Mechanical Characterisation of Hot Mix Recycled Materials

Recycling of pavements is becoming an increasingly popular technique for pavement maintenance/rehabilitation. This study provides a deeper analysis of a mixture that resulted from an earlier study of asphalt mixtures containing 30 to 50% recycled asphalt. Using the Marshall mix design methodology, additional mixtures of identical composition containing 50% recycled asphalt were produced at a range of bitumen contents and were all treated in more detail for permanent deformation and fatigue behavior. The results from both investigations were analyzed, with the objective of verifying if the Marshall mix design method was suitable to design bituminous mixtures with 50% reclaimed material. However, it is important to mention that this study is still not finished and that it will evolve towards the validation of the manufacturing processes and the mechanical properties of the mixture using tests related with the field performance. A conventional mixture of identical gradation and material composition, made of 100% virgin aggregates, was also studied to compare with the recycled mixtures’ behavior. Findings showed that the recycled mixtures offered better resistance to permanent deformation and had a higher stiffness modulus.

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  • Authors:
    • Picado-Santos, Luis G
    • Oliveira, Joel R M
    • Pereira, Paulo A A
  • Publication Date: 2004-12


  • English

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  • Accession Number: 01000310
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 17 2005 11:00AM