Asphalt Mixture Anti-sliding Performance Evaluation Research Based On The Contact Area Between Tire And Road

Against sliding problem of asphalt has become a technical problem in road engineering area, and the key point to against sliding is the contact characteristics between tires and asphalt road. Therefore, this report mainly focus on the research of contact characterizes between tires and asphalt road, understand the actual texture of actual contact are and influence of stress distribution, find the basic factors influencing against sliding, provide the new evaluation indicators of against sliding, then to evaluate the performance of against sliding in asphalt road.CAVF method is used to design the gradation of asphalt mixture, and then highlight the internal framework interlocked-denseness abilities, which achieve good structure and durability requested by against sliding. In order to simulate the actual driving status really, there is a small accelerated loading knead machine developed, to simulate indoor for against sliding performance’s attenuation variation of asphalt mixture. Then create the evaluation methods of asphalt mixture’s sliding performance based on the knead testing, recommend indoor kneading testing research of selecting strip tires, provide attenuation rate of against sliding regarding as evaluation indicators for early pavement anti-sliding performance research.The laser detectors are developed independently by this topic group and used to measure rut board trail-run components. The results indicate that there is a significant relation between maximum rate of angular distribution, MTD and BPN, which can be as evaluation indicators for asphalt road against sliding performance. Meanwhile, attenuation rate of peak angle is provided as evaluation indicators for durability against sliding, which also evaluate the characteristics of anti-sliding performance attenuation in asphalt road. Asphalt mixture is under the conditions of the 60 ℃ standard temperature and 8hours knead time, the distribution probability for maximum rate of angular distribution is less than 70%, anti-sliding performance of asphalt road meet the requirements.Using measuring techniques of pressure film is to select two kinds of different size ranges’ pressure films, as for different types of rut boards after knead testing through 0,2,4,6,8 hours, these rut boards are tested for static load pressure film. Try to use new anti-sliding evaluation indicators provided based on measuring techniques of pressure film. Using 0.2~0.6MPa films and 0.5~2.5films to research differently in the contact areas and stress concentration effects between rut boards after different knead times and tire static state, and create a 3D effect graphs of stress concentration again. The testing research indicates that the anti-sliding performance and durability of GAC-13 Road are better than AC-13. Through the deep analysis of data and images, provide the contact areas and stress concentration distribution rate these two evaluation indicators, and also there is a significant relation between these two indicators and MTD & BPN. Therefore, that can regard as evaluation indicators anti-sliding performance in asphalt road. These two indicators have sufficient accuracy and reliability when evaluate the anti-sliding performance in asphalt road.