Publication detail

The hydration of calcium aluminates phases at low temperatures (5 °C, 10 °C, 15 °C)

KOPLÍK, J. NOVOTNÝ, R. MÁSILKO, J. ŠVEC, J.

Original Title

The hydration of calcium aluminates phases at low temperatures (5 °C, 10 °C, 15 °C)

English Title

The hydration of calcium aluminates phases at low temperatures (5 °C, 10 °C, 15 °C)

Type

conference paper

Language

en

Original Abstract

The paper is focused on the hydration of the calcium aluminate phases at low temperatures. Monocalcium aluminate (CA), monocalcium dialuminate (CA2), dodecacalcium heptaaluminte (C12A7) and tricalcium aluminate (C3A) were prepared by sintering stoichiometric ratios of CaCO3 and Al2O3 at high temperatures. The hydration was performed at three temperatures (5 °C, 10 °C and 15 °C) for 50 hours. The course of hydration was measured by isothermal calorimetry. The hydration products were characterized by X-ray diffraction (XRD) and combined differential thermal analysis - thermogravimetry (DTA-TG). The reactivity of phases decreased with higher content of alumina from C3A to CA2. The main hydration product of CA2 and CA was CAH10 at all temperatures. C3A and C12A7 created various hydration products, which depended on the temperature.

English abstract

The paper is focused on the hydration of the calcium aluminate phases at low temperatures. Monocalcium aluminate (CA), monocalcium dialuminate (CA2), dodecacalcium heptaaluminte (C12A7) and tricalcium aluminate (C3A) were prepared by sintering stoichiometric ratios of CaCO3 and Al2O3 at high temperatures. The hydration was performed at three temperatures (5 °C, 10 °C and 15 °C) for 50 hours. The course of hydration was measured by isothermal calorimetry. The hydration products were characterized by X-ray diffraction (XRD) and combined differential thermal analysis - thermogravimetry (DTA-TG). The reactivity of phases decreased with higher content of alumina from C3A to CA2. The main hydration product of CA2 and CA was CAH10 at all temperatures. C3A and C12A7 created various hydration products, which depended on the temperature.

Keywords

calcium aluminate phases, low temperatures, calorimetry

Released

16.09.2019

Publisher

Research Institute of Binding Materials Prague

Location

Prague

ISBN

2523-935X

Periodical

5th International Congress on the Chemistry of Cement (ICCC 2019) Congress proceedings – Papers and Posters Proceedings

State

CZ

Pages from

-

Pages to

-

Pages count

7

Documents

BibTex


@inproceedings{BUT162123,
  author="Jan {Koplík} and Radoslav {Novotný} and Jiří {Másilko} and Jiří {Švec}",
  title="The hydration of calcium aluminates phases at low temperatures (5 °C, 10 °C, 15 °C)",
  annote="The paper is focused on the hydration of the calcium aluminate phases at low temperatures. Monocalcium aluminate (CA), monocalcium dialuminate (CA2), dodecacalcium heptaaluminte (C12A7) and tricalcium aluminate (C3A) were prepared by sintering stoichiometric ratios of CaCO3 and Al2O3 at high temperatures. The hydration was performed at three temperatures (5 °C, 10 °C and 15 °C) for 50 hours. The course of hydration was measured by isothermal calorimetry. The hydration products were characterized by X-ray diffraction (XRD) and combined differential thermal analysis - thermogravimetry (DTA-TG). The reactivity of phases decreased with higher content of alumina from C3A to CA2. The main hydration product of CA2 and CA was CAH10 at all temperatures. C3A and C12A7 created various hydration products, which depended on the temperature.",
  address="Research Institute of Binding Materials Prague",
  booktitle="PAPERS AND POSTERS PROCEEDINGS: 15th International Congress on the Chemistry of Cement",
  chapter="162123",
  howpublished="online",
  institution="Research Institute of Binding Materials Prague",
  year="2019",
  month="september",
  pages="----",
  publisher="Research Institute of Binding Materials Prague",
  type="conference paper"
}