2016 International Conference on Sustainable Energy, Environment and Information Engineering (SEEIE 2016) ISBN: 978-1-60595-337-3 Evolution of Skid Resistance of Different Materials for Metro Rolling Tracks C. KHELIFI 1,* , M. KANE 2 and M. ADENOT MEYER 1 1 SIEMENS SAS, 15 avenue André Diligent 59100 Roubaix, France 2 IFSTTAR, Institut Français des Sciences et Technologies des Transport, de l’Aménagement et des Réseaux, Centre de Nantes, Route de Bouaye, CS4, 44341 Bouguenais, France *Corresponding author Keywords: Skid-résistance, Steel, Concrete, Polishing, Friction, Texture. Abstract. This paper investigates the evolution of skid resistance against traffic of different tracks materials for rubber-tired metro. Experimental analysis based on the friction analysis of different track specimens at different polishing states is done. The polishing and friction measurements are performed using the so-called Wehner-Schultz machine. Three materials of which two concrete mixes and steels treated differently at surfaces (before the polishing process) are studied. The results show that concretes offer better skid resistance than steels in the long term, while the initial skid resistance depends exclusively on the treatment applied on the initial surface texture. Introduction The safety of rubber-tired metro depends partially on the skid resistance between the metro tires and the track surfaces. The tracks may be either in steel or in concrete. However, that skid resistance decreases continuously due to the polishing of the surface track texture under the action of the metro traffic [1-3]. The objective of this study is to investigate both the effects of the material type used for the tracks and the initial treatment done on the surface of the tracks on the evolution of skid-résistance provoked by the polishing of the surface due to the metro traffic. Experimental program. Materials and Specimens Concretes. For concrete specimens, two different mixes are investigated. For both concrete types, three different treatments are applied on the surface (surface Chemically treated, brushed concrete, no-treated concrete…). The specimens are sawed to get circular shapes (of 22,5 cm in diameter). See Figure 1. Steels. For the steel specimens, three different initial treatments are investigated: grooved, grooved and shot blasted and Double grooved and shot blasted. See Figure 1. Figure 1. Examples of concrete (left) and steel (right) specimens. 548