Alkali-Activated Mine Tailings and Solid Wastes as Precursors for Geopolymers

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dc.contributor.authorSamarina, Tatiana
dc.contributor.authorReyes, Arturo
dc.contributor.authorLetelier, María Victoria
dc.contributor.authorCastillo Godoy, Daniza
dc.contributor.authorSilva Urrego, Yimmy
dc.contributor.authorCuevas, Jacqueline
dc.contributor.authorTakaluoma, Esther
dc.date.accessioned2026-03-17T15:51:30Z
dc.date.available2026-03-17T15:51:30Z
dc.date.issued2024
dc.description.abstractFormer mining activities may pose a threat to the environment if not being handled correctly due to neglecting proper conservation methods at the time of mine closure. While dumping is the most common way of disposing of solid industrial waste such as tailings, fly and bottom ashes, slags etc., those materials are in fact a valuable source of secondary raw minerals. Thus, they could be recycled in a variety of products to turn the waste streams into value via the promising geopolymerisation technology. This article presents a study on the conversion of mine tailings and industrial by-products into geopolymers. Geopolymers based on alumino-silicate fines (steel-making slags and mine tailings) were synthesized using alkaline activation comprising sodium silicate. While the hardening of compositions occurs slowly at ambient temperature, elevated temperatures could change the leaching behaviour and decrease copper release from geopolymer matrix. Compressive strength of the proposed composition was 49±2 MPa after 90 days of curing. The results provide insights of possible reduction of the environmental footprints and potential economic benefits of mine tailings-based geopolymer composites for building applications utilizing mine tailings as suitable concrete material.
dc.description.sponsorshipFONDEF/ANID 2021 + ID21I10322 MINEDUC-UA ANT 1999
dc.identifier.doi10.11159/icceia24.161
dc.identifier.issn2369-8128
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/666
dc.language.isoen
dc.publisherAvestia
dc.sourceProceedings of the World Congress on New Technologies
dc.subjectgeopolymers
dc.subjectalkaline activation
dc.subjectmine tailings
dc.subjectindustrial by-products
dc.subjectside product valorisation
dc.titleAlkali-Activated Mine Tailings and Solid Wastes as Precursors for Geopolymers
dc.typeArticle
organization.identifier.rorhttps://ror.org/04eyc6d95
organization.legalNameUniversidad de Antofagasta
uantof.identificator.departmentDepartamento de Ingeniería en Minas
uantof.identificator.facultyFacultad de Ingeniería
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