粉状橡胶修改沥青结合料在长期老化中的留变

资料简介：

　　Rheological Changes in Crumb Rubber-Modified Asphalts with Long-Term Aging
　　ABSTRACT，SHRP asphalts AAD-1 and ABD were mixed with crumb rubber and their rheological properties werestudied as a function of long-term oxidative aging. Master curves were constructed by shifting the agingtime-frequency data to assist in the interpretation. The results show that the stiffness effect of crumbrubber to asphalt AAD-1 is higher than to asphalt ABD. Addition of crumb rubber to both asphalts AAD-1 and ABD reduced viscosity buildup with aging. In addition, rubber modification dramatically increasedthe elasticity of both asphalts. It is possible that rubber modification will improve rutting resistancebecause of the increased viscosity and elasticity at high temperatures and improve thermal cracking andfatigue resistance by either decreasing viscosity or lowering viscosity buildup with aging at lowtemperatures.
$ I- T* w$ U. ~+ @& Y2 k0 j; @8 k　　粉状橡胶修改沥青结合料在长期老化中的留变
9 m' P' A: z/ G/ }' Y5 v　　摘要，SHRP沥青AAD-1和ABD的老化与长期的氧化有关，与粉状橡胶和他们的物理特性相互关联。 掌握曲线移动的时间频率数据对老化的解释过程有帮助。 结果显示粉状沥青的僵硬作用对沥青AAD-1的影响比在沥青ABD 高。 对于两沥青AAD-1和ABD，粉状橡胶的增加将使两重沥青降低黏度而老化。 另外，橡胶修改大量增加了两沥青的弹性。它可能是橡胶修改将改变抵抗，由于增加的黏度和弹性在高温下具有越来越少的黏度改进加热分裂和疲劳抵抗或降低黏度积累，在低温下老化。