An Experience of Rational Mix Design of Recycled Asphalt Concretes on the Basis of International Guidelines

This paper describes how, within pavement maintenance and construction, the increasing use of techniques for asphalt recycling in situ/plant needs a correct mix design process, which the regenerated asphalt can be raised to the required quality. The authors performed an experimental analysis on RAP (Reclaimed Asphalt Pavement), aimed to assess the reliability of the most recent mix design guidelines in this paper. The mix design of asphalt concrete with RAP was performed according to the procedures suggested by the SuPerPave® Mixtures Expert Task Group. Three different percentages of RAP (25, 35 and 50%) were adopted. The quantity of new bitumen (virgin binder) to be added was established taking into account the old asphalt (RAP binder) content and the required properties of final product. The critical temperatures of the binders (that added and the bitumen included in the RAP) were obtained by Rheological tests, using DSR and BBR devices. The performance of the recycled asphalt mixtures was assessed by laboratory procedures provided by the European Specifications.

• Corporate Authors:

  Politecnico di Torino

  Turin,   Italy 
• Authors:
  • AGOSTINACCHIO, M
  • Olita, Saverio
• Conference:
  • Sixth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV6)
  • Location: Turin , Italy
  • Date: 2009-7-8 to 2009-7-10
• Publication Date: 2009

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: 9p
• Monograph Title: International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV6), Sixth Proceedings

Subject/Index Terms

• TRT Terms: Asphalt concrete pavements; Asphalt mixtures; Binders; Guidelines; International; Mix design; Pavement design; Quality control; Recycled materials; Rheological properties; Superpave; Waste products (Materials)
• Subject Areas: Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01139840
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 18 2009 7:07AM