STRUCTURAL EVALUATION OF ASPHALT PAVEMENTS FROM LABORATORY MATERIAL TESTING . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

This article presents a method for the assessment of the structural condition of asphalt pavement from laboratory data, which is applicable where the use of deflectometers and plate bearing tests is impossible. Pavement structure is represented by a three-layered system, the base and subbase courses considered as one layer. Elastic moduli for crushed, natural gravel and soil materials can be evaluated by means of a simple empirical formula derived from a comparative experimental study consisting of plate bearing and routine field and laboratory tests. The proposed formula, of general character, introduces compaction degree, dry density and plasticity index as constitutive parameters to determine stiffness for each layer. Unconfined compression and Marshall tests were employed to provide information about asphalt mix stiffness and a probable correlation between the ordinary test parameters and elastic modulus. First stage results from this experimental study yielded modulus values, significantly higher than those derived from widely known methods of general acceptance. Incoherence, however, in arithmetic values of mix stiffness with respect to the compaction energy did not permit the establishment of an adequate relationship. Research work is still active in this direction, examining the variation of asphalt mix stiffness with Marshall stability and in situ compaction degree. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • MOURATIDIS, A
    • ILIOU, N
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00612287
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 82-519-1033-1
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM