OPTIMIZATION DESIGN RESEARCH OF ATB-25 IN OVERHAUL PROJECT OF ROAD IN COLD AREAS
The problems of segregation and serious water seepage of ATB-25 asphalt pavement in cold areas should be solved to improve the durability of asphalt pavement in cold areas. A method is proposed associating with reason-ably reducing the proportion of coarse aggregate and increasing the proportion of fine aggregate to fill the gap of the road, effectively reducing the degree of segregation of asphalt mixture gradation. In the paving process, the use of re-ducing the height of the screw fabricator, extending the length of the stirrer at both ends of the screw fabricator, and adding reverse blades are suggested to improve the mix uniformity of asphalt mixture. A rubber wheel roller is em-ployed to redistribute the coarse and fine aggregates in the initial compaction procedure.The results indicate that ad-justing the gradation of asphalt mixture by balancing its high-temperature performance and water tightness, and im-proving it from the aspects of paving and rolling construction, can effectively improve the water tightness of ATB-25 asphalt pavement while ensuring the high-temperature performance of ATB-25 mixture, providing the reference for the construction optimization of ATB-25 asphalt pavement in cold regions.
cold regionATB-25 (Asphalt-treated base asphalt mixture)segregationscrew distributorrubber-wheeled rollers