RT info:eu-repo/semantics/article
T1 Effects of temperature and moisture fluctuations for suitable use of raw-crushed wind-turbine blade in concrete
A1 Revilla Cuesta, Víctor
A1 Hurtado Alonso, Nerea
A1 Manso Morato, Javier
A1 Serrano López, Roberto
A1 Manso Villalaín, Juan Manuel
K1 Raw-crushed wind-turbine blade
K1 Concrete
K1 Moist/dry test
K1 Alternating-sign temperatures
K1 Thermal shock
K1 Multiple-regression statistical prediction
K1 Hormigón-Ensayos
K1 Concrete-Testing
K1 Materiales de construcción
K1 Building materials
AB Raw-crushed wind-turbine blade (RCWTB), a waste from the recycling of wind-turbine blades, is used as a raw material in concrete in this research. It contains not only fiberglass-composite fibers that bridge the cementitious matrix but also polyurethane and balsa-wood particles. Therefore, concrete containing RCWTB can be notably affected by moisture and temperature fluctuations and by exposure to high temperatures. In this research, the performance of five concrete mixes with 0.0%, 1.5%, 3.0%, 4.5%, and 6.0% RCWTB, respectively, is studied under moist/dry, alternating-sign-temperature-shock, and high-temperature-shock tests. Two damage mechanisms of RCWTB within concrete were found through these tests: on the one hand, micro-cracking of the cementitious matrix, which was verified by microscopic analyses and was dependent on concrete porosity; on the other, damage and degradation of the RCWTB components, as the polyurethane melted, and the balsa-wood particles burned. Both phenomena led to larger remaining-strain levels and reduced concrete compressive strength by up to 25% under temperature and humidity variations, although the bridging effect of the fiberglass-composite fibers was effective when adding RCWTB amounts higher than 3.0%. The compressive-strength loss after the high-temperature-shock test increased with the RCWTB content, reaching maximum values of 8% after an exposure time of 7 days. Statistical analyses revealed that effect of the RCA amount in the concrete was conditioned by the exposure times in all the tests. The accurate definition of those times is therefore key to set an RCWTB content in concrete that ensures its suitable behavior under the environmental conditions analyzed.
PB Springer
SN 0944-1344
YR 2024
FD 2024-05
LK http://hdl.handle.net/10259/9763
UL http://hdl.handle.net/10259/9763
LA eng
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This research work was funded by the Spanish Ministry of Universities, MICINN, AEI, EU, ERDF, and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00, PID2023-146642OB-I00,https://doi.org/10.13039/501100011033, TED2021-129715B-I00, and FPU21/04364]; the Junta de Castilla y León (Regional Government) and ERDF [grant numbers UIC-231, BU033P, and3; BU066-22]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 12-dic-2024