2026-04-17T19:03:13Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/107072025-07-15T00:05:34Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

2025-07-14T11:59:37Z urn:hdl:10259/10707 Deepening the effect of selectively crushed wind-turbine blade on the dimensional stability and high-temperature resistance of concrete Revilla Cuesta, Víctor Skaf Revenga, Marta Manso Morato, Javier Hurtado Alonso, Nerea Manso Villalaín, Juan Manuel Selectively crushed wind-turbine blade Concrete Dimensional stability Accelerated aging Thermal shock Selectively Crushed Wind-Turbine Blade (SCWTB) is obtained through knife crushing of panels from wind-turbine blades. Two thirds of SCWTB weight consist of GFRP-composite fibers, which may improve both dimensional stability and high-temperature resistance of concrete. In this investigation, the evaluation of such aspects in concrete containing 1.5 %, 3.0 %, 4.5 % and 6.0 % SCWTB by volume is addressed. For this purpose, plastic shrinkage, drying shrinkage, total shrinkage, and thermal expansion were evaluated regarding dimensional stability, while resistance to high temperatures was assessed through accelerated-aging and thermal-shock tests. The results revealed that 6.0 % SCWTB reduced by half concrete plastic shrinkage, and total shrinkage by 40–50 % at 7 days and by 10–20 % at 91 days. Furthermore, the initial thermal strain was decreased from SCWTB contents of 3.0 %, which in turn reduced the linear thermal expansion coefficient, which had a value of 1.49·10−5 °C−1 in concrete with 6.0 % SCWTB. Finally, concrete with SCWTB maintained adequate compressive strength after accelerated aging and air-heating thermal shock, reaching values above 40 MPa, and halved the loss of flexural strength when added in a content of 6.0 %. Scanning electron microscopy revealed that high temperatures caused micro-cracks that started in weak zones and propagated along the glass fibers of GFRP, but the bond between the cementitious matrix and the GFRP-composite fibers was ideal, so the matrix fractured instead of the fibers slipping when loading. The improvements induced by SCWTB were statistically significant, so this waste can be considered a value-added material in terms of the concrete behavior analyzed. 2025-07-14T11:59:37Z 2025-07-14T11:59:37Z 2025-10 info:eu-repo/semantics/article 2352-7102 https://hdl.handle.net/10259/10707 10.1016/j.jobe.2025.113440 eng Journal of Building Engineering. 2025, V. 111, 113440 https://doi.org/10.1016/j.jobe.2025.113440 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/PID2023-146642OB-I00/ES/Análisis integral de hormigones, con triturado de palas de aerogeneradores y árido reciclado de sus cimentaciones, diseñados para la industria de la prefabricación/WINDPRE/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/TED2021-129715B-I00/ES/Reciclaje de palas y cimentaciones de aerogeneradores en hormigón para nuevos parques eólicos de alta potencia/ info:eu-repo/grantAgreement/MIU/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/FPU21%2F04364/ES/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU033P23//Reciclaje de palas de aerogenerador para una industria eólica sostenible: estudio del tratamiento en origen y optimización de su contenido en mezclas de hormigón/EOLOOP/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU066-22/ info:eu-repo/grantAgreement/UBU//Y135.GI/ http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier