Relationship of asphalt pavement skid resistance to aggregate properties

A method was developed in this study for estimating the skid resistance of an asphalt mixture based on aggregate characteristics and gradation. Asphalt mixture slabs with different combinations of aggregate sources and mixture designs were fabricated in the laboratory and their skid resistance was measured after different polishing intervals. The wheel polishing device developed by the National Center for Asphalt Technology (NCAT) was used for polishing the slabs. Frictional characteristics of each slab were measured by the sand patch method, British Pendulum, Dynamic Friction Tester (DFT), and Circular Texture Meter (CTMeter). Aggregates were characterized using the Micro-Deval abrasion test and texture analysis using the Aggregate Imaging System (AIMS). The aggregate gradation was described using the two-parameter cumulative Weibull distribution function. The data statistical analysis has led to the development of a model for the International Friction Index (IFI). The IFI model's parameters were found to be functions of aggregate texture measured using AIMS and Weibull distribution parameters describing aggregate gradation. This model allows estimating the frictional characteristics of an asphalt mixture during the mixture design stage. 2008 Taylor & Francis Group, London.

Efficient Transportation and Pavement Systems: Characterization, Mechanisms, Simulation, and Modeling - Proceedings of the 4th International Gulf Conference on Roads

Relationship of asphalt pavement skid resistance to aggregate properties Conference Paper