Header menu link for other important links
X
Relating quality of construction to performance of foamed asphalt mixes for maintenance and rehabilitation of pavements
Published in Research Publishing Services
2016
Pages: 405 - 414
Abstract
Cold in-place recycling is a process of in-place rehabilitation of distressed pavements without the application of heat. The existing asphalt pavement is milled to a predetermined depth and mixed with foamed binder or emulsion along with virgin aggregates. Foamed asphalt mix (FAM) consists of reclaimed asphalt pavement (RAP) material, foamed bitumen, active filler and virgin aggregates. The material characterization and structural design of FAM are currently in the development stages worldover. The mechanical behavior of a FAM is governed by the amount of cement, foamed asphalt and the percentage of RAP material in the mix. In this study, the effect of RAP percentage on the characteristics of foamed asphalt mixes was examined at two different RAP contents of 45 and 60%. An existing national highway pavement rehabilitated with foamed asphalt mixes in India was considered as a case study. The field core samples were investigated for their volumetric properties. Laboratory samples were fabricated to replicate the field densities and tested for resilient modulus, dynamic modulus and Indirect Tensile Strength. Structural analysis and design of a pavement was carried out using FAM properties obtained from the laboratory tests. The distress predictions from the analysis were compared with the observed field performances. Recycling of asphalt mixes with foamed asphalt was found to be a cost-effective technique for the rehabilitation of pavements when compared to the conventional rehabilitation technique of overlaying with Hot Mix Asphalt (HMA). © Copyright 2016 by Mairepav8 2016 Organizers.
About the journal
Journal8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
PublisherResearch Publishing Services
Open AccessNo
Concepts (21)
  •  related image
    Aggregates
  •  related image
    Asphalt
  •  related image
    Characterization
  •  related image
    Cost benefit analysis
  •  related image
    Cost effectiveness
  •  related image
    Emulsification
  •  related image
    Maintenance
  •  related image
    Recycling
  •  related image
    Structural analysis
  •  related image
    Structural design
  •  related image
    Tensile strength
  •  related image
    Volumetric analysis
  •  related image
    COLD IN-PLACE RECYCLING
  •  related image
    Cost analysis
  •  related image
    Foamed asphalt
  •  related image
    MAINTENANCE AND REHABILITATIONS
  •  related image
    Material characterizations
  •  related image
    Reclaimed asphalt pavements
  •  related image
    REHABILITATION TECHNIQUES
  •  related image
    STRUCTURAL ANALYSIS AND DESIGNS
  •  related image
    Asphalt pavements