| With the development of western transportation, the large-scale construction of highway will be carried through in desert region. Therefore it is necessary to study the construction technical of asphalt pavement in desert. Aimed at the unique clime in the desert area such as centralized rain, big difference of temperature, strong sunlight, this paper studies how to solve the durability damage of asphalt pavement in the desert express highway.Based on the perdurable performance of the asphalt pavement are influenced by water, heating, ultraviolet radiation, this paper studies the water stability, heating ageing and ultraviolet radiation ageing of bituminous mixtures. Through the research on the change of marshall stability and freeze-thaw cleavage strength, the law of bituminous mixtures moisture susceptibility is educed. In different heating ageing temperature and time, the road performance of bituminous mixtures such as high temperature stability, cracking resistance at low temperature, fatigue resistance is studied. By the specialties apparatus and new experimentation on ultraviolet radiation ageing, the characteristics of asphalt and bituminous mixtures are influenced by ultraviolet radiation. Through Infrared Adsorption Spectrum Analysis (IR), Differential Scanning Calorimetry (DSC), the influence of ultraviolet radiation ageing on the composition of bitumen is studied. In ultraviolet radiation ageing, the low temperature crack resistance, fatigue resistance of bituminous mixtures are studied. |
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