EngineeringCivil EngineeringMechanical Behavior Of MaterialsPavement EngineeringThermal AnalysisAsphalt MaterialsHighway PavementsPavement ConstructionPavement DesignPavement MaterialsPavement Performance AnalysisAsphalt BinderAsphalt MixturesDeformationFlexible PavementsRuttingRutting AnalysisRutting Of PavementsTemperature Effects On Pavements
In a circular laboratory test track the rutting of flexible pavements has been studied at various temperatures under well-controlled conditions. It has been found that temperature has a great influenge on the depth of rutting, the increase in rutting over a temperature range of 20-60 degrees C. being much larger than the increase in calculated elastic deformation. The permanent deformation per wheel passage correlates with the stiffness of the asphalt binder used and decreases with increasing number of wheel passages. An increase in thickness of the asphalt layer leads to a distinct reduction in subgrade deformation. The change in thickness through rutting is not larger for a 20-cm than for a 10-cm asphalt layer. Proper mix design proves to be an important factor in relation with permanent deformation. /AUTHOR/