Pedestrian slips, trips and falls account for around one in three major workplace accidents. Many of these result from poor traction caused by liquid and particulate contamination. The mechanisms behind lubrication for liquid contaminants within the shoe-floor contact are well understood, the same cannot be said for particulate contaminants. This paper considers the key parameters controlling friction in a shoe-floor contact contaminated with particles of different size. Experiments were conducted using a Stanley Pendulum Tester. Results suggest the adhesive friction is significantly affected by particulate contaminants whilst the hysteretic component is not. Three lubrication mechanisms, sliding, shearing and rolling have been observed depending on floor roughness, particle size and shape factor. A simple map showing the regimes where these can occur is presented.

This content is only available via PDF.
You do not currently have access to this content.