摘要
针对就地热再生在施工过程中对原路面加热温度较高、能耗大、烟气污染严重的问题,研究将表面活性剂类温拌剂与再生剂进行复配生成新型添加剂,并用于就地热再生沥青混合料中。采用车辙试验、低温小梁弯曲试验、残留稳定度试验及冻融劈裂试验,测试并分析就地温拌再生沥青混合料和就地热再生沥青混合料性能差异。结果表明:就地温拌再生沥青混合料各项性能满足规范要求,冻融劈裂(TSR)有小幅提高,因此,就地热再生沥青混合料中掺加温拌剂并未对其性能产生不利影响,反之对水稳定性有所提高。通过试验路验证,摊铺温度降低20℃后,压实度、渗水系数均与就地热再生沥青混合料相当。
During the construction process of asphalt pavement in-place recycling,the heating temperature of the original pavement was relatively high,resulting in high energy consumption and serious smoke pollution.In this paper,a surfactant type warm mixing agent and a rejuvenating agent were mixed and used in the in-place recycled asphalt mixture.The in-place recycled asphalt mixture performance differences between warm mixing technology and conventional mixing were tested and analyzed by rutting test,low-temperature beam bending test,residual stability test,and freeze-thaw splitting test,and a test section was paved on site.The results showed that the properties of the in-place recycled asphalt mixture warm mixing technology meet the specification requirements,and the freeze-thaw spliting(TSR)has been slightly improved.Therefore,the addition of warm mixing agent does not have a negative impact on the performance of in-place recycled asphalt mixture,and conversely,it improves the water stability of pavement.Through the verification of the trial road sections,the paving temperature was reduced by 20℃,the compactness and water permeability coefficient were equivalent to those of the in-place recycled asphalt mixture without warm mixing technology.
作者
曾蔚
徐剑
王鹏
ZENG Wei;XU Jian;WANG Peng(Research Institute of Highway Ministry of Transport Key Laboratory of Transport Industry of Road Structure and Material,Bejing 100088)
出处
《石油沥青》
2023年第3期43-47,52,共6页
Petroleum Asphalt
基金
非金属材料创新中心应用示范类项目(编号:2022SFP3-1)。
关键词
就地热再生
温拌技术
沥青混合料
路用性能
冻融劈裂
in-place recycling
warm mixing technology
asphalt mixture
road performance
freeze-thaw spliting
