STANDARDS FOR AGGREGATES. CHAPTER 5. AGGREGATES FOR BITUMINOUS MATERIALS

This chapter begins with a brief outline of the technology of bituminous materials which includes reference to the intrinsic properties of the materials, the manufacture and laying of asphalt mixes, surface treatments, and some of the factors that influence the modes of failure of an asphalt pavement. This is followed by a review of the mechanical properties of bituminous mixtures and how they are controlled by the relative proportions and physical properties of the bitumen and aggregate and the compacted density of the mixture. The final section gives an account of the properties currently specified by British Standards BS 594 and BS 4987, the Department of Transport Specification for Highway Works, and the Property Services Agency Airfields Branch Specification Part 4 for aggregates in bituminous mixtures at all levels of construction in flexible pavements for roads and airfields. Reference is made to the modified dense bitumen macadam base and basecourse material DBM 50, which has a 50 pen bitumen and heavy duty macadam (HDM) which has, in addition, a high filler content of 7 to 11 percent. A brief description is given of the Marshall test, used to determine the optimum bitumen content of a bituminous mixture for a given aggregate and grading. For the covering abstract see IRRD 836550. (Author/TRRL)

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  • Corporate Authors:

    ELLIS HORWOOD LIMITED

    MARKET CROSS HOUSE, COOPER STREET
    CHICHESTER, WEST SUSSEX  United Kingdom  PO19 1EB
  • Authors:
    • Broadhead, G E
    • Hills, J F
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00617336
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0-13-842477-2
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1991 12:00AM