Construction waste is a product of the accelerated metabolism of the construction industry. Most construction waste is solid waste, usually something that is generated during the construction or maintenance of an old building, during the demolition process. Buildings of different structural types produce different waste contents, which are mainly composed of concrete, mortar, bricks, steel bars, muck and other lightweight materials such as wood, wood, and plastic. According to relevant statistics, in 2014, China's urban construction waste output reached 1.5 billion tons, and continued to soar at an annual rate of 10%. It is expected to reach about 2 billion tons by 2015, but the construction waste disposal rate in China is only about 5%, and the treatment level in developed countries is 90 95. The gap is huge. At present, the main measure of construction waste disposal in China is to landfill the ground, but it has been very harmful for a long time.
1. As far as society is concerned: construction waste stacking occupies a large amount of land, 10,000 tons of construction waste is piled up, covering an area of 2,000 tons and 5 acres. Underground landfills cause harm to groundwater and soil structure, and problems such as omissions, dust, and dust in the process of removal and stacking also cause serious environmental pollution.
2. From an economic point of view, a large amount of untreated construction waste consumes a large amount of construction funds such as land requisition fees and garbage removal freight.
Therefore, from the above analysis, it can be seen that finding a way to turn construction waste into treasure and garbage has huge social and economic benefits. Construction waste** is the way for China's sustainable development and the realization of circular economy. The first construction waste is the process of turning construction waste into treasure. For example, in developed countries, construction waste is used as a raw material for the production of concrete and bricks, in addition to landfills. Some researchers pointed out that construction waste is a treasure, and after effective development, the utilization rate of construction waste in China can reach more than 95%.
The classification and treatment of building waste is mainly the reusable classification of waste steel bars, metal, wood, etc. Construction waste is made into recycled bricks. As a traditional building material, clay brick can no longer meet the needs of the development of the times. The use of construction waste to produce new building materials such as recycled bricks can not only meet the market's requirements for environmental protection of building materials, but also consume a large amount of construction waste, such as 100 million standard bricks can consume more than 400,000 tons of construction waste, saving 160 acres of garbage. Construction waste is produced from recycled aggregates. One of the main ways to recycle construction waste in China is to use construction waste to produce recycled aggregates. After the initial cleaning of construction waste, the steel bars and wood are classified, and then the masonry and cement concrete blocks are crushed into aggregate through crushing equipment, and impurities are removed by vibrating screen to form building materials with certain particle size requirements. Then, cement, fly ash and other auxiliary materials are added to the raw materials, some water is added, and it is mixed into concrete to produce different building products and road construction products, which can replace ordinary sand and gravel in road and other infrastructure construction.
Construction waste can realize the resource utilization and harmlessness of construction waste, reduce economic benefits, social benefits and ecological benefits. The mobile crushing plant realizes the close treatment of construction waste, and provides construction waste treatment users with simple services, effective and low cost of engineering operation hardware facilities. At the same time, according to the different needs of different customers, the mobile crushing plant can meet the requirements of coarse crushing, medium and fine crushing, ultra-fine crushing, sand making, sand washing, shaping, screening and other stages, and has become an ideal equipment choice in the field of construction waste treatment.