The Initial Setting Time of Ground Granulated Blastfurnace Slag GGBS and Its Relation to the Modulus of the Alkali-Activating Solution
Paper i proceeding, 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

water glass solutions

SI-29 NMR-SPECTROSCOPY

BASE-LINE

infrared spectroscopy (IR)

Si-29-NMR

ELIMINATION

structure

SPECTRA

GEOPOLYMERS

Författare

Helen Jansson

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Diana Bernin

Göteborgs universitet

Luping Tang

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

2nd International conference on Advances in chemically-activated materials (CAM'2014), RILEM Proceedings

1461-1147 (ISSN)

Vol. 92 309-318

Ämneskategorier

Materialteknik

Styrkeområden

Building Futures

Materialvetenskap

ISBN

978-2-35158-142-1

Mer information

Skapat

2017-10-07