The Practical Study And Environmental Evaluation Of Crumb Rubber Modified Asphalt

With the development of the auto industry, the amount of cars has increased, so the accumulation of waste tires leading to "black pollution," has become the environmental problems around the world. After '90s of the 20th century, the comprehensive utilization of waste tires has become the primary means of handling waste tires. And it pays more attention to the content that scrap tires into a fine powder and using in asphalt production of large quantities of scrap tires is an effective way to enable the waste valuable. Not only Crumb Rubber Modified Asphalt could improve high and low temperature and anti-aging properties, but also could reduce road noise and improve safety performance and other unique advantages.According with the "Rubber Modified Asphalt Applied Research" project charging with the transportation apartment of Jilin province, the paper studies the properties of asphalt mixtures of rubber powder from the structure of rubber powder and bituminous material application and suited to the production of waste rubber modified asphalt preparation. Because after the high-speed shearing device If the colloid mill processing coupled with the rubber powder in the course of processing a further rise in the financial and pieces spread more evenly distributed in the asphalt, the better the results, using wet manufacturing modified asphalt. Laboratory tests, the rubber powder content on the properties of asphalt. 12%, 15%, 18%, 20% rubber powder content of the milk. Pilot project includes penetration, extension, softening point, Marshall, Marshall and thawing split immersion test. The results showed that the addition of rubber powder, raising the effective temperature properties of asphalt mixtures and low temperature performance. Rubber asphalt softening point than asphalt and asphalt Shell has been noticeably improved, the rate of increase for 1:2.2 Penetration Index PI values increased, modified asphalt flexibility to enhance and improve the sensitivity of temperature.Influence of low-temperature ductility modified asphalt over asphalt and Shell have greatly improved. Extension of 25°C was significantly decreased, indicating that modified asphalt enhance high temperature stability. With the increase in rubber powder content of the mixture gradually improving high temperature performance. Rubber adding greatly raised the temperature properties of the asphalt mixture (Anti-track capacity). Asphalt rubber powder made by adding water to the stability of some attenuation. From these results, which amount to 15% of the overall optimal modification, as the ideal formula for the laying of the road test.Test sections of Changchun - Siping Expressway, the 500-meter long road test. Meanwhile the head powder 40-10 mixed, the parent SBS modified bitumen processing. Based on the"Road extraction experiments"we test the effect of the rubber asphalt comprehensive evaluation performance comparison with the other two for the road. Test results show that the proportion of papers selected to participate in the powder (80±15% of current rubber powder). The trial of the three modified asphalt road is the best effect, which basically reflects the laboratory test results. SBS modified bitumen processing the scene with the mother in terms of contrast from the single perspective, the low temperature performance of a rare shortage However, mixtures, the same low temperature, high temperature performance but it is much better than SBS modified bitumen mother.With the increase in vehicular traffic increased speed and road traffic noise is becoming a serious problem, has become one of the main sources of pollution along the highway. Noise as a traffic noise pollution, air pollution, water pollution, environment has become a crime against humanity as a whole. How to reduce road traffic noise environment sector has become an increasingly important issue. Low noise road surface is one of the important means to reduce road noise, the paper on the causes of road noise. Structural properties of asphalt and rubber powder on impact analysis and electron microscopy using photographs and other means Noise reduction of the rubber asphalt. Damping gap absorption from the two aspects of the rubber and asphalt explain the principles of noise reduction. SBS sections of the test section and noise compared with the testing and evaluation of rubber asphalt to verify the level of noise reduction. The results showed that an average of 1.5 dB noise, when the speed reached 120km/h, a maximum of 2 dB noise down.With the rapid development of China's economic construction and improving the people's living, people-centered, sustainable development of a conservation-minded building a harmonious society has become the main theme of national policy development. Environmental issues is one of the key issues in the development of a harmonious society, and how to conserve energy, how to achieve energy recycling. how to maintain a sound ecological environment and living environment, which has become increasingly urgent. Traffic environment is one of the key environmental issues and performance requirements of the people on the road are increasing. how to improve the performance of the use of roads to reduce traffic noise. reduce road damage to the environment will also become the focus of the transportation department. Reduce paper consumption Scrap Tire black pollution. the development of environment-friendly low-noise pavement and to improve road safety and reduce road construction damage to the environment and other aspects of waste rubber modified A comprehensive evaluation of the environmental benefits of asphalt. Waste rubber modified asphalt road will not only effectively improve the performance of asphalt. but with good social and environmental benefits, transportation and environmental sectors will be the focus of future development directions.