Ceramics-Silikáty 48, (3) 117 - 120 (2004) |
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INVESTIGATION OF GEOPOLYMER BINDERS WITH RESPECT TO THEIR APPLICATION FOR BUILDING MATERIALS |
Kirschner Andrea V. 1, Harmuth Harald 2 |
1 Christian Doppler Laboratory for building materials with optimized properties at the Department of Ceramics,
University of Leoben, Peter-Tunner-Straße 5, A-8700 Leoben, Austria
2 Department of Ceramics, University of Leoben, Peter-Tunner-Straße 5, A-8700 Leoben, Austria
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Keywords: Geopolymer binders, Metakaoline, Alkali-activation |
Geopolymer binders based on a commercial metakaoline, water glass and sodium hydroxide have been investigated with
respect to their application for building materials. Mixture compositions with favourable properties could be identified. For
the production of building materials, a process technology at ambient temperature may be less feasible due to delayed setting
and strength evolution. Therefore curing at elevated temperatures was tested. A heat treatment at 75°C for 4 hours yields satisfactory
results. With this production technology geopolymer binders seem to be suitable for selected building materials like
reinforced particle boards. This is on the one hand due to a long processing time together with a rapid strength development
during temperature treatment. On the other hand they develop desirable properties like water resistivity, limited shrinkage
and sufficient strength values. |
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