Assessment and Repair of Fire-Damaged High Strength Concrete: Strength and Durability

Fire-damaged concrete structures' service life and safety are influenced by two key factors, durability and strength. The authors studied aggregate type and concrete strength effects on high-strength concrete (HSC) postfire residual compressive strength in order to develop post-fire repair assessment for fire-damaged HSC structure methodology. Scanning electron microscopy observation, mercury intrusion porosimetry tests, and the rapid chloride-ion penetrability tests were used to investigate microstructure and durability changes. Scanning electron microscopy observation, mercury intrusion porosimetry and dichotomy tests establish the fire-damaged concrete element temperature distribution estimation. The "two-level" method can be used to assess postfire durability and the strip method can be used to assess postfire residual compressive strength according to the estimated temperature distribution. Recommendations for fire-damaged HSC structure repair methodology is given in steps based on assessments.

  • Availability:
  • Authors:
    • Yan, Xin
    • Li, Hui
    • Wong, Yuk-Lung
  • Publication Date: 2007-6

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01051731
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 8 2007 10:50AM