摘要
针对钢桥面铺装材料性能的不足,选择高温聚氨酯改性沥青作为混合料黏结体系及主要强度体系。选择一款高温聚氨酯体系改性沥青材料,通过力学拉伸性能测试、布氏黏度测试及相容性测试,确定该体系下聚氨酯质量分数为50%,施工温度为170℃。对聚氨酯改性沥青混合料进行路用性能测试。结果表明:高温聚氨酯改性沥青混合料可操作时间约为2 h,低温抗裂性能优异,-10℃条件下最大弯拉应变大于10 000με,整体路用性能良好,满足规范要求。
In view of the lack of performance of steel bridge deck paving materials,high-temperature polyurethane modified bitumen was selected as the mixture bonding system and main strength system.In this paper,a high-temperature polyurethane system modified bitumen material was selected,and the suitable mass fraction of polyurethane under the system was determined to be 50% and the suitable construction temperature was determined to be 170 ℃ through the mechanical tensile property test,Brinell viscosity test and compatibility test.Road performance of polyurethane modified asphalt mixtures was tested.The test results showed that the operating time of high-temperature polyurethane modified asphalt mixture was about 2 h,the low temperature crack resistance was excellent,the maximum bending tensile strain at-10 ℃ was greater than 10 000 με,and the overall road performance was good,which met the requirements of the specification.
作者
赵宏天
姜添镪
李凯
徐建晖
刘攀
刘灿
李媛媛
ZHAO Hong-tian;JIANG Tian-qiang;LI Kai;XV Jian-hui;LIU Pan;LIU Can;LI Yuan-yuan(Chongqing Jiaotong University,Chongqing 404100,China;Chongqing Zhixiang Paving Technology Engineering Co.,Ltd.,Chongqing 404100,China)
出处
《当代化工》
CAS
2023年第6期1297-1302,共6页
Contemporary Chemical Industry
基金
重庆市研究生联合培养基地建设项目(项目编号:JDLHPYJD2021010)
重庆市技术创新与应用发展专项面上项目,高性能自流平聚氨酯弹性混凝土开发及应用(项目编号:cstc2020jscx-msxmX0172)。
关键词
聚氨酯改性沥青
钢桥面铺装
混合料
路用性能
Polyurethane modified bitumen
Steel bridge deck paving
Mixtures
Road performance
