寒区热再生沥青混合料的耐候性能研究

Research on Weather Resistance of Hot Recycled Asphalt Mixture in Cold Area

摘要: 呼伦贝尔等寒冷地区对热再生沥青混合料的性能更需关注低温抗裂、水稳定性、抗冻性以及老化后混合料性能的改变。为探究课题组研制的再生剂对寒冷地区热再生沥青混合料的改善效果，本文对再生沥青混合料的低温性能、水稳定性能、老化性能等与温度、水、老化相关的耐候性指标进行了研究。结果表明：采用研制的寒区再生剂的热再生沥青混合料对于寒冷地区有着良好的适应性；在再生剂掺量达到9%时，再生混合料的性能已经超过了新拌沥青混合料的性能。论文根据试验结果推荐出了寒冷地区再生沥青混合的配合比方案为RAP掺量30%，再生剂掺量为9%。

Abstract: In cold areas such as Inner Mongolia, more attention should be paid to the performance of hot recycled asphalt mixtures at low temperature anti-cRA-Cking, water stability, freezing resistance, and changes in the performance of aging mixture. In order to explore the improvement effect of the regenerating agent developed by the research group on the hot recycled asphalt mixture in cold areas, this paper studies the low-temperature performance, water stability performance, aging performance and other weather resistance indicators related to temperature, water and aging of the regenerated asphalt mixture. The results show that the hot regenerated asphalt mixture using the developed regenerant has good adaptability to cold areas; when the regenerant dose reaches 9%, the performance of the regenerated mixture even exceeds the performance of the new asphalt mixture. Based on the test results, the thesis recommends that the dose of recycled asphalt mixture in cold areas is 30% RAP and 9% regenerant.