Study On Hot Mix Asphalt Mixture's Design Based On Western Characteristics

With the warming of global temperature, increasing of traffic, heavy of traffic loads, the premature damage of asphalt pavement is serious, because of structure design, material design and construction matters. There are many differences of climate, traffic, materials between eastern areas and western area. It has very important meanings to study the asphalt mixtures' design based on the western area.The main study content and methods are listed as follows: 1. According to the climate resources of western areas, the temperature field cluster compartment is decided. 2. The reasonable asphalt types and classes are chosen in accordance with the former temperature field. 3. With my own created test equipments and methods, the asphalt mortar's performance and law are studied, from the point of modern mortar theory. 4. Through single factor skeleton dense test, the optimal framework structure of gabbro AC-16 gradation is got. The reasonable gradation's trend is got by means of performance comparison between t restricted zone gradations. 5. The optimal shaping method is recommended according to pavement performance of different shaping methods. 6. The scopes of filler asphalt ratio with dense gradation asphalt mixture, polyester fiber asphalt mixture, stone matrix asphalt mixture(SMA) are got through the pavement performance study of different filler asphalt ratio's.Based on systematic research, this paper draws the following conclusions: 1. Western areas' high pavement design temperature and the low pavement design temperature is determined, which modify the specification's defect. 2. Aiming at SHRP's defects of not differentiating asphalt performance in western areas, critical temperature of equal target value is the criteria to evaluate performance of the same PG class. 3. According to asphalt pavement temperature field and Penetration-Performance Grade-PPG system, reasonable asphalt types and classes are chosen. 4. The asphalt mortar's performance is evaluated with my own created test equipments and methods, cone penetration test in high temperature and bending test in low temperature. 5. The reasonable asphalt mixture's gradation scope and trend are recommended. 6. In adaptation to western areas' climate, traffic conditions, the proper design method is recommended to do asphalt mixtures' design. 7. The filler asphalt ratio of dense gradation asphalt mixture, polyester fiber asphalt mixture and stone matrix asphalt mixture(SMA) is recommended.