15 Jun , 2020 - Papers

Abstract submitted to: 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA). 29 June – 1 July 2021, Trondheim, Norway.

Praticò F.G., Briante P.G., Colicchio G., Fedele R.

Abstract: The interaction among electric vehicles (EVs) and road pavements affects road performance in a different way with respect to internal combustion engine vehicles (ICEVs). Consequently, the design of asphalt concrete road pavements for EVs should take into account both functional and mechanistic characteristics. In particular, porosity, resistivity, tortuosity and thickness should be considered to estimate the acoustic absorption, while surface texture should be measured to characterize road pavements consisting in both traditional and recycled materials. Unfortunately, there is still lack of methods to consider both functional and mechanistic characteristics for EVs.  Based on the above, the main objective of the study here presented is to set up and apply a method to predict the acoustic and mechanistic performance of road pavements to face EV-related problems.  GAP graded and Dense graded (i.e., GAP – AC6o, and DGFC – AC6d) mixtures, with different crumb rubber percentages, were produced using the gyratory compactor. Consequently, experimental investigations were carried out to derive acoustic and mechanic properties (including acoustic absorption, airflow resistivity, skid resistance, permeability, and surface texture.

Finally, the prediction model was set up and validated using the experimental results.Results show that the proposed model is helpful in selecting and ranking bituminous mixtures based on requirements.

Keywords: Electric vehicle, Road Pavement, Acoustic Absorption, Airflow resistivity, Recycled materials.