摘要
【目的】分析老化和路面铣刨料(Reclaimed Asphalt Pavement,RAP)掺量对沥青再生剂有效性的影响。【方法】选择环烷油、芳烃提取物、石蜡油、妥尔油和油酸等5种再生剂,制备RAP掺量分别为25%和45%的多种沥青混合料,对不同沥青混合料分别老化2 h和6 h后提取沥青,通过动态剪切流变和弯曲梁流变试验测试不同沥青的高低温性能。【结果】结果表明:含不同再生剂的再生沥青与对照沥青相比,高温和低温失效温度差值均小于6℃,高低和温性能分级一致。含石蜡油的再生沥青性能分级优于含其他再生剂的再生沥青性能分级,石蜡油对沥青再生效果较好。再生沥青在不同频率下剪切模量值均低于对照沥青,含再生剂的混合料抗疲劳开裂性能增加。【结论】RAP掺量和老化对沥青再生剂有效性影响不显著。
[Purposes]This paper aims to analyze the effects of aging and reclaimed asphalt pavement(RAP)content on the effectiveness of asphalt rejuvenators.[Methods]Five rejuvenators,namely naph-thenic oil,aromatic hydrocarbon extract,paraffin oil,tall oil,and oleic acid,were selected to prepare various asphalt mixtures with RAP content of 25%and 45%,respectively.Asphalt was extracted from different asphalt mixtures after aging for 2 and 6 hours,respectively.The high and low temperature per-formance of different asphalt was tested by dynamic shear rheology and bending beam rheology tests.[Findings]The results show that compared with the control asphalt,the difference in high and low tem-perature failure temperatures between the regenerated asphalt containing different rejuvenators was less than 6℃,and the performance grading of high and low temperatures was consistent.The performance grading of regenerated asphalt containing paraffin oil is superior to that of regenerated asphalt containing other rejuvenators,and paraffin oil has a better effect on asphalt regeneration.The shear modulus values of regenerated asphalt are lower than those of control asphalt at different frequencies,and the anti fatigue cracking performance of the mixture containing rejuvenators is increased.[Conclusions]RAP content and aging have no significant effect on the effectiveness of asphalt rejuvenators.
作者
靳军
JIN Jun(Luohe Highway Engineering Construction Corporation,Luohe 462000,China)
出处
《河南科技》
2024年第20期87-90,共4页
Henan Science and Technology
关键词
道路材料
老化
RAP掺量
沥青
再生剂
有效性
road materials
aging
RAP content
asphalt
rejuvenator
effectiveness
作者简介
靳军(1991-),男,本科,工程师,研究方向:道路材料与路基路面工程。
