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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU127688" target="_blank" >RIV/00216305:26110/18:PU127688 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/18:00489350 RIV/68407700:21110/18:00321367

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169131718301790" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169131718301790</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2018.04.019" target="_blank" >10.1016/j.clay.2018.04.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

APPLIED CLAY SCIENCE

ISSN

0169-1317

e-ISSN

1872-9053

Svazek periodika

2018

Číslo periodika v rámci svazku

161

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

82-89

Kód UT WoS článku

000436916600011

EID výsledku v databázi Scopus

2-s2.0-85045702890