Abstract
Based on the temperature field data collected from a self-developed pavement system, asphalt pavement temperature field distribution law in seasonally frozen regions was studied in detail. Test data illustrated that: The atmospheric and pavement temperature shows cycle sine rule; Minimum and maximum values of pavement temperature occur at surface, In winter, pavement temperature gradually increases with increasing depth, but has contrary result in summer; As the increase of depth, the fluctuation range of pavement temperature decreases gradually, which lead to the appearance of daily and annual constant temperature point; The max freezing depth appeared at 120cm and there will be freezing core in spring in seasonally frozen regions.
Highlights
Road structure is exposed to the natural environment, in addition to bear the vehicle load, and affected by environmental factors such as temperature, radiation, wind, rain, snow and so on[1,2]
53.5% of the area in china belongs to seasonal frozen region, where torridity summer, frigid winter, great annual temperature difference are obvious features
It is necessary to develop the study on temperature distribution characteristic of asphalt pavement in seasonally frozen regions
Summary
Road structure is exposed to the natural environment, in addition to bear the vehicle load, and affected by environmental factors such as temperature, radiation, wind, rain, snow and so on[1,2]. The pavement structure must meet the load requirements, and to adapt to their environment. Temperature has the greatest impact on the road structure [5]. 53.5% of the area in china belongs to seasonal frozen region, where torridity summer, frigid winter, great annual temperature difference are obvious features. Bearing capacity and service performance of pavement are sensitive to the change of temperature [6]. It is necessary to develop the study on temperature distribution characteristic of asphalt pavement in seasonally frozen regions
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