Effect of amino alcohol admixtures on alkali-activated materials
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F20%3APU136662" target="_blank" >RIV/00216305:26310/20:PU136662 - isvavai.cz</a>
Result on the web
<a href="http://mit.imt.si/izvodi/mit203/kalina.pdf" target="_blank" >http://mit.imt.si/izvodi/mit203/kalina.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17222/mit.2019.150" target="_blank" >10.17222/mit.2019.150</a>
Alternative languages
Result language
angličtina
Original language name
Effect of amino alcohol admixtures on alkali-activated materials
Original language description
One of the most important technological problems associated with alkali-activated materials (AAM) is large shrinkage. Apossible solution to decrease the extensive drying shrinkage of these materials is the use of shrinkage-reducing admixtures(SRAs). The promising group of SRAs, from the perspective of using in AAMs, are amino alcohols. However, the efficiency ofreducing the drying shrinkage strongly depends on their chemical structure. Hence, the study is focused on the moleculararchitecture of amino alcohol surfactants and its relation to the affected properties of alkali-activated blast-furnace slag systems. Selected amino alcohols were tested in terms of the ability to reduce the surface tension of pore solution as well as to influencethe drying shrinkage, hydration mechanism and mechanical properties of AAMs. The study confirms that the length andbranching of the alkyl chain linked to the amino group play the key role in SRA efficiency. Amino alcohol surfactants with ahigh-carbon alkyl chain decreased dramatically both the surface tension and the drying shrinkage, but simultaneously negativelyaffected the process of alkali activation, resulting in a deterioration of the mechanical properties. Conversely, the addition of0.5w/ % of the surfactants with a low molecular weight, such as 2-(Methylamino)ethanol, showed a slight improvement of thecompressive strength after 7 d and 28 d, and at the same time reduced the drying shrinkage by 30 % compared to the referencesample.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA17-03670S" target="_blank" >GA17-03670S: Development of shrinkage reducing agents designed for alkali activated systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materiali in tehnologije
ISSN
1580-2949
e-ISSN
1580-3414
Volume of the periodical
54
Issue of the periodical within the volume
3
Country of publishing house
SI - SLOVENIA
Number of pages
5
Pages from-to
349-353
UT code for WoS article
000541971400010
EID of the result in the Scopus database
2-s2.0-85089340240