Hydration kinetics and mechanical performance of cement pastes with copper slag as supplementary cementitious material

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dc.catalogadordfo
dc.contributor.authorBurbano García, Claudia Patricia
dc.contributor.authorSilva Urrego, Yimmy Fernando
dc.contributor.authorAraya Letelier, Gerardo Andrés
dc.contributor.authorGonzález Hormazabal, Marcelo Andrés
dc.date.accessioned2025-08-27T19:43:55Z
dc.date.available2025-08-27T19:43:55Z
dc.date.issued2025
dc.description.abstractThe growing global demand for concrete infrastructure and cement highlights the need to mitigate the environmental impact of cement production. Incorporating alternative supplementary cementitious materials (SCMs) has emerged as a promising strategy. This research investigates the effect of copper slag (CS), a significant global mining-sector waste, as SCM in cement pastes, focusing on hydration and mechanical performance in both the short and long term. CS was used as SCM at dosages of 0 %, 10 %, 20 %, 30 %, and 50 % by volume. The hydration evolution of cement paste mixtures was evaluated using isothermal calorimetry, compressive strength tests, X-ray diffraction (XRD), differential thermogravimetry (DTG), and field emission scanning electron microscopy. Results indicate that up to 20 % CS replacement did not negatively affect compressive strength in the long term, while dosages above 20 % led to a monotonic reduction. XRD and DTG analyses validated the pozzolanic effect of CS, evidenced by the formation of new Fe-siliceous hydrogarnet phases and a reduction in CH content at later ages. Additionally, a predictive model combining random forest and polynomial regression techniques was developed to accurately forecast compressive strength as a function of CS dosage and curing time. This study concludes that incorporating up to 20 % CS as SCM can reduce CO2 emissions associated with the clinker factor without significantly compromising long-term mechanical performance, and offers a viable alternative for greener cement production.
dc.fechaingreso.objetodigital2025-08-27
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.jobe.2025.113673
dc.identifier.urihttps://doi.org/10.1016/j.jobe.2025.113673
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/105319
dc.information.autorucEscuela de Ingeniería ; Burbano García Claudia Patricia ; 1102618 ; N/A
dc.information.autorucEscuela de Construcción Civil ; Silva Urrego Yimmy Fernando ; 1197383 ; 0000-0003-3888-457X
dc.information.autorucEscuela de Construcción Civil ; Araya Letelier Gerardo Andrés ; 124980 ; 0000-0003-4252-1341
dc.information.autorucEscuela de Ingeniería ; González Hormazabal Marcelo Andrés ; 143922 ; N/A
dc.issue.numero15
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaJournal of Building Engineering
dc.rightsacceso restringido
dc.subjectCopper slag
dc.subjectCement paste
dc.subjectCompressive strength modelling
dc.subjectFiller effect
dc.subjectPozzolanic activity
dc.subjectHydration
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods12 Responsible consumption and production
dc.subject.odspa12 Producción y consumo responsable
dc.titleHydration kinetics and mechanical performance of cement pastes with copper slag as supplementary cementitious material
dc.typeartículo
dc.volumen112
sipa.codpersvinculados1102618
sipa.codpersvinculados1197383
sipa.codpersvinculados124980
sipa.codpersvinculados143922
sipa.trazabilidadORCID; 2025-08-22
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