摘要
为充分利用沥青路面回收料,通过高温车辙、小梁弯曲、浸水马歇尔和冻融劈裂等试验方法,分析RAP掺量对厂拌热再生沥青混合料路用性能的影响;通过灰靶决策模型确定RAP掺量的最优配比方案。结果表明:随着RAP掺量增大,厂拌热再生沥青混合料的高温稳定性逐渐提高,水稳定性和低温抗裂性逐渐下降;并且在30%~40%的RAP掺量范围内高温稳定性、低温抗裂性和水稳定性的评价指标变化速度加快;再生剂改善了厂拌热再生沥青混合料低温抗裂和水稳定性能;基于灰靶决策模型,最终确定添加再生剂且RAP掺量为40%的沥青混合料为最佳方案。
To fully utilize recycled asphalt pavement materials,the influence of RAP content on the road performance of factory mixed hot recycled asphalt mixture was analyzed through high-temperature rutting,small beam bending,immersion Marshall test,and freeze-thaw splitting test methods;Determine the optimal ratio scheme for RAP dosage through the grey target decision model.The results showed that as the RAP content increased,the high-temperature stability of the factory mixed hot recycled asphalt mixture gradually improved,while the water stability and low-temperature crack resistance gradually decreased;And the evaluation indicators for high temperature stability,low temperature crack resistance,and water stability change faster within the RAP content range of 30%to 40%;The rejuvenator improves the low-temperature crack resistance and water stability of the factory mixed hot recycled asphalt mixture;Based on the grey target decision model,the asphalt mixture with 40%RAP content and the addition of rejuvenator was ultimately determined as the optimal solution.
作者
蔡燕霞
崔雨豪
赵云刚
杨杰
陈少鹏
CAI Yanxia;CUI Yuhao;ZHAO Yungang;YANG Jie;CHEN Shaopeng(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Zhonglu High Tech(Beijing)Highway Technology Co.,Ltd.,Beijing 100088,China;Research and Development Center for the Application of New Materials Technology in Highway Construction and Maintenance Transportation Industry,Beijing 100088,China;Highway Construction Management Center of Handan Transportation Bureau,Handan 056000,China)
出处
《粉煤灰综合利用》
2025年第2期131-137,143,共8页
Fly Ash Comprehensive Utilization
关键词
路面工程
厂拌热再生
灰靶决策模型
RAP掺量
再生剂
路用性能
road surface engineering
hot mix regeneration
grey target decision model
RAP content
regenerant
road performance
