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Tang, Zhenzhong (2007) Polishing and skid-resistance of road surfaces. PhD thesis, ENPC p.276.

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Abstract

The thesis deals with road skid resistance, and with the possibility to predict its evolution through laboratory tests and models. First an original laboratory method is presented to polish and to measure the friction coefficient, using the Wehner & Schulze machine, developed in Germany. This method allows the measurement of friction coefficient vs. polishing time. Road sites are monitored to compare laboratory results with actual skid resistance.

In parallel with experiments, mathematical models are built. A 5-parameter best fit model is first proposed, some parameters of which are related with aggregate characteristics, such as PSV, maximum size and microtexture. Then, a more physical model is described, which separates the three main mechanisms (ageing and wear of bitumen, polishing of aggregate particles). An equivalence coefficient is established between heavy lorry traffic and the number of wear cycles in laboratory. Such a model should allow in the future the rational choice of surface material, and the prediction of skid resistance of a new pavement wearing course. Finally, the surface profiles are examined at various polishing states, in order to link skid resistance with roughness parameters and aggregate properties (PSV, MDE, LA).

Item Type:	PhD Thesis (PhD)
Thesis Supervisor:	de Larrard, François
Date:	10 October 2007
Board of examiners:	Berthier, Yves and Huschek, Siegfried and Zahouani, Hassan and Conan, Joël and Delalande, Gérard and Ehret, Pascal and Do, Minh-Tân and de Larrard, François
Ecole Doctorale:	ED 430 MATÉRIAUX, OUVRAGES, DURABILITÉ, ENVIRONNEMENT ET STRUCTURES
Collection (Fonds):	ENPC
Institution:	ENPC
Subjects:	4. Materials Science, Mechanics and Mechanical Engineering
Uncontrolled Keywords:	Adhérence, Décapage, échelle, Indenteur, La, Macrotexture, Mde, Microtexture, Modèles, Polissage, Psv, Revêtement, Route, Vieillissement, Wehner et Schulze, Ageing, Bitumen removal, Indentor, La, Macrotexture, Mde, Microtexture, Models, Polishing, Psv, Road, Scale, Skid resistance, Wearing course, Wehner & Schulze

ID Code:	3623
Deposited By:	Nathalie Kieffer
Deposited On:	10 April 2008

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