Effect of Latex Particles Addition on the Rheological Behavior of Concentrated Silica Suspensions Used as Cement Pastes Model Systems
The studied model silica suspensions present the same rheological as cement pastes, especially a sharp transition between a gel behaviour and a liquid behaviour when the shear stress is increased. This rheological behaviour can be explained by the percolation or the breakup of aggregates. Adding a p...
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| Published in | The XVth International Congress on Rheology Part One (AIP Conference Proceedings Volume 1027, Part 1) Vol. 1027; pp. 719 - 721 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
01.01.2008
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| Online Access | Get full text |
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| Summary: | The studied model silica suspensions present the same rheological as cement pastes, especially a sharp transition between a gel behaviour and a liquid behaviour when the shear stress is increased. This rheological behaviour can be explained by the percolation or the breakup of aggregates. Adding a polymer redispersible powder does not modify qualitatively this rheological behaviour. But replacing silica particles (or cement) by polymer ones induces in the gel state a decrease of the storage modulus and in the liquid state a decrease of the viscosity. The decrease of the storage modulus might be due to the lower interactions between polymer and silica particles than the ones between silica particles; the decrease of the viscosity might be linked to the fact that, as polymer particles are less hydrophilic than silica ones, they entrap less water within the aggregates. |
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| Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
| ISBN: | 0735405492 9780735405493 |
| ISSN: | 0094-243X |
| DOI: | 10.1063/1.2964822 |