Reactivity of precursors for geopolymerization studied by isothermal calorimetry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00377388" target="_blank" >RIV/68407700:21110/24:00377388 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10973-024-13492-y" target="_blank" >https://doi.org/10.1007/s10973-024-13492-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-024-13492-y" target="_blank" >10.1007/s10973-024-13492-y</a>

Result language

angličtina

Original language name

Reactivity of precursors for geopolymerization studied by isothermal calorimetry

Original language description

The paper deals with analyzes of Isothermal Conduction Calorimetry response obtained during the alkaline activation of four types of precursors (metakaolin, slag and two kinds of waste ceramic powders) to geopolymers. The first two precursors are traditionally used, while the latter two are emerging materials and knowledge of their alkaline activation might have high importance in the recycling of Construction and Demolition Waste. The studied precursors differ each to other not only in the chemical composition, but also in the phase composition-the waste ceramic precursors are highly crystalline. It was found that the total reaction heat evolved in the geopolymerization is directly proportional to the amorphous matter content as well as to the compressive strength of the activated product. This finding can be used as fast evaluation tool in searching of new potential geopolymer precursors. The dissolution and polycondensation steps were observed in all experiments and their kinetics was described by Jander's equation. While the rate of dissolution step is not dependent on temperature, the polycondensation has been accelerated by the higher temperature. The level of the rate acceleration was described by apparent activation energy; these findings can be useful in tuning of geopolymers curing procedure.

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

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GA23-04772S" target="_blank" >GA23-04772S: Physical and chemical processes in alkali activated ceramics exposed to high temperatures</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

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

13

Pages from-to

10619-10631

UT code for WoS article

001296518800002

EID of the result in the Scopus database

2-s2.0-85201815738