Alkali-Activated Metakaolin and Fly Ash as Unfired Ceramic Bonding Systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10247546" target="_blank" >RIV/61989100:27360/21:10247546 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27710/21:10247546

Result on the web

<a href="https://www.mdpi.com/2075-163X/11/2/197/htm" target="_blank" >https://www.mdpi.com/2075-163X/11/2/197/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min11020197" target="_blank" >10.3390/min11020197</a>

Result language

angličtina

Original language name

Alkali-Activated Metakaolin and Fly Ash as Unfired Ceramic Bonding Systems

Original language description

Metakaolin (MK) prepared by the calcination of kaolin at 550 degrees C and fly ash (FA) from the combustion of black coal in a granulating boiler were used to prepare unfired ceramic bonding systems via the alkali activation process. A long-term stability of the mechanical properties of the prepared samples similar to the unfired ceramic systems was observed. The optimal metakaolin and fly ash ratio, the type of the activator (NaOH or water glass) and its concentration were evaluated after the hydration in: a) laboratory conditions; b) hydration box; and c) under the hydrothermal activation. Raw materials and the samples prepared by alkali activation process were characterized by XRD, XRF, TG/DTA, and FTIR methods. The mechanical properties of the prepared samples were tested using a compressive strength test after 2, 28 and 56 days of hydration. The compressive strengths of 16 and 24 MPa after 28 days of hydration were reached for FA samples activated with water glass. The alkali activation of MK was successful in the NaOH solution of the molar concentration above 5 M. The compressive strength values of metakaolin, activated hydrothermally and hydrated at laboratory conditions, reached 11.2 and 5.5 MPa, respectively, for 5 M activator of NaOH.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

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

Name of the periodical

Minerals

ISSN

2075-163X

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

2

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

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UT code for WoS article

000622846600001

EID of the result in the Scopus database

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