Study On The Design For Asphalt Mixture Paving On Bridge Deck With Longitsdinal Slope

The highway construction in cold mountainous region will inevitably induce longitudinal slopes phenomenon, Vehicle on longitudinal slopes accelerating and decreased velocity accelerate the horizontal load shearing stress and extends time of the stress on pavement. All of these factors which acting synthetically on the pavement test the high temperature stability, shearing resistance over the performance. On the other hand, Transportation is a difficult problem in cold region. Thus the bituminous concrete mixture paving on bridge deck with longitudinal slopes is studied for the high temperature stability, shearing resistance over the performance and anti-ice-snow in the paper. The main contents are introduced in the following paragraphs.The high-temperature stability index of the design, which researched from three aspects as follows: the temperature, load and track roller speed. Apply time-temperature equivalent theory fitting the law of the long-term development track. The results indicate converting the temperature, load and track roller speed to control the design of Rutting. Offering the converted track test temperature for stability index in longitudinal slopes.The study in shear stability of bituminous mixtures. To explore the law of shear from gradation, asphalt type and asphalt dose and the degree of compaction. The research also test the relevant between the shear strength and functional performance. The results indicated an appropriate gradation, the best asphalt dose as well as the sufficient degree of compaction can guarantee superior shear strength of bituminous mixtures. Shear strength test is demanded for high-temperature stability index.The anti-ice-snow of rubber powder asphalt pavement is studied in the paper. Through indoors tests for modulus of resilience mixing asphalt concrete at low temperatures, the results indicated that adding of the SMA rubber powder mixture the low-temperature modulus of resilience has improved. The applied conditions of the anti-ice-snow performance of the rubber powder asphalt pavement are confirmed.The design of mixture paving on bridge deck with longitudinal slope. Mainly through the design selection SMA16 and SMA13, including the design of gradation, asphalt dosage testing, pavement performance testing, high temperature stability, shear resistance testing in order to recommend the optimal mixture using in the project and provide a reference.