Mechanical and Microstructural Performance of Geopolymer Concrete Incorporating Waste Glass Powder and Tire Fiber Aggregate

Mechanical and Microstructural Performance of Geopolymer Concrete Incorporating Waste Glass Powder and Tire Fiber Aggregate | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Mechanical and Microstructural Performance of Geopolymer Concrete Incorporating Waste Glass Powder and Tire Fiber Aggregate S. M OSMAN, S.J.S. Hakim, A.M. Mhaya, M.H.W. Ibrahim, S.N. Mokhatar, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9387083/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 17 You are reading this latest preprint version Abstract This study investigates the effects of fly ash (FA), ground granulated blast furnace slag (GGBS), and waste glass powder (WGP) as binders, with waste tire fiber aggregates (TFA) as partial fine aggregates, on the mechanical properties and microstructural performance of geopolymer concrete. The optimal WGP content in blended FA and GGBS was determined using slump and compressive strength tests at 3%, 6%, 9%, and 12% WGP. Waste TFA at 5%, 10%, 20%, and 30% were then used in combination with the optimal FA-GGBS-WGP blend. An alkaline activator consisting of Na₂SiO₃ and NaOH at a 2:1 ratio with 12 M concentration was used. The findings indicated that an optimal WGP content of 9% of the total binder mass increased the slump and improved the 28-day compressive strength by 6% compared to the control mix. TFA incorporation reduced the 28-day compressive strength of geopolymer concrete. Low TFA contents (5–10%) enhanced both tensile and flexural strengths, with 10% TFA producing the highest improvements of 27% in tensile strength and 30% in flexural strength. However, higher TFA contents (20–30%) significantly reduced workability and mechanical properties. At 30% TFA, slump decreased by 48%, while compressive, tensile, and flexural strengths declined by 58%, 31%, and 17%, respectively. Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR) analyses confirmed the formation of N-A-S-H and C-A-S-H gels, improving matrix integrity and microstructure. Overall, the combined use of WGP and TFA in GPC significantly enhanced mechanical strength, durability, and structural performance. Geopolymer Concrete Mechanical Properties Microstructural Performance Waste Glass Powder Tire Fiber Aggregate Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 13 May, 2026 Reviews received at journal 09 May, 2026 Reviewers agreed at journal 08 May, 2026 Reviewers agreed at journal 07 May, 2026 Reviews received at journal 06 May, 2026 Reviewers agreed at journal 06 May, 2026 Reviews received at journal 05 May, 2026 Reviewers agreed at journal 05 May, 2026 Reviewers agreed at journal 02 May, 2026 Reviewers agreed at journal 01 May, 2026 Reviewers agreed at journal 01 May, 2026 Reviewers agreed at journal 01 May, 2026 Reviewers invited by journal 01 May, 2026 Editor invited by journal 23 Apr, 2026 Editor assigned by journal 13 Apr, 2026 Submission checks completed at journal 13 Apr, 2026 First submitted to journal 11 Apr, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9387083","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":637320303,"identity":"7ae52584-7951-4dcb-9021-aa1ab641f10f","order_by":0,"name":"S. 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