Valorization of Recycled Aggregate and Copper Slag for Sustainable Concrete Mixtures: Mechanical, Physical, and Environmental Performance

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dc.article.number11239
dc.catalogadorgjm
dc.contributor.authorCaballero Arredondo, Pamela Wendy
dc.contributor.authorSilva Urrego, Yimmy Fernando
dc.contributor.authorAraya Letelier, Gerardo Andrés
dc.contributor.authorHernández López, Héctor Enrique
dc.date.accessioned2025-03-24T16:13:52Z
dc.date.available2025-03-24T16:13:52Z
dc.date.issued2024
dc.description.abstractThe increasing environmental impacts caused by the high demand for concrete production have underscored the need for sustainable alternatives in the design of eco-concrete mixtures. Additionally, important industries, such as construction and mining, generate massive amounts of waste/by-products that could be repurposed towards sustainability. Consequently, this study investigates the valorization of copper slag (CS), a by-product of the mining industry as a supplementary cementitious material (SCM), and concrete as recycled coarse aggregate (RCA), derived from construction and demolition waste, as partial substitutes for Ordinary Portland Cement (OPC) and natural coarse aggregate (NCA), respectively. Eco-concrete mixtures were designed with varying replacement levels: 15% for CS, and 0%, 20%, 50%, and 100% for RCA. The mechanical properties (compressive, indirect tensile, and flexural strengths), permeability characteristics (porosity and capillary suction), and environmental impacts (carbon footprint) of these mixtures were evaluated. The results showed that the use of CS and of increasing proportions of RCA led to a monotonic loss in each of the concretes' mechanical strength properties at 7, 28 and 90 days of curing. However, at extended ages (180 days of curing), the concrete mixtures with CS and only NCA presented an average compressive strength 1.2% higher than that of the reference concrete (mixture with only OPC and natural aggregate). Additionally, the concrete mixture with CS and 20% RCA achieved 3.2% and 5.8% higher average values than the reference concrete in terms of its indirect tensile strength and flexural strength, respectively. Finally, a cradle-to-gate life cycle assessment (LCA) analysis was implemented, whose results showed that the greatest effect on reducing the carbon emission impacts occurred due to the substitution of OPC with CS, which confirmed that the adequate technical performances of some of the concrete mixtures developed in this study are positively complemented with reduced environmental impacts. Moreover, this study presents a viable approach to minimizing resource consumption and waste generation, contributing to the advancement of eco-friendly construction materials, which aligns with the sustainable development goals.
dc.description.funderFondecyt de Iniciacion
dc.fechaingreso.objetodigital2025-03-24
dc.format.extent21 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3390/su162411239
dc.identifier.eissn2071-1050
dc.identifier.urihttps://doi.org/10.3390/su162411239
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/102958
dc.identifier.wosidWOS:001387222100001
dc.information.autorucEscuela de Construcción Civil; Silva Urrego, Yimmy Fernando; 0000-0003-3888-457X; 1197383
dc.information.autorucEscuela de Construcción Civil; Araya Letelier, Gerardo Andrés; 0000-0003-4252-1341; 124980
dc.information.autorucEscuela de Construcción Civil; Hernández López, Héctor Enrique; 0000-0003-4031-4023; 130974
dc.issue.numero24
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaSustainability
dc.rightsacceso abierto
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectEco-concrete
dc.subjectWaste valorization
dc.subjectCopper slag
dc.subjectRecycled coarse aggregate
dc.subjectEnvironmental impacts
dc.subject.ddc600
dc.subject.deweyTecnologíaes_ES
dc.subject.ods10 Reduced inequalities
dc.subject.odspa10 Reducción de las desigualdades
dc.titleValorization of Recycled Aggregate and Copper Slag for Sustainable Concrete Mixtures: Mechanical, Physical, and Environmental Performance
dc.typeartículo
dc.volumen16
sipa.codpersvinculados1197383
sipa.codpersvinculados124980
sipa.codpersvinculados130974
sipa.trazabilidadWOS;2025-01-11
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