It is the purpose of this paper to point out the problems associated with flexible pavements, to summarize the research that the Joint High­ way Research Project has done in this field, and to outline present endeavors. In so doing, it must be recognized, first of all that flexiblepavement research, or the general problem of flexible-pavement design, consists of two parts. One of these is the m...

The unbound granular material used in flexible road pavements exhibits an elastoplastic behaviour under repetitive traffic loads. Permanent deformation occurring on pavement surface load is one of the main problems affecting performance. Therefore, many permanent models for calculating rutting have recently been developed by researchers. Most these studies involve performance dynamic triaxial t...

owing to the proximity of certain locations to the thermal power stations, it has always been efforts of engineers to enhance the flyash utilization rate in various civil engineering constructions adopting suitable strategies. in the present study, a soilflyash interface mechanism has been evolved using different soil-flyash ratios to upgrade significantly stabilization of supporting medium bas...

The subject of this paper is an environmental life cycle assessment (LCA) and life cycle cost analysis (LCCA) of processes needed to construct and maintain representative Swiss asphalt, concrete, and composite pavements (including subbase layers) applicable for the Swiss national road network over a period of 75 years. The environmental indicators analyzed are the global warming potential indic...

Rutting is one of the major load-related distresses in airport flexible pavements. Rutting in paving materials develop gradually with an increasing number of load applications, usually appearing as longitudinal depressions in the wheel paths and it may be accompanied by small upheavals to the sides. Significant research has been conducted to determine the factors which affect rutting and how th...

This Special Issue is dedicated to the modification of asphalt binders using certain additives as nanomaterials or special modifiers enhance performance and durability, seen through improved resistance ageing caused by climatic conditions, concrete forming core layers flexible pavements [...]