Suitability of PoroElastic Road Surface (PERS) for urban roads in cold regions: Mechanical and functional performance assessment
Suitability of PoroElastic Road Surface (PERS) for urban roads in cold regions: Mechanical and functional performance assessment
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DOI：
10.1016/j.jclepro.2017.07.228
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发表时间：
2017-11
影响因子：
11.1
通讯作者：
Dawei Wang;Pengfei Liu;Z. Leng;Chao Leng;G. Lu;Micha Buch;M. Oeser
中科院分区：
文献类型：
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作者：
Dawei Wang;Pengfei Liu;Z. Leng;Chao Leng;G. Lu;Micha Buch;M. Oeser
近年来，随着交通量和车辆使用量的不断增长，废旧轮胎的再利用成为一个挑战。多孔弹性路面(PERS)是一种将轮胎橡胶回收到低噪声路面中的新型路面。本研究旨在探讨PERS在寒冷地区城市道路上的适用性。以常规排水性沥青(PA)为参照物，采用室内试验和数值模拟相结合的方法对PERS的力学性能和功能性能进行了表征。结果表明，低温下PERS的拉伸强度储备高于PA，而极限拉应变则远大于PA。与PA相比，PERS的吸声系数具有更高的峰值和更宽的峰值，表明PERS的吸声性能更好。具有PA面层的路面更容易出现表面裂缝，这是PERS中不存在的，因为在某些特定的荷载偏移位置处存在较大的拉应力。在相同温度下，PERS层上冰层的变形大于PA层上的变形，PERS层的最大水平应变大于PA层的最大水平应变。这些发现证明了PERS在寒冷地区城市道路上的适用性，可以带来显著的经济效益和社会效益。
Reuse of scrap tires has become a challenge with the ever-growing traffic volume and usage of vehicles in recent years. Poroelastic Road Surface (PERS) is a novel type of pavement surface, which recycles tire rubber into low-noise pavements. This study aims to explore the suitability of PERS for urban roads in cold regions. Both laboratory tests and numerical simulations were conducted to characterize the mechanical and functional performances of PERS using a conventional porous asphalt (PA) as reference. The results indicated that the tensile strength reserve, which is the difference between the average tensile strength and the cooling-related tensile stress at a certain temperature, of PERS is higher than that of the PA at low temperature, while the ultimate tensile strain of the PERS is much larger than PA. The sound absorption coefficients of PERS have higher and wider peak compared with PA, indicating better noise absorption performance. The pavement with PA surface is more prone to surface cracks due to large tensile stresses at some specific offset locations from the loads, which do not exist in PERS. The deformation of the ice layer on top the PERS layer is larger than that on top of the PA layer at the same temperature, and the maximum horizontal strain of the PERS layer is larger than that of the PA. These findings prove the suitability of PERS for urban roads in cold regions, which can lead to significant economic and social benefits.