Effect of Lime Neutralization Wastewater on the Performance of Alkali-Activated Slag / Fly Ash Mortars

Effect of Lime Neutralization Wastewater on the Performance of Alkali-Activated Slag / Fly Ash Mortars | 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 Lime Neutralization Wastewater on the Performance of Alkali-Activated Slag / Fly Ash Mortars Tao Zhou, Jin Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4331974/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Oct, 2024 Read the published version in Materials and Structures → Version 1 posted 5 You are reading this latest preprint version Abstract This paper was conducted to upcycle lime-neutralize etching wastewater (LNW), produced from the etching of cenospheres for producing perforated cenospheres (PCs), into alkali-activated slag / fly ash, considering the high contents of Ca2+, Cl-, and OH-. The effects of LNW on the fresh properties, hydration products, compressive strength, microstructure and nanomechanical properties of AASF were investigated. Results revealed that the addition of LNW extended the setting times and inhibited the early hydration of AASF due to the existence of Ca2+ and NH4+ in LNW. In addition, the existence of Ca2+ in LNW reacts with NaOH to form Ca(OH)2, which can work as an auxiliary activator for AASF. Consequently, the LNW-added AASF mortars exhibited denser pore structures and higher compressive strengths. By using 25—100% LNW, the compressive strengths of AASF mortars can be improved by 2.7—18.9% (3d), 4.8—19.5% (7d) and 5.6—19.7% (28d), respectively. Alkali-Activated Slag / Fly Ash Neutralization Wastewater Nanomechanical Properties Compressive strength Pore structure Full Text Cite Share Download PDF Status: Published Journal Publication published 29 Oct, 2024 Read the published version in Materials and Structures → Version 1 posted Reviewers agreed at journal 18 Aug, 2024 Reviewers invited by journal 18 Aug, 2024 Editor invited by journal 13 May, 2024 Editor assigned by journal 06 May, 2024 First submitted to journal 02 May, 2024 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. 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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-4331974","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":341682913,"identity":"28e1e1f6-265e-4163-9f12-fa50b573da9c","order_by":0,"name":"Tao Zhou","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA6klEQVRIie3PMUvDQBjG8bccJA5Pm/WKof0KkcJNgX6VC4GbTuiYoUOlYgfjno/R0TFBuCznnsEhUtBVcelUxLmSxM3hfvPzh/clcpx/yJu/119HnBD426qV2bo/mZBWjMIynOYmjVpr+pMZScEoLuOo0WL6essGHEalOqz0C6hRKks2HgW7e9mdjG7qRWHfMMoPpkkeQ+L2ed+dMJJ8nDMwX6kmsR5F/Lon+dmMTwweabFK7tiABCQugSfgQgsalnCkVwUUOEzKpTXo/WVe+FX7gXi5rLfV5zFbz4LdQ3dyBn+bO47jOL/6BrIuR8Dab/c1AAAAAElFTkSuQmCC","orcid":"https://orcid.org/0009-0006-8491-8477","institution":"Anhui University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"Tao","middleName":"","lastName":"Zhou","suffix":""},{"id":341682914,"identity":"422a26ad-9012-419f-9d10-285a2138385f","order_by":1,"name":"Jin Li","email":"","orcid":"","institution":"Anhui University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Jin","middleName":"","lastName":"Li","suffix":""}],"badges":[],"createdAt":"2024-04-27 01:54:51","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4331974/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4331974/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1617/s11527-024-02494-9","type":"published","date":"2024-10-29T16:20:39+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":68207295,"identity":"9458723d-0dee-44e3-a112-96365c0ce7c7","added_by":"auto","created_at":"2024-11-04 16:36:34","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":874157,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4331974/v1_covered_55adabf0-b6a7-4dba-ac2b-4e7504418a60.pdf"}],"financialInterests":"","formattedTitle":"Effect of Lime Neutralization Wastewater on the Performance of Alkali-Activated Slag / Fly Ash Mortars","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"materials-and-structures","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"maas","sideBox":"Learn more about [Materials and Structures](http://link.springer.com/journal/11527)","snPcode":"11527","submissionUrl":"https://www.editorialmanager.com/maas/default2.aspx","title":"Materials and Structures","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Alkali-Activated Slag / Fly Ash, Neutralization Wastewater, Nanomechanical Properties, Compressive strength, Pore structure","lastPublishedDoi":"10.21203/rs.3.rs-4331974/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4331974/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"This paper was conducted to upcycle lime-neutralize etching wastewater (LNW), produced from the etching of cenospheres for producing perforated cenospheres (PCs), into alkali-activated slag / fly ash, considering the high contents of Ca2+, Cl-, and OH-. 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