主要研究再生SBS改性沥青混合料的抗老化性能.对沥青进行24h、48h TFOT老化,分别模拟沥青的中度和重度老化,然后将老化沥青再生,对再生沥青拌制的混合料及新鲜沥青混合料进行室内短期与长期老化,并对老化后的沥青混合料进行性能试验与对比评价,分析了再生沥青混合料的抗老化性能及其老化规律.评价再生沥青混合料的耐久性.
TFOT aging has been conducted on SBS modified bitumen at different aging time. The aged binders are then recycled by blending with rejuvenating oil. Aging has been carried out again on both asphalt mixtures of fresh binder and recycled binders. The aging behavior for the two kinds of asphalt mixture has been compared according to performance test on the mixtures. As a result, the durability of recycled SBS asphalt mixture has been evaluated.