Solid sodium metasilicate synthesized from brewery waste for the activation of one-part alkali-activated material
DOI:
https://doi.org/10.46421/enarc.v9i1.7383Keywords:
Sodium metasilicate, Alkali activation, Alkali-activated materials, WasteAbstract
The alkali activation of silica- and alumina-rich precursors has been extensively studied as a sustainable alternative to Portland cement. This study investigates the use of a Solid Sodium Metasilicate Synthesized from Residues (MSSR) as a solid activator for producing one-part alkali-activated materials (AAMs). The MSSR was obtained from an industrial silica-rich waste and applied in AAM formulations using metakaolin and ground granulated blast furnace slag as precursors. Mechanical tests showed compressive strength close to 90 MPa at 28 days, with evidence of a dense microstructure favorable to the development of typical reaction products of alkali-activated systems. Compared to commercial liquid activators, MSSR offers technical advantages such as improved storage stability, easier handling, and a lower carbon footprint. The results indicate that MSSR can replace conventional activators, promoting more sustainable solutions for the construction industry.
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