Pilot pilot pilot project slogan

In order to thoroughly implement the Scientific Outlook on Development, it is guided by the requirements of "three modernizations" (reduction, resource utilization and harmlessness); Develop knowledge economy and circular economy, reduce energy consumption and improve the utilization rate of construction waste; Follow the principle of combining government-led and market-oriented operation, scientific planning, pilot first and rational layout; According to the Regulations on Urban Construction Waste Management and the Implementation Measures of Kunming Municipal Domestic Waste Management, a pilot project of comprehensive application of construction waste in municipal engineering construction was carried out.

1 Necessity of running the project

1. 1 Creating demonstration projects is the need to practice "building a resource-saving and environment-friendly society"

Using construction waste to replace or partially replace some building materials in municipal engineering can effectively solve the dilemma of difficult construction waste disposal and difficult road construction materials, and achieve two goals, which not only saves social resources, but also protects the natural environment. Therefore, the construction of municipal engineering with recycled construction waste is the need of "building a resource-saving and environment-friendly society".

1.2 the need to implement Scientific Outlook on Development and promote the technical progress of municipal engineering and highway construction.

As far as Yunnan and Kunming are concerned, the municipal engineering construction technology has made unprecedented development. However, compared with the whole country, many technologies are in a follow-up state. At present, Shanghai, Tianjin, Nanjing, Xi, Shenyang, Hefei, Chengde and other places have carried out pilot projects of using construction waste in urban municipal engineering and highway construction, and published related articles. Referring to the existing research results, the pilot project of municipal construction of construction waste was carried out in Kunming, and the construction technology suitable for Yunnan's climate, soil and environment characteristics was developed through source innovation. While keeping up with the relevant research in other parts of China, we can establish relevant complete sets of technologies and formulate relevant rules and manuals to lead the development of this technology.

1.3 needs of developing circular economy and promoting social and economic development through technological innovation

The resource utilization of construction waste in municipal engineering buildings can save the cost of garbage transportation and disposal, reduce the cost of building materials purchase and transportation, and consider the cost of garbage recovery process. According to the conclusion of domestic pilot projects, the total construction cost can be reduced. Even if the construction cost is limited, the utilization of resources reduces the damage to the environment and the occupation of garbage, and weakens the interference to traffic, which is also profitable in social and economic aspects. Therefore, the pilot project is also aimed at developing knowledge and circular economy, which will play a positive role in promoting municipal engineering and highway construction and even the economic development of the whole society through technological innovation. The prospect of popularization and application in Kunming, Yunnan and even the whole country is very broad.

2 Feasibility of the project (policy, organization, economy, technology and environment)

2. 1 policy

Kunming has also issued corresponding construction waste disposal policies, which laid the foundation for the implementation of the project. These policies and regulations mainly include: Measures for the Management of Domestic Waste in Kunming (2006), Measures for the Implementation of Urban Construction Waste Management in Kunming (20 10) and Work Plan for Resource Treatment of Construction Waste in Kunming (20 10).

2.2 Project organization

2.2. 1 At present, the pilot project focuses on replacing traditional road building materials with recycled construction waste; Master the production and processing technology, construction technology and quality control of construction waste recycled materials in road construction. While reducing the cost of urban construction waste treatment and consumption, it also reduces the cost of road construction. But also can quickly digest a large amount of construction waste and improve the resource utilization rate of construction waste.

2.2.2 There are many technologies and products for resource utilization of construction waste, and there are various technical approaches. After the completion of the demonstration project, it can be used as an incubator for new technologies and new products of construction waste resource utilization, which can reduce the exploration cost by reducing detours and play a guiding role in the construction waste resource utilization industry.

2.2.3 Relying on the strong scientific and technological strength of Yunnan Scientific Research Institute, we will speed up the progress of technical research, product performance and process standards.

2.2.4 The unit in charge of this project is Kunming Urban Management Comprehensive Administrative Law Enforcement Bureau, which is directly responsible for the administrative licensing of construction waste disposal, removal and dispatching. The approval of construction waste distribution and allocation is conducive to coordinating the raw materials of this pilot project and ensuring the smooth implementation of the proposed pilot project.

2.3 Technical aspects

Using construction waste to build municipal roads is a technical fusion of two aspects, one is to prepare recycled materials from construction waste, and the other is road construction technology. In addition, the technology of producing permeable bricks, baking-free bricks, solid bricks, hollow bricks, colored Dutch brick bricks, square bricks, grass-planting bricks, kerbs and other bricks from construction waste has matured, and the combination with road construction is to use these bricks in appropriate positions.

2.4 Environmental aspects

There are many years of experience in the treatment of construction waste, and no waste residue is discharged during the production process. By taking appropriate technical measures, noise and dust can be effectively controlled to meet the requirements of environmental assessment.

