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"
}