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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

—

Svazek periodika

546

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

44-48

Kód UT WoS článku

000309299500006

EID výsledku v databázi Scopus

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