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Title:The influence of calcium sulfate content on the hydration of belite-calcium sulfoaluminate cements with different clinker phase compositions
Authors:ID Mrak, Maruša (Author)
ID Winnefeld, Frank (Author)
ID Lothenbach, Barbara (Author)
ID Dolenec, Sabina (Author)
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URL URL - Source URL, visit http://dx.doi.org/10.1617/s11527-021-01811-w
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:The influence of different amounts of gypsum on the hydration of a belite-rich and a yeʼelimite-rich belite-calcium sulfoaluminate clinker (BCSA) was investigated. The hydration kinetics, phase assemblages and compressive strength development of cements prepared using yeʼelimite/ calcium sulfate molar ratios of 1, 1.5 and 2 were studied. Besides ettringite and monosulfate, aluminium hydroxide, strätlingite, C-S-H, iron-containing siliceous hydrogarnet and hydrotalcite were present as hydration products. Increasing the amount of gypsum increased the ratio of ettringite to monosulfate formed in the cement paste, lowered the amount of pore solution, delayed the dissolution of belite and ferrite, decreased the formation of strätlingite and, in the case of the yeʼelimite-rich BCSA, led to an increase in compressive strength. Increased amounts of belite in the clinker led to the formation of higher quantities of C-S-H, at the expense of straätlingite and a lower compressive strength, as belite has a lower degree of reaction than yeʼelimite and due to the formation of more C-S-H and stratlingite compared to the more space-filling ettringite. The thermodynamic model established for BCSA cement hydration agrees well with the experimental data. Compressive strength directly correlated with bound water from thermogravimetric analyses and inversely correlated with the porosity calculated from thermodynamic modelling.
Keywords:belite-calcium sulfoaluminate cement, gypsum, hydration, thermodynamic modelling
Publication status:Published
Publication version:Version of Record
Publication date:05.11.2021
Publisher:Springer Netherlands
Year of publishing:2021
Number of pages:str. 1-17
Numbering:Vol. 54
PID:20.500.12556/DiRROS-16159 New window
UDC:620.1/.2
ISSN on article:1871-6873
DOI:10.1617/s11527-021-01811-w New window
COBISS.SI-ID:84002051 New window
Copyright:© The Author(s) 2021
Note:Article no.: 212;
Publication date in DiRROS:28.07.2023
Views:773
Downloads:639
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MRAK, Maruša, WINNEFELD, Frank, LOTHENBACH, Barbara and DOLENEC, Sabina, 2021, The influence of calcium sulfate content on the hydration of belite-calcium sulfoaluminate cements with different clinker phase compositions. Materials and structures [online]. 2021. Vol. 54, p. 1–17. [Accessed 16 March 2025]. DOI 10.1617/s11527-021-01811-w. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=16159
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Record is a part of a journal

Title:Materials and structures
Publisher:Springer Netherlands
ISSN:1871-6873
COBISS.SI-ID:517631513 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:1000-18-1502
Name:Young researcher programm

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.
Licensing start date:05.11.2021
Applies to:Text and Data Mining valid from 2021-11-05 Version of Record valid from 2021-11-05

Secondary language

Language:Slovenian
Keywords:belitno-kalcijevo sulfoaluminatni cement, sadra, hidratacija, termodinamsko modeliranje


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