Abstract
The effect of Nano-Al2O3 on the mechanical properties of alkali activated Granulated Blast Furnace Slag (GBFS) materials was studied. The results showed that the addition of Nano-Al2O3 can significantly increased the 28-day compressive strength. The compressive strength of the control slurry without GBFS just increased from 7.4 MPa to 8.5 MPa (14.86% increase) from 2 d to 28 d curing time, while as the addition dosage of Nano-Al2O3 increased from 1% to 5%, the compressive strength increase varied from 39.62% to 71.90% after 28d curing period. X-Ray Diffraction (XRD)-Retvieled combined with TG analysis showed that adding Nano-Al2O3 increased the amorphous phase, which may be the main cause of increasing of compressive strength.
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