GRAVEL-CEMENT: (1) MECHANICAL AND PHYSICAL CHARACTERISTICS - WORKABILITY OF GRAVEL-CEMENT - INDEX OF THE MINERALOGICAL NATURE OF CEMENT

GRAVES-CIMENT: 1) CARACTERISTIQUES MECANIQUES ET PHYSIQUES - MANIABILITE DES GRAVES-CIMENT - INCIDENCE DE LA NATURE MINERALOGIQUE DU GRANULAT

Workability studies conducted during the strengthening of the RN 807-808 in Saint-Hilaire-du-Harcquet have shown the importance of the mineralogical nature of the materials used as regards workability and application behaviour. The strengthening operations, for which gravel-cement was used for the shoulders and roadbases, were conducted over two departments. For the first section, the aggregates used were Brioverian spotted shale. For the second sections, they were fine white quartzites. The problems were very different for each site since for the one with the spotted shale, even with 4% retarder the minimum time of 24 H recommended for strengthening under traffic was never reached and the gravel was rather difficult to compact. For the other (quartzite), the whole operations were carried out without having to add a retarder and the gravel was very easy to apply. These differences in workability are due to the mineralogical nature of the aggregates used. (TRRL)

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Evrard, H
    • Lebas, M
  • Publication Date: 1978-3-4

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00303029
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jan 30 1980 12:00AM