Design of Half-Warm Asphalt Mixes with Additives

Warm mix and half-warm mix are type of asphalt mixes that can be compacted at lower temperature than a standard hot mix asphalt (HMA). In this research project, the influence of the use of additive, like Sasobit and Evotherm, as well as the Low Energy Asphalt (LEA) process were studied. First, the influence of the addition of different quantity of Sasobit in different binders was studied. It was found that the addition of only 2% of Sasobit can change the viscosity and the performance grade (PG) of the binder considerably. One of the binder used, a crumb rubber modified, was not affected as much as the other by the addition of Sasobit. Then the influence on the compaction of the addition of Sasobit, Evotherm and the LEA process were evaluated with a gyratory compactor. It was found that when combining Sasobit with the LEA process, it was possible to compact the samples at 80oC and still meet the air voids requirements.

• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Carter, Alan
  • Mainardis, Olivier
  • Perraton, Daniel
• Conference:
  • Transportation Research Board 89th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2010-1-10 to 2010-1-14
• Date: 2010

Language

• English

Media Info

• Media Type: DVD
• Features: Figures; Photos; References; Tables;
• Pagination: 12p
• Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

• TRT Terms: Air voids; Asphalt pavements; Bituminous binders; Bituminous materials; Compaction; Crumb rubber; Mix design; Viscosity; Warm mix paving mixtures
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 01158083
• Record Type: Publication
• Report/Paper Numbers: 10-1756
• Files: TRIS, TRB
• Created Date: May 30 2010 7:44AM