Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis of Portland Cement as a Function of Age

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00239388" target="_blank" >RIV/68407700:21110/16:00239388 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10765-015-2028-7" target="_blank" >http://dx.doi.org/10.1007/s10765-015-2028-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10765-015-2028-7" target="_blank" >10.1007/s10765-015-2028-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis of Portland Cement as a Function of Age

Popis výsledku v původním jazyce

We study the hydration and pozzolanic reactions of an ordinary Portland cement as a function of age, using the differential scanning calorimetry and thermogravimetry. The measurements are done for 2 days, 7 days, 28 days, 90 days, 180 days, and 360 days cured samples in order to monitor the rate of hydration. The investigation is performed in the temperature range from 25 °C to 1000 °C with a heating rate 5 °C-min-1 in an argon atmosphere. The temperature, enthalpy, and mass change during the decomposition of calcium silicate hydrate gels, ettringite, portlandite, vaterite, and calcite are determined, and the changes in the portlandite amount are estimated in dependence on the time of hydration.We found out that the temperature and enthalpy of liberation of physically bound water, C–S–H gels and ettringite decomposition (all occurring from 50 °C to 250 °C) and Portlandite decomposition (420 °C to 530 °C) decrease with hydration time of studied samples. On the other hand, vaterite and calcite decomposition (530 °C to 850 °C) the temperature varies and the enthalpy increases with hydration time of samples.

Název v anglickém jazyce

Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis of Portland Cement as a Function of Age

Popis výsledku anglicky

We study the hydration and pozzolanic reactions of an ordinary Portland cement as a function of age, using the differential scanning calorimetry and thermogravimetry. The measurements are done for 2 days, 7 days, 28 days, 90 days, 180 days, and 360 days cured samples in order to monitor the rate of hydration. The investigation is performed in the temperature range from 25 °C to 1000 °C with a heating rate 5 °C-min-1 in an argon atmosphere. The temperature, enthalpy, and mass change during the decomposition of calcium silicate hydrate gels, ettringite, portlandite, vaterite, and calcite are determined, and the changes in the portlandite amount are estimated in dependence on the time of hydration.We found out that the temperature and enthalpy of liberation of physically bound water, C–S–H gels and ettringite decomposition (all occurring from 50 °C to 250 °C) and Portlandite decomposition (420 °C to 530 °C) decrease with hydration time of studied samples. On the other hand, vaterite and calcite decomposition (530 °C to 850 °C) the temperature varies and the enthalpy increases with hydration time of samples.

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

2016

Kód důvěrnosti údajů

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

Název periodika

International Journal of Thermophysics

ISSN

0195-928X

e-ISSN

—

Svazek periodika

37

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000368053200012

EID výsledku v databázi Scopus

2-s2.0-84952916068