RT info:eu-repo/semantics/article
T1 Full-scale sustainable structural concrete containing high proportions of by-products and waste
A1 Santamaría, Amaia
A1 Revilla Cuesta, Víctor
A1 Skaf Revenga, Marta
A1 Romera, Jesús María
K1 Electric arc furnace slag
K1 Ground granulated black furnace slag
K1 Ladle furnace slag
K1 Quarry tailings
K1 Recycled concrete aggregate
K1 Sustainable concrete
K1 Fresh properties
K1 Shrinkage
K1 Water penetration
K1 Chloride penetration
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
AB The construction industry in general is, through minor low-cost processing methods, convertingseveral of its by-products into viable materials; furthermore, some siderurgic sector by-productsare likewise of use. In this context, large-scale batches (mix volumes over 0.5 m3) of good qualitystructural concrete are proposed, in which two kinds of binder and two kinds of aggregate (steelslag and recycled concrete) are used to perform four concrete mixtures, containing more than 80% in mass of good-quality recycled materials. A batch of tests, both in the fresh and in thehardened state, are performed, covering on-site placement and long-term properties, to guaranteethe suitability and the quality of the mixtures as structural concretes. Most of the results wereencouraging, mainly depending on the aggregate and the binder types that were used. The freshstate workability of all the test mixtures was good. All the results in terms of hardened properties,strength (42 MPa in type I cement mixtures, and 32–38 MPa in type III cement mixtures), stiffness, long-term shrinkage, and microstructural state (porosity, permeability) were acceptable,their quality depending on the type of each component. The good results of the mixtures based onthe slag-based binder deserve attention. Some weak points found were the slightly higher specificweight of the slag aggregate mixes (amounting to more than 2.7 Mg/m3), plastic shrinkage rates(in some cases greater than 1.2–1.5 thousand), and loss of resistance against chlorine penetrationin recycled concrete mixes. However, drawbacks of that sort are no obstacle to their use in moststructural applications.
PB Elsevier
SN 2214-5095
YR 2023
FD 2023-07
LK http://hdl.handle.net/10259/8000
UL http://hdl.handle.net/10259/8000
LA eng
NO The authors wish to express their gratitude to the following entities for the funding they provided: MCIN/AEI/10.13039/501100011033 and ERDF A way of making Europe, the European Union, and Next Generation EU/PRTR [PID2020-113837RB-I00; PID2021–124203OB-I00 and TED2021-129715B-I00]; the Junta de Castilla y León (Regional Government) and ERDF [UIC-231]; the Basque Government [IT1619-22 SAREN Research Group]; the University of Burgos [Y135. GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 22-nov-2024