STRENGTH BEHAVIOUR OF SOIL-ASPHALT MIXTURES IN COMPRESSION

Some of the basic factors that influence the behaviour of soil-asphalt mixtures are investigated in an attempt to gain information that will aid in the selection of design criteria for soil-asphalt road bases. Statically compacted cylindrical samples of soil-asphalt mixture were prepared and tested under uniaxial and triaxial compression. The factors investigated include binder content in mix, moulding samples, uniaxial deformation rates and curing time. It is shown that ultimate compressive strength increases as binder content in mix decreases; and that a brittle-like behaviour is observed when binder content is low. The addition of a moderate amount of water to the air-dried soil plus binder, facilitates mixing and causes an increase in ultimate compressive strength of test samples, coupled with increase in moulding density. The increase in ultimate compressive strength as a result of higher uniaxial deformation rates was more pronounced when rates were higher than 0.5 in/min and for samples with low binder content. Results also indicate that the ultimate strength increases with increasing curing time after moulding. The rate of this increase seems most important during the early days of curing particularly within the first three weeks. (A) /TRRL/

  • Availability:
  • Corporate Authors:

    Whitehall Technical Press Limited

    Wrotham Place
    Wrotham, Sevenoaks, Kent ME14 1PE,   England 
  • Authors:
    • Alkili, W
  • Publication Date: 1975-10

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 9-13
  • Serial:
    • Highway Engineer
    • Volume: 22
    • Issue Number: 10
    • Publisher: Whitehall Press Limited
    • ISSN: 0306-6452

Subject/Index Terms

Filing Info

  • Accession Number: 00132260
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 13 1976 12:00AM