| Download | - View accepted manuscript: Detection of nanostructural anomalies in hydrated cement systems (PDF, 579 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.cemconcomp.2006.10.006 |
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| Author | Search for: Beaudoin, J. J.1; Search for: Alizadeh, R.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Research in Construction
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| Format | Text, Article |
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| Subject | cement systems, nanostructure, anomalies, helium in flow; Cement/Concrete |
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| Abstract | Monitoring the flow of helium gas into the structure of hydrated cement systems has proven to be a useful method for following nanostructural changes in the C-S-H phase of hydrated cement systems. The method is sensitive to changes that occur on removal of structural water from the layered silicates. The helium inflow method was applied, in this study, to normally hydrated low-water-cement ratio (w/c) Portland cement pastes (w/c< 0.35) and to low w/c autoclaved cement systems containing fly ash and elemental sulfur. Nanostructural differences for the low w/c preparations were observed consistent with published structural models of layered C-S-H. Arguments for the existence of 'trapped' space between aggregates of C-S-H layers are advanced. Evidence for the preservation of C-S-H structures (similar to those formed during normal hydration) for the autoclaved systems containing fly ash and sulfur is presented. The evidence is compatible with the existence of 'trapped' space within layered agglomerates and the collapse of C-S-H structure on removal of water, typical of normally hydrated pastes. |
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| Publication date | 2007-02-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 46661
NRC-IRC-18022 |
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| NPARC number | 20378286 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 70b71f45-8065-4f64-af58-d5f26f510a15 |
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| Record created | 2012-07-24 |
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| Record modified | 2020-05-10 |
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