construction waste. According to the specific local conditions, work shall be carried out according to local conditions and measures shall be taken to ensure the sustainable development of the construction industry.
