COMPARATIVE STUDY OF AUTOGENOUS HEALING OF DIFFERENT CONCRETES

The autogenous healing property of concrete is important since it reflects the measure to which a damaged concrete may recover its normal load bearing ability. In this report the effects of age, environment, cement, aggregate and mix proportions on the autogenous healing of concrete materials are discussed. The degree of fracturing was accurately controlled by loading specimens to maximum stress using a constant strain rate method of loading. The extent of healing was evaluated by comparing healed strengths with "fresh" and fractured strength values. Full strength recovery in a moist environment is possible at all ages with concretes containing varying quantities of cement, although optimum healing results are obtained for richer mixes and concrete fractured at early ages. The magnitude of recovery is related to hydration characteristics of cement and curing temperature was found to accentuate the effect of cement. The post-failure environment was found to be more important to healing than the initial curing. Aggregate has no significant effect. Results suggest that the autogenous healing phenomenon can be effectively applied to recover the strength of damaged structural members. (a). The number of the covering abstract of the conference is IRRD abstract no. 213776. /TRRL/

  • Supplemental Notes:
    • Presented at the First Australian Conference on Engineering Materials.
  • Corporate Authors:

    University of New South Wales

    School of Civil Engineering, Anzac Parade
    Kensington, New South Wales  Australia  2033
  • Authors:
    • MUNDAY, JGL
    • SANGHA, C M
    • Dhir, R K
  • Publication Date: 0

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 13 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00129548
  • 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