The Research On Asphalt Pavement Performance With An Anti-rutting Agent

Rutting is a unique damage phenomenon of asphalt pavement. It is a worldwide long-term puzzle for road workers both at home and abroad. According to statistics, more than 30 percent of the road damage associated with the rutting. The rutting problems are more prominent for the asphalt pavement on the zone with the heavy load and high temperature. Therefore, it is of very important theoretical significance and practical value to study the structure and material of asphalt pavement on the zone with the heavy load and high temperature.Based on the field survey of asphalt pavement with the feature of heavy load and high temperature, lots of laboratory tests and theoretical research, main achievements are concluded as follows:(1) Using DSR, IR, DSC and TG analysis means, the high-temperature properties and strengthen mechanism of asphalt mortar of AH-70 and modified asphalt PG76 with anti-rut agent are carried out preliminary study from the microscopic view. The optimal amount is proposed.(2) The high temperature properties of AC-20 about PG76, AH-70 and AH-70 with different amounts of anti-rut agent are systematically comparatively analyzed. The test results show that AC-20 with AH-70 incorporate anti-rut agent have a noticeably improvement in the aspect of high temperature performance. Using the orthogonal analysis method, the high temperature properties of AC-20 with anti-rut agent by the impact of the mixing temperature, rolling temperature, dry mixing time and wet mix time is analyzed and proposed appropriate technical parameters.(3) Combining with indoor tests and the results of the analysis about pavement structure, the reasonable pavement structure and materials composition of test road under the different conditions is designed and implemented. After more than one year tracking test the results shows that the test roads have an excellent service performances and the rutting is also in a good control. It indicates that the pavement structure and the materials design of the test roads are successful. Those valuable experiences are referred to similar highway asphalt pavement structure and materials design in the future.