Ceramics-Silikáty 55, (4) 410 - 417 (2011) |
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RAMAN SPECTROSCOPY STRUCTURAL STUDY OF FIRED CONCRETE
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Pešková Šárka 1, Machovič Vladimír 2,3, Procházka Petr 1
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1 Czech Technical University in Prague, Faculty of Civil Engineering,
Thákurova 7, 166 29 Prague, Czech Republic
2 Institute of Chemical Technology Prague, Technická 5, 166 28, Prague, Czech Republic
3 Institute of Rock Structure and Mechanics v.v.i., ASCR,
V Holešovičkách 41, 182 09 Prague, Czech Republic
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Keywords: Fired concrete, Cracks, Raman microspectroscopy
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Raman spectroscopic structural analysis of concrete cementious matrix represents elegant method to determination of thermal
history of highly exposed concrete. Experiments were carried out in furnace at 1200°C. On the surface of heated concrete
mechanical cracks and the mixture of dicalcium silicate and gehlenite were found, while inside the cracks the development of
gehlenite, pseudowollastonite, pseudobrookite and various iron oxides and spinels was observed. The products of chemical
reactions analyzed by Raman spectroscopy can be used as markers for the identification and understanding the structural
changes during a fire treatment. |
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