Publication detail

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

Type

journal article in Web of Science

Language

English

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.

Keywords

hydrothermal curing; silica fume; FTIR

Authors

KUZIELOVA, E.; SLANÝ, M.; ŽEMLIČKA, M.; MÁSILKO, J.; PALOU, M.

Released

24. 5. 2021

Publisher

MDPI

Location

BASEL

ISBN

1996-1944

Periodical

Materials

Year of study

14

Number

11

State

Swiss Confederation

Pages from

1

Pages to

18

Pages count

18

URL

https://www.mdpi.com/1996-1944/14/11/2786

Full text in the Digital Library

http://hdl.handle.net/11012/204075

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"
}