Thermal Properties of Hydrating Calcium Aluminate Cement Pastes
As the hydration of calcium aluminate cements (CAC) is highly temperature dependent, yielding morphologically and structurally different hydration products that continuously alter material properties, a good knowledge of thermal properties at early stages of hydration is essential. Thermal diffusivity and thermal conductivity during CAC hydration was investigated by a transient method with a numerical approach and a transient hot wire method, respectively. For hydration at 15 °C (formation of mainly CAH-sub-10), thermal diffusivity shows a linear decrease as a function of hydration degree, while for hydration at 30 °C there is a linear increase of thermal diffusivity. Converted materials exhibited the highest values of thermal diffusivities. The results on sealed converted material indicated that thermal conductivity increased with an increase in temperature (20-80°C), while thermal diffusivities marginally decreased with temperature. The Hashin-Shtrikman boundary conditions and a simple law of mixtures were successfully applied for estimating thermal conductivity and heat capacity, respectively, of fresh cement pastes.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
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Supplemental Notes:
- Abstract reprinted with permission from Elsevier
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Authors:
- Ukrainczyk, Neven
- Matusinovic, Tomislav
- Publication Date: 2010-1
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 128-136
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Serial:
- Cement and Concrete Research
- Volume: 40
- Issue Number: 1
- Publisher: Elsevier
- ISSN: 0008-8846
- Serial URL: http://www.sciencedirect.com/science/journal/00088846
Subject/Index Terms
- TRT Terms: Cement paste; Hydration; Thermal properties
- Uncontrolled Terms: Calcium aluminate
- Subject Areas: Highways; Materials; I35: Miscellaneous Materials;
Filing Info
- Accession Number: 01148046
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 25 2010 8:07AM