摘要
温再生技术是一种有效的利用沥青混合料回收料(RAP)实现再生的新技术。为改善温再生沥青路面性能,有效提高RAP的循环利用率,通过力学性能和路用性能分析考察了RAP掺量对温再生沥青混合料性能的影响规律,探讨动稳定度与重复加载蠕变试验力学参数的相关性。研究结果表明:随着RAP掺量的增加,温再生沥青混合料的高温稳定性、抗剪切和抗弹性变形能力提高,但低温抗裂性能、水稳定性能有所下降。此外,流动数与动稳定度之间具有较好的线性相关性,可以借助流动数评价混合料的高温抗车辙能力;相同RAP掺量下,改性温再生沥青混合料的各项性能均优于普通温再生沥青混合料,当RAP掺量达70%时,混合料各项性能仍能满足规范要求,可为后期工程应用和质量控制提供依据。
Warm recycling technology is an effective new technology for recycling recycled asphalt pavement(RAP).In order to improve the pavement performance of warm recycled asphalt and effectively enhance the recycling rate of RAP,the influence of RAP content on the performance of warm recycled asphalt mixture was investigated through mechanical properties and pavement performance analysis,and the correlation between dynamic stability and mechanical parameters of creep tests under repeated loading was discussed.The results show that with the increase in RAP content,the high-temperature stability,shear resistance,and elastic deformation resistance of warm recycled asphalt mixture are improved,but the low-temperature crack resistance and water stability are decreased.In addition,there is a good linear correlation between the flow number and the dynamic stability,and the flow number can be used to evaluate the high-temperature rut resistance of the mixture.Under the same RAP content,the performance of the modified warm recycled asphalt mixture is superior to that of the ordinary warm recycled asphalt mixture.When the RAP content reaches 70%,the performance of the mixture can still meet the specification requirements,which provides a basis for later engineering application and quality control.
作者
任瑞波
尹利洋
徐强
赵品晖
马世东
REN Ruibo;YIN Liyang;XU Qiang;ZHAO Pinhui;MA Shidong(School of Transportation Engineering,Shandong Jianzhu University,Jinan,Shandong 250101,China)
出处
《中外公路》
2024年第1期66-75,共10页
Journal of China & Foreign Highway
基金
国家自然科学基金资助项目(编号:51608511)
山东省自然科学基金资助项目(编号:ZR2021ME189)。
关键词
沥青混合料回收料
温再生技术
沥青混合料
力学性能
路用性能
recycled asphalt pavement
warm recycling technology
asphalt mixture
mechanical property
pavement performance