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Title:Quantitative in situ X-ray diffraction analysis of early hydration of belite-calcium sulfoaluminate cement at various defined temperatures
Authors:ID Mrak, Maruša (Author)
ID Lengauer, Christian L. (Author)
ID Dolenec, Sabina (Author)
Files:URL URL - Source URL, visit https://www.mdpi.com/2075-163X/11/3/297
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.pdf PDF - Presentation file, download (4,59 MB)
MD5: D11CB7BC84165BACD2976BCE8DD750F8
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:The influence of temperature on the early hydration of belite-calcium sulfoaluminate cements with two different calcium sulfate to calcium sulfoaluminate molar ratios was investigated. The phase composition and phase assemblage development of cements prepared using molar ratios of 1 and 2.5 were studied at 25, 40 and 60 ◦C by in situ X-ray powder diffraction. The Rietveld refinement method was used for quantification. The degree of hydration after 24 h was highest at ambient temperatures, but early hydration was significantly accelerated at elevated temperatures. These differences were more noticeable when we increased the temperature from 25 ◦C to 40 ◦C, than it was increased from 40 ◦C to 60 ◦C. The amount of calcium sulfate added controls the amount of the precipitated ettringite, namely, the amount of ettringite increased in the cement with a higher molar ratio. The results showed that temperature also affects full width at half maximum of ettringite peaks, which indicates a decrease in crystallite size of ettringite at elevated temperatures due to faster precipitation of ettringite. When using a calcium sulfate to calcium sulfoaluminate molar ratio of 1, higher d-values of ettringite peaks were observed at elevated temperatures, suggesting that more ions were released from the cement clinker at elevated temperatures, allowing a higher ion uptake in the ettringite structure. At a molar ratio of 2.5, less clinker is available in the cement, therefore these differences were not observed.
Keywords:in situ X-ray diffraction, hydration, temperature, cement, rietveld analysis
Publication status:Published
Publication version:Version of Record
Publication date:11.03.2021
Publisher:MDPI AG
Year of publishing:2021
Number of pages:str. 1-21
Numbering:Vol. 11, no. 3
PID:20.500.12556/DiRROS-15853 New window
UDC:620.1/.2
ISSN on article:2075-163X
DOI:10.3390/min11030297 New window
COBISS.SI-ID:54931459 New window
Copyright:© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Note:Nasl. z nasl. zaslona; Opis vira z dne 12. 3. 2021;
Publication date in DiRROS:26.06.2023
Views:780
Downloads:441
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MRAK, Maruša, LENGAUER, Christian L. and DOLENEC, Sabina, 2021, Quantitative in situ X-ray diffraction analysis of early hydration of belite-calcium sulfoaluminate cement at various defined temperatures. Minerals [online]. 2021. Vol. 11, no. 3, p. 1–21. [Accessed 16 March 2025]. DOI 10.3390/min11030297. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=15853
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Record is a part of a journal

Title:Minerals
Shortened title:Minerals
Publisher:MDPI AG
ISSN:2075-163X
COBISS.SI-ID:519985177 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:1000-18-1502
Name:Young researcher program
Funder:Other - Other funder or multiple funders
Project number:BI-AT/18-19-014
Name:Effect of clinkering process on the mineralogy of belite-sulfoaluminate cement clinker

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:in situ rentgenska difrakcija, hidratacija, temperatura, cement, rietveldova analiza


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