FRACTURE OF BARE CONCRETE UNDER GAS-INDUCED AXISYMMETRIC COMPRESSION. FRACTURE OF CONCRETE AND ROCK: RECENT DEVELOPMENTS. PAPERS PRESENTED AT THE INTERNATIONAL CONFERENCE, UNIVERSITY OF WALES, COLLEGE OF CARDIFF, SCHOOL OF ENGINEERING, SEPTEMBER 20-22, 1989

Application of nitrogen gas pressure axisymmetrically to a bare concrete cylinder causes a tensile cleavage fracture. Test results show that the presence of water in the concrete significantly affects the apparent strength as well as the permeability to gas. It is shown that in wet cylinders gas pressure is not easily transmitted through the pore system and that water absorbed into the outer surface of a dry cylinder acts as a barrier to gas penetration causing an apparent increase in the axisymmetric compression/tension strength. It is concluded that the test is a useful check on tensile strength which responds sensitively to internal changes in the concrete and that in wet solid cylinders of 100 mm diameter the indicated gauge pressure is significantly higher than the average internal pore pressure and probably accounts for most of the apparent increase in strength.(A) For the covering abstract of the conference see IRRD 829348.

  • Availability:
  • Corporate Authors:

    Elsevier Science Publishers

    Crown House, Linton Road
    Barking, Essex IG11 8JU,   England 
  • Authors:
    • Lydon, F D
    • Mahawish, A H
  • Publication Date: 1989

Language

  • English

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Filing Info

  • Accession Number: 00605955
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 1-85166-414-9
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM