PE/TLA复合改性高模量沥青混合料的结构特性
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摘要
为研究PE/TLA复合改性高模量沥青混合料的路用性能,采用抗压回弹模量、动态模量、低温弯曲、高温变形及弯曲疲劳试验对PE/TLA高模量沥青混合料结构的各项性能进行验证。结果显示:PE/TLA高模量沥青混合料具有较高的抗压回弹模量和动态模量、良好的高温抗车辙和抗疲劳性能,而低温抗裂性能、水稳定性能略低于SBS改性沥青混合料;PE/TLA高模量添加剂具有较低为温度敏感性,其抗压回弹模量随温度的增加呈缓慢下降趋势,高温累积变形随荷载作用次数增加而显著提高。
In order to study the pavement performance of PE/TLA composite modified high modulus asphalt mixture,the compressive resilience modulus,dynamic modulus,low temperature bending,high temperature deformation and bending fatigue tests were used to verify the structure performance of PE/TLA high modulus asphalt mixture.The results show that PE/TLA high modulus asphalt mixture has high compressive resilience modulus and dynamic modulus,good high temperature rutting resistance and fatigue resistance,while the low temperature crack resistance and water stability are slightly lower than those of SBS modified asphalt mixture;Besides,PE/TLA high modulus additive has lower temperature sensitivity,and its compressive resilience modulus decreases slowly with the increase of temperature,and the high temperature cumulative deformation increases significantly with the increase of loading times.
In order to study the pavement performance of PE/TLA composite modified high modulus asphalt mixture,the compressive resilience modulus,dynamic modulus,low temperature bending,high temperature deformation and bending fatigue tests were used to verify the structure performance of PE/TLA high modulus asphalt mixture.The results show that PE/TLA high modulus asphalt mixture has high compressive resilience modulus and dynamic modulus,good high temperature rutting resistance and fatigue resistance,while the low temperature crack resistance and water stability are slightly lower than those of SBS modified asphalt mixture;Besides,PE/TLA high modulus additive has lower temperature sensitivity,and its compressive resilience modulus decreases slowly with the increase of temperature,and the high temperature cumulative deformation increases significantly with the increase of loading times.
引文
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[2]王昊鹏,杨军,施晓强,等.高模量改性沥青高温性能的优化评价[J].公路,2015(2):174-179.
[3]沙爱民,周庆华,杨琴.高模量沥青混凝土材料组成设计方法[J].长安大学学报(自然科学版),2009,29(3):1-5.
[4]周庆华,沙爱民.高模量沥青混凝土路面永久变形[J].长安大学学报:自然科学版,2013,33(5):13-16.
[5]周庆华,沙爱民.高模量沥青混凝土路面疲劳研究[J].土木工程与管理学报,2013,30(1):30-34.
[6]王忠锋,左连滨,穆岩.高模量沥青混凝土的路用性能指标及应用[J].筑路机械与施工机械化,2017,34(8):62-66.
[7]崔华杰,李立寒,刘栋.高模量沥青混凝土低温抗裂性能研究[J].公路交通科技(自然科学版),2014,31(2):37-42.
[8]郝培文,李志厚,杨黔,等.掺加复合聚合物高模量沥青混凝土技术性能研究[J].筑路机械与施工机械化,2014,31(1):45-50.
[9]YNU H J L,JUNG H L,HEE M P.Performance Evaluation of High Modulus Asphalt Mixtures for Long Life Asphalt Pavements[J].Construction and Building Materials,2007,21(5):1079-1087.
[10]LI YUN-LIANG,TAN YI-QIU,MENG LIANG.Application Study on High Modulus Asphalt Concrete in Bridge Pavement[J].Advanced Materials Research,2011,243:4424-4427.
[11]马翔,倪富健,陈荣生.沥青混合料动态模量试验及模型预估[J].中国公路学报,2008,21(3):35-39.