2.5 Pilot projects and sources of construction waste

The unit in charge of the pilot project is responsible for the proposed 5-8 km test section, selecting the recent mobile standardized construction waste resource treatment site and reporting it to the government for approval and implementation; The competent unit of construction waste is directly responsible for the relevant administrative examination and approval of construction waste, which is conducive to the deployment and transportation of raw materials for the pilot project, the implementation of the temporary transitional normative construction waste resource treatment field, and the long-term transitional construction waste treatment field to ensure the smooth implementation of the pilot project.

3. Benefits of the pilot project

3. 1 social benefit: the implementation of the pilot project can play a good demonstration role. Exploring the reasonable operation mode of reducing, recycling and harmless construction waste and the industrialization of comprehensive utilization of construction waste will help to fundamentally solve the problem of urban construction waste, improve the urban sanitation environment, and have an important positive impact on Kunming's work of creating a "national environmental protection model city".

3.2 Environmental benefits: According to the annual consumption of urban construction waste 1 10,000 tons, the land for garbage disposal can be saved 1 10,000 mu; The aggregate produced by the project replaces natural aggregate, which can reduce the exploitation of non-renewable minerals; Replacing clay bricks with some products in this project can save more than 200,000 cubic meters of earthwork, about 65.438 million mu of cultivated land and 20,000 tons of standard coal, and reduce the emission of harmful gases such as carbon dioxide and sulfur dioxide. The principle of proximity can alleviate the urban traffic pressure and environmental pollution caused by traffic.

3.3 Economic benefits: The construction waste recycling project can reduce the cost of construction waste treatment and road construction. Thereby promoting the development of building materials, real estate and environmental protection industries and promoting the rapid development of regional economy.

3.4 Technical Benefit: The pilot project provided theoretical and experimental data for the application of recycled construction waste materials in road construction, and formulated local standards such as "recycled construction waste as road water stabilizer", which contributed to the innovation of building materials and the industrialization of construction.

3.5 The pilot project includes three construction stages. 1) The mobile screening and crushing station of 180t/h will be built in the first stage, and the crushing and screening production line and block production line will be built in the transition station; 2) In the second stage, expand the mobile station and the transition station, add a 180t/h crushing and screening mobile station and a fixed production line, and complete the construction of supporting facilities such as office area and R&D center in the transition station; 3) In the third stage, a fixed standardized construction waste recycling yard will be built in the outer suburbs.

The overall goal of the pilot project construction is to innovate at the source and quickly absorb it on the spot. The first stage mainly realizes the popularization and application of new materials in municipal road engineering, including foundation treatment, subgrade filling and pavement construction. In the second stage, through source innovation, it will be popularized and applied in landscaping, housing construction, municipal pipelines, municipal squares, water supply and drainage, water conservancy projects and so on. The third stage is to realize the transfer of construction waste and recycled materials. At present, unformed construction wastes and semi-finished products are temporarily stored or made harmless and used to create new ecological parks.

The first is the systematic problem of comprehensive application of construction waste.

The pilot project of comprehensive application of construction waste recycling materials in road engineering is a systematic project, involving material source, crushing and processing, construction and quality evaluation. It needs the cooperation of government departments, scientific research institutions, investment, management, construction, demolition and garbage removal enterprises. The success of the pilot project depends on whether the whole system can run orderly and effectively as expected. Therefore, we must follow the model of government-led, market-oriented operation and the participation of the whole society, strengthen the leadership, coordination and support of government departments, take into account the interests of all parties, and make the road construction waste recycling on the market road through pilot projects.

Second, the immaterial factors of road construction quality.

The construction quality of completed roads is not only affected by the performance of recycled materials, but also by the construction organization in the construction stage, the construction workers' understanding of the quality of building fillers, the management level and responsibility of supervision engineers in the project implementation stage. Failure to meet building quality standards does not mean that there is a problem with recycled materials. Therefore, in construction management, we should comprehensively strengthen the monitoring of construction organization and improve the management level and responsibility consciousness of supervision engineers.

Three, the optimal utilization of various types of building construction waste.

Different structures have different components of construction waste, and different wastes can be used in different locations of roads and in different ways. Therefore, for buildings with certain structures and specific roads, there should be an optimal method for the classification and utilization of construction waste. This optimization problem should also be studied in depth to obtain the maximum economic benefits.

The establishment of this project can bring good social and environmental benefits, alleviate the environmental and traffic pressure brought by construction waste to the city, save a lot of land and non-renewable resources, and provide a lot of building materials for road construction in Guandu District and Kunming City, which is conducive to promoting the formation of a new industrial chain and promoting regional economic development.

Conclusion: The implementation of the pilot project will solve the problem of recycling urban development resources, contribute to the sustainable development of Kunming, and build an international gateway and bridgehead city open to the southwest; Guide the development of construction waste resource industry, and make the construction waste resource utilization industry embark on the road of science and technology and standardization; Promote the development of innovative technologies for recycling construction waste, improve the construction technology level and comprehensive competitiveness of enterprises and research institutes in Yunnan, and make new contributions to the follow-up and institutional technology development.

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