R&D result detail

Original Title

Hydration of Calcium Aluminate Phases at Different Temperatures

English Title

Hydration of Calcium Aluminate Phases at Different Temperatures

Type

Paper in proceedings (conference paper)

Original Abstract

Mayenite (C12A7) and calcium dialuminate (CA2) are both components of Calcium aluminate Cement (CAC). The hydration of these phases depends on initial conditions especially on the temperature. Pure phases were synthesized by solid-state reaction. The hydration was carried out at three different temperatures – 20 C, 30 C and 60 C. The course of hydration was investigated by isothermal calorimetry. The results prove, that higher temperature increase reactivity of phases and decrease their initial period of hydration. The X-ray diffraction analysis (XRD) identified the hydration products of CA2 as katoite (C3AH6) and gibbsite (AH3). The hydration products of C12A7 depends on the temperature. At 20 C the major products are C2AH8 and CAH10. At 30 C CAH10 disappears and only C2AH8 remains. At 60 C the only stable hydrates – C3AH6 and AH3 are formed.

English abstract

Mayenite (C12A7) and calcium dialuminate (CA2) are both components of Calcium aluminate Cement (CAC). The hydration of these phases depends on initial conditions especially on the temperature. Pure phases were synthesized by solid-state reaction. The hydration was carried out at three different temperatures – 20 C, 30 C and 60 C. The course of hydration was investigated by isothermal calorimetry. The results prove, that higher temperature increase reactivity of phases and decrease their initial period of hydration. The X-ray diffraction analysis (XRD) identified the hydration products of CA2 as katoite (C3AH6) and gibbsite (AH3). The hydration products of C12A7 depends on the temperature. At 20 C the major products are C2AH8 and CAH10. At 30 C CAH10 disappears and only C2AH8 remains. At 60 C the only stable hydrates – C3AH6 and AH3 are formed.

Keywords

C12A7, CA2, Calcium Aluminate Phase, Hydration

Key words in English

C12A7, CA2, Calcium Aluminate Phase, Hydration

Authors

KOPLÍK, J.; NOVOTNÝ, R.; TOMALA, L.

RIV year

2017

Released

11.08.2014

Publisher

Trans Tech Publications

Location

Switzerland

Book

Ecology and New Building Materials and Products

ISBN

1022-6680

Periodical

Advanced Materials Research

Volume

2014

Number

1000

State

Swiss Confederation

Pages from

24

Pages to

27

Pages count

4

BibTex

@inproceedings{BUT108701,
  author="Jan {Koplík} and Radoslav {Novotný} and Libor {Tomala}",
  title="Hydration of Calcium Aluminate Phases at Different Temperatures",
  booktitle="Ecology and New Building Materials and Products",
  year="2014",
  journal="Advanced Materials Research",
  volume="2014",
  number="1000",
  pages="24--27",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/AMR.1000.24",
  issn="1022-6680"
}