An isothermal heat flow calorimeter for large-volume applications

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00196922" target="_blank" >RIV/68407700:21110/12:00196922 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10973-011-1907-9" target="_blank" >http://dx.doi.org/10.1007/s10973-011-1907-9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-011-1907-9" target="_blank" >10.1007/s10973-011-1907-9</a>

Result language
angličtina
Original language name
An isothermal heat flow calorimeter for large-volume applications
Original language description
Design, construction, calibration, and testing of a new isothermal heat flow calorimeter suitable for investigation of large-volume specimens are presented. The measuring vessel has the volume of 1370 cm3, and the calorimeter allows for the measurement at surrounding air temperatures of 5-60 C. A practical application of the device is demonstrated at the determination of specific hydration heat of cement paste and concrete with silicaaggregate size of up to 16 mm, having the same water/ cement ratio. The differences over the whole measuring time period of about 100 h are lower than 2% which indicates a good potential of the calorimeter for the measurement of total hydration heat of composite materials. A reference measurement of hydration heat of cement paste using common isothermal heat flow calorimeter with the measuring vessel of 1 cm3 shows an agreement within ?7%, which seems acceptable, taking into account the heat transport processes in the far larger specimens. The designed cal
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JI - Composite materials
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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