Alkali-activated waste ceramics: Importance of precursor particle size distribution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00355349" target="_blank" >RIV/68407700:21110/21:00355349 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.ceramint.2021.08.037" target="_blank" >https://doi.org/10.1016/j.ceramint.2021.08.037</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2021.08.037" target="_blank" >10.1016/j.ceramint.2021.08.037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Alkali-activated waste ceramics: Importance of precursor particle size distribution

Popis výsledku v původním jazyce

The waste ceramics belongs to wide range of aluminosilicate materials which can be alkaline-activated to geopolymer cement - possible "green" alternative to conventional Portland cement. The studied ceramic material is generated during the size adjustment of ceramic building blocks by means of grinding. It means that most of the material is very fine, but it contains also some larger shards. This ceramic powder was used as geopolymer precursor "as received" and after removal of particles retained on 1, 0.5 and 0.125 mm sieves. These four types of precursor were activated by sodium silicate (SiO2/Na2O = 1) solution. The prepared mortars were tested for strength, basic physical properties, transport parameters and characterized by help of XRD and thermal analysis. It was found that the best mechanical performance provided the precursor after removal of particles retained on 0.5 mm sieve thanks to the highest geopolymerization rate. The presence of coarser particles in precursor gave rise to porosity, what consequently influenced transport parameter of geopolymers towards the lower thermal conductivity and faster moisture transport.

Název v anglickém jazyce

Alkali-activated waste ceramics: Importance of precursor particle size distribution

Popis výsledku anglicky

The waste ceramics belongs to wide range of aluminosilicate materials which can be alkaline-activated to geopolymer cement - possible "green" alternative to conventional Portland cement. The studied ceramic material is generated during the size adjustment of ceramic building blocks by means of grinding. It means that most of the material is very fine, but it contains also some larger shards. This ceramic powder was used as geopolymer precursor "as received" and after removal of particles retained on 1, 0.5 and 0.125 mm sieves. These four types of precursor were activated by sodium silicate (SiO2/Na2O = 1) solution. The prepared mortars were tested for strength, basic physical properties, transport parameters and characterized by help of XRD and thermal analysis. It was found that the best mechanical performance provided the precursor after removal of particles retained on 0.5 mm sieve thanks to the highest geopolymerization rate. The presence of coarser particles in precursor gave rise to porosity, what consequently influenced transport parameter of geopolymers towards the lower thermal conductivity and faster moisture transport.

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

2021

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Svazek periodika

47

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

9

Strana od-do

31574-31582

Kód UT WoS článku

000702559800005

EID výsledku v databázi Scopus

2-s2.0-85112186897