G30连霍高速(新疆段)改扩建工程RAP性能分析及其对再生沥青性能影响  

Performance Analysis of RAP from G30 Lian-Huo Expressway(Xinjiang Section)Reconstruction and Expansion Project and Its Impact on the Performance of Recycled Asphalt

作　　者：王乐 郭恩成 关志凯 宋亮 高冲[5] 李梓豪 WANG Le;GUO Encheng;GUAN Zhikai;SONG Liang;GAO Chong;LI Zihao(Xinjiang Transportation Investment Group Co.,Ltd.,Urumqi Xinjiang 830000,China;Xinjiang Transportation Investment Construction Management Co.,Ltd.,Urumqi Xinjiang 830063,China;Key Laboratory of Highway Engineering Technology in Arid Desert Regions,Ministry of Transport,Urumqi Xinjiang 830017,China;School of Transportation Engineering,Xinjiang University,Urumqi Xinjiang 830017,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang Jiangxi 330013,China;School of Transportation and Logistics Engineering,Xinjiang Agricultural University,Urumqi Xinjiang 830000,China)

机构地区：[1]新疆交通投资集团有限责任公司,新疆乌鲁木齐830000 [2]新疆交投建设管理有限责任公司,新疆乌鲁木齐830063 [3]干旱荒漠区公路工程技术交通运输行业重点实验室,新疆乌鲁木齐830017 [4]新疆大学交通运输工程学院,新疆乌鲁木齐830017 [5]华东交通大学土木建筑学院,江西南昌330013 [6]新疆农业大学交通与物流工程学院,新疆乌鲁木齐830000

出　　处：《交通节能与环保》2025年第2期11-16,共6页Transport Energy Conservation & Environmental Protection

基　　金：2024年度新疆维吾尔自治区交通运输行业科技项目(2024-ZD-002);天山英才科技创新领军人才项目(2022TSYCLJ0045)。

摘　　要：G30连霍高速(新疆段)改扩建工程在拆除原路面过程中,预计产生巨量废旧沥青混合料(Reclaimed Asphalt Pavement,RAP),该工程设计采用厂拌热再生沥青路面技术回收利用RAP。为明确原路面结构哪个层位更适合再生利用,对三种不同层位获取的RAP沥青及新旧调和沥青(30%老化沥青+70%新沥青)开展动态剪切流变仪试验、弯曲梁蠕变仪试验。结果表明:不同层位的RAP中含有不同老化程度的沥青,上面层RAP内沥青老化最为严重,下面层RAP内沥青与整体铣刨RAP内沥青老化程度相当,均小于上面层RAP沥青。通过新旧沥青的调和处理,可以有效地恢复老化沥青性能,满足工程建设地区的规范要求。During the reconstruction and expansion of the G30 Lianyungang–Khorgas Expressway(Xinjiang Section),a large amount of reclaimed asphalt pavement(RAP)is expected to be generated from the removal of the existing pavement.The project is designed to utilize plant-mix hot recycled asphalt(RHMA)technology to recycle and reuse the RAP.To determine which layer of the existing pavement structure is more suitable for recycling,dynamic shear rheometer(DSR)tests and bending beam rheometer(BBR)tests were conducted on RAP asphalt obtained from three different layers and on a blend of aged and new asphalt(30%aged asphalt+70%new asphalt).The results show that the RAP from different layers contains asphalt with varying degrees of aging.The asphalt in the surface layer RAP is the most severely aged,while the asphalt in the lower layer RAP and the overall milled RAP has a similar degree of aging,which is less than that of the surface layer RAP.By blending aged and new asphalt,the performance of the aged asphalt can be effectively restored to meet the specifications required for the construction area.

关 键 词：老化沥青 动态剪切流变仪 弯曲梁蠕变仪 

分 类 号：U416.217[交通运输工程—道路与铁道工程]