Detail publikačního výsledku

Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO content

KEPPERT, M.; VEJMELKOVÁ, E.; BEZDIČKA, P.; DOLEŽELOVÁ, M.; ČÁCHOVÁ, M.; SCHEINHERROVÁ, L.; POKORNÝ, J.; VYŠVAŘIL, M.; ROVNANÍKOVÁ, P.; ČERNÝ, R.

Originální název

Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO content

Anglický název

Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO content

Druh

Článek WoS

Originální abstrakt

Geopolymers are conventionally prepared from metakaolin, fly ash, or blast furnace slag. In this paper, geopolymer synthesis using two different red-clay ceramic powders and a varying amount of Na2O/SiO2 activator is presented. Experimental results show that despite of the high content of crystalline minerals and lower concentration of amorphous matter, both tested precursors enable to prepare geopolymers with satisfactory mechanical properties. The discussion of measured values of compressive strength with respect to SiO2/Al2O3 and Al2O3/(Na2O+K2O) ratios in the prepared geopolymer mixes reveals that the consideration of only amorphous portion of ceramics is appropriate. A higher content of CaO in the precursor is found to cause a broader pore size distribution and higher porosity of resulting geopolymers, which is due to the formation of calcium silicate hydrates.

Anglický abstrakt

Geopolymers are conventionally prepared from metakaolin, fly ash, or blast furnace slag. In this paper, geopolymer synthesis using two different red-clay ceramic powders and a varying amount of Na2O/SiO2 activator is presented. Experimental results show that despite of the high content of crystalline minerals and lower concentration of amorphous matter, both tested precursors enable to prepare geopolymers with satisfactory mechanical properties. The discussion of measured values of compressive strength with respect to SiO2/Al2O3 and Al2O3/(Na2O+K2O) ratios in the prepared geopolymer mixes reveals that the consideration of only amorphous portion of ceramics is appropriate. A higher content of CaO in the precursor is found to cause a broader pore size distribution and higher porosity of resulting geopolymers, which is due to the formation of calcium silicate hydrates.

Klíčová slova

Geopolymers; Red-clay ceramics; Composition; Amorphous content; Calcium oxide

Klíčová slova v angličtině

Geopolymers; Red-clay ceramics; Composition; Amorphous content; Calcium oxide

Autoři

KEPPERT, M.; VEJMELKOVÁ, E.; BEZDIČKA, P.; DOLEŽELOVÁ, M.; ČÁCHOVÁ, M.; SCHEINHERROVÁ, L.; POKORNÝ, J.; VYŠVAŘIL, M.; ROVNANÍKOVÁ, P.; ČERNÝ, R.

Rok RIV

2019

Vydáno

01.09.2018

ISSN

0169-1317

Periodikum

APPLIED CLAY SCIENCE

Svazek

2018

Číslo

161

Stát

Nizozemsko

Strany od

82

Strany do

89

Strany počet

8

URL

https://www.sciencedirect.com/science/article/pii/S0169131718301790

BibTex

@article{BUT147069,
  author="Martin {Keppert} and Eva {Vejmelková} and Petr {Bezdička} and Magdalena {Doleželová} and Monika {Čáchová} and Lenka {Scheinherrová} and Jaroslav {Pokorný} and Martin {Vyšvařil} and Pavla {Rovnaníková} and Robert {Černý}",
  title="Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO content",
  journal="APPLIED CLAY SCIENCE",
  year="2018",
  volume="2018",
  number="161",
  pages="82--89",
  doi="10.1016/j.clay.2018.04.019",
  issn="0169-1317",
  url="https://www.sciencedirect.com/science/article/pii/S0169131718301790"
}