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THE BEHAVIOUR OF HYDRAULIC CONCRETE: LIABILITY TO CRACKING AND EMBRITTLEMENT. A CRITICAL AND BIBLIOGRAPHICAL STUDY

COMPORTEMENT DU BETON HYDRAULIQUE: FISSURABILITE ET FRAGILITE. ETUDE BIBLIOGRAPHIQUE ET CRITIQUE

Hydraulic concrete can become a material of the future if it is diversified. The two principal difficulties to be solved are liabiilty to cracking and embrittlement, and they can only be solved by a multidisciplinary approach. A distinction is made between the iritiation of cracking and the propagation of cracks. The propagation of cracks comes under the heading of the mechanics of failure, and its application to concrete structures is essential. Depsite research carried out over the past fifteen years, many difficulties have still not been resolved, and some results may be vitiated by serious errors. The author focusses attention on precautions to be taken in continuing research which seems promising (the use of fibres). The problem of the initiation of cracking seems to be linked with that of the cracking of structures in the absence of external mechanical stresses and under the effect of physical and chemical causes. Currently prejudicial cracks damage structures while the concrete is still young, and hence at the time when it is easiest to modify the behaviour of the material. For this reason it seams possible that the same research can in the short term make it possible to reduce the risks of prejudicial cracking and in the long term simplify procedural methods. Two examples are given: 1) Cracking of fresh concrete (present risk) and cement paste of low porosity (future advances to be provided for). 2) Early cracking connected with the hydration of the cement (present risk) and prestressing by chemical expansion (a line to be developed in the future). The study is backed by 91 bibliographical references. /Author/

  • Corporate Authors:

    Central Laboratory of Bridges & Highways, France

    75732 Paris,   France 
  • Authors:
    • Baron, J
  • Publication Date: 1977-10

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 64 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00167837
  • Record Type: Publication
  • Report/Paper Numbers: LCPC No. 69
  • Files: TRIS
  • Created Date: Mar 7 1978 12:00AM