DEVELOPMENTS IN COATED MATERIALS

This article is concerned with the coated road materials used in the UK and, in particular, the changes that have been implemented in recent revisions of the appropriate British standards (4987 and 594). The different types of materials used are outlined together with their composition. The author continues by discussing coated macadams (open-, medium-, fine-textured and dense), their specification and uses and follows this with a similar discussion of rolled asphalts. Attention is drawn to the changes that have been made to the standards and, in particular, information is given on the alternative method of determining binder content (Marshall test) which is now specified in BS 594. This is followed by a discussion of specifications and methods of checking for compliance, and of the "end-result" specifications which have been used recently in the USA. The manufacture of mixes is the subject of the next part of the article and includes references to new processes which reduce dust emission. In conclusion future trends are discussed particularly in the areas of skid resistance and resistance to permanent deformation which has become of greater interest as a result of the upward trend in vehicle loading. /TRRL/

  • Availability:
  • Corporate Authors:

    Quarry Managers Journal Limited

    62-64 Baker Street
    London W1M 2BN,   England 
  • Authors:
    • Peattie, K R
  • Publication Date: 1974-9

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 137-144
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00096880
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1975 12:00AM