The work deals with the comparison of pozzolanic activity of selected fly ash (FA) and bottom ash (BA) from lignite power plants in the Czech Republic. Pozzolanic activity was determined by Frattini test, electrical conductivity test and strength activity index (SAI). The results of the Frattini test performed after 8 days according to ČSN EN 196-5 showed that all ashes have pozzolanic activity. In addition, the electrical conductivity test shows significant differences in the reactivity of the ash during the first hours of hydration. SAI was determined on mortars with 25 % ash replacement for cement after 28 days of hydration. The results of pozzolanic activity test methods were compared with each other and the correlations of the methods are discussed.
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18 August 2023
SPECIAL CONCRETE AND COMPOSITES 2021: 18th International Conference
13–14 October 2021
Skalský Dvůr, Czech Republic
Research Article|
August 18 2023
Comparison of different methods for assessing the pozzolanic activity of fly ash and bottom ash
Martina Šídlová;
Martina Šídlová
a)
1
Institute of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague
, Technicka 5, 166 28, Prague, Czech Republic
a)Corresponding author: [email protected]
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Rostislav Šulc;
Rostislav Šulc
b)
2
CTU in Prague, Faculty of Civil Engineering, Department of Construction Technology
, Thákurova 7/2077, 166 29 Prague 6, Czech Republic
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Pavol Rak;
Pavol Rak
c)
1
Institute of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague
, Technicka 5, 166 28, Prague, Czech Republic
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Petr Formáček;
Petr Formáček
d)
2
CTU in Prague, Faculty of Civil Engineering, Department of Construction Technology
, Thákurova 7/2077, 166 29 Prague 6, Czech Republic
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Klára Pulcová;
Klára Pulcová
e)
1
Institute of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague
, Technicka 5, 166 28, Prague, Czech Republic
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Roman Snop
Roman Snop
f)
3
ČEZ Energetické
produkty, s.r.o., Komenského 534, 253 01, Hostivice, Czech Republic
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a)Corresponding author: [email protected]
AIP Conf. Proc. 2780, 020023 (2023)
Citation
Martina Šídlová, Rostislav Šulc, Pavol Rak, Petr Formáček, Klára Pulcová, Roman Snop; Comparison of different methods for assessing the pozzolanic activity of fly ash and bottom ash. AIP Conf. Proc. 18 August 2023; 2780 (1): 020023. https://doi.org/10.1063/5.0137066
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