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KUZIELOVA, E. SLANÝ, M. ŽEMLIČKA, M. ŠILER, P. MÁSILKO, J. PALOU, M.
Original Title
Thermal stability of the phases developed at high-pressure hydrothermal curing of class G cement with different pozzolanic and latent hydraulic additives
Type
journal article in Web of Science
Language
English
Original Abstract
Multicomponent cement pastes based on the Class G cement substituted by 30 mass% of binary or ternary mixtures of silica fume (SF), metakaolin (MK), and ground granulated blast-furnace slag (BFS) were submitted to hydrothermal curing at 150 degrees C and 18 MPa for 7 days. X-ray diffraction (XRD), Fourier Transform Infrared analyses in the mid-IR region (FTIR), and thermogravimetric-differential scanning calorimetry (TGA/DSC) were performed for evaluation of phase compositions and to assess their relation to compressive strength. The highest amount of mainly amorphous thermal stable C-S-H and C-A-(S)-H phases with the highest polymerization degree was formed by using 15 mass% SF-15 mass% MK mixture, which led to the lowest CaO/SiO2 (C/S) ratio and the highest compressive strength. Crystalline phases detected in this sample were also thermal stable tobermorite, hibschite, and katoite. The increase in the C/S ratio, as well as slowly reacting BFS, resulted in the transformation of polymerized structures of hydration products to the smaller units and lower degree of hydration followed by decreased compressive strength values. Undesired formation of crystalline alpha-C2SH, occurring also in the paste without additives addition, was proved in the composition with a higher amount of BFS and higher C/S ratio.
Keywords
Hydrothermal curing; Silica fume; Metakaolin; Ground granulated blast-furnace slag; FTIR; TG-DSC
Authors
KUZIELOVA, E.; SLANÝ, M.; ŽEMLIČKA, M.; ŠILER, P.; MÁSILKO, J.; PALOU, M.
Released
21. 2. 2022
Publisher
SPRINGER
Location
DORDRECHT
ISBN
1588-2926
Periodical
Journal of Thermal Analysis and Calorimetry
Year of study
147
Number
18
State
Hungary
Pages from
9891
Pages to
9902
Pages count
12
URL
https://link.springer.com/article/10.1007/s10973-022-11254-2
BibTex
@article{BUT181442, author="Eva {Kuzielova} and Michal {Slaný} and Matúš {Žemlička} and Pavel {Šiler} and Jiří {Másilko} and Martin {Palou}", title="Thermal stability of the phases developed at high-pressure hydrothermal curing of class G cement with different pozzolanic and latent hydraulic additives", journal="Journal of Thermal Analysis and Calorimetry", year="2022", volume="147", number="18", pages="9891--9902", doi="10.1007/s10973-022-11254-2", issn="1588-2926", url="https://link.springer.com/article/10.1007/s10973-022-11254-2" }