Abstract
Asphalt pavement is widely used at home and abroad because of its advantages of comfortable driving, convenient maintenance, short construction period, etc. Asphalt becomes brittle and is cracked in winter. Gannan is located in the plateau, belonging to plateau climate, low year-round temperature, often wind and rain, day and night temperature difference, strong sunlight. Therefore, the asphalt was selected with high temperature stability and low temperature ductility. The KLMY90# asphalt and its mixture were studied for the technical properties. The results showed: the content of saturates and aromatic components reduced at aging temperature; the saturated and aromatic content decreased at aging time; the saturated content decreased slowly than the content of aromatic content as the aging time decreasing; the dynamic stability increased with the asphalt-aggregate ratio; the asphalt mixture had superior performance, strong water resistance. The KLMY90# asphalt and its mixture were more suitable for paving roads for Gannan.
Highlights
Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metal derivatives; it is soluble in carbon disulfide[1]
The chemical composition of KLMY90# asphalt was studied by changing rule of the four components of aged asphalt, which was tested by the method [9]
The saturated content and aromatic content decreased with the increase of aging time; the content of saturated content decreased more slowly than the content of aromatic content as the aging time decreasing; the saturated components of asphalt and the content of aromatic components were oxidized in the aging process of asphalt; and the effects of ultraviolet rays were converted into asphaltenes and colloids, thereby reducing the performance of asphalt
Summary
Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metal derivatives; it is soluble in carbon disulfide[1]. Asphalt pavement has many advantages such as comfortable driving, convenient maintenance, short construction period, easy maintenance, and no reflective driving at night [2,3,4,5,6]. There are many factors that affect the road performance of asphalt and asphalt mixtures, such as the nature of raw materials, climatic conditions, and composition of grading [2,3]. There is a great difference in the climate everywhere, and the asphalt is easy to crack. The KLMY90# matrix asphalt and its mixture were studied to be suitable for the climate in Gannan region, and the reference basis put forward for the construction of asphalt pavement in this area
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