The comprehensive utilization of construction waste is divided into three stages: “low-level stage, intermediate-level utilization, and advanced utilizationâ€. Among them, “low-level utilization†refers to on-site sorting and utilization, general backfilling, etc., accounting for 50%~60% of total construction waste. "Intermediate use" refers to the use as a basic material for buildings or roads, processed into aggregates by treatment plants, and then made into various building bricks, accounting for about 40% of the total construction waste. Large and medium-sized cities in the United States have construction waste treatment plants that are responsible for the disposal of construction waste in the city.
“Advanced utilization†refers to the reuse of construction waste to cement, asphalt, aggregates, etc. In Japan, processing plants that treat construction waste in an "electrolytic" manner have been established, with a production scale of up to 100 t/h. The construction waste generated during the construction process is required to be disposed of in a place with “recycling resourcesâ€. At present, mature “advanced use†technology has been formed to treat construction waste. Judging from the current situation of construction waste disposal in China, the stage of “advanced utilization†of construction waste in China has arrived.
Zhengzhou Dingsheng no dust and oil, electric dual-purpose crawler type mobile crushing station broken concrete site
Many of the waste in construction waste can be reused as a renewable resource after being separated, rejected or crushed. Comprehensive utilization of construction waste is an effective way to save resources and protect the ecology. In this regard, Japan, the United States, Germany and other developed countries have carried out relatively early, providing us with many advanced experiences and treatment methods.
The United States provides reference value for the "advanced use" of construction waste. A US company has developed a microwave technology to recycle asphalt concrete pavement waste. The recycling efficiency is as high as 100%, and its quality is high, and the new asphalt concrete road fabric is used. No difference, and low cost, while reducing waste emissions, protecting the environment, saving waste management and disposal costs.
At present, China's construction waste resource utilization and application of non-dusting oil and electric crawler type mobile crushing station is Zhengzhou Dingsheng Engineering Technology Co., Ltd., which adopts the advanced technology research and development of Austrian Standard Company. The performance is extremely advanced, compared with similar products, no The dust crawler type mobile crushing station is equipped with dust suppression seals, cloud dust seals, dust suppression machines and other advanced dust suppression systems to suppress dust pollution from the source, solve the problem of dust on the broken scene, and achieve no dust-free operation; oil and electricity mix two The design breaks the dependence on the power when using the mobile crushing station. It can not only smash the construction waste on the demolition site after the water cuts, but also break the ore into the deep mountain, which is completely uncontrolled by the site conditions; The remote control can be used to operate the equipment transfer operation, which is convenient and quick, solves the problem that the tire-type mobile crushing station is inconvenient to move, and the transition operation takes time and effort; the main machine has a steel shearing device, and the crushing efficiency is high, and the same model is truly achieved. Low energy consumption, high output, and far lower prices than imported crawler-type mobile crushing stations.
Zhengzhou Dingsheng has no dust and oil, electric dual-purpose crawler type mobile crushing station to break the construction waste site
In order to promote the improvement of the level of construction waste recycling in China, the following aspects must be strengthened:
1 Strengthen scientific research and improve the technical level. Scientific research is the basis for the recycling of construction waste. Without proper technical solutions, the recycling of construction waste cannot be discussed. The recycling technology of foreign construction waste has matured, and China has just started in this aspect. It should carry out comprehensive and systematic research and development work, and propose a strategy and technical plan for building waste recycling in line with China's actual situation. Scientific research should focus on methods of building waste reduction, construction waste recycling and utilization methods, market-based measures for recycled building materials, analytical methods for recycled materials and environmental compatibility, technical standards and specifications for recycled products, and recycling technologies. Economic rating, etc.
2 Strengthen legislative work to provide legal protection for the recycling of construction waste. It is forbidden to land construction waste with regenerative value, and correspondingly categorize the recycling and stacking of construction waste. The discharge unit must allocate corresponding treatment facilities or pay higher processing fees, and entrust professional institutions to handle and use its construction waste. The state should give preferential treatment to taxation policies for materials or products produced from construction waste. For dedicated construction waste recycling institutions, the state should provide corresponding financial subsidies to ensure their normal operations. Once the relevant laws on construction waste recycling are promulgated, the law should be obeyed through strict supervision and enforcement, so that the law is prohibited, laws must be followed, and violations must be investigated.
3 Strengthen publicity and education work to raise people's resources and environmental awareness. It is necessary for relevant personnel to understand that construction waste is an available resource, vigorously promote and promote the latest technologies and techniques for recycling of construction waste resources, and encourage the whole society to use recycled building materials or products.
4 Increase policy support. The government should guide, support and increase the comprehensive utilization of construction waste from the policy. The government should play a leading and coordinated role in rationally distributing waste treatment plants and turning abandoned building materials into useful materials.
Editor in charge: Zhang Qiqi
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