Effect of Fe3+ ions on the improvement of mechanical properties of MICP-reinforced calcareous sand

Effect of Fe3+ ions on the improvement of mechanical properties of MICP-reinforced calcareous sand | 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 Fe3+ ions on the improvement of mechanical properties of MICP-reinforced calcareous sand Renjie Wei, Jin Zhu, Jie Peng, Liangliang Li, Di Dai, Zhiyang Shang, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4564661/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 Reinforcement of calcareous sands based on microbial induced calcium carbonate precipitation (MICP) method has become a hot research topic in recent years. However, the disadvantage of MICP method is that the desired effect of improvement can only be achieved by multiple treatments of the cementing solution. In order to enhance the efficiency of MICP in reinforcing calcareous sands, an appropriate amount of iron ions was added to the cementing solution, followed by solution tests and sand column tests to assess the reinforcement effect through calcium carbonate generation, UCS and permeability coefficient. The results show that iron ions can change the morphology and size of MICP calcium carbonate in the solution test; in the sand column test, when iron ions were added to the cementing solution, the UCS of the sand column could reach up to 2832.63 kPa after five injections, and the UCS of the conventional MICP test group under the same conditions was only 185.5 kPa, and the permeability coefficient was reduced by two orders of magnitude compared with that of untreated sand. Iron ions did not increase the amount of MICP calcium carbonate in the sand column test, but changed the distribution pattern of calcium carbonate, thus increasing the strength and decreasing the permeability coefficient of the sand. MICP Fe3+ ion CaCO3 distribution pattern UCS coefficient of permeability 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. 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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-4564661","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":317957952,"identity":"6a0b59b5-4acd-4a4b-97b7-c66a8b377056","order_by":0,"name":"Renjie Wei","email":"","orcid":"","institution":"Hohai University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Renjie","middleName":"","lastName":"Wei","suffix":""},{"id":317957955,"identity":"8f4da5c4-dfb1-4862-8476-fdabfc269ca1","order_by":1,"name":"Jin 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permeability","lastPublishedDoi":"10.21203/rs.3.rs-4564661/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4564661/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eReinforcement of calcareous sands based on microbial induced calcium carbonate precipitation (MICP) method has become a hot research topic in recent years. However, the disadvantage of MICP method is that the desired effect of improvement can only be achieved by multiple treatments of the cementing solution. In order to enhance the efficiency of MICP in reinforcing calcareous sands, an appropriate amount of iron ions was added to the cementing solution, followed by solution tests and sand column tests to assess the reinforcement effect through calcium carbonate generation, UCS and permeability coefficient. The results show that iron ions can change the morphology and size of MICP calcium carbonate in the solution test; in the sand column test, when iron ions were added to the cementing solution, the UCS of the sand column could reach up to 2832.63 kPa after five injections, and the UCS of the conventional MICP test group under the same conditions was only 185.5 kPa, and the permeability coefficient was reduced by two orders of magnitude compared with that of untreated sand. Iron ions did not increase the amount of MICP calcium carbonate in the sand column test, but changed the distribution pattern of calcium carbonate, thus increasing the strength and decreasing the permeability coefficient of the sand.\u003c/p\u003e","manuscriptTitle":"Effect of Fe3+ ions on the improvement of mechanical properties of MICP-reinforced calcareous sand","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-06-28 05:20:51","doi":"10.21203/rs.3.rs-4564661/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"7f719f17-5738-4300-a506-ac437973de49","owner":[],"postedDate":"June 28th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-10-14T01:38:35+00:00","versionOfRecord":[],"versionCreatedAt":"2024-06-28 05:20:51","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4564661","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4564661","identity":"rs-4564661","version":["v1"]},"buildId":"-HB7Z8yhvgn0wM9Nzuekk","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}