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ROVNANÍK, P. ŠAFRÁNKOVÁ, K.
Originální název
Thermal behaviour of metakaolin/fly ash geopolymers with chamotte aggregate
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Geopolymers are generally appreciated for their good resistance against high temperatures. This paper compares the influence of thermal treatment with temperatures ranging from 200–1200 °C on the mechanical properties and microstructure of geopolymers based on two different aluminosilicate precursors, metakaolin and fly ash. Moreover, the paper is also aimed at characterizing the effect of chamotte aggregate on the performance of geopolymers subjected to high temperatures. Thermal treatment leads to a deterioration in the strength of metakaolin geopolymer, whereas fly ash geopolymer gains strength upon heating. The formation of albite above 900 °C is responsible for the fusion of geopolymer matrix during exposure to 1200 °C, which leads to the deformation of the geopolymer samples. Chamotte aggregate improves the performance of geopolymer material by increasing the thermal stability of geopolymers via sintering of the aggregate particles with the geopolymer matrix in the contact zone.
Klíčová slova
geopolymer; fly ash; metakaolin; high temperatures; chamotte; microstructure
Autoři
ROVNANÍK, P.; ŠAFRÁNKOVÁ, K.
Vydáno
30. 6. 2016
Nakladatel
MDPI
ISSN
1996-1944
Periodikum
Materials
Ročník
2016
Číslo
9
Stát
Švýcarská konfederace
Strany od
1
Strany do
13
Strany počet
URL
http://www.mdpi.com/1996-1944/9/7/535
Plný text v Digitální knihovně
http://hdl.handle.net/11012/62268
BibTex
@article{BUT126891, author="Pavel {Rovnaník} and Kristýna {Halasová}", title="Thermal behaviour of metakaolin/fly ash geopolymers with chamotte aggregate", journal="Materials", year="2016", volume="2016", number="9", pages="1--13", doi="10.3390/ma9070535", issn="1996-1944", url="http://www.mdpi.com/1996-1944/9/7/535" }