Reaction Models for Alkali-Activated Slags

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Title: Reaction Models for Alkali-Activated Slags

Author(s): H. J. H. Brouwers and W. Chen

Publication: Special Publication

Volume: 221

Issue:

Appears on pages(s): 303-318

Keywords: alkali-activated; hydration product; model; reaction; slag

Date: 5/1/2004

Abstract:
This paper addresses the reaction of alkali activated slags (AAS). First, from literature the most abundant hydration products formed from the hydration of slags are summarized. These products include C-S-H, a hydrotalcite-like phase, a hydrogarnet phase, AFm phases (C4AH13 and CzASHs) and ettringite. Then, two reaction models are established which correlate the mineral composition of the slag (the glass part) with hydration products. Using the proposed models, quantities of hydration products and composition of C-S-H formed can be determined. Finally, the models are applied to four slags selected from literature, and conclusions are drawn.