Publication detail

Thermal stability of the phases developed at high-pressure hydrothermal curing of class G cement with different pozzolanic and latent hydraulic additives

KUZIELOVA, E. SLANÝ, M. ŽEMLIČKA, M. ŠILER, P. MÁSILKO, J. PALOU, M.

Original Title

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

State

Hungary

Pages from

9891

Pages to

9902

Pages count

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"
}