SOME FLEXURAL FATIGUE PROPERTIES OF CONCRETE-EFFECTS OF AGE AND METHODS OF CURING

In an investigation into the effects of different methods of curing, the flexural strength and fatigue performance of a typical pavement quality concrete were determined from tests on small beams which had first aged for 6 months under various combinations of air curing and immersion in water. The highest flexural strengths and longest fatigue lives were achieved on beams which were over-dried after prolonged immersion. The lowest strengths, about one half of the highest values, occurred on similar beams which were allowed to dry out in the laboratory after immersion. For water-cured specimens only, the effect of immersion times of up to 5 years was studied in flexural strength and fatigue tests on three different types of concrete. Improvements in fatigue performance with age followed closely increases in modulus of rupture, the rate of increase in strength with time being somewhat greater for a lean concrete mix than for the two pavement quality mixes. In general, flexural fatigue strength for different types of concrete under various conditions of curing and over a wide range of ages appears to be related directly to the modulus of rupture measured in quasi-static tests under the same conditions. /TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 211-229

Subject/Index Terms

Filing Info

  • Accession Number: 00127234
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: May 14 1976 12:00AM