Publication detail

The synthesis and characterization of an expansive admixture for M-type cements I. The influence of free CaO to the formation of ettringite

OPRAVIL, T. PTÁČEK, P. ŠOUKAL, F. HAVLICA, J. BRANDŠTETR, J.

Original Title

Type

journal article - other

Language

English

Original Abstract

The hydration process of expansive admixtures for M-type of expansive or shrinkage compensation cements was studied by thermal analysis supplemented by infrared spectroscopy and X-ray diffraction. The main attention was focused on ettringite formation and on the influence of lime content upon the process. The behaviour of expansive admixture during hydration is significantly affected by the content of lime. The increasing content of lime slows down the rate of ettringite formation and supports the formation of monosulphate (AFm phase) that can be transformed afterwards into ettringite during hardening process. This process may produce better expansion effect because of better transfer of expansion stress after the setting of the paste

Keywords

Expansive admixture, Expansive additives, Anhydrite, Ettringite, Monosulphate.

Authors

OPRAVIL, T.; PTÁČEK, P.; ŠOUKAL, F.; HAVLICA, J.; BRANDŠTETR, J.

RIV year

2012

Released

18. 7. 2012

Publisher

Springer Netherlands

Location

Maďarská republika

ISBN

1388-6150

Periodical

Journal of Thermal Analysis and Calorimetry

Year of study

2012

Number

State

Hungary

Pages from

Pages to

Pages count

BibTex

@article{BUT95628,
  author="Tomáš {Opravil} and Petr {Ptáček} and František {Šoukal} and Jaromír {Havlica} and Jiří {Brandštetr}",
  title="The synthesis and characterization of an expansive admixture for M-type cements I. The influence of free CaO to the formation of ettringite",
  journal="Journal of Thermal Analysis and Calorimetry",
  year="2012",
  volume="2012",
  number="7",
  pages="1--10",
  issn="1388-6150"
}