There are two principal methods of controlling reflective cracking either by distributing the stresses to a level lower than that causing failure in the overlay or by increasing the strain capacity of the overlay. The author considers only the stress relieving approach and considers that the entire area of pavement should be treated as it will cover potential cracks and is easier to mechanise. Of the three options, the use of geotextile rather than a geogrid or an in situ layer is recommended. An example is given of the use of a geotextile fabric on a heavily trafficked road in Kent, where the contractor designed and manufactured a roller and laying unit which could be fitted to the front of the lorry carrying it to site. The pavement is sprayed with a bitumen binder and the fabric rolled over it under light tension before paving. To avoid contamination of the binder, a dedicated tanker was used, fitted with a 4.1m spray bar to allow single pass spraying. Overlays of between 40mm and 220mm have been used and the fabric can be laid directly onto a planed surface but may require a regulating layer if the surface is very rough. Fabrics can also be used in new construction to give an increased life within the same budget or to reduce costs for the same life.

  • Availability:
  • Corporate Authors:

    Palladian Publications Limited

    14 Park Street
    Windsor, Berkshire,   England 
  • Authors:
    • Ladner, S
  • Publication Date: 1990-1-2


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00606527
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM