Pore size distribution of high performance metakaolin concrete

Chi Sun Poon, S. C. Kou, L. Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

The Compressive strength, porosity and pore size distribution of high performance metakaolin (MK) concrete were investigated. Concretes containing 0, 5%, 10% and 20% metakaolin were prepared at a water/cementitious material ratio (W/C) of 0.30. In parallel, concrete mixtures with the replacement of cement by 20% fly ash or 5 and 10% silica fume were prepared for comparison. The specimens were cured in water at 27°C for 3 to 90 days. The results show that at the early age of curing (3 days and 7 days), metakaolin replacements increase the compressive strength, but silica fume replacement slightly reduces the compressive strength. At the age of and after 28 days, the compressive strength of the concrete with metakaolin and silica fume replacement increases. A strong reduction in the total porosity and average pore diameter were observed in the concrete with MK 20% and 10% in the first 7 days.
Original languageEnglish
Pages (from-to)42-46
Number of pages5
JournalJournal Wuhan University of Technology, Materials Science Edition
Volume17
Issue number1
DOIs
Publication statusPublished - 1 Jan 2002

Keywords

  • High performance concrete
  • Metakaolin
  • Pore size distribution

ASJC Scopus subject areas

  • Materials Science(all)

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