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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Detail(s)

Original languageEnglish
Pages (from-to)1306-1310
Journal / PublicationConstruction and Building Materials
Volume23
Issue number3
Publication statusPublished - Mar 2009

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. © 2008 Elsevier Ltd. All rights reserved.

Research Area(s)

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

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