Effects of temperature and moisture fluctuations for suitable use of raw-crushed wind-turbine blade in concrete

• DOI: 10.1007/s11356-024-33720-0
• Publication Date: 2024-05-24T04:01:26Z
• Authors: Víctor Revilla-Cu...; Nerea Hurtado-Alonso; Javier Manso-Morato; Roberto Serrano-L...; Juan M. Manso
• Keywords: Cementitious

Raw-crushed wind-turbine blade (RCWTB), a waste from the recycling of blades, is used as raw material in concrete this research. It contains not only fiberglass-composite fibers that bridge cementitious matrix but also polyurethane and balsa-wood particles. Therefore, containing RCWTB can be notably affected by moisture temperature fluctuations exposure to high temperatures. In research, performance five mixes with 0.0%, 1.5%, 3.0%, 4.5%, 6.0% RCWTB, respectively, studied under moist/dry, alternating-sign-temperature-shock, high-temperature-shock tests. Two damage mechanisms within were found through these tests: on one hand, micro-cracking matrix, which was verified microscopic analyses dependent porosity; other, degradation components, melted, particles burned. Both phenomena led larger remaining-strain levels reduced compressive strength up 25% humidity variations, although bridging effect effective when adding amounts higher than 3.0%. The compressive-strength loss after test increased content, reaching maximum values 8% an time 7 days. Statistical revealed RCA amount conditioned times all accurate definition those therefore key set content ensures its suitable behavior environmental conditions analyzed.