In order to improve the high RAP content and warm recycled asphalt mixture water stability,low temperature cracking resistance and fatigue resistance,calculated based on the asphalt surface energy and viscosity test work,to study the aging asphalt,warm mix agents,fiber,anti-stripping agent on asphalt-aggregate adhesion strength,and then use rutting were studied fiber and anti-stripping agent for thermal regeneration Mixture low temperature bending test,freeze-thaw cycle test and four-point loading fatigue testing impact and fatigue durability,and reveals the influence of the mechanism of fiber and anti-stripping agent for hot recycled mixtures of water stability and cracking resistance.The results show that the thermal regeneration and lead to lower water temperature regeneration mix stability because of lower energy after aging asphalt surface,adding warm mix asphalt agent reduces the surface energy reduces the asphalt-aggregate interface bond strength;doped plus anti-stripping agent,fiber and fiber agent anti-stripping agent compound modifier can significantly improve the asphalt surface energy,increasing the work of adhesion between the asphalt and aggregates,to improve the adhesion between asphalt and aggregate;anti stripping agent and fiber compound can significantly improve the heat (warm) Recycled asphalt Mixture low temperature performance,fiber and anti-stripping agent not only significantly improves the thermal (warm) recycled mixture splitting strength and water stability,but also delayed the freeze thaw cycles under the action of heat (warm) recycled mixture splitting strength decay course;adding anti-stripping agent,fiber and fiber agent anti-stripping agent compound modifier could significantly improve the thermal (temperature) bending stiffness of renewable mix modulus and fatigue life,fiber and anti-stripping agent compound modified thermal regeneration of the road mixture performance were to meet regulatory requirements,and suggested as the preferred anti-stripping agent basalt complex programs to improve high RAP content heat (warm) recycled mixtures weatherability.%为了改善高RAP掺量热再生和温再生沥青混合料的水稳定性、低温抗裂性及抗疲劳耐久性,基于沥青表面能测试和黏附功计算,研究了老化沥青、温拌剂、纤维、抗剥落剂对沥青-集料黏结强度的影响,进而采用车辙试验、低温弯曲试验、冻融循环试验和四分点加载疲劳试验研究了纤维和抗剥落剂对热再生混合料路用性能和抗疲劳耐久性的影响,并揭示了纤维和抗剥落剂对热再生混合料水稳定性和低温抗裂性能的影响机理.研究结果表明,导致热再生和温拌再生水稳定性较低的原因是沥青老化后表面能的降低,掺加温拌剂降低了沥青的表面能,降低了沥青-集料界面的黏结强度;掺加抗剥落剂、纤维剂纤维与抗剥落剂复合改性剂可显著改善沥青表面能、增大沥青与集料之间的粘附功,提高沥青与集料之间的粘附性;将抗剥落剂与纤维复配可显著改善热(温)再生沥青混合料的低温性能,纤维与抗剥落剂不仅显著提高了热(温)再生混合料的劈裂强度和水稳定性,也延缓了冻融循环作用下热(温)再生混合料劈裂强度的衰变历程;掺加抗剥落剂、纤维剂纤维与抗剥落剂复合改性剂均可显著改善热(温)再生混合料的弯曲劲度模量和抗疲劳寿命,,纤维与抗剥落剂复合改性热再生混合料的各项路用性能均满足规范要求,建议优先采用玄武岩与抗剥落剂复配方案来改善高RAP掺量热(温)再生混合料的耐候性.
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