摘要
目前沥青混合料回收料(reclaimed asphalt pavement,RAP)已在众多道路工程得到了应用,但基于安全性和使用寿命考虑,对于高掺量RAP热拌/温拌再生沥青混合料在交通荷载下的路用性能仍有待深入研究。为研究高掺量RAP热拌/温拌再生沥青混合料在交通荷载下的路用性能,采用室内试验同时结合了数学分析的方法,分析废食用油(waste cooking oil,WCO)含量、RAP掺量以及拌合方式等再生沥青混合料设计参数对再生沥青混合料路用性能影响规律。研究结果表明:在多数情况下R-100RAP混合料的矿料间隙率(VMA)大于14%且空隙率(VV)大于3%,60%RAP含量的沥青混合料在添加10%WCO和1.0%沥青时,VV和VMA均处于规定范围内。R-100RAP、R-80RAP、W-80RAP和R-60RAP混合料的绝大部分劈裂强度比大于80%,展现其良好的抗水损能力,WCO的加入有利于提升再生沥青混合料的抗水损能力。W-80RAP再生沥青混合料的抗车辙性能低于含有R-80RAP和R-60RAP再生沥青混合料,但三者均展现出了良好的抗车辙性。对比W-80RAP与R-60RAP的性能,W-80RAP拥有更小的相位角和更大的刚度值,且抗老化能力更好。研究结果为高掺量RAP热拌/温拌再生沥青混合料的性能优化及高效施工提供了理论依据。
Reclaimed asphalt pavement(RAP)has been utilized in numerous road projects.However,considering safety and service life,further in-depth investigation is required into the road performance of high dosage RAP hot-mix/warm-mix recycled asphalt mixtures under traffic loads.To investigate this,indoor tests and mathematical analysis were employed to examine the impact of design parameters,including the waste cooking oil(WCO)content,RAP dosage,and mixing method,on the road performance of recycled asphalt mixtures.The results indicate that in most cases,the VMA of R-100RAP mixes exceeds 14%,and the VV exceeds 3%.Moreover,both the VV and VMA of asphalt mixtures with 60%RAP content,10%WCO,and 1.0%asphalt fall within specified ranges.Additionally,the split strength ratios of the majority of R-100RAP,R-80RAP,W-80RAP,and R-60RAP mixes surpass 80%,indicating excellent resistance to water damage.The addition of WCO proves beneficial in enhancing the water damage resistance of recycled asphalt mixtures.Although the rutting resistance of the W-80RAP asphalt mixture was inferior to that of the recycled asphalt mixtures containing R-80RAP and R-60RAP,all three exhibited commendable rutting resistance.When comparing the performance of W-80RAP and R-60RAP,it is observed that W-80RAP exhibits a smaller phase angle and a larger stiffness value,indicating better aging resistance.In order to maximise performance and facilitate the effective building of high dosage RAP hot-mix/warm-mix recycled asphalt mixes,the research provides a theoretical framework.
作者
刘成
刘一鸣
叶群水
胡涛
LIU Cheng;LIU Yi-ming;YE Qun-shui;HU Tao(Hope College,Southwest Jiaotong University,Chengdu 610400,China;China Construction Fifth Bureau Ecological Environment Engineering Co.,Ltd.,Changsha 410004,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《科学技术与工程》
北大核心
2025年第9期3828-3839,共12页
Science Technology and Engineering
基金
国家自然科学基金青年科学基金(52209154)。
