TY - JOUR
T1 - The effect of high temperature curing on the strength and carbonation of pozzolanic structural lightweight concretes
AU - Lo, T. Y.
AU - Nadeem, A.
AU - Tang, W. C.P.
AU - Yu, P. C.
N1 - Funding Information:
The work described in this paper was supported by a grant from the City University of Hong Kong [Project No. 7001832].
PY - 2009/3
Y1 - 2009/3
N2 - 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.
AB - 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.
KW - Carbonation
KW - Fly ash
KW - High temperature curing
KW - Lightweight concrete
KW - Silica fume
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U2 - 10.1016/j.conbuildmat.2008.07.026
DO - 10.1016/j.conbuildmat.2008.07.026
M3 - Article
AN - SCOPUS:57749208379
SN - 0950-0618
VL - 23
SP - 1306
EP - 1310
JO - Construction and Building Materials
JF - Construction and Building Materials
IS - 3
ER -