Experimental Study On Asphalt Mixture Of Freeway Pavement At Seasonally Frozen Region

The Northeast China is located in the temperate monsoon climate zone, the longcold winter, cool in summer there is no lack of hot weather, called the seasonal frozenregion. To coordinate with the economic development in the region, the Northeasthighway mileage has increased year by year. With the increasing speed mileage,pavement gradually revealed. Use performance of asphalt mixture structure directlyrelated highway asphalt mixture pavement. The survey found that, cause of disease ofasphalt pavement and the mixture ratio of most of the. Therefore, research on asphaltmixture is helpful to reduce the pavement of expressway, increase its performance.Study on the proportion of existing studies focus on the adaptation to the majority ofarea of asphalt mixture pavement, and according to the special climate conditions ofthe asphalt mixture research less, so this research especially in seasonal frost areahighway asphalt mixture is studied.To long highway as the representative, summed up the season main diseasesfrozen region types of highway cracks, loose, pit slot. Change trend with mileagedamage statistics of various diseases and General Chang Ping freeway pavement, tograsp the occurrence characteristics of various diseases, and analyze the cause ofvarious diseases.According to the cause of seasonal frozen region highway diseases, design ofseasonal frozen region highway structure should be divided into the surface layer,middle and lower three layers, and each layer should characteristic of asphalt mixturehas the functions and suitable with the. And the design of asphalt mixture ratio test,including aggregate gradation, asphalt content and other major experiments ofMarshall.Of asphalt mixture test surface layer, middle and lower. From the asphalt mixturematerial, in order to aggregate screening, grading, different asphalt aggregate ratiopacket specimen, determine the optimal asphalt aggregate ratio range recommendedby Marshall test, and finally determine the asphalt mixture recommendation results.