Columbia University in the City of New York

Construction Trash

In recent years, along with the crunchy building, road and demolishing and building frequently collapse, a great number of construction trash is inevitable to be generated. Therefore, the garbage is produced at the speed of hundreds of millions of tons every year. Nevertheless, it can be seen everywhere that these building rubbish is buried simply and piled up arbitrarily that make the garbage siege approach to us quickly. Construction waste consists of unwanted material produced directamente or incidentally by the construction or industries. This includes building materials such as insulation, nails, electrical wiring, and rebar, as well as waste originating from site preparation such as dredging materials, tree stumps, and rubble. Construction waste may contain lead, asbestos, or other hazardous substances. Much building waste is made up of materials such as bricks, concrete and wood damaged or unused for various reasons during construction. Observational research has shown that this can be as high as 10 to 15% of the materials that go into a building (mobile crushing station), a much higher percentage than the 2.5 – 5% usually assumed by quantity surveyors and the construction industry. Since considerable variability exists between construction sites, there is much opportunity for reducing this waste. In recent years, China s economic situation is not optimistic. Bad phenomenon like rising prices, the national macro-control policy and excessive capacity is everywhere, and many companies fall into this crisis. Under this situation, the project of the transformation of villages and old city changing to new cities is still in full swing.

Thus construction waste quietly appears. According to authoritative statistics, in China, the number of construction waste have accounted for 30-40% of the total municipal solid waste. By 2020, China will add a shocking figure of new construction waste. The industry generally believes that the construction waste disposal is a very promising industry. With the continuous progress of science and technology, China s construction waste disposal technology is more and more mature, and a lot of construction waste disposal enterprises are on the rise to share a piece of cake. When the sustainable development It is becoming more and more important, piling up and landfills have gone against with life concept of creating low carbon, environmental protection and energy conservation and emission reduction. Hence, it is urgent to dispose of the trash during development. So it comes to us how to deal with it. The illegal dumping of construction waste causes a great impact on people’s life, so the construction waste utilization problem has got great concern of the community. Local governments are actively promoting the construction debris crushing to renewable building materials and national policies also introduces relevant policies and measures to prevent the construction waste polluting the environment. Resourceful recovery of construction waste has been included to the 12th Five-Year Plan and it will be a new trend of in the field of building energy-saving. Resourceful recovery of construction waste has not only great environmental benefits, but also huge economic benefits. On the disposal of the construction trash, Henan Hongxing has done a comprehensive analysis of the garbage. It has developed a specialized mobile crushing station which is able to transform rubbish into gold answering the environmental requirements.

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