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BÍLEK Jr., V. KALINA, L. FOJTÍK, O.
Originální název
Shrinkage-Reducing Admixture Efficiency in Alkali-Activated Slag across the Different Doses of Activator
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
One of the largest obstacles for the wider use of alkali-activated slag (AAS) in a building industry is its severe drying shrinkage. According to some studies shrinkage-reducing admixtures (SRAs) could be a solution of this problem, but they were also reported to have a fatal impact on AAS hydration resulting in a serious strength development slowdown. The aim of this paper was to investigate this phenomenon in a wide range of the waterglass doses (4–12% Na2O of the slag mass). Mortars without and with 2% of SRA based on hexylene glycol were prepared and their shrinkage and compressive strength development was tested. By far the highest shrinkage reduction was observed for the lowest doses of waterglass, but these were also the cases of the highest compressive strength decrease. However, it is possible to suppress the negative effect of SRA on AAS strength development through the activator dose increase with certainly decreased shrinkage reducing ability of SRA.
Klíčová slova
Alkali-activated slag, shrinkage-reducing admixture, activator dose, drying shrinkage, compressive strength
Autoři
BÍLEK Jr., V.; KALINA, L.; FOJTÍK, O.
Vydáno
22. 1. 2018
ISSN
1013-9826
Periodikum
Key Engineering Materials (print)
Ročník
761
Číslo
Stát
Švýcarská konfederace
Strany od
19
Strany do
22
Strany počet
4
BibTex
@inproceedings{BUT145020, author="Vlastimil {Bílek} and Lukáš {Kalina} and Ondřej {Fojtík}", title="Shrinkage-Reducing Admixture Efficiency in Alkali-Activated Slag across the Different Doses of Activator", booktitle="Non-Traditional Cement and Concrete", year="2018", journal="Key Engineering Materials (print)", volume="761", number="", pages="19--22", doi="10.4028/www.scientific.net/KEM.761.19", issn="1013-9826" }