Application of large-volume calorimetry for monitoring the early-stage hydration heat development in cement-based composites as a function of w/c

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00194302" target="_blank" >RIV/68407700:21110/12:00194302 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.tca.2012.07.028" target="_blank" >http://dx.doi.org/10.1016/j.tca.2012.07.028</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tca.2012.07.028" target="_blank" >10.1016/j.tca.2012.07.028</a>

Result language
angličtina
Original language name
Application of large-volume calorimetry for monitoring the early-stage hydration heat development in cement-based composites as a function of w/c
Original language description
Early-stage hydration heat development in Portland cement paste and cement mortar is studied as a function of w/c within a range of 0.35 to 0.60, using a recently developed large-volume isothermal heat flow calorimeter. Experimental results show that thespecific hydration heat of cement paste, Qcp, varies little and irregularly with changing w/c but a systematic increase in the specific hydration heat of cement mortar, Qcm, with increasing w/c is observed, the differences being within a 3-5 % range. While for the lowest w/c of 0.35 Qcm is almost identical to the cement paste, for higher w/c Qcm is always higher than Qcp and the differences increase with the increasing w/c; for w/c = 0.6 they are within a range of 5-7 % over the time period of 48 hours. The differences in the specific hydration heats of cement mortar and cement paste can be attributed to the siliceous sand in cement mortar which contains a relatively high amount of fine particles which are capable of stimulating the hy
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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Project
<a href="/en/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Cumulative time dependent processes in building materials and structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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