Friction and the texture of aggregate particles used in the road surface course

Dunford, Alan (2013) Friction and the texture of aggregate particles used in the road surface course. PhD thesis, University of Nottingham.

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Skid resistance, the road surface’s contribution to friction, is a crucial property of a road surface course required to maintain a safe and serviceable road network.

Measurement of skid resistance is restricted by the need to measure the forces acting on a rubber wheel or slider while it is dragged across the surface. If the skid resistance of the road could be determined without the need for contact then measurement could be cheaper and more thorough.

One route to achieving this goal is by measurement of the texture of the road that generates the friction experienced by a sliding tyre. However, the form and scale of the texture required is not well defined.

The work presented in this thesis attempts to establish a robust methodology for measurement of texture on the surfaces of aggregate particles (the main constituent of the road surface course) so that it can be compared with friction. The stages of development are described in detail and the methodology is employed to examine the changing texture on two types of aggregate.

The mechanisms by which these aggregates polish, methods for characterising their surface texture, and the consequences for the friction they are able to generate are explored.

Item Type: Thesis (University of Nottingham only) (PhD)
Supervisors: Parry, A.R.
Shipway, P.H.
Viner, H.E.
Subjects: T Technology > TE Highway engineering. Roads and pavements
Faculties/Schools: UK Campuses > Faculty of Engineering
Item ID: 13412
Depositing User: EP, Services
Date Deposited: 03 Oct 2013 09:03
Last Modified: 16 Dec 2017 04:39

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