Performance of metakaolin concrete at elevated temperatures

Chi Sun Poon, Salman Azhar, Mike Anson, Yuk Lung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

153 Citations (Scopus)

Abstract

An experimental investigation was conducted to evaluate the performance of metakaolin (MK) concrete at elevated temperatures up to 800 °C. Eight normal and high strength concrete (HSC) mixes incorporating 0%, 5%, 10% and 20% MK were prepared. The residual compressive strength, chloride-ion penetration, porosity and average pore sizes were measured and compared with silica fume (SF), fly ash (FA) and pure ordinary Portland cement (OPC) concretes. It was found that after an increase in compressive strength at 200 °C, the MK concrete suffered a more severe loss of compressive strength and permeability-related durability than the corresponding SF, FA and OPC concretes at higher temperatures. Explosive spalling was observed in both normal and high strength MK concretes and the frequency increased with higher MK contents.
Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalCement and Concrete Composites
Volume25
Issue number1
DOIs
Publication statusPublished - 1 Jan 2003

Keywords

  • Durability
  • Fire resistance
  • Fly ash
  • High strength concrete
  • Metakaolin
  • Micro-structure
  • Permeability
  • Silica fume
  • Spalling

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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