2026-04-17T11:44:23Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/99352025-01-16T01:05:40Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

Analysis of raw-crushed wind-turbine blade as an overall concrete addition: Stress–strain and deflection performance effects Ortega López, Vanesa Faleschini, Flora Hurtado Alonso, Nerea Manso Morato, Javier Revilla Cuesta, Víctor Raw-crushed wind-turbine blade Concrete Stress-strain curve Transverse deformation Load-deflection curve Deformability under indirect-tensile stresses Ingeniería civil Civil engineering Materiales de construcción Building materials Hormigón-Ensayos Concrete-Testing End-of-life wind-turbine blades undergo non-selective crushing to produce Raw-Crushed Wind-Turbine Blade (RCWTB), which can be recycled as a raw material in concrete. RCWTB contains fibers from glass fiber-reinforced polymer that can add ductility and load-bearing capacity to concrete. Concrete mixes with percentage additions of between 0.0 % and 6.0 % RCWTB by volume are produced to analyze their compressive stress–strain performance, their deflection under bending forces, and their deformability under indirect-tensile stresses. Higher RCWTB contents increased deformability in the longitudinal direction under compression, the concrete material absorbing energy levels that were up to 111.4 % higher, even though additions of only 6.0 % RCWTB were sufficient to strengthen the load-bearing capacity. RCWTB fiber stitching effect was most noticeable in the transverse direction under compression, as it reduced elastic deformability and failure strain, removed the yield step caused by vertical-splitting cracking, and increased the fracture strain by up to 94.4 %. With regard to deflection, RCWTB fibers conditioned concrete compliance at advanced ages without any dependence on the modulus of elasticity, and percentage additions from 3.0 % provided load-bearing capacity. This advantage was also noted in indirect-tensile stresses for 6.0 % RCWTB. In summary, RCWTB successfully increased the ductility and load-bearing capacity of concrete per unit strength and carbon footprint. This research work was supported by the Spanish Ministry of Universities within the framework of the State Program for the Promotion of Talent and its Employability in the R + D + i, State Mobility Subprogram of the State Plan for Scientific and Technical Research and Innovation 2021-2023 [CAS22/00013]; MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-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 University of Burgos [grant number SUCONS, Y135.GI]; and, finally, the University of Padova. 2025-01-15T13:18:58Z 2025-01-15T13:18:58Z 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0263-8223 http://hdl.handle.net/10259/9935 10.1016/j.compstruct.2024.118170 eng Composite Structures. 2024, V. 340, 118170 https://doi.org/10.1016/j.compstruct.2024.118170 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier