The Influence of Silica Species Configuration on the Hydration of Alkali-Activated Ground Granulated Blast-Furnace Slag
Paper in proceedings, 2014

There are indications on that the initial setting time is dependent on the relative ratio of Na2O to SiO2 when sodium silicate solutions (Na2SiO3) are used for the alkali-activation of ground granulated blast-furnace slag (GGBS). One possible reason for this is that the ratio (called modulus) not only influences the pH but also the viscosity of the solution. The viscosity is, in turn dependent on the structures in the liquid. Therefore, we have investigated the structure of sodium silicate solutions of different moduli by infrared spectroscopy (IR) and silicon nuclear magnetic resonance (Si-29-NMR). The results, which show that the silica configuration is highly dependent on the modulus, will be discussed in relation to the initial setting time of corresponding measurements on GGBS hydration

Si-29-NMR

structure

infrared spectroscopy (IR)

water glass solutions

Author

Helen Jansson

Chalmers, Civil and Environmental Engineering, Building Technology

D. Bernin

Kerstin Ramser

Luping Tang

Chalmers, Civil and Environmental Engineering, Building Technology

RILEM Proceedings: 2nd International Conference on Advances in Chemically-Activated Materials (CAM-China)

1461-1147 (ISSN)

Vol. 92 309-318

Subject Categories

Materials Chemistry

ISBN

978-2-35158-142-1

More information

Created

10/7/2017