中文摘要：

分别从微观和宏观对脱硫橡胶及其橡胶沥青进行了研究，并用普通废胎橡胶及其橡胶沥青进行了对比。通过溶解试验发现脱硫橡胶的溶解性远大于普通橡胶，回收脱硫橡胶中仅有极少的橡胶颗粒存在。红外光谱表明脱硫橡胶颗粒较普通废胶粉含有更多的活性化学键，具有较低的交联度。脱硫橡胶沥青在相同温度下粘度较低同时也兼具较好的稳定性。建立了脱硫橡胶沥青的溶胀模型。比较了2种橡胶沥青的路用性能，发现脱硫橡胶的粘度和低温延度要好于普通橡胶沥青，其他性能则略差，并用溶胀模型进行了解释。

英文摘要：

The desulfurized rubber and its rubber asphalt were studied from macro and micro aspects respectively, and the performance comparison between crumb rubber asphalt and desulfurized rubber asphalt was conducted. The result of solubility test show that the solubility of desulfurized rubber is much better than that of crumb rubber, and few rubber particle existed in the recycled desulfurized rubber. The infrared spectra show that the desulfurized rubber particle contains more additives and active chemical bond compared to crumb rubber powder, and the former has less cross-linking, resulting in lower viscosity and better stability at the same temperature. A swelling model for desulfurized rubber asphalt was established, and the pavement performance of two kinds of rubber asphalt was compared. It is found that the viscosity and low-temperature ductility of desulfurized rubber is better than those of ordinary rubber asphalt except other pavement performance, which was explained by the swelling model.