Abstract：To investigate the creep behavior of recycled asphalt pavement (RAP)as backfill material at different construction temperatures,with considerations of viscosity and temperature sensitivity of asphalt, the direct shear and direct shear creep tests on RAP specimens were conducted at 0℃ and 50℃.The direct shear test results show that at given compaction temperature, the shear strength is increased with increasing of vertical stress, and the shear strain corresponding to the maximum shear stress is increasesd.The shear strength is increased with the increasing of compaction temperature. The direct shear creep tests results show that at given shear stress ratio, the time to creep rupture is increased with the increasing of compaction temperature. Under the same compaction temperature, the time to creep rupture is increased with the increasing of vertical stress. The critical shear stress ratio is increased linearly with the increasing of compaction temperature. The modified creep model is proposed with considering the effect of compaction temperature by revealing the quantitative variation law for each parameter of the empirical three-parameter creep model. The construction of RAP as backfills is recommended in the summer to achieve high compaction temperature and increase the critical stress ratio for improving creep resistance.
殷杰， 王星光， 胡明明， 汤勇. 考虑击实温度的可回收沥青路面材料直剪蠕变试验[J]. 江苏大学学报（自然科学版）, 2020, 41(4): 478-483.
YIN Jie, WANG Xingguang, HU Mingming, TANG Yong. Direct shear creep tests on recycled asphalt pavement material with consideration of compaction temperature effect[J]. Journal of Jiangsu University(Natural Science Eidtion)
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2020, Vol. 41 
