Abstract: Dongming 70# asphalt was selected as matrix asphalt (MA), and the desulfurized rubber asphalt (DRA) and rubber asphalt (RA) were prepared by mixing 22% ordinary rubber powder or deep desulfurized rubber powder respectively. And three asphalt mortars corresponding to MA, DRA and RA were prepared. Properties of DRA, RA were tested and compared, such as the infrared spectrum, viscosity-temperature curve, harmful gas emission, adhesion, storage stability, aging performance, high temperature performance etc.. The test results show that: compared with RA, there is no new chemical bonds in DRA, which shows that DRA and RA contain similar chemical functional groups. The mixing and compaction temperature of DRA are 166.20～175.40 ℃, 151.30～157.98 ℃ respectively, and those of RA are 195.62～205.26 ℃, 179.53～187.19 ℃respectively, which indicates that RA has better high temperature performance. The harmful gas emission of DRA is about 1/2 of that of RA, indicating that DRA is relatively environmentally friendly. DRA is superior to RA in low-temperature cohesion, mechanical stirring storage stability and high-temperature rutting resistance after short-term aging. However, the aging resistance, high-temperature rutting resistance of DRA are lower than those of RA. It is recommended that DRA can be used in areas where high-temperature performance requirements are relatively low, while RA should be restricted due to its poor environmental protection.

Key words: highway engineering, desulfurized rubber asphalt (DRA), rubber asphalt (RA), viscosity-temperature curve, low-temperature adhesion, aging performance

摘要： 选用东明70 # 沥青作为基质沥青（MA），分别掺入沥青质量22%的普通胶粉或深度脱硫胶粉，制备了脱硫橡胶沥青（DRA）和普通橡胶沥青（RA），并拌制了这3种沥青的沥青胶浆；对比分析了橡胶沥青RA和DRA的红外光谱、黏温曲线、有害气体排放量，以及黏附性、存储稳定性、耐老化性及高温性能等。结果表明：DRA相较于RA无新化学键产生，说明DRA与RA所含化学官能团相似；沥青的拌和温度及压实温度，DRA分别为166.20～175.40 ℃、151.30～157.98 ℃，RA分别为195.62～205.26 ℃、179.53～187.19 ℃，说明RA的高温性能更好；DRA的有害气体排放量约为RA的1/2，说明DRA相对较环保；DRA的低温黏结性、机械搅拌存储稳定性及短期老化后的高温抗车辙性能均优于RA，但抗老化性能及高温抗车辙性能不及RA。建议：DRA可用于对高温性能要求相对较低的地区，而RA由于其环保性较差则应限制使用。

关键词: 道路工程, 脱硫橡胶沥青, 普通橡胶沥青, 黏温曲线, 低温黏结性, 老化性能