EFFECT OF HIGH TEMPERATURE AND COOLING REGIMES ON THE COMPRESSIVE STRENGTH AND PORE PROPERTIES OF HIGH PERFORMANCE CONCRETE

This paper describes the behavior of high performance concrete (H compared with normal strength concrete (NSC), after subject to different high temperatures (800 and 1100 degrees C) and cooling regimes (gradual and rapid cooling). Deterioration of compressiv strength of the concrete was measured. The results obtained show that the strength of both the HPC and NSC reduced sharply after t exposure to high temperatures. Thermal shock due to rapid coolin caused a bit more deterioration in strength than in the case of gradual cooling without thermal shock. However, thermal shock di not significantly increase the spalling of HPC. Mercury intrusio porosimetry (MIP) tests were carried out to measure changes in th pore size distribution in the concrete. Test results showed that pore volume in the HPC increased much more than that in the NSC. significant change in the cumulative pore volume was observed and difference in cumulative pore volume between the two cooling regi was less after subject to the peak temperature of 1100 degrees C compared with that of 800 degrees C peak temperature. (A)

  • Availability:
  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Chan, SYN
    • Luo, Xue
    • Sun, W
  • Publication Date: 2000

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00799715
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD,
  • Created Date: Oct 6 2001 12:00AM