油基温拌剂对SBS改性沥青老化动力学参数的影响研究

摘要

The softening points of two SBS modified asphaIts,generaI SBS asphaIt and SBS warm mix as-phaIt with LKWO-Ι oiI-based warm-mixed agent were tested. A first-order reaction kinetic modeI of aging was estabIished based on softening point data by caIcuIating the kinetic parameters. The resuIts showed that LKWO-Ι makes the activation energy of aging process sIightIy higher and pIays a roIe in a high tem-perature region in sIowing the reaction rate,asphaIt under the condition of warm mixing has a more obvi-ous decIine of softening point.%对掺入LKWO-Ι型油基温拌剂前后的SBS改性沥青的软化点进行测试，并建立起一级反应老化动力学模型。求得掺入温拌剂前后的SBS改性沥青的老化动力学参数。结果表明，LKWO-Ι型油基温拌剂对SBS沥青老化过程反应活化能略有升高，在高温区对反应速率有一定的减缓作用，掺入温拌剂的沥青软化点明显降低。