Phase composition of ceramic-based alkali-activated polymers: combination of X-ray diffraction and thermal analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00340932" target="_blank" >RIV/68407700:21110/20:00340932 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s10973-020-09369-5" target="_blank" >https://doi.org/10.1007/s10973-020-09369-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-020-09369-5" target="_blank" >10.1007/s10973-020-09369-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Phase composition of ceramic-based alkali-activated polymers: combination of X-ray diffraction and thermal analysis

Popis výsledku v původním jazyce

Alkali-activated aluminosilicate polymers (AAP, geopolymers) are potentially able to replace partially the Portland cement production-and thus related energy consumption and CO2 emissions. Another benefit of AAP lies in possibility to prepare AAP from numerous aluminosilicate wastes. Besides the widely studied fly ash and blast furnace slag, also waste ceramic materials can be used. The present paper deals with preparation of AAP from alkali-activated red-clay ceramics. This material is specific, when compared to other AAP precursors, with lower amount of amorphous phase. The ceramic waste was activated by sodium silicate solution of various silicate moduli. The composition of the prepared materials was examined with the help of thermogravimetry and X-ray diffraction. Activated aluminosilicates are roentgen-amorphous, and thus, they are not directly detected by XRD; nevertheless, XRD can quantify the content of crystalline minerals and amorphous portion of material. Thermogravimetry was used in order to determine the amount of chemically bound water. Combination of these methods enabled to determine empirical formula of the activated material. Mixture of N-A-S-H and C-A-S-H products was identified; amount of C-A-S-H positively influenced the compressive strength of the prepared materials.

Název v anglickém jazyce

Phase composition of ceramic-based alkali-activated polymers: combination of X-ray diffraction and thermal analysis

Popis výsledku anglicky

Alkali-activated aluminosilicate polymers (AAP, geopolymers) are potentially able to replace partially the Portland cement production-and thus related energy consumption and CO2 emissions. Another benefit of AAP lies in possibility to prepare AAP from numerous aluminosilicate wastes. Besides the widely studied fly ash and blast furnace slag, also waste ceramic materials can be used. The present paper deals with preparation of AAP from alkali-activated red-clay ceramics. This material is specific, when compared to other AAP precursors, with lower amount of amorphous phase. The ceramic waste was activated by sodium silicate solution of various silicate moduli. The composition of the prepared materials was examined with the help of thermogravimetry and X-ray diffraction. Activated aluminosilicates are roentgen-amorphous, and thus, they are not directly detected by XRD; nevertheless, XRD can quantify the content of crystalline minerals and amorphous portion of material. Thermogravimetry was used in order to determine the amount of chemically bound water. Combination of these methods enabled to determine empirical formula of the activated material. Mixture of N-A-S-H and C-A-S-H products was identified; amount of C-A-S-H positively influenced the compressive strength of the prepared materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA19-01982S" target="_blank" >GA19-01982S: Alkalicky aktivované aluminosilikátové kompozity na bázi keramických prekurzorů</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

1588-2926

Svazek periodika

142

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

10

Strana od-do

157-166

Kód UT WoS článku

000510102300009

EID výsledku v databázi Scopus

2-s2.0-85078773551