Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU128808" target="_blank" >RIV/00216305:26110/18:PU128808 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2018.08.150" target="_blank" >http://dx.doi.org/10.1016/j.conbuildmat.2018.08.150</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2018.08.150" target="_blank" >10.1016/j.conbuildmat.2018.08.150</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

Popis výsledku v původním jazyce

Waste brick powder is a material with sufficient pozzolanic properties to be used as a supplementary cementing material in Portland cement-based concrete or as a precursor for the production of geopolymers. This study aimed to investigate a binary geopolymer system composed of metakaolin (MK), waste red brick (WRB) powder and sodium silicate solution as an alkaline activator. Five different mixtures were prepared where 0, 25, 50, 75, and 100% of the MK was substituted with WRB. The rheological parameters of the fresh pastes were correlated with a structural evaluation of the reaction process. The findings showed that the yield stress of all mixtures was very low, but it increased with time as the geopolymerization reaction proceeded. The more MK was used in the mixture, the faster the yield stress developed. On the other hand, the plastic viscosity strongly depended on the composition of the mixtures and dropped with increasing WRB/MK ratio. The mixtures containing more than 50% MK exhibited a decrease in viscosity with time due to higher reactivity and the faster dissolution of the MK particles.

Název v anglickém jazyce

Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

Popis výsledku anglicky

Waste brick powder is a material with sufficient pozzolanic properties to be used as a supplementary cementing material in Portland cement-based concrete or as a precursor for the production of geopolymers. This study aimed to investigate a binary geopolymer system composed of metakaolin (MK), waste red brick (WRB) powder and sodium silicate solution as an alkaline activator. Five different mixtures were prepared where 0, 25, 50, 75, and 100% of the MK was substituted with WRB. The rheological parameters of the fresh pastes were correlated with a structural evaluation of the reaction process. The findings showed that the yield stress of all mixtures was very low, but it increased with time as the geopolymerization reaction proceeded. The more MK was used in the mixture, the faster the yield stress developed. On the other hand, the plastic viscosity strongly depended on the composition of the mixtures and dropped with increasing WRB/MK ratio. The mixtures containing more than 50% MK exhibited a decrease in viscosity with time due to higher reactivity and the faster dissolution of the MK particles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

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

Construction and building materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

188

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

924-933

Kód UT WoS článku

000447579600081

EID výsledku v databázi Scopus

—