2026-09-20T16:46:17Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/61742023-03-01T11:00:46Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

Revilla Cuesta, Víctor Skaf Revenga, Marta Santamaría, Amaia Hernández Bagaces, Jorge J. Ortega López, Vanesa 2021-11-18T12:09:47Z 2021-11-18T12:09:47Z 2021-05 0959-6526 http://hdl.handle.net/10259/6174 10.1016/j.jclepro.2021.126890 The addition of by-products, such as recycled concrete aggregate and ground granulated blast furnace slag, modify the in-fresh flowability of ordinary self-compacting concrete both initially and over time. A detailed study is presented in this paper of 18 mixtures (SF3 slump-flow class) containing 100% coarse recycled concrete aggregate, two types of cement (CEM I or CEM III/A, the latter with 45% ground granulated blast furnace slag), different contents of fine recycled concrete aggregate (0, 50, or 100%), and three different aggregate powders (ultra-fine limestone powder <0.063 mm, limestone fines 0/0.5 mm, and recycled concrete aggregate 0/0.5 mm). The temporal evolution of slump flow, viscosity, and passing ability, and the values of segregation resistance, air content, fresh and hardened density, and compressive strength were evaluated in all the mixtures. The addition of fine recycled concrete aggregate and CEM III/A improved initial slump flow and passing ability by 6%, due to their higher proportion of fines. Nevertheless, the temporal loss of flowability within 60 min was 5.8% lower when adding natural aggregate and CEM I. Viscosity and air content increased 26% on average following additions of fine recycled concrete aggregate, unlike with additions of ground granulated blast furnace slag. Flowability and strength increased with the addition of limestone fines 0/0.5 mm. According to multi-criteria analyses, the mixtures with CEM III/A, 50% fine recycled concrete aggregate, and limestone fines 0/0.5 mm showed an optimal balance between their flowability (SF2 slump-flow class 60 min after the mixing process), compressive strengths (around 60 MPa), and carbon footprints. Spanish Ministry MCIU, AEI and ERDF [grant numbers FPU17/03374 and RTI 2018-097079-B-C31]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231, BU119P17]; the Youth Employment Initiative (JCyL) and ESF [grant number UBU05B_1274]; the University of Burgos [grant number SUCONS, Y135. GI], UPV/EHU (PPGA20/26) and, finally, our thanks also to the Basque Government research group IT1314-19. eng Elsevier Journal of Cleaner Production. 2021, V. 299, 126890 https://doi.org/10.1016/j.jclepro.2021.126890 info:eu-repo/grantAgreement/MICIU/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPU17%2F03374 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097079-B-C31/ES/DESARROLLO SOSTENIBLE DE MEZCLAS HIDRAULICAS, A PARTIR DE ESCORIAS DE ACERIA, PARA UNA EDIFICACION MAS ADAPTADA AL CAMBIO CLIMATICO. DISEÑOS A RESISTENCIAS MEDIAS info:eu-repo/grantAgreement/Junta de Castilla y León//BU119P17//Innovación Competitiva en la Utilización de Escorias Siderúrgicas para la elaboración de Hormigones de Altas Prestaciones. Aplicaciones en la Industrialización info:eu-repo/grantAgreement/Junta de Castilla y León//UBU05B_1274 info:eu-repo/grantAgreement/UBU//Y135.GI info:eu-repo/grantAgreement/UPV%2FEHU//PPGA20%2F26 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Self-compacting concrete Recycled concrete aggregate Ground granulated blast furnace slag Flowability, viscosity and passing ability evolution Sieve segregation Air content Materiales de construcción Ingeniería civil Building materials Civil engineering Temporal flowability evolution of slag-based self-compacting concrete with recycled concrete aggregate info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion