NEW LABORATORY TEST METHODS FOR GRAVEL STABILIZED WITH HYDRAULIC BINDERS

NOUVELLES METHODES D'ESSAIS EN LABORATOIRE DES GRAVES TRAITEES AUX LIANTS HYDRAULIQUES

In view of recent progress in modern pavement design methods, the characterization of materials stabilized with hydraulic binders by means of their compressive strength seems inadequate. New tests carried out in the Laboratorire des Ponts et Chaussees facilitate the characterization of the material subjected either to a single slow or rapid load or to repetitive loading. The test selected is the direct tensile test with recording of the stress/strain curve, which enables the ultimate tensile stress (rt) and the modulus (e) to be determined. The latter permits the determination of the stress conditions of the material subjected to loads. The material is characterized by the 2 parameters (rt and e). The fatigue test facilitates the study of behaviour under repetitive loading. Because of the relatively wide dispersion of the results and for the sake of greater accuracy, fatigue behaviour is characterized not by the Wohler cruve bu by the sigma 6 stress at which the material can withstand a million loadings and by the standard deviation of log n of the number of cycles corresponding to this delta 6 level. Slow variations in pavement stresses due to setting or thermal shrinkage and which are responsible for transverse cracks are studied by means of free shrinkage tests and thermal shrinkage cracking tests. /TRRL/

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Nyugen, A E
  • Publication Date: 1977-9-10

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00194082
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM