Publication detail

The influence of different starting conditions to the hydrothermal formation of tobermorite - influence of silica source and water-to-solid ratio

GALVÁNKOVÁ, L. BARTONÍČKOVÁ, E. OPRAVIL, T.

Original Title

The influence of different starting conditions to the hydrothermal formation of tobermorite - influence of silica source and water-to-solid ratio

English Title

The influence of different starting conditions to the hydrothermal formation of tobermorite - influence of silica source and water-to-solid ratio

Type

conference paper

Language

en

Original Abstract

In this study, the influence of different starting materials, especially the silica source was studied. Hydrothermal reactions were performed at 180 °C under saturated steam pressure, while the reaction time was three days and C/S ratio of the starting mixture was set to 0.83. For the synthesis of tobermorite, the crystalline silica source with finer particles is favourable. After three days of reaction using silica sand Dorsilit (d50 = 5.3 µm) and w/s ratio in the range 2–5 ml/g tobermorite is the main detected phase in the samples. When amorphous silica sources (industrially prepared micro silica and self-synthesised SixOyOHz from TEOS) were used as starting materials, other C–S–H phases like gyrolite, hillebrandite and clinotobermorite were prepared.

English abstract

In this study, the influence of different starting materials, especially the silica source was studied. Hydrothermal reactions were performed at 180 °C under saturated steam pressure, while the reaction time was three days and C/S ratio of the starting mixture was set to 0.83. For the synthesis of tobermorite, the crystalline silica source with finer particles is favourable. After three days of reaction using silica sand Dorsilit (d50 = 5.3 µm) and w/s ratio in the range 2–5 ml/g tobermorite is the main detected phase in the samples. When amorphous silica sources (industrially prepared micro silica and self-synthesised SixOyOHz from TEOS) were used as starting materials, other C–S–H phases like gyrolite, hillebrandite and clinotobermorite were prepared.

Keywords

silica source, tobermorite, hydrothermal synthesis

Released

16.09.2019

Publisher

Research Institute of Binding Materials Prague

Location

Praha

ISBN

2523-935X

Periodical

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

State

CZ

Pages from

1

Pages to

11

Pages count

11

Documents

BibTex


@inproceedings{BUT157476,
  author="Lucie {Dlabajová} and Eva {Bartoníčková} and Tomáš {Opravil}",
  title="The influence of different starting conditions to the hydrothermal formation of tobermorite - influence of silica source and water-to-solid ratio",
  annote="In this study, the influence of different starting materials, especially the silica source was studied. Hydrothermal reactions were performed at 180 °C under saturated steam pressure, while the reaction time was three days and C/S ratio of the starting mixture was set to 0.83. For the synthesis of tobermorite, the crystalline silica source with finer particles is favourable. After three days of reaction using silica sand Dorsilit (d50 = 5.3 µm) and w/s ratio in the range 2–5 ml/g tobermorite is the main detected phase in the samples. When amorphous silica sources (industrially prepared micro silica and self-synthesised SixOyOHz from TEOS) were used as starting materials, other C–S–H phases like gyrolite, hillebrandite and clinotobermorite were prepared.",
  address="Research Institute of Binding Materials Prague",
  booktitle="15th International Congress on the Chemistry of Cement (ICCC 2019)
Congress proceedings – Papers and Posters Proceedings",
  chapter="157476",
  edition="first edition",
  howpublished="online",
  institution="Research Institute of Binding Materials Prague",
  year="2019",
  month="september",
  pages="1--11",
  publisher="Research Institute of Binding Materials Prague",
  type="conference paper"
}