Mechanical properties of used-tyre rubber Available to Purchase

A recent study was undertaken to investigate the engineering benefits of incorporating crumb rubber from waste tyres into paving asphalt by means of the wet process. The study focused on evaluation of performance-based properties of asphaltic materials used to safeguard against anticipated distress modes, exemplified by permanent deformation (rutting) and fatigue cracking. The influence of rubber and bitumen origins as well as rubber content were considered in the study, which focused on two types of surface course materials: a stone mastic asphalt and a close-graded dense bitumen macadam. The paper presents and discusses laboratory-obtained results which demonstrate that there is a clear technical (and environmental) incentive in adding waste tyre rubber to asphalt used on roads with varying traffic demands.