Detail publikace

Thermal behaviour of metakaolin/fly ash geopolymers with chamotte aggregate

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

13

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"
}