BEHAVIOUR OF HARDENED CEMENT PASTE AND CONCRETE UNDER SUSTAINED LOAD

A theory of crack propagation in porous viscoelastic materials is briefly described. The basic assumptions of the theory are compared with electron micrographs taken from fracture surfaces. The influence of high sustained load on the strength of hardened cement paste and concrete has been experimentally determined. Results are in good agreement with theoretical predictions. It is shown that a sustained tensile stress increases the tensile strength if it does not exceed a certain level. This influence of a sustained tensile stress has been studied as a function of duration of load, of the age of the specimens, and of the height of the load. The origin of this strengthening effect is discussed. (A) See also IRRD Abstract No. 205029

  • Supplemental Notes:
    • Proceedings of the Society of Materials Science Conference on the Mechanical Behavior of Materials.
  • Corporate Authors:

    Society of Materials Science

    1 Yoshida Izumidono-cho, Sakyo-Ku
    Kyoto 600,   Japan 

    Society of Materials Science

    1 Yoshida Izumidono-cho, Sakyo-Ku
    Kyoto 600,   Japan 

    Society of Materials Science

    1 Yoshida Izumidono-cho, Sakyo-Ku
    Kyoto 600,   Japan 
  • Authors:
    • Wittmann, F H
    • Zaitsev, J
  • Conference:
  • Publication Date: 1972

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 84-95

Subject/Index Terms

Filing Info

  • Accession Number: 00083871
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: May 29 1975 12:00AM