The traditional methods for handling construction waste mainly include stacking, landfilling, and backfilling, but these methods can have a significant impact on the environment, such as soil pollution, groundwater pollution, and air pollution. The dumping and landfilling of construction waste require a large amount of land, and the release of toxic and harmful substances can alter the physical structure and chemical properties of the soil, causing soil pollution; Polluted soil washed away by rainwater can form leachate into water bodies, which can easily cause groundwater and surface water pollution; The construction waste piled up in the open air is more likely to cause dust, and the large amount of exhaust emissions and dust caused by road spills during the transportation of waste trucks exacerbates air pollution.

In recent years, the recycling of construction waste has become a new attempt, which involves processing and reusing it. Metal waste, scrap steel bars, scrap iron wires, scrap electrical wires, etc. can be sorted, reheated, and processed into metal products such as steel; Waste concrete can be processed through crushing, screening, and other processes to produce recycled aggregates for filling materials in highway subgrades and walls. It can also be used to produce products such as porous bricks, hollow slabs, hollow blocks, and cement raw materials; Waste wood can be used to manufacture synthetic boards; Asphalt can be regenerated through recycling.

Concrete is currently the most valuable recycled part of construction waste. Recycled aggregates generated from waste concrete are highly favored by the market due to their high strength and low production costs. Recycled aggregates, after being mixed and rolled according to a certain grading, have a high foundation bearing capacity and can be directly applied to soft and weak foundations, shaft backfilling, roadbed cushion layers, water treatment, site dust suppression and other projects; It can also partially or completely replace natural aggregates to produce recycled inorganic mixtures, recycled bricks, recycled concrete and other products.

To achieve the environmental protection of construction waste, it is also necessary to reduce the amount of construction waste generated at the source, vigorously develop and promote new building technologies and processes that save energy and reduce consumption, and adopt structural designs that minimize the generation of construction waste; Increase investment in the comprehensive utilization of construction waste, limit the use of natural aggregates and stones, introduce corresponding preferential policies, encourage the use of recycled materials, alternative materials, and easily recyclable materials, etc., and minimize the generation of construction waste from the source. At the same time, relevant departments can vigorously promote the application of recycled products, promote circular utilization, call on municipal, landscaping, transportation, water and other engineering projects to take the lead in using recycled construction waste products, and encourage social investment projects to use recycled construction waste products.

Through the recycling of solid waste resources, the utilization rate of construction waste can be significantly improved, effectively alleviating the transportation and spatial storage problems of construction waste. It has high flexibility, low carbon energy consumption, and is close to the ideal environmental protection requirements of almost zero pollution and zero emissions, contributing to the country's achievement of the "dual carbon" goal.