Effect of Steel and Polypropylene Hybrid Fibers on Mechanical Properties of Recycled Aggregate M30 Concrete

Effect of Steel and Polypropylene Hybrid Fibers on Mechanical Properties of Recycled Aggregate M30 Concrete | 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 Effect of Steel and Polypropylene Hybrid Fibers on Mechanical Properties of Recycled Aggregate M30 Concrete Om Ghadage, U. L. Deshpande This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7026320/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract This research focuses on studying the mechanical properties of recycled aggregate concrete (RAC) when hybrid fibers (steel and polypropylene) are added. Due to the increasing demand for natural aggregates and the growing problem of construction and demolition waste, recycled aggregates are seen as a sustainable alternative. However, RAC usually has lower strength because of the weak and porous nature of old mortar attached to the recycled aggregate. In this study, M30-grade concrete was prepared by replacing natural coarse aggregate with recycled coarse aggregate in proportions of 25% and 50%. Hybrid fibers were added in 1%, 2%, and 3% by volume. Concrete cubes, cylinders, and beams were cast and tested for compressive, split tensile, and flexural strength at 7, 14, and 28 days. The results showed that adding 2% hybrid fiber and 25% recycled aggregate gave the best strength results. The compressive strength reached close to 48.31 N/mm². Also, the split tensile and flexural strengths improved. This shows that hybrid fibers improve the performance of RAC and make it more suitable for structural use. This study supports the idea that recycled materials when used with fibers, can reduce waste and save natural resources. Recycled Aggregate Concrete Hybrid Fiber Reinforcement Steel Fiber Polypropylene Fiber Mechanical Properties M30 Grade concrete Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted 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-7026320","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":485697991,"identity":"20e97ce3-9b83-4b95-8028-a9a4483d6e4c","order_by":0,"name":"Om Ghadage","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA8ElEQVRIiWNgGAWjYHACNjBiYGZsfACkePiI18Le3GwA0sJGvBae420SUC5+wC92/NqDH2V2dv0SiW2VX3PsZNgYmB8+uoFHi+TsnHLDnnPJyTNnJLbdlt2WDHQYm7FxDh4tBrdz0iR425iTDW4AtUhuYwZq4WGTJqRF8m9bfbI9UEux5LZ6YrSkH5PmbTtsZ8BzsI3x47bDhLUA/cImLXPueILE8cZmacZtx3nYmAn4hV86/Znkm7Jqe/5m9ocff24DMtibHz7GpwUYH6AIZEhsABLMPCAmM17lIMD+AETagwjGHwRVj4JRMApGwUgEAFomRyMqw7g1AAAAAElFTkSuQmCC","orcid":"","institution":"Government College of Engineering","correspondingAuthor":true,"prefix":"","firstName":"Om","middleName":"","lastName":"Ghadage","suffix":""},{"id":485697992,"identity":"996517d1-c67d-47e5-aa50-243ede975070","order_by":1,"name":"U. 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