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hal.structure.identifierInstitut de Recherche sur les CERamiques [IRCER]
hal.structure.identifierLaboratory of Applied Inorganic Chemistry
dc.contributor.authorKAZE, Cyriaque Rodrigue
hal.structure.identifierInstitut de Recherche sur les CERamiques [IRCER]
dc.contributor.authorLECOMTE-NANA, Gisèle Laure
hal.structure.identifierMINRESI/MIPROMALO
dc.contributor.authorKAMSEU, Elie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSANZ CAMACHO, Paula
hal.structure.identifierDepartment of Materials Science and Engineering [Sheffield]
dc.contributor.authorYORKSHIRE, Antonia
hal.structure.identifierDepartment of Materials Science and Engineering [Sheffield]
dc.contributor.authorPROVIS, John
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierLaboratory of Applied Inorganic Chemistry
dc.contributor.authorMELO, Uphie Chinje
dc.date.issued2021-02
dc.identifier.issn0008-8846
dc.description.abstractEnIn this work, two different laterites (iron contents of 13.07 and 49.34 wt%, respectively, for lateritic clay, LAC, and iron-rich laterite, LAI) were selected and calcined at 600 °C. The obtained calcined laterites, namely LAI600 and LAC600, were separately mixed with an alkaline solution (silicate modulus of 1.35) or an acidic solution (phosphoric acid solution at pH ≤ 2) for the synthesis of inorganic polymer products. The fabricated products were cured at 20 °C (ambient) and 40 °C (oven). The obtained results showed that the compressive strength of each series of alkaline-based inorganic polymer binder increased with ageing time (7 and 28 days) for room temperature curing, while the reverse trend was noted for oven-cured specimens. The best mechanical performance was obtained when using a phosphoric acid solution, 38 and 52 ± 1 MPa; 62 and 65 ± 1 MPa at 28 days for LAC and LAI respectively. It appeared that a higher iron content within the laterite contributed to an increase in the compressive strength under acidic conditions (LAI (59 MPa) > LAC (48 MPa)) compared to the behavior obtained under alkaline conditions (LAI (6 MPa) < LAC (29 MPa)). Accordingly, the acidic products exhibited a dense structure (with lower porosity) and contained amorphous iron/aluminium phosphate phases such as berlinite (FePO4), iron hydrogen phosphate hydrate (Fe3H15(PO4)8·4H2O), ferrowyllieite (AlFe2Na2(PO4)3) and sodium iron phosphate (Na3Fe2(PO4)3) arising from the alteration of iron minerals in an acidic medium, confirmed by Mössbauer spectroscopy and electron paramagnetic resonance spectroscopy.
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subject.enLaterite
dc.subject.enSodium silicate
dc.subject.enPhosphoric acid
dc.subject.enInorganic polymer cement
dc.subject.enMechanical properties
dc.subject.enElectron paramagnetic resonance
dc.subject.en57Fe Mössbauer spectroscopy
dc.title.enMechanical and physical properties of inorganic polymer cement made of iron-rich laterite and lateritic clay: A comparative study
dc.typeArticle de revue
dc.identifier.doi10.1016/j.cemconres.2020.106320
dc.subject.halChimie/Matériaux
bordeaux.journalCement and Concrete Research
bordeaux.page106320 (15 p.)
bordeaux.volume140
bordeaux.peerReviewedoui
hal.identifierhal-03053919
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03053919v1
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