CREEP TESTS FOR ASPHALT MIX DESIGN

This article is concerned with creep tests in relation to asphalt mix design. After drawing attention to the deficiencies of existing creep tests, the author refers to A recently developed compressive creep test. The development of ruts is described and a figure given showing how the rate of development of ruts is affected by the number of passes. Creep behaviour is discussed in relation to the mix, pointing out that low q-values can be given by poor aggregate grading or too high a binder content. Details are given of the results of creep tests in relation to temperature and type of binder, and attention is drawn to the similarity between creep and rutting curves. The next part of the article is concerned with work carried out to correlate rut depth under laboratory test conditions with creep test results, using both reciprocating and circular test track apparatus. This is followed by an account of similar work under road conditions. A study is presented of design in relation to creep tests. It is concluded that the creep test is suitable for characterizing the mechanical properties of asphalt mixes in fundamental engineering units and that it has successfully predicted rut depths under laboratory and some (cores) field conditions. Reference is made to further work being carried out to relate creep test results to road performance. /TRRL/

  • Corporate Authors:

    IPC Building and Contract Journals Limited

    Surrey House, 1 Throwley Way
    Sutton, Surrey SM1 4QQ,   England 
  • Authors:
    • Hills, J F
  • Publication Date: 1975-2-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130408
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM