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Application of dilatometric analysis to the study of autoclaved calcium silicate materials

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F17%3AN0000030" target="_blank" >RIV/26232511:_____/17:N0000030 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/https://doi.org/10.1007/s10973-017-6882-3" target="_blank" >http://dx.doi.org/https://doi.org/10.1007/s10973-017-6882-3</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/https://doi.org/10.1007/s10973-017-6882-3" target="_blank" >https://doi.org/10.1007/s10973-017-6882-3</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Application of dilatometric analysis to the study of autoclaved calcium silicate materials

  • Popis výsledku v původním jazyce

    The process of shrinkage of calcium silicate hydrate was investigated by dilatometry up to 350 °C. The properties of this material are based on the formation of C–S–H phases during the reaction at temperatures between 180 and 205 °C and water vapor pressure lower than 16 bars. The main C–S–H phases are 11.3 Å tobermorite and xonotlite. 11.3 Å tobermorite converts to 9.3 Å tobermorite on air at temperatures around 300 °C. The hydrosilicate materials were prepared from quicklime and finely ground sand with different CaO/SiO2 ratios under different hydrothermal conditions. The reaction time was 24 h. Materials based on xonotlite and tobermorite were produced, and the calcium silicate phases were characterized by XRD and TG/DTA methods. Dilatometry measurements were used to study the effect of heating conditions on sample shrinkage. Dehydration of hydrated calcium silicate minerals occurred during heating. The results show that sample shrinkage is dependent on the type and amount of C–S–H phases, the amount of bound water and formation of 9.3 Å tobermorite. All samples showed shrinkage after heating up to 350 °C, but this change was not irreversible for all samples after cooling to room temperature.

  • Název v anglickém jazyce

    Application of dilatometric analysis to the study of autoclaved calcium silicate materials

  • Popis výsledku anglicky

    The process of shrinkage of calcium silicate hydrate was investigated by dilatometry up to 350 °C. The properties of this material are based on the formation of C–S–H phases during the reaction at temperatures between 180 and 205 °C and water vapor pressure lower than 16 bars. The main C–S–H phases are 11.3 Å tobermorite and xonotlite. 11.3 Å tobermorite converts to 9.3 Å tobermorite on air at temperatures around 300 °C. The hydrosilicate materials were prepared from quicklime and finely ground sand with different CaO/SiO2 ratios under different hydrothermal conditions. The reaction time was 24 h. Materials based on xonotlite and tobermorite were produced, and the calcium silicate phases were characterized by XRD and TG/DTA methods. Dilatometry measurements were used to study the effect of heating conditions on sample shrinkage. Dehydration of hydrated calcium silicate minerals occurred during heating. The results show that sample shrinkage is dependent on the type and amount of C–S–H phases, the amount of bound water and formation of 9.3 Å tobermorite. All samples showed shrinkage after heating up to 350 °C, but this change was not irreversible for all samples after cooling to room temperature.

Klasifikace

  • Druh

    J<sub>SC</sub> - Článek v periodiku v databázi SCOPUS

  • CEP obor

  • OECD FORD obor

    20500 - Materials engineering

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2017

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Journal of Thermal Analysis and Calorimetry

  • ISSN

    1588-2926

  • e-ISSN

  • Svazek periodika

  • Číslo periodika v rámci svazku

    11 December 2017

  • Stát vydavatele periodika

    NL - Nizozemsko

  • Počet stran výsledku

    6

  • Strana od-do

    1-6

  • Kód UT WoS článku

  • EID výsledku v databázi Scopus

    2-s2.0-85037716080