Detail publikace

Shrinkage-Reducing Admixture Efficiency in Alkali-Activated Slag across the Different Doses of Activator

BÍLEK Jr., V. KALINA, L. FOJTÍK, O.

Originální název

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

Strany do

Strany počet

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"
}