CONCRETE PAVEMENTS - CEMENT FOR ROAD CONSTRUCTION CONCRETE - RESEARCH ON OPTIMUM STANDARDS

CHAUSSEES EN BETON - LES CIMENTS POUR BETONS ROUTIERS -RECHERCHE DES SPECIFICATIONS OPTIMALES

The results are given of the study carried out to draft new standards following the establishment of the new specification p15301 for cements, which envisages lower and higher 28-day strength limits. Those results show that: from the strength point of view, (1) artificial portland cement 450 will have to be used in pavement concrete; (2) the evolution in strength after 28 days is an important criterion; (3) the nature and quality of admixtures condition strength evolution; (4) strength varies little between 300 and 360 kg of cement per cubic meter of concrete; (5) it is not necessary to lower the specified strength for secondary roads. From the point of view of cracking: (1) the maximum rate of secondary shrinkage is a satisfactory criterion for evaluating the risk of crack formation linked to hydration shrinkage. From the point of view of wear: (1) portland cement, class 450, should give a type of concrete not more prone to wear than present concrete; (2) 550 artificial portland cements are interesting from the point of view of strength and wear, but they must fulfil secondary shrinkage conditions from the point of view of cracking. /TRRL/

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Ray, M
    • Lesage, R
    • Baron, J
    • Paillere, A M
    • Nissoux, J L
    • Guinez, R
  • Publication Date: 1977-11-12

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00195634
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1979 12:00AM