Asphalt-rubber pavements often become damaged in high-temperature regions and appear rutted or wavy,and experience slippage.To improve the high-temperature performance of the asphalt-rubber mixture,technical measurements,such as,the optimal adjustment of gradation,technique of composite modification,and control of compaction were investigated.An optimal adjustment of aggregate gradation based on stone matrix asphalt improves the high-temperature stability of the asphaltrubber mixture significantly.Through composite modification,the effect of asphalt-rubber modification was enhanced,and the dynamic stability and relative deformation indices of the asphalt-rubber mixture were improved significantly.Furthermore,compaction parameters had a significant influence on the high-temperature stability of the asphalt-rubber mixture.The rolling times for compacting the asphalt-rubber mixture should be controlled to within 18-20 round-trips at a molding temperature at 180°C;if the rolling time is a 12 round-trip,the compaction temperature of the asphalt-rubber mixture should be controlled between 180 and 190°C.
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