Construction waste mainly refers to the waste generated during the construction process when the old buildings and buildings are demolished during the transformation of the old city. The main components of construction waste include yellow sand, stones and blocks, sawdust, shavings, packing boxes, bags of various decorative materials, scattered mortar and concrete, broken bricks and broken concrete blocks, soil, Waste soil, waste steel bars, scrap iron wire, all kinds of scrap steel fittings, metal pipeline waste, waste bamboo, etc. These materials account for about 80% of the total construction waste. Different types of construction sites, the waste composition ratio is slightly different; construction management level, the amount of waste varies greatly.
On the one hand, as China’s economy continues to develop steadily, industrialization and urbanization are accelerating, and the construction waste generated from the construction, expansion, demolition, or maintenance of buildings or structures in cities across the country is bound to increase, and cities will inevitably have to plan for new construction waste. In the contradictions arising from the protection of the environment and the development of the economy in the material reception site, do not carry out simple landfilling of construction waste. Instead, we must change our minds and plan, design, and operate comprehensive utilization of new construction waste. The construction of Nana Farm has become an industrial waste base for the comprehensive utilization of construction waste to reduce the increase of construction waste and further increase the overall utilization rate of construction waste. On the other hand, China is in a critical moment of vigorously developing a circular economy, implementing independent innovation, and comprehensively advancing scientific development.
According to statistics, more than 4 million tons of construction waste is generated in Dujiangyan after the earthquake. If these construction wastes are randomly stacked or buried, they will not only pollute the soil and water, but also occupy a lot of space. If a construction waste processing equipment production line is designed, annual processing is required. Construction waste is as high as 400,000 tons, which means that 400,000 tons of recycled aggregate will be produced, and some of the raw aggregates can be made into environmentally friendly bricks. More than 100,000 renewable environmental protection bricks will be born.
The choice of construction waste disposal methods is of utmost importance. A good way is to treat building construction waste more effectively and efficiently, which greatly saves construction waste disposal costs.
The research and practice of the industrialization of building waste resources has realized the comprehensive utilization of construction waste, reduced the increase of construction waste, and further increased the overall utilization rate of construction waste.
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