RT info:eu-repo/semantics/article
T1 Degradation under cyclic wet-dry aging of full-scale high-workability concrete maximizing sustainable raw materials
A1 Revilla Cuesta, Víctor
A1 Manso Morato, Javier
A1 Hurtado Alonso, Nerea
A1 Santamaría, Amaia
A1 San-José, José T.
K1 Steelmaking slag
K1 Recycled concrete aggregate
K1 High-workability concrete
K1 Wet-dry performance
K1 Linear thermal expansion coefficient
K1 Hardened-property variations
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
K1 Resistencia de materiales
K1 Strength of materials
AB Analyzing and validating the behavior of sustainable concrete mixes under near-realistic conditions is essential to advance their use. In this research, full-scale high-workability concretes, 0.5 m3 in volume, containing maximum amounts of sustainable raw materials and their response in cyclic wet-dry tests are studied. The mixtures contained Electric Arc Furnace Slag (EAFS) and Recycled Concrete Aggregate (RCA) as aggregates, and Ladle Furnace Slag (LFS) and Ground Granulated Blast-furnace Slag (GGBS) as binders. Each mixture underwent 30 wet-dry cycles with temperature variations between 20 °C and 70 °C. Throughout the cycles, the internal-damage level was assessed through (increasing) weight measurements, (decreasing) ultrasonic-pulse-velocity readings, thermal strain, hardened-property variations, and flexural deformability. Overall, all the mixes underwent initial internal damage, attributable to both the thermal shock that increased with each cycle and the aging of the cementitious matrix, which in turn resulted in shrinking that reduced their thermal deformability. A linear thermal expansion coefficient of 1.6·10-5 °C-1 was adequate for safely estimating all the maximum thermal strains. Internal damage was less relevant with the use of EAFS and GGBS that led to fewer strength decreases, which were only 15–20% compared to 25–30% in the RCA mixes. However, the combination of EAFS and LFS increased flexural deformability after the test, which resulted in compliance under bending stresses that was two times higher than in the other mixes. Under those conditions, the joint use of EAFS and GGBS was the most recommendable multi-criteria and multi-purpose option where any change in concrete composition significantly affected behavior.
PB Elsevier
SN 2214-5095
YR 2024
FD 2024-07
LK http://hdl.handle.net/10259/9309
UL http://hdl.handle.net/10259/9309
LA eng
NO This research work was supported by the Spanish Ministry of Universities, MICINN, AEI, EU, “ERDF A way of making Europe”, by the “European Union” and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00; PID2021-124203OB-I00; PID2023-146642OB-I00; 10.13039/501100011033; TED2021-129715B-I00; FPU21/04364]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231; BU033P23; BU066-22]; the Basque Government [IT1619-22 SAREN research group]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024