Permeable pavements have been used widely across the world to manage urban stormwater. The hydrological behaviour of permeable surfaces is a complex process affected by many factors, such as rainfall intensity, rainfall duration, pavement geometrical conditions, and clogging level of the permeable surface, amongst others. This laboratory study was carried out to assess the influence of clogging level and rainfall intensity on the infiltration capacity of porous mixture surfaces used in Permeable Pavement Systems (PPS). Porous Concrete (PC) and Porous Asphalt (PA) mixtures with different air void contents (15%, 20%, and 25%) were subject to different clogging scenarios by using varying sediment loads (0, 500, and 1000 g/m 2 ). Permeability experiments were carried out for each clogging scenario through a new rainfall simulator specially developed, tailored, and calibrated for the laboratory simulation of a wide range of rainfall events. Permeability measurements were taken under all different scenarios as a result of the combination of the different rainfall events (50, 100, and 150 mm/h) simulated over the specimens of porous mixtures and the sediment loads applied to them. The results showed that the PC mixtures tested perform better than the PA ones in terms of infiltration capacity, showing less potential for clogging and being more easily cleaned by the wash-off produced by the simulated rainfall events.
展开▼
机译：渗透性路面已在世界范围内广泛用于管理城市雨水。渗透性表面的水文行为是一个复杂的过程，受许多因素的影响，例如降雨强度，降雨持续时间，路面几何条件和渗透性表面的堵塞程度等。进行该实验室研究以评估堵塞水平和降雨强度对渗透性路面系统（PPS）中使用的多孔混合物表面渗透能力的影响。通过使用不同的沉积物负荷（0、500和1000 g / m 2），将具有不同气隙含量（15％，20％和25％）的多孔混凝土（PC）和多孔沥青（PA）混合物置于不同的堵塞情况下）。通过专门为各种降雨事件的实验室模拟专门开发，定制和校准的新型降雨模拟器，针对每种堵塞情况进行了渗透性实验。由于在多孔混合物样品上模拟了不同的降雨事件（50、100和150 mm / h），并且对它们施加了沉积物负荷，因此在所有不同情况下进行了渗透率测量。结果表明，测试的PC混合物在渗透能力方面比PA混合物更好，显示出较小的堵塞可能性，并且通过模拟降雨事件产生的冲刷更易于清洗。
展开▼
