Impact of mixture design and production parameters on the crushing strength of cold-bonded alkali activated aggregates made from iron tailings

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dc.article.number144940
dc.catalogadorvzp
dc.contributor.authorLoyola Fernández, Estefanía Francisca
dc.contributor.authorEugenin Soto, Claudia
dc.contributor.authorVargas, Felipe
dc.contributor.authorVidela Leiva, Álvaro Rodrigo
dc.contributor.authorNavarrete Leschot, Iván Ignacio
dc.date.accessioned2025-12-30T13:08:39Z
dc.date.available2025-12-30T13:08:39Z
dc.date.issued2026
dc.description.abstractThis study explores the production and performance of cold-bonded alkali-activated artificial aggregates (CB- AAA) made from highly crystalline iron tailings, a low-reactivity mining by-product. A factorial experimental design was used to assess the influence of five key parameters on crushing strength: aggregate particle size, alkaline activator molarity, co-activator dosage, curing temperature, and curing time. The resulting aggregates exhibited bulk densities from 824 to 1002 kg/m³ , water absorption between 14.78 % and 25.68 %, and crushing strengths ranging from 0.18 to 3.24 MPa. A second-order polynomial regression model was developed and validated, identifying curing temperature as the most significant factor. To evaluate structural applicability, concrete specimens were prepared with 30 % and 100 % replacement of natural coarse aggregates. Higher- quality CB-AAA mitigated compressive strength losses, with partial replacement mixtures retaining up to 60 % of the reference strength. These results demonstrate the feasibility of using iron tailings in low-carbon construction materials despite the low reactivity of these waste materials, and they offer new insights into the role of mixture design and processing conditions in optimizing the performance of CB-AAA for concrete applications.
dc.format.extent12 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.conbuildmat.2025.144940
dc.identifier.eissn1879-0526
dc.identifier.issn0950-0618
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2025.144940
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/107502
dc.information.autorucEscuela de Ingeniería; Loyola Fernández, Estefanía Francisca; S/I; 236319
dc.information.autorucEscuela de Ingeniería; Eugenin Soto, Claudia Andrea; S/I; 223113
dc.information.autorucEscuela de Ingeniería; Videla Leiva, Álvaro Rodrigo; 0000-0002-6785-5818; 10225
dc.information.autorucEscuela de Ingeniería; Navarrete Leschot, Iván Ignacio; S/I; 185578
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaConstruction and Building Materials
dc.rightsacceso restringido
dc.subjectAlkali-activated materials
dc.subjectIron mine tailings
dc.subjectFactorial experimental design
dc.subjectConcrete
dc.subject.ddc620
dc.subject.ods12 Responsible consumption and production
dc.subject.odspa12 Producción y consumo responsables
dc.titleImpact of mixture design and production parameters on the crushing strength of cold-bonded alkali activated aggregates made from iron tailings
dc.typeartículo
dc.volumen506
sipa.codpersvinculados236319
sipa.codpersvinculados223113
sipa.codpersvinculados10225
sipa.codpersvinculados185578
sipa.trazabilidadORCID;2025-12-22
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