Traditional pavements in urban areas are often impervious, resulting in augmented surface run-off during rainfalls, thereby leading to flash floods and pollution of waterways. In contrast, permeable pavements allow percolation of water through their surface layers, thus alleviating the harmful impacts associated with traditional pavements. This study reports on the mechanical performance of a large-scale permeable pavement trial site — constructed by tire- and rock-derived aggregates (TDA and RDA) bonded together using a polyurethane (PUR)-based binder — located at a car park in South Australia. An area of approximately 400 m² was paved using different TDA-based mix designs, i.e., different RDA contents and sizes/shapes, and different PUR contents. A series of unconfined compression tests were carried out alongside a six-month field performance monitoring program — including in-situ light-weight deflectometer tests, and strain measurements by optic fiber sensing — to assess the pavement’s true potential under live traffic. The greater the TDA and PUR contents, the lower and higher the pavement’s strength and stiffness, respectively. Meanwhile, the development of strain (and hence deformability) was in favor of both the TDA and PUR contents. An increase in RDA size, which promotes an induced inter-particle frictional resistance in the soft–rigid matrix, was also found to enhance the pavement’s strength/stiffness while offering a further reduction in its developed strain. Moreover, the greater the RDA angularity, the more effective the mechanical interlocking (and hence interfacial friction) generated between the soft and rigid particles, and thus the higher the developed strength/stiffness. Although effective under low–medium traffic loads imposed by passenger vehicles inside the parking bays, the TDA-based technology (with the implemented mixture designs) was not as effective in sustaining high traffic flows within the parking aisles, e.g., U-turns imposed by light–medium trucks.

城市地区的传统人行道通常是不透水的，导致降雨期间地表径流增加，从而导致山洪暴发和水道污染。相反，可渗透的路面允许水渗过其表层，从而减轻了与传统路面相关的有害影响。这项研究报告了位于南部停车场的大型渗透性路面试验场的机械性能-由轮胎和岩石衍生的骨料（TDA和RDA）使用聚氨酯（PUR）基粘合剂粘结在一起澳大利亚。面积约400 m ²使用不同的基于TDA的混合设计（即不同的RDA含量和尺寸/形状以及不同的PUR含量）铺砌而成。除了进行为期六个月的现场性能监控程序外，还进行了一系列无限制的压缩测试-包括现场轻型挠度计测试以及通过光纤传感进行的应变测量-以评估人行道在实际交通中的真实潜力。TDA和PUR含量越高，路面的强度和刚度分别越低和越高。同时，应变的发展（因此变形性）有利于TDA和PUR含量。还发现，RDA尺寸的增加会促进软硬基体中引起的颗粒间摩擦阻力，同时还可以增强人行道的强度/刚度，同时进一步降低其发展出的应变。此外，RDA的角度越大，在软质和硬质颗粒之间产生的机械互锁（以及界面摩擦）越有效，因此产生的强度/刚度越高。尽管在停车位内客车施加的中低交通负荷下有效，但基于TDA的技术（采用已实施的混合设计）在维持停车通道内的高交通流量（例如，由U形弯道造成的掉头）方面并不那么有效。轻型中型卡车。