Discarded tires big role for road noise out of Sony

A few days ago, the Chinese Association for the use of tire renovation of the road with the Ministry of Science Institute held a joint production of rubber tires, plastic application of renewable technologies seminar. From the meeting was informed that in 2010, China's tire production will reach more than 300,000,000, and the emergence of discarded tires will reach more than 200,000,000, its weight up to 5,200,000 tons.

What does it mean huge numbers

China Association for the use of tire renovation of a long-Yun Kang rule that with the rapid development of China's automobile industry and increase the use of tires, scrap tires per year in order to generate double-digit rate of growth, how to make full use of discarded tires resources to enhance the level of use is Top priority. Powder as raw materials for one of the modified asphalt in high-grade highways, urban roads in the success of the initial test for the powder to open up an important channel for the application.

Developed using the powder modified asphalt of the road and the laying of the application shows that powder modified asphalt is a new kind of road construction materials, they have the advantage of traditional asphalt pavement in the summer heat Fanyou, drum kits, cold winter weather cracking defects , Heat, cold, and enhance anti-skid and improved the safety factor, especially suitable for high-grade highways. Compared with ordinary asphalt roads to reduce noise 2-3 db, is the solution to urban roads to reduce noise one of the main; ordinary asphalt, can significantly extend the useful life, thus reducing maintenance costs; to reduce the cost of road construction, At present, the use of imported SBS (a synthetic material for the thermoplastic elastomer) more than 20,000 yuan a ton, and the use of rubber tires produced only 3,000 yuan a ton or less, as well as cut down a rubber resources, reduction of environmental pollution. Practice has proved that the developed countries, with the laying of rubber modified asphalt road has been a good social environment and comprehensive economic benefits. Need for the competent authorities as soon as possible at the local, national standard. To give tax concessions to the industry.

Application prospects

Highway Institute of the Ministry of Science Research Group Li Jiang that the United States, discarded tires will be processed into powder in the rubber industry in the use of the road, discarded tires are dealing with one of the main.

At present, China is in the rapid development of highway, road use and improve performance, extend the service life of the road, to save construction investment, China's highway industry is facing urgent problems. Due to China's vast, climate and natural environment is very complex, plus the widespread phenomenon of overloading transport, road pavement, particularly asphalt concrete surface made of a high technical requirements, the tire rubber powder will be used for highway construction, to solve The problem currently facing one of the effective ways.

In the spring of 2001, the Ministry of Science Institute of Highway for the first time in the steel bridge deck pavement used in 30% (as opposed to the amount of asphalt) of the rubber powder, four decks weathered the test of the summer of excess traffic, remained in good condition, To maintain a good indicator of performance. In the same year set up by the Ministry of Communications, Ministry of Road Research Institute, presided over the "waste rubber powder used in the construction technology research," Western scientific research projects, asphalt rubber and rubber powder mixture of asphalt pavement performance and mechanical characteristics to carry out a comprehensive, Experimental research on the system. Test results show that the application and, because of their flexible rubber powder performance, asphalt rubber mixing flour mixture, the mixture marked increase in the flexibility and resilience for the performance of the deformation increases, reduced modulus; improved asphalt mixture stress The proliferation of stress and to absorb the effect of giving rubber asphalt concrete powder good noise reduction effect, with the speed of the increase in noise reduction was more significant. Road test and application engineering entity to be effective for China's future road projects in large-scale popularization and application of rubber powder technology laid the foundation.

An urgent need to develop technical standards

But more broadly to promote the technology, currently there are still some problems. First of all, as soon as possible to develop technical standards. Rubber powder as the basic raw materials, the quality of its bearing on the stability of the rubber powder in the application of the prospects for the road sector. Waste tire rubber powder composition of the complex, its mixture of asphalt and performance may differ from each other. Therefore, from both technical and economic aspects of the comprehensive evaluation to identify suitable for road use rubber powder technology indicators, including rubber powder processing methods; appropriate mixture of asphalt and rubber powder used by the heads of several area; rubber powder source of the recommendation Tires; rubber powder in the provisions of the active ingredients; rubber powder in the fiber content, such as reasonable.

The use of rubber powder in the other technical points, is rubber and asphalt mixture design and construction of the technical guide. Due to various parts of the state of our country are not the same, the guide should also be in line with local conditions. In both on the basis of research results, according to regional traffic and environmental characteristics, to carry out rubber and asphalt mixture performance of the research, the development of technical specifications, design standards, guidelines for design and construction of the current rubber powder in the application of the road works In the near future.

The experts pointed out that because of the limitations of professional, the way rubber powder by the appropriate technical rubber powder industry and the development of a joint highway industry.