摘要
【目标】为降低沥青路面胎-路滚动阻力造成的能源损耗,同时满足道路施工的性能要求,基于响应曲面法,将PE/PP弹性改性剂、SBS改性剂和橡胶油掺入基质沥青改性,制备了PPSE(Polyethylene Polypropylene SBS Elastic)改性沥青。【方法】通过高温凝胶渗透色谱仪试验、低温弯曲梁流变试验和动态剪切流变试验,评价PPSE改性沥青技术性能。通过车辙试验、低温小梁弯曲破坏试验、指针式摆式仪试验和动态模量试验,探究PPSE改性沥青混合料路用性能优势。采用压力测试胶片技术对轮胎与车辙板进行接触测试,并结合接触力学理论对滚动阻力评价。【结果】PPSE改性沥青技术性能优秀,能够作为结合料发挥优势;PPSE改性沥青混合料的高温稳定性、低温抗裂性表现突出,动态模量的性能优势促成了滚动阻力的降低,抗滑性能满足道路验收要求;PPSE改性沥青混合料路面与轮胎接触应力呈显著非均匀性分布,在相同的静态荷载下,PPSE改性沥青在温域时域范围内较高的剪切模量实现了混合料矿料颗粒间的更强黏聚力,形成了更加稳定的混合料骨架力链,使黏附力减少了21.12%,可明显降低滚动阻力(黏滞力)。【结论】PPSE改性沥青具有优良黏弹力学及黏聚特性,使其混合料变形协调均匀性提升,改善轮胎与路面接触应力分布,降低轮胎滚动阻力。
[Objective]The study investigated to reduce energy losses caused by tire-pavement rolling resistance on asphalt pavement while meeting the performance requirements for road construction.The response surface methodology was used to incorporate PE/PP elastic modifiers,SBS modifiers,and rubber oil into base asphalt to prepare PPSE(polyethylene polypropylene SBS elastic)modified asphalt.[Method]The technical performance of PPSE modified asphalt was evaluated through high-temperature gel permeation chromatography tests,low-temperature bending beam rheometer tests,and dynamic shear rheometer tests.The road performance advantages of PPSE modified asphalt mixtures were investigated through rutting tests,low-temperature beam bending failure tests,pendulum-type skid resistance tests,and dynamic modulus tests.The tire-pavement contact tests were carried out by using pressure-sensitive film technology.The rolling resistance was evaluated in conjunction with contact mechanics theory.[Result]PPSE modified asphalt exhibits excellent technical performance,effectively functioning as a binder.PPSE modified asphalt mixtures demonstrate outstanding high-temperature stability and low-temperature crack resistance;the dynamic modulus performance contributes to reducing rolling resistance;and the skid resistance meets the road acceptance requirements.The contact stress distribution between PPSE modified asphalt pavement and tire is significantly non-uniform.The high shear modulus of PPSE modified asphalt within temperature-time domain enables stronger cohesion among aggregate particles under the same static load.That will form more stable mixture skeleton force chain,reduce adhesion by 21.12%,and significantly lower the rolling resistance(viscous force).[Conclusion]PPSE modified asphalt has excellent viscoelastic mechanics and cohesive characteristics,which improves the deformation coordination uniformity of its mixture,modifies the tire-pavement contact stress distribution,and reduces the tire rolling resistance.
作者
肖庆一
闫鹏浩
王文斌
陈俊波
龚芳媛
XIAO Qingyi;YAN Penghao;WANG Wenbin;CHEN Junbo;GONG Fangyuan(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100080,China;North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300072,China)
出处
《公路交通科技》
北大核心
2025年第8期35-42,共8页
Journal of Highway and Transportation Research and Development
基金
天津市自然科学基金项目(20JCQNJC00930)。
