THE RESIDUAL STRENGTH OF CONCRETE SUBJECTED TO ELEVATED TEMPERATURES

Tests described in this paper were carried out to investigate the effect of high temperatures on the residual compressive strength of concrete used in Mauritius. The effect of method of cooling and that of age after heating were included in the investigation. X-ray diffraction tests on coral sand and basalt were carried out to see whether any chemical/physical changes occur in them on heating. The following conclusions were drawn from the tests carried out on concrete cubes: (a) when subjected to high temperatures the residual strength of concrete made with coral sand is significantly less than that of concrete made with basalt sand. This appears to be due to some chemical/physical changes which occur in the coral sand when heated beyond 300 deg C. (b) the method of cooling has no significant influence on the residual strength of concrete heated up to 400 deg C, but for higher temperatures air-cooled specimens have a lower residual strength than water-cooled ones. (C) air-cooled specimens show a further loss in strength from one day to seven days after heating. Water-cooled specimens, however, exhibit a recovery in strength over the same period. (D) ultrasonic pulse velocity measurements generally predict the residual compressive strength of heated concrete reasonably well, the accuracy of prediction being of the order of plus or minus 20 per cent. (TRRL)

  • Availability:
  • Corporate Authors:

    Plenum Publishing Corporation

    233 Spring Street
    New York, NY  United States  10013
  • Authors:
    • Mohamedbhai, GTG
  • Publication Date: 1983-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 22-27
  • Serial:
    • CONCRETE
    • Volume: 17
    • Issue Number: 12
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00382109
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Apr 30 1984 12:00AM