Abstract
Permeable pavements are increasingly being used as urban stormwater management systems. Permeable pavement systems enable stormwater to infiltrate through the pavement surface and into the filter layer. Three common recycled construction and demolition (CD crushed brick (CB), recycled concrete aggregate (RCA) and reclaimed asphalt pavement (RAP) were investigated in combination with nonwoven geotextile to assess their suitability as filter materials in permeable pavements. A series of laboratory tests was undertaken to assess the geotechnical and hydraulic characteristics of the CD however has potential to cause more clogging due to continuous accumulations of sediments in a long period. In terms of usage in permeable pavement filter layer, C&D materials were found to have geotechnical and hydraulic properties equivalent or superior to that of typical quarry granular materials. The Model for Urban Stormwater Improvement Conceptualisation (MUSIC) was furthermore employed to predict the pollutant removal efficiency of the C&D materials and the predicted results were validated with the laboratory experiments.
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