The effect of high temperature curing on the strength and carbonation of pozzolanic structural lightweight concretes

T. Y. Lo, A. Nadeem, W. C.P. Tang, P. C. Yu

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

An experimental study on the compressive strength and carbonation depth of lightweight concrete mixes that contain pulverized fuel ash (PFA) and silica fume (SF) as cement replacements is presented in this paper. Mixes that had a relatively high replacement level of PFA at 25, 40, and 55% and of SF at 5, 10, and 15% by weight were compared. The results indicated that accelerated curing at 60 °C for 3 days improved the 28-day compressive strength of the PFA- and SF-incorporated mixes but resulted in higher carbonation of the mixes compared with that under normal temperature curing. Mixes that had 25% PFA or 5-10% SF as partial cement replacements had slightly higher strength under accelerated curing and slightly lower strength under normal curing than the control mix. At higher replacement levels of PFA and SF, further lower strength and higher carbonation was observed.

Original languageEnglish
Pages (from-to)1306-1310
Number of pages5
JournalConstruction and Building Materials
Volume23
Issue number3
DOIs
Publication statusPublished - Mar 1 2009
Externally publishedYes

Keywords

  • Carbonation
  • Fly ash
  • High temperature curing
  • Lightweight concrete
  • Silica fume

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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