Thermal activation of illitic-kaolinitic mixed clays
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00375564" target="_blank" >RIV/68407700:21110/24:00375564 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s10973-024-13342-x" target="_blank" >https://doi.org/10.1007/s10973-024-13342-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-024-13342-x" target="_blank" >10.1007/s10973-024-13342-x</a>
Alternative languages
Result language
angličtina
Original language name
Thermal activation of illitic-kaolinitic mixed clays
Original language description
The thermally activated clay minerals are well-known as perspective supplementary cementing materials (SCMs) able to reduce the Portland clinker consumption and thus also the related CO2 emissions. The best SCM performance among clay minerals is provided by thermally activated kaolin (metakaolin). Nevertheless, kaolinitic clays are not available everywhere, while varying mixed clays can be considered as globally affordable raw materials. The present work deals with the thermal activation of four illitic-kaolinitic clays with varied content of clay minerals, quartz and calcite, available locally in the Czech Republic. The attainment of activation was evaluated with the help of mechanical strength and the saturated lime test. There is no doubt that kaolin is the best clay for SCM production. However, the activation of mixed illitic-kaolinitic clays at 600 °C provided comparable and sufficient performance, despite that the crystal structure of illite was not completely decomposed. The non-clay minerals presence did not reduce the activity either; even the clay containing just about 50% of clay minerals (mostly illite) treated at 650 °C provided sufficient mechanical performance. As the drawback of activated illitic clays must be considered their higher sensitivity to the proper calcination temperature compared to metakaolin since illite (and other 2:1 clay minerals) does not form any metastable dehydroxylated phase.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA22-16577S" target="_blank" >GA22-16577S: Alternatives of thermally activated lower grade clays as a partial cement replacement</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Thermal Analysis and Calorimetry
ISSN
1388-6150
e-ISSN
1588-2926
Volume of the periodical
149
Issue of the periodical within the volume
19
Country of publishing house
HU - HUNGARY
Number of pages
12
Pages from-to
10533-10544
UT code for WoS article
001244636400001
EID of the result in the Scopus database
2-s2.0-85195637040