Alkali-activated metakaolin-slag blends—performance and structure in dependence of their composition |
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Authors: | A Buchwald H Hilbig Ch Kaps |
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Affiliation: | (1) Bauhaus-University Weimar, Weimar, Germany;(2) Centre of building materials (cbm), Technical University Munich, Munich, Germany |
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Abstract: | Blast furnace slag and metakaolin were blended together and the combination activated by sodium hydroxide solution. The boundary
mixtures were set by the activation of the pure slag and pure metakaolin powders. The type and quantity of the reaction products
in the alkaline activated blended binders was determined. It is discussed whether both raw materials react separately and
are unaffected by each other or if there is a chemical interaction. The discussion bases on extensive investigations with
29Si and 27Al nuclear magnetic resonance spectroscopy compared with X-ray diffraction and thermal analysis (DTA/TG). Additionally, the
strength performance will be presented and related to structure, composition and the amount of the reaction products. |
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Keywords: | |
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