彩色沥青的路用性能

以辽河沥青(AH-70)为基质沥青,在一定的工艺条件下,加入各种添加剂,调和剂和颜料,采用调和法制备出了符合GB/T15180-94的4种牌号重交通道路标准的彩色道路沥青。对其中的70#、90#两个牌号的彩色沥青路用性能进行了分析,并用粘度法对其抗老化性能进行了评价。路用性能分析的结果表明,所研制的两种彩色道路沥青针入度指数PI在-1.2～+1.0之间,具备良好的感温性能;当量软化点T800,当量脆点T1.2和粘弹区间(T800-T1.2)均相近或优于相应的沥青标准,具有良好的高温稳定性和低温开裂性;70#彩色沥青老化指数低于90#彩色沥青,抗老化性较好。

Performance of Colored Paving Asphalts

Under certain process conditions, four brands colored paving asphalt conforming to GB/T15180-94 standard were prepared by blending Liaohe asphalt and a variety of additives, blender and pigment. The road performance of 70~# and 90~# colour paving asphalt was evaluated and their aging resistance was studied by viscosity method. The results show that these two brands colored asphalts whose penetration index ranged from -1.2 to +1.0 have the characteristics of good temperature susceptibility, their equivalent softening point (T_(800)), equivalent brittle point(T_(12)) and viscoelastic space(T_(800)-T_(12)) are similar or better than those of the corresponding standard of asphalt, they exhibit high temperature stability, good low-temperature cracking resistance, and the 70~# colored paving asphalt with lower aging index than 90~# has better aging resistance.