Ceramics-Silikáty 58, (1) 79 - 88 (2014) |
|
IDENTIFICATION OF PHASE COMPOSITION OF BINDERS FROM ALKALI-ACTIVATED MIXTURES OF GRANULATED BLAST FURNACE SLAG AND FLY ASH
|
Vlček Josef 1, Drongová Lucie 1, Topinková Michaela 1,
Matějka Vlastimil 2,
Kukutschová Jana 2,
Vavro Martin 3,
Tomková Václava 1
|
1 Institute of Industrial Ceramics, Faculty of Metallurgy and Material Engineering,
VŠB-Technical University of Ostrava, 17. listopadu 15, 708 33, Ostrava-Poruba, Czech Republic
2 Nanotechnology Centre, VŠB-Technical University of Ostrava,
17. listopadu 15, 708 33, Ostrava-Poruba, Czech Republic
3 Department of Geomechanics and Mining Research,
Institute of Geonics AS CR, v.v.i., Studentská 1768, 708 00, Ostrava-Poruba, Czech Republic
|
Keywords: Binders, Alkali activation, Hydration products
|
The prepared alkali-activated binders (AAB) and composites using suitable latent hydraulic raw materials represent an
alternative to materials based on Portland cements. This paper deals with ways how to influence the functional parameters
of AAB by setting up mixtures of granulated blast furnace slag (GBFS) and fly ash with selected chemical compositions. In
this way the course of hydration process is modified and the phase composition of products of alkali activation is changed as
well as their final properties. The amorphous character of the hydration products makes evaluation of the phase composition
of hardened AAB difficult and significantly limits the number of experimental techniques suitable to characterise their phase
composition. It was observed that measuring the pH of water extracts obtained from the alkali-activated mixtures can give
supplementary information about the process of hardening of alkali-activated mixtures of GBFS and fly ash. |
 PDF (1.2 MB) |
|
