Abstract
This study is a part of an on-going research studying the effect of blast furnace slag as a binder and filler replacement on the properties of fresh and hardened foam concrete. A mix having the density of 1300kg/m3 with a proportion of (1 cement:2 sand), W/C ratio of 0.45, a commercially available additive (SP-1), class F fly ash and a unprocessed blast furnace slag was used. The results show that the mix containing the slag achieved a higher compressive strength (6.31MPa at 28 days) than that of the control mix at the same age (5.81MPa). In addition, combining both slag and fly ash as a cement replacement further enhanced the compressive strength achieving higher compressive strengths. Also, a more stable mix was achieved by the slag replacement when compared to the control mix. This result concludes that the unprocessed slag is a good pozzolanic material that can be used with foam concrete.
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