THE BEHAVIOR OF HYDROCARBON MIXES UNDER TENSILE STRESS

COMPORTEMENT EN TRACTION SIMPLE DE ENROBES HYDROCARBONES

A simple tensile test for hydrocarbon mixes was developed by the LCPC and has been in use in certain regional laboratories since 1974. Its purpose is to determine characteristics making in possible to structurally design a pavement from the point of view of failure, or to study and control materials with a view to a given utilization. We are therefore mainly concerned with the modulus and the behaviour under fatigue. We first examine the different mechanisms of deformation of granular media incorporating hydrocarbon binders in order to have a more comprehensible basis for the establishment and interpretation of a law of non-linear behaviour. This law has been established in the case of related tests which make it possible to define moudui. On the basis of relatively extensive studies of a series of very different formulae we arrived at a simplified testing procedure. We then seek to establish a multiple linear correlation between fatigue tests and tensile tests, using notably a factor of non-linearity for measuring damage suffered in the test under a single loading. The different formulae are compared in the context of a two-layer pavement model in which the foundation soil and the external stresses are invariant. The modulus and the admissible deformation under fatigue make it possible to calculate a surface course thickness which can be used as an indicator of quality. The tensile test is then applied to the study of some parameters of formulation: effects of bitumen and filler content, and of the introduction of round sand in bituminous concretes. /Author/

  • Corporate Authors:

    Central Laboratory of Bridges & Highways, France

    75732 Paris,   France 
  • Authors:
    • Linder, R
  • Publication Date: 1977-10

Language

  • French

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 100 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00190171
  • Record Type: Publication
  • Source Agency: Central Laboratory of Bridges & Highways, France
  • Report/Paper Numbers: Research Report 71
  • Files: TRIS
  • Created Date: May 11 1979 12:00AM