高沥青质塔河原油制备道路沥青的工艺及性能评价

提出了以高沥青质的塔河原油生产重交通道路沥青和聚合物改性道路沥青的制备工艺,并对产品进行了路用性能评价。采用增延剂和其他添加剂可以制备性能优良的重交沥青;利用交联稳定剂可以制备相容性好的聚合物改性道路沥青。路用性能评价采用传统方法和美国战略公路研究计划(SHRP)方法进行。结果表明:塔河沥青具有软化点和针入度指数高的特点;SHRP方法评价表明,尽管塔河沥青老化前后的低温延度低,但是在具有较高的抗高温变形能力前提下,能够保持优良的低温抗裂性。与其他原油制备的改性沥青相比,高沥青质塔河原油制备的苯乙烯-丁二烯-苯乙烯共聚物(SBS)和丁苯橡胶(SBR)改性沥青,具有独特的高、低温性能和更低的感温性。

Processing and Performance Evaluation of Paving Asphalt from High Asphaltene Tahe Crude Oil

The process for producing heavy traffic paving asphalt and polymer modified paving asphalt(PMA) from Tahe crude oil with high asphaltene content was presented,and the paving performance evaluation of these asphalts was also studied.The heavy traffic paving asphalts were(produced) by adding ductility improver and other additives;in addition,the PMAs were produced using stabilizer.The evaluation experiments were conducted by conventional and SHRP methods respectively.Comprising to other paving asphalts,the asphalts derived from Tahe crude oil have higher softening point and penetration index(PI).The evaluation results from SHRP method indicate that the Tahe asphalt is possessed of greater resistance to permanent deformation at high temperature and good low temperature performance despite of its low ductility.The SBS and SBR modified asphalt from Tahe crude oil are also possessed of excellent high and low temperature performance as well as lower temperature susceptibility compared with those from other crude oils.