ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 56, (2) 168 - 176 (2012)


POTENTIAL MODIFICATION OF HYDRATION OF ALKALI ACTIVATED MIXTURES FROM GRANULATED BLAST FURNACE SLAG AND FLY ASH
 
Tomková Václava 1, Ovčačík Filip 1, Vlček Jozef 1, Ovčačíková Hana 1, Topinková Michaela 1, Vavro Martin 2, Martinec Petr 3
 
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 Department of Building Materials and Diagnostics of Structures, Faculty of Civil Engineering, VŠB-Technical University of Ostrava, L. Podéště 1875, 708 33, Ostrava-Poruba, Czech Republic
3 Institute of Geonics AS CR Ostrava, Studentská 1768, 708 00, Ostrava-Poruba, Czech Republic

Keywords: Alkali-activated materials, Blast furnace slag, Fly ash, Mechanical activation
 

Alkali activated binders (AAB) and composites from suitable latent hydraulic raw materials represent an alternative to materials based on Portland cements. The paper deals with possibilities to influence functional parameters of AAB by setting the mixtures of GBFS and fly ash to the selected chemical composition or by fly ash reactivity change effected by milling. In this way course of hydration process is modified, the alkali activation products phase composition is changed as well as their final characteristic. The amorphous character of the hydration products limits the evaluation of the composition during the massing phase. Part of the study is the search for possibilities of identifying the differences in composition and properties of specially drafted mixtures of original raw materials after their alkali activation.


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