The development status of construction waste crushing production lines: The traditional post-treatment path for construction waste is outdoor stockpiling or landfill. Generally, untreated construction waste is transported to the suburbs or countryside for outdoor stockpiling or landfill. What impacts will the arbitrary disposal of construction waste have? The main issue is the occupation of a large amount of land.
Development Status of Construction Waste Crushing Production Lines:
The traditional post-treatment path for construction waste is outdoor stockpiling or landfill. Generally, untreated construction waste is transported to the suburbs or countryside for outdoor stockpiling or landfill.
What impacts will the arbitrary disposal of construction waste have? The main issue is the occupation of a large amount of land. The occupied land can no longer be used for farming, and if buildings are to be constructed on it in the future, the investment cost will be higher.
Furthermore, it causes pollution to the underground soil and water. Due to the lack of proper classification, construction adhesives, coatings, and paints in construction waste are not only difficult to degrade but also contain harmful heavy metal elements. Long-term burial leads to groundwater pollution and destroys the soil structure. Many construction wastes containing heavy metals are directly buried in landfills, creating hidden dangers.
Arbitrary disposal of construction waste also affects the urban environment. With its complex composition, regional characteristics, and low added value, construction waste has become a challenge affecting China's economic and environmental development, as well as people's lives. Scientific and rational treatment and resource utilization are urgently needed.
Based on relevant experience, the first step is to reduce the source. Many buildings are demolished arbitrarily due to poor seismic performance or "achievement projects", resulting in an average service life of only 30 years for Chinese buildings, far lower than the 132 years in the UK and 74 years in the US. Therefore, to fundamentally reduce construction waste:
1. Strengthen the seismic performance of buildings to extend their service life, and minimize the generation and emission of construction waste from the source through project planning and material selection.
2. Put an end to blind demolition and construction, and strengthen the long-term planning of urban layout to avoid frequent changes.
Second, promote resource utilization to turn waste into treasure. According to statistics, the current recovery and utilization rate of construction waste in China can exceed 95%. For example, using construction waste to make bricks: compared with solid clay bricks, producing 150 million bricks can save 240,000 cubic meters of soil, consume over 400,000 tons of construction waste, and save 340 mu of land. In brick production, it can also consume 40,000 tons of fly ash, save 15,000 tons of coal, and reduce sulfur dioxide emissions by 360 tons.
The resource utilization of construction waste not only has significant environmental benefits but also considerable economic benefits. According to estimates, if the 5 billion tons of newly generated construction waste by 2020 can be converted into ecological building materials, it can create a value of up to 1 trillion yuan.
