论文部分内容阅读
介绍了温拌再生混合料AC13的设计步骤和设计方法,以Evotherm温拌剂和自制的界面分散剂为添加剂,采用水煮法和冻融劈裂试验方法系统研究了界面分散剂用量对温拌再生混合料水稳性和黏附性的影响,分析了界面作用下RAP中旧沥青膜与旧集料的形态变化,并确定了其合理用量。结果表明,随着界面分散剂用量增大,温拌再生混合料冻融前后的劈裂强度和TSR值发生了较显著变化;当界面分散剂用量为RAP的0.2%时,温拌再生混合料的TSR值和冻融前后的劈裂强度均较高,表明此时温拌再生沥青混合料具有优异的水稳性,过量的界面分散剂对温拌再生混合料的水稳性有一定负面影响;旧集料通过界面作用,实现了与旧沥青膜的剥离并与新沥青胶结料的二次裹覆。
The design procedure and design method of warm-mix recycled mixture AC13 were introduced. Evotherm warm-mix agent and self-made interfacial dispersant were used as additive to study the effect of interfacial dispersant dosage on warm mix The influence of the water stability and the adhesion of the recycled mixture, the morphological changes of the old asphalt film and the old aggregate in the RAP under the action of the interface were analyzed, and the rational dosage was determined. The results showed that the splitting strength and TSR of the warm mix recycled mixture changed significantly with the increase of the amount of dispersant. When the interface dispersant dosage was 0.2% of RAP, TSR value and the splitting strength before and after freezing and thawing are higher, indicating that this warm mix asphalt recycling has excellent water stability, excessive interfacial dispersant on the warm mix of water with a certain negative impact on the stability of the mixture ; The old aggregate through the interface effect, with the old asphalt film stripping and the new asphalt binder with the second wrap.