Evolution of road-surface skid-resistance and texture due to polishing

A study of the laboratory polishing behavior of granite as road surfacing aggregate

“…Different test methods, for example the polished stone value (PSV) according to EN 1097-8 and the Wehner/Schulze test (W/S) according to the EN 12697-49, are applied to determine the polishing resistance of the aggregates. The changes of aggregate textures due to the polishing action in PSV or W/S tests have been investigated quantitatively with different texture parameters [6,[8][9][10][11]. Based on these aggregate tests and roughness parameters for a given set of laboratory conditions, several prediction models for asphalt roads have been developed [6,[12][13][14][15][16][17].…”

Evaluation of Microtexture Changes of Coarse Aggregate during Simulated Polishing

“…In France a model was developed which describes skid resistance to get a better understanding of the influence of the polishing process on the evolution of surface texture. The model was based on the description of geometry of microtexture on the grain surface [2,3]. In other studies the analyses of microtexture were conducted on the basis of microscope images of aggregate [5,10,14].…”

Three-dimensional characterisation of surface texture for road stones undergoing simulated traffic wear

“…Several attempts have been made to characterise surface microtexture in such a way that it can be directly related to friction [3,4]. Due to the complexity of the interaction and the variability of the surface (aggregates typically having random, naturally formed surface texture), conclusive results have not been demonstrated.…”

“…The experiment is complementary to the work described by researchers in France, also using the Wehner-Schulze procedure to simulate the polishing action of traffic; in one experiment, two types of aggregate were polished and surface line profile measurements were taken at three stages [4]. Characterisation of surface roughness was undertaken using R q and a proprietary calculation of the sharpness of surface asperities.…”