摘要
通过添加大比例布敦岩沥青(BRA)和苯乙烯丁二烯共聚物(SBR)改性沥青,实现热再生沥青混合料综合路用性能、动态回弹模量和抗疲劳性能的提高,基于室内试验和试验段铺筑经验,验证BRA热再生高模量沥青混合料的技术可行性。结果表明:使用3%SBR改性沥青和添加2%~8%BRA可使热再生沥青混合料的车辙试验动稳定度不小于5 000次/mm,且加载60分钟后的车辙变形量不大于2.0 mm,低温弯曲破坏应变不小于2 800με;推荐复配方案的热再生沥青混合料满足高模量沥青混合料技术指标要求。
The comprehensive road performance,dynamic resilience modulus and fatigue resistance of thermal reclaimed asphalt mixture were improved by adding large proportion Budon asphalt(BRA)and styrene butadiene copolymer(SBR)modified asphalt.Based on laboratory test and test section paving experience,the technical feasibility of BRA thermal regeneration high modulus asphalt mixture is verified.The results show that the dynamic stability of rutting test of thermal regeneration asphalt mixture by using 3%SBR modified asphalt and adding 2%−8%BRA is not less than 5000 times/mm,the deformation of rutting after 60 min loading is not more than 2.0 mm,and the bending failure strain at low temperature is not less than 2800με.The thermal reclaimed asphalt mixture in the recommended compound scheme meets the technical index requirements of high modulus asphalt mixture.
作者
乔通
王宏
QIAO Tong;WANG Hong(CCCC First Highway Consultants Co.,Ltd.,Xi'an 710068,China)
出处
《路基工程》
2024年第3期68-74,共7页
Subgrade Engineering
基金
国家重点研发计划:2022年度交通运输行业重点科技项目(2022-MS1-073)。
关键词
路面工程
厂拌
热再生
掺量
高模量
路用性能
回弹模量
疲劳性能
经济性
pavement engineering
plant mix
thermal regeneration
adding amount
high modulus
road performance
resilience modulus
fatigue performance
economy
