ABSTRACT
Porous asphalt concretes have outstanding properties in terms of drainability (D), macro-texture (MTD), and friction (PTV). Lower specification limits are usually 8-18 l/min (D), 0.8-1 mm (MTD), and 45 (PTV). Unfortunately, surface properties decay over time, which impacts safety and quietness. This implies consequences and criticalities in terms of asset management and sustainability, namely: i) algorithms for trigger limit identification per single property; ii) safety concerns; iii) uncertainty in terms of rehabilitation or maintenance strategy. Based on the above the objective of this study is to investigate the impact of time, position, and treatment on the surface properties of porous asphalt concretes. Surface properties were gathered and analyzed as a function of road and pavement characteristics. Preliminary results show that surface properties of porous asphalt concretes decay over time. This phenomenon depends on many variables, among which pavement type, position in the lane, type of lane, hydrological parameters, and position.
