RT info:eu-repo/semantics/article
T1 Mechanical properties of concrete mixes with Selectively Crushed Wind Turbine Blade: Comparison with Raw-Crushing
A1 Revilla Cuesta, Víctor
A1 Espinosa González, Ana Belén
A1 Serrano López, Roberto
A1 Skaf Revenga, Marta
A1 Manso Villalaín, Juan Manuel
K1 Selectively crushed wind turbine blade
K1 Concrete
K1 Mechanical performance
K1 Significative effect
K1 Raw-crushing
K1 Resulting material comparison
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
K1 Hormigón-Ensayos
K1 Concrete-Testing
AB The glass fiber-reinforced polymer (GFRP) materials of wind turbine blades can be recovered and recycled by crushing, thereby solving one of the most perplexing problems facing the wind energy sector. This process yields selectively crushed wind turbine blade (SCWTB), a novel waste that is almost exclusively composed of GFRP composite fibers that can be revalued in terms of their use as a raw material in concrete production. In this research, the fresh and mechanical performance of concrete made with 1.5%, 3.0%, 4.5%, and 6.0% SCWTB is studied. Once incorporated into concrete mixes, SCWTB waste slightly reduced slumps due to the large specific surface area of the fibers, and the stitching effect of the fibers on mechanical behavior was generally adequate, as scanning electron microscopy demonstrated good fiber adhesion within the cementitious matrix. Thus, despite the increase in the content of water and plasticizers when adding this waste to preserve workability, the compressive strength only decreased in the long term with the addition of 6.0% SCWTB, a value of 45 MPa always being reached at 28 days; Poisson’s coefficient remained constant from 3.0% SCWTB; splitting tensile strength was maintained at around 4.7 MPa up to additions of 3.0% SCWTB; and the flexural strength of mixes containing 6.0% and 1.5% SCWTB was statistically equal, with a value near 6.1 MPa. Furthermore, all mechanical properties of the concrete except for flexural strength were improved with additions of SCWTB compared to raw crushed wind turbine blade, which apart from GFRP composite fibers contains approximately spherical polymer and balsa wood particles. Flexural strength was conditioned by the proportion of fibers, their dimensions, and their strength, which were almost identical for both waste types. SCWTB would be preferable for applications in which compression stresses predominate.
PB MDPI
SN 1996-1944
YR 2024
FD 2024-12-23
LK http://hdl.handle.net/10259/9871
UL http://hdl.handle.net/10259/9871
LA eng
NO This research work was supported by MICIU, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00; 10.13039/501100011033; PID2023-146642OB-I00; TED2021-129715B-I00]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231; BU033P23]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI]
DS Repositorio Institucional de la Universidad de Burgos
RD 21-ene-2025