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针对橡胶沥青易离析、高粘度等缺点,研究采用脱硫橡胶粉制备脱硫橡胶沥青,利用脱硫橡胶沥青溶胀模型,分析其改性机理,并对制备工艺展开研究,同时与普通橡胶沥青进行对照试验,研究脱硫橡胶沥青的性能。研究结果表明,脱硫橡胶粉比普通橡胶粉更易溶胀于沥青中,且伴有大量的化学结合,形成的脱硫橡胶沥青稳定性高;脱硫橡胶粉的最佳掺量为30%,加工工艺为剪切速率5 000r/min、剪切温度170～180℃、剪切时间60min,发育时间45min;脱硫橡胶沥青较普通橡胶沥青的各项路用性能均有所改善,特别是175℃旋转黏度仅为普通橡胶沥青的1/4～1/3,48h软化点差约为普通橡胶沥青的1/2。
Aiming at the defects of easy segregation and high viscosity of rubber asphalt, desulfurized rubber asphalt was prepared by using desulfurized rubber powder. The desulfurized rubber asphalt swelling model was used to analyze its modification mechanism. The preparation technology was also studied. At the same time, Research on the performance of desulfurized rubber asphalt. The results show that the desulfurized rubber powder is easier to swell than the common rubber powder in the asphalt, and accompanied by a large amount of chemical combination, the desulfurized rubber asphalt is formed with high stability. The optimal dosage of the desulfurized rubber powder is 30% and the processing technology is shear The shear rate of 5 000r / min, the shear temperature of 170 ~ 180 ℃, the shear time of 60min, the development time of 45min; desulfurized rubber asphalt road performance than the average rubber asphalt improved, especially 175 ℃ rotational viscosity of only Ordinary rubber asphalt 1/4 ~ 1 / 3,48 h softening point difference of about 1/2 of ordinary rubber asphalt.