Detail publikačního výsledku
Phase Composition of Silica Fume-Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA
KUZIELOVA, E.; SLANÝ, M.; ŽEMLIČKA, M.; MÁSILKO, J.; PALOU, M.
Original Title
Phase Composition of Silica Fume-Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA
English Title
Phase Composition of Silica Fume-Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA
Type
WoS Article
Original Abstract
Two substitution levels of Portland cement by silica fume (SF; 30 and 50 mass%) and three hydrothermal treatment regimes (0.5, 1.2, and 2 MPa and 165, 195, and 220 degrees C for 7 days, respectively) were selected for the investigation of high-temperature phase formation. A combination of thermogravimetric, X-ray diffraction, and Fourier transform infrared analyses in the mid-IR region was used to overcome the shortcomings of individual techniques for the identification of these complex systems. Changes in molecular water amounts, the polymerization degree of silicate chains, or their decomposition due to transformations and crystallization of phases at hydrothermal conditions were observed and discussed concerning composition. Contrary to the calciochondrite, hydrogrossular phases, alpha-C2SH, and jaffeite detected in the systems without SF, a decrease in CaO/SiO2 ratio resulted in the formation of stable tobermorite in the case of 30 mass% SF, whilst calcium hydrogen silicate, gyrolite, and cowlesite were identified as more thermally stable phases in the samples with 50 mass% SF.
English abstract
Two substitution levels of Portland cement by silica fume (SF; 30 and 50 mass%) and three hydrothermal treatment regimes (0.5, 1.2, and 2 MPa and 165, 195, and 220 degrees C for 7 days, respectively) were selected for the investigation of high-temperature phase formation. A combination of thermogravimetric, X-ray diffraction, and Fourier transform infrared analyses in the mid-IR region was used to overcome the shortcomings of individual techniques for the identification of these complex systems. Changes in molecular water amounts, the polymerization degree of silicate chains, or their decomposition due to transformations and crystallization of phases at hydrothermal conditions were observed and discussed concerning composition. Contrary to the calciochondrite, hydrogrossular phases, alpha-C2SH, and jaffeite detected in the systems without SF, a decrease in CaO/SiO2 ratio resulted in the formation of stable tobermorite in the case of 30 mass% SF, whilst calcium hydrogen silicate, gyrolite, and cowlesite were identified as more thermally stable phases in the samples with 50 mass% SF.
Keywords
hydrothermal curing; silica fume; FTIR
Key words in English
hydrothermal curing; silica fume; FTIR
Authors
KUZIELOVA, E.; SLANÝ, M.; ŽEMLIČKA, M.; MÁSILKO, J.; PALOU, M.
RIV year
2022
Released
24.05.2021
Publisher
MDPI
Location
BASEL
ISBN
1996-1944
Periodical
Materials
Volume
14
Number
11
State
Swiss Confederation
Pages from
1
Pages to
18
Pages count
18
URL
Full text in the Digital Library
BibTex
@article{BUT176825,
author="Eva {Kuzielova} and Michal {Slaný} and Matúš {Žemlička} and Jiří {Másilko} and Martin {Palou}",
title="Phase Composition of Silica Fume-Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA",
journal="Materials",
year="2021",
volume="14",
number="11",
pages="1--18",
doi="10.3390/ma14112786",
issn="1996-1944",
url="https://www.mdpi.com/1996-1944/14/11/2786"
}Documents