QUIET AND SOFT RIDING MATERIALS USING TYRE RUBBER CRUMB IN A MODIFIED BINDER

Research has continued worldwide for over a century on improving the performance of asphaltic concrete by adding natural or synthetic rubber to a bitumen binder. Interest in this method has recently been increased by its potential as a recycling option for used tyres. There are two processes currently: (1) the 'wet process', which heats and reacts crumb rubber with hot bitumen to form a rubberised binder, asphalt rubber binder (ARB); and (2) the 'in situ system', which uses crumb rubber as an aggregate which is added to hot aggregate, before adding the bitumen, and at the recycle fit opening in a continuous or drum-dryer operation. This paper discusses aspects of both these processes. It outlines the properties of ARB, and indicates some production and technical barriers to its manufacture. It considers some properties of porous asphalt with ARB and stone mastic asphalt with WSARB. Hot mixes prepared with ARB are the quietest and softest surface layers ever tested in France. The in-situ ARB system for road surface layers has been used on many roads in France, and is much easier for contractors to use, because it needs no special equipment. It is a good solution, because it uses as a raw material old tyres, whose stockpiles at present cause much environmental damage and are often a fire hazard.

• Corporate Authors:

  INSTITUTE OF ASPHALT TECHNOLOGY

  PAPER MEWS PLACE, 290 HIGH STREET
  DORKING, SURREY  United Kingdom  RH4 1QT
• Authors:
  • SAINTON, A
• Publication Date: 1999

Language

• English

Media Info

• Pagination: p. 23-5
• Serial:
  • THE ASPHALT YEARBOOK 1999
  • Publisher: INSTITUTE OF ASPHALT TECHNOLOGY

Subject/Index Terms

• TRT Terms: Asphalt; Binders; Bitumen; Concrete; Hot coated materials; Improvements; Mastic asphalt; Methodology; Mixtures; Porous materials; Properties of materials; Recycling; Rubber; Tires
• Geographic Terms: France
• ITRD Terms: 4948: Binder; 4963: Bitumen; 4755: Concrete; 8036: France; 4997: Hot coated material; 9108: Improvement; 9102: Method; 9047: Mixture; 4946: Porous asphalt; 5925: Properties; 4573: Recycling (mater); 7494: Rubber; 1381: Tyre
• Subject Areas: Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00766961
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Aug 2 1999 12:00AM