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Kubátová, Dana
Research Institute for Building Materials (Czechia)
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article
Utilization of flue dust arising from metakaolin production for alkali-activated materials preparation
Abstract
<jats:title>Abstract</jats:title><jats:p>This paper assesses the feasibility of using flue dust, which is a residue from metakaolin manufacturing in a rotary kiln as a raw material for production of alkali-activated materials. This material contains besides metakaolin also residues of clays, and mullite. Metakaolin and blast furnace slag were used as initial materials. Flue dust was used for the replacement of initial materials up to 100%. Mortars were prepared for the determination of compressive strength by adding sand at the weight ratio of 1:1. As an alkaline activator was used potassium water glass and s/w ratio was 1.25. The prepared samples were tested for physical-mechanical properties after 28, 56, 90 and 180 days. Setting time and leaching characteristic were also evaluated.</jats:p>