Chemical additives for warm mix asphalts

Recently, new technologies have been developed to reduce the environmental impact of the road construction industry. Among them, the technologies that allow a substantial reduction on the energy consumed during the production of hot asphalt mixtures have taken a very important role. There are several technologies, based on very different physicochemical phenomena that allow producing what is now known as warm mix asphalts. The work presented here describes the use of one particular type of warm mix asphalt technology based on chemical additives. This technology has been already proven to work under very different laboratory and field job conditions. It is based on the use of surfactant-type additives that enhance the workability of an asphalt mix allowing it to be paved and compacted at lower temperatures. Only a low concentration, from 0.2 to 0.5 weight percent (wt %) with respect of bitumen, is required to have the desired effect. The several advantages observed by the use of this warm mix asphalt technology are presented in this work, including field job examples, measured energy consumption reductions and environmental measurements. It is also a matter of this work the discussion of the enhanced functionality that this particular kind of additives may provide. Examples of such are their role as adhesion promoters in the asphalt mixture and as aids on the incorporation of higher amounts of reclaimed asphalt pavement.

• Availability:
  • Find a library where document is available. Order URL: http://www.piarc.org/en/order-library/13949-en-Proceedings%20of%20the%20XXIVth%20World%20Road%20Congress,%20Mexico%20-%202011.htm
• Supplemental Notes:
  • Abstract reprinted with permission of the World Road Association – PIARC.
• Corporate Authors:

  World Road Association (PIARC)

  La Grande Arche, Paroi Nord, Niveau 5
  F-92055 La Defense Cedex,   France 
• Authors:
  • Gonzalez-Leon, J
  • Caujolle, P
  • Luca, V
  • Jorda, E
• Conference:
  • 24th World Road Congress
  • Location: Mexico City , Mexico
  • Date: 2011-9-26 to 2011-9-30
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 13p
• Monograph Title: 24th World Road Congress Proceedings: Roads for a Better Life: Mobility, Sustainability and Development

Subject/Index Terms

• TRT Terms: Additives; Adhesion; Asphalt mixtures; Asphalt pavements; Chemicals; Energy consumption; Environmental impacts; Warm mix paving mixtures
• Subject Areas: Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01515896
• Record Type: Publication
• ISBN: 2840602679
• Files: TRIS
• Created Date: Feb 25 2014 10:05AM