Characterisation of Dense-Graded Asphalt Cold Mixtures for Pavement Rehabilitation

摘要

This paper describes the main results achieved so far in a research study that is being carried out by "Laboratorio Nacional de Engenharia Civil" (LNEC), concerning the use of asphalt cold mixtures in pavement rehabilitation in Portugal, specifically dense-graded asphalt cold mixtures applied as overlays and "in situ" cold recycling of existing pavement layers. The work performed by LNEC was done in the context of the monitoring of rehabilitation works of road sections in Portugal, where these techniques were used. Studies concerning mix design methods, compaction and curing were performed. After the rehabilitation works have been finished, a performance monitoring program was started, in order to achieve results concerning the structural behaviour and the performance of the cold asphalt layers.