SMOOTHING THE WAY FORWARD

In this article, bituminous materials available for surface treatments are reviewed. Hot rolled asphalt is a commonly used resurfacing material in the UK. To maintain skid resistance in wet weather, the macrotexture of the surface is controlled by a minimum requirement of texture depth. Two methods are commonly used for determining this value: (1) the sand patch test; and (2) the mini texture meter. The two methods give different values of texture depth, resulting in a 1.5 mm sand patch requirement translating into a laser measured value of 1.03. No maximum value is given, which can result in contractors using too many pre-coated chippings on the fresh surface, leading to bunching of chips and subsequent chip loss, making it difficult to achieve the standards required in British Standard BS 594. Several mixes for bituminous macadams are described in British Standard BS 4987. The latest edition includes a 6 mm dense wearing course which has been used by counties in the south west, including Wiltshire, using proprietory specifications.

  • Availability:
  • Corporate Authors:

    Reed Business Information, Limited

    Quadrant House, The Quadrant
    Brighton Road
    Sutton, Surrey  United Kingdom  SM2 5AS
  • Authors:
    • RAMSEY, S
  • Publication Date: 1990-4-26

Language

  • English

Media Info

  • Pagination: p. 30-31
  • Serial:
    • SURVEYOR
    • Volume: 173
    • Issue Number: 5092
    • Publisher: Hemming Group, Limited
    • ISSN: 0039-6303

Subject/Index Terms

Filing Info

  • Accession Number: 00606747
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM