Long-life asphalt pavements. Technical version
Publication details: Bryssel European Asphalt Pavement Association, EAPA, 2007Description: 24 sSubject(s): Online resources: Abstract: An important goal in the pavement industry is to provide constructions at ever lower life-cycle costs, a goal requiring continuous development in areas such as design, material characterization and production, as well as maintenance techniques and management. During the last couple of years, the concept of Long-life pavements1 (LLP) has been established in Europe and America. The main purpose of this concept is to develop a framework, in which more cost-effective pavements are produced. The LLP-concept is to some extent based on earlier concepts, such as full-depth, stage-bystage and deep-strength designs, but mainly on more recent advances in material technology, design and functionality. In practice, the intention of the LLP-concept is to significantly extend current pavement design life by restricting distress, such as cracking and rutting, to the pavement surface. Common distress mechanisms such as bottom-up fatigue cracking, rutting in the unbound layers and frost heave should, in principle, be completely eliminated. When the availability of road lanes and the road user delay costs are taken into account in the cost-benefit analyses of pavements it will show that a number of highways in densely populated areas require low maintenance pavements. That means a total reconstruction of a road pavement is hardly possible or even impossible. This is one of the reasons for developing the Long-Life Pavement concept. The purpose of this paper is to provide a state-of-the-art review of developments in long-life asphalt pavements.An important goal in the pavement industry is to provide constructions at ever lower life-cycle costs, a goal requiring continuous development in areas such as design, material characterization and production, as well as maintenance techniques and management. During the last couple of years, the concept of Long-life pavements1 (LLP) has been established in Europe and America. The main purpose of this concept is to develop a framework, in which more cost-effective pavements are produced. The LLP-concept is to some extent based on earlier concepts, such as full-depth, stage-bystage and deep-strength designs, but mainly on more recent advances in material technology, design and functionality. In practice, the intention of the LLP-concept is to significantly extend current pavement design life by restricting distress, such as cracking and rutting, to the pavement surface. Common distress mechanisms such as bottom-up fatigue cracking, rutting in the unbound layers and frost heave should, in principle, be completely eliminated. When the availability of road lanes and the road user delay costs are taken into account in the cost-benefit analyses of pavements it will show that a number of highways in densely populated areas require low maintenance pavements. That means a total reconstruction of a road pavement is hardly possible or even impossible. This is one of the reasons for developing the Long-Life Pavement concept. The purpose of this paper is to provide a state-of-the-art review of developments in long-life asphalt pavements.