{"paper_id":"3ced24e4-09ab-4370-95db-e41fc0f0cc7e","body_text":"Compression behavior of historical brick masonry with mortar joint spalling strengthened with composite grouting and natural hemp fiber rope reinforcement | 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 Article Compression behavior of historical brick masonry with mortar joint spalling strengthened with composite grouting and natural hemp fiber rope reinforcement Shanwei Wang, Aiping Han, Zhaobo Meng, Qingshuang Zhao, Tengfei Zhao, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7484599/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 16 You are reading this latest preprint version Abstract This study fabricated historical brick column specimens with mortar joint spalling. Modified composite sticky rice-lime mortar and natural hemp fiber rope were adopted and horizontal mortar joint grouting and fiber rope reinforcement were implemented to prepare performance-enhanced historical brick column specimens. The compression failure morphology and mechanical properties of the specimens with different strengthening conditions were studied, and the variation patterns of mechanical performance indicators with the strengthening conditions were analyzed. The calculation formula for the compressive strength was proposed, and the full stress-strain relationship model under compression and the crack length development model were established. The results show that the non-strengthened brick columns exhibit brittle failure morphology under compression, and the compressive strength and deformation modulus decrease with the increasing mortar joint spalling depth. The crack development process of reinforced brick columns under compression presents ductile characteristics. The compressive strength and crack density increase obviously and mortar joint grouting-fiber rope reinforcement significantly enhances the elastoplastic deformation capacity. The compressive strength, crack density, and elastic modulus of brick columns with the 12.5% grouting depth ratio and 0.125% reinforcement ratio increase by 57.4%, 7.9%, and 29.4%, respectively. The proposed strengthening method provides good engineering applicability. Physical sciences/Engineering Physical sciences/Materials science Historical brick masonry Mortar joint spalling Performance enhancement Full stress-strain relationship Compression deformation modulus Crack density distribution Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 23 Oct, 2025 Reviews received at journal 18 Oct, 2025 Reviews received at journal 10 Oct, 2025 Reviewers agreed at journal 10 Oct, 2025 Reviews received at journal 09 Oct, 2025 Reviewers agreed at journal 09 Oct, 2025 Reviewers agreed at journal 09 Oct, 2025 Reviewers agreed at journal 09 Oct, 2025 Reviewers agreed at journal 07 Oct, 2025 Reviewers agreed at journal 07 Oct, 2025 Reviewers agreed at journal 23 Sep, 2025 Reviewers invited by journal 22 Sep, 2025 Editor assigned by journal 17 Sep, 2025 Editor invited by journal 17 Sep, 2025 Submission checks completed at journal 16 Sep, 2025 First submitted to journal 16 Sep, 2025 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. 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strengthened with composite grouting and natural hemp fiber rope reinforcement\",\"fulltext\":[],\"fulltextSource\":\"\",\"fullText\":\"\",\"funders\":[],\"hasAdminPriorityOnWorkflow\":false,\"hasManuscriptDocX\":false,\"hasOptedInToPreprint\":true,\"hasPassedJournalQc\":\"\",\"hasAnyPriority\":false,\"hideJournal\":false,\"highlight\":\"\",\"institution\":\"\",\"isAcceptedByJournal\":false,\"isAuthorSuppliedPdf\":true,\"isDeskRejected\":\"\",\"isHiddenFromSearch\":false,\"isInQc\":false,\"isInWorkflow\":false,\"isPdf\":true,\"isPdfUpToDate\":true,\"isWithdrawnOrRetracted\":false,\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"scientific-reports\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":false,\"externalIdentity\":\"scirep\",\"sideBox\":\"Learn more about [Scientific Reports](http://www.nature.com/srep/)\",\"snPcode\":\"\",\"submissionUrl\":\"\",\"title\":\"Scientific 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Modified composite sticky rice-lime mortar and natural hemp fiber rope were adopted and horizontal mortar joint grouting and fiber rope reinforcement were implemented to prepare performance-enhanced historical brick column specimens. The compression failure morphology and mechanical properties of the specimens with different strengthening conditions were studied, and the variation patterns of mechanical performance indicators with the strengthening conditions were analyzed. The calculation formula for the compressive strength was proposed, and the full stress-strain relationship model under compression and the crack length development model were established. The results show that the non-strengthened brick columns exhibit brittle failure morphology under compression, and the compressive strength and deformation modulus decrease with the increasing mortar joint spalling depth. The crack development process of reinforced brick columns under compression presents ductile characteristics. The compressive strength and crack density increase obviously and mortar joint grouting-fiber rope reinforcement significantly enhances the elastoplastic deformation capacity. The compressive strength, crack density, and elastic modulus of brick columns with the 12.5% grouting depth ratio and 0.125% reinforcement ratio increase by 57.4%, 7.9%, and 29.4%, respectively. 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