Abstract
Differences in climatic conditions have a significant impact on the bearing capacity and performance of asphalt pavements. The climatic conditions in Tibet are complex. Therefore, it is necessary to establish a climate division of asphalt pavement in Tibet. In this paper, the meteorological data of 28 meteorological stations in Tibet from 1991 to 2000 were used to analyze the main climatic factors affecting the performance of highway asphalt pavement by cluster analysis. The results are as follows: 1) The main climatic factors affecting the performance of highway asphalt pavement in Tibet include: solar radiation, maximum temperature, minimum temperature and large temperature difference. 2) The climate zoning indicators are the average daily solar radiation daily maximum temperature, the average annual extreme maximum temperature, the annual extreme temperature, and the average annual maximum temperature for seven consecutive days. 3) Tibet can be divided into five climate zones of I-V. In summary, the geographical boundaries and indicator distribution ranges of each sub-district can provide reference for the construction of highway asphalt pavement in Tibet.
Highlights
IntroductionThe difference in climatic conditions has a significant impact on the bearing capacity and performance of asphalt pavement
There are the following problems when using the asphalt climate zone of China to partition the Tibet Autonomous Region: 1) The same zoning indicators are used in Tibet and other parts of China, which cannot fully reflect the impact of special climatic conditions in Tibet on asphalt performance
The step is to carry out research on the applicability of asphalt and asphalt mixture for each asphalt pavement climate zone in Tibet
Summary
The difference in climatic conditions has a significant impact on the bearing capacity and performance of asphalt pavement. The common rutting, cracking, aging and other diseases on asphalt pavement are closely related to climatic conditions. Li et al (2019) analyzed the relationships among different distress types from a statistical point of view, and found that 282 asphalt pavements with semi rigid base structures in 23 regions of China were surveyed to identify 12 distress types. Cheng et al (2018).
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