Early and middle stages of multicomponent cement hydration under the effect of geothermal water and increased temperatures
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F23%3APU146973" target="_blank" >RIV/00216305:26310/23:PU146973 - isvavai.cz</a>
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0375650522002772" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0375650522002772</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.geothermics.2022.102632" target="_blank" >10.1016/j.geothermics.2022.102632</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Early and middle stages of multicomponent cement hydration under the effect of geothermal water and increased temperatures
Popis výsledku v původním jazyce
The study of early and middle stages of hydration in the systems composed of Portland cement Class G (PC) - silica fume (SF) - metakaolin (MK) and PC - SF - blast furnace slag (BFS) was performed by Isothermal calorimetry, Thermogravimetric, X-ray diffraction, and Fourier Transform Infrared analyses in the mid-IR region. The influence of composition, temperature (25, 60, and 80 degrees C), and hydration media (water and geothermal solution) was investigated. Geothermal solution delayed main hydration, however, considering the times of the calorimetric maxima at 25 degrees C, it led to the formation of hydration products with more polymerized structures in larger amounts than during the hydration process using water. At higher temperatures, the deceleration effect of the geothermal solution became less evident, nevertheless higher degree of silica polymerization and more hydration products were found in samples that were hydrated in water. Regardless of the hydration temperature, the hydration carried out in geothermal solution became more effective already after 40 h. The effect of fine additives advanced by higher temperatures resulted in accelerated hydration represented by faster depletion of gypsum. The presence of SO4-AFm and CO3-AFm phases was confirmed during the deceleration period of the hydration process using water and geothermal solution, respectively.
Název v anglickém jazyce
Early and middle stages of multicomponent cement hydration under the effect of geothermal water and increased temperatures
Popis výsledku anglicky
The study of early and middle stages of hydration in the systems composed of Portland cement Class G (PC) - silica fume (SF) - metakaolin (MK) and PC - SF - blast furnace slag (BFS) was performed by Isothermal calorimetry, Thermogravimetric, X-ray diffraction, and Fourier Transform Infrared analyses in the mid-IR region. The influence of composition, temperature (25, 60, and 80 degrees C), and hydration media (water and geothermal solution) was investigated. Geothermal solution delayed main hydration, however, considering the times of the calorimetric maxima at 25 degrees C, it led to the formation of hydration products with more polymerized structures in larger amounts than during the hydration process using water. At higher temperatures, the deceleration effect of the geothermal solution became less evident, nevertheless higher degree of silica polymerization and more hydration products were found in samples that were hydrated in water. Regardless of the hydration temperature, the hydration carried out in geothermal solution became more effective already after 40 h. The effect of fine additives advanced by higher temperatures resulted in accelerated hydration represented by faster depletion of gypsum. The presence of SO4-AFm and CO3-AFm phases was confirmed during the deceleration period of the hydration process using water and geothermal solution, respectively.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
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OECD FORD obor
10500 - Earth and related environmental sciences
Návaznosti výsledku
Projekt
<a href="/cs/project/GA19-16646S" target="_blank" >GA19-16646S: Potlačení negativního vlivu zinku v Portlandském cementu pomocí akcelerátorů hydratace</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
GEOTHERMICS
ISSN
0375-6505
e-ISSN
1879-3576
Svazek periodika
108
Číslo periodika v rámci svazku
únor
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
13
Strana od-do
„“-„“
Kód UT WoS článku
000899990600004
EID výsledku v databázi Scopus
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