RT info:eu-repo/semantics/article
T1 Bending performance of concrete with coarse recycled aggregate and raw-crushed wind-turbine blade at an early age
A1 Ortega López, Vanesa
A1 Faleschini, Flora
A1 Manso Villalaín, Juan Manuel
A1 Revilla Cuesta, Víctor
K1 Raw-crushed wind-turbine blades
K1 Coarse recycled aggregate
K1 Concrete
K1 Load-deflection test
K1 Deformability
K1 Energy absroption
K1 Materiales de construcción
K1 Building materials
K1 Hormigón-Ensayos
K1 Concrete-Testing
AB The bonded mortar in the Coarse Recycled Aggregate (CRA) reduces both the adhesion in the interfacial transition zones and the stiffness of concrete, which worsens concrete bending behavior. These aspects are more remarkable at early ages due to the lower strength and stiffness developed by the concrete matrix. The stitching effect of the 66.8% by weight of Glass Fiber-Reinforced Polymer (GFRP) fibers contained in Raw-Crushed Wind-Turbine Blade (RCWTB) can counteract these phenomena. This research analyzes the bending behavior of concrete made with up to 100% CRA in combination with 6% RCWTB as aggregate replacement. Early ages (1, 3, and 7 days) and both moist and ambient curing are considered to cover all possible put-into-service situations of concrete elements. Compared to concrete with the same composition but without RCWTB, this waste increased the pre-failure compliance by up to 26.9%, the failure deflection by up to 12.8%, and the failure stress by up to 37.5% when combined with as much as 50% CRA. An earlier concrete age and ambient curing made such effects more notable due to the weaker cementitious matrix. Furthermore, RCWTB provided post-failure load-bearing capacity to concrete, the incorporation of 6% RCWTB to concrete with 50% CRA increasing the absorbed energy under bending loading by 135%. RCWTB also allowed the energy absorbed by concrete to be almost unaffected when adding any CRA amount. All these effects were statistically significant and demonstrate that RCWTB improves the bending deformability of concrete produced with CRA, mainly because of the deflection improvement it caused.
PB Springer
YR 2025
FD 2025-05
LK http://hdl.handle.net/10259/10478
UL http://hdl.handle.net/10259/10478
LA eng
NO g Open access funding provided by FEDER European Funds and the Junta de Castilla y León under the Research and Innovation Strategy for Smart Specialization (RIS3) of Castilla y León 2021-2027. This research work was supported by the Spanish Ministry of Universities, MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2023- 146642OB-I00;https://doi.org/10.13039/501100011033; TED2021-129715B-I00]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231; BU033P23]; and, fnally, the University of Burgos [grant number SUCONS, Y135.GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 17-may-2025