The nanomechanical properties of non-crosslinked calcium aluminosilicate hydrate: The influences of tetrahedral Al and curing age
| hal.structure.identifier | Atmospheric, Earth and Energy Division [AEED] | |
| dc.contributor.author | LI, Jiaqi | |
| hal.structure.identifier | Caltech Division of Engineering and Applied Science | |
| dc.contributor.author | ZHANG, Wenxin | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | SANZ CAMACHO, Paula | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DUTTINE, Mathieu | |
| hal.structure.identifier | Department of Chemical and Biomolecular Engineering [Los Angeles] | |
| dc.contributor.author | GARDNER, David | |
| hal.structure.identifier | Department of Chemical and Biomolecular Engineering [Los Angeles] | |
| dc.contributor.author | CARRARO, Carlo | |
| hal.structure.identifier | Department of Chemical and Biomolecular Engineering [Los Angeles] | |
| dc.contributor.author | MABOUDIAN, Roya | |
| hal.structure.identifier | Laboratory for Neutron Scattering and Imaging [Paul Scherrer Institute] [LNS] | |
| dc.contributor.author | HUTHWELKER, Thomas | |
| dc.date.issued | 2022 | |
| dc.identifier.issn | 0008-8846 | |
| dc.description.abstractEn | Calcium aluminosilicate hydrate (C-A-S-H) is the binding phase of both blended cement-based and alkali-activated materials. The intrinsic mechanical properties of non-cross-linked C-A-S-H are important while experimentally unvalidated. Here, the properties are for the first time measured using high-pressure X-ray diffraction. The incompressibility and bulk modulus K0 of C-A-S-Hs are correlated to their nanostructure and stability using nuclear magnetic resonance and X-ray absorption spectroscopies. Al coordination in stable C-A-S-H (Al/Si = 0.1) cured for 546 days is purely tetrahedral (AlIV), while in metastable C-A-S-H (Al/Si = 0.05) cured for only 182 days is both AlIV and pentahedral (AlV). The stable C-A-S-H is stiffer along the a,b,c-axis with higher K0 relative to C-S-H. Short-curing-induced metastable C-A-S-H (Al/Si = 0.05) shows expanded interlayer and softer c-axis, thus lower K0 than C-S-H and the stable C-A-S-H. Our results highlight the stiffening effect of AlIV incorporation and the negative influences of insufficient curing on the nanomechanical properties of non-cross-linked C-A-S-H at Ca/Si = 1. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.title.en | The nanomechanical properties of non-crosslinked calcium aluminosilicate hydrate: The influences of tetrahedral Al and curing age | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.cemconres.2022.106900 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Cement and Concrete Research | |
| bordeaux.page | 106900 (8 p.) | |
| bordeaux.volume | 159 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03727677 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03727677v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Cement%20and%20Concrete%20Research&rft.date=2022&rft.volume=159&rft.spage=106900%20(8%20p.)&rft.epage=106900%20(8%20p.)&rft.eissn=0008-8846&rft.issn=0008-8846&rft.au=LI,%20Jiaqi&ZHANG,%20Wenxin&SANZ%20CAMACHO,%20Paula&DUTTINE,%20Mathieu&GARDNER,%20David&rft.genre=article |
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