GEOGRIDS IN REINFORCING ASPHALTIC PAVEMENTS . HIGHWAYS SUPPLEMENT: ASPHALT 90

Geogrids have been used in the past few years in an attempt to increase pavement life, reduce rutting and reflective cracking. The type of grids discussed are either polypropylene or the more flexible high modulus woven polyester fibres. The authors describe the properties of three different types of grid, giving details of their methods of installation. The efficiency of their use in reinforcing asphaltic pavements where a reduction in pavement thickness can be achieved is examined. Results have shown some early failures, generally associated with faulty installation. The grid will lift where close contact is not made over its length causing potholing and failure where insufficient cover is present. The stiffer type of grid must be tensioned and each end of the roll anchored. The grid must be held on a flat substrate by means of a chip seal. The more flexible type of grid is normally held down by bitumen or emulsion. A regulating layer may be required by both types. Because of their relatively high cost, geotextile treatment needs to be fully effective to be justified. For the covering abstract of the supplement see IRRD 828953.

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  • Corporate Authors:

    FAVERSHAM HOUSE GROUP LTD

    FAVERSHAM HOUSE, 111 ST JAMES'S ROAD
    CROYDON, SURREY  United Kingdom  CR9 2TH
  • Authors:
    • BUIST, D S
    • INESON, P R
  • Publication Date: 1990-1

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00604118
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 28 1991 12:00AM