Incorporation of glass fibre powder derived from wind turbine blades in OPC–alkali-activated hybrid binders
File(s)
Published version
Author(s)
Mao, Yuguang
He, Li
Wu, Chao
Type
Journal Article
Abstract
Reusing glass fiber powder (GFP) recovered from waste wind turbine blades (WTB) through alkali activation in Portland cement–alkali-activated hybrid binders (OPC–AAHB) offers a promising pathway for sustainable material reuse. This study systematically evaluates the feasibility of incorporating GFP into OPC–AAHB systems. GFP replacement levels ranging from 30% to 60% were investigated. Two alkaline activators were examined: NaOH solution and solid Ca(OH)₂, each applied at dosages of 3% and 6% by binder mass. The results show that NaOH activation leads to a pronounced reduction in compressive strength. This behaviour is primarily attributed to the high alkalinity of NaOH, which severely suppresses cement hydration, the dominant contributor to strength development in GFP-based OPC–AAHB systems. In contrast, when Ca(OH)₂ is introduced as a solid alkali activator, GFP can function effectively as a reactive SCM or precursor. Owing to its moderate alkalinity and controlled activation behaviour, Ca(OH)₂ does not significantly hinder cement hydration and promotes the formation of C–A–S–H, which is denser than conventional C–S–H.Among all investigated mixtures, the paste containing 30% GFP replacement and 3% Ca(OH)₂ exhibits the best compressive strength performance. These findings demonstrate the potential of Ca(OH)₂-activated GFP derived from WTB for the development of viable OPC–AAHB systems.
Date Issued
2026-05-16
Date Acceptance
2026-04-06
Citation
Construction and Building Materials, 2026, 523
ISSN
0950-0618
Publisher
Elsevier BV
Journal / Book Title
Construction and Building Materials
Volume
523
Copyright Statement
© 2026 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Publication Status
Published
Article Number
146275
Date Publish Online
2026-04-08