Title:
Polypropylene Glycols as Effective Shrinkage-Reducing Admixtures in Alkali-Activated Materials
Author(s):
Lukáš Kalina, Vlastimil Bílek Jr., Eva Bartonícˇ ková, and Jitka Krouská
Publication:
Materials Journal
Volume:
115
Issue:
2
Appears on pages(s):
251-256
Keywords:
alkali-activated materials; chemical admixtures; shrinkage reduction
DOI:
10.14359/51701099
Date:
3/1/2018
Abstract:
In recent years, the use of various nontraditional cements and composites has increased. Alkali-activated materials, especially those based on alkali activation of blast-furnace slag, have considerable potential in construction industry. However, alkali-activated slag binders exhibit significant shrinkage, in some circumstances several times greater than portland cement-based materials, which hinders wider use of these materials in numerous applications. Therefore, the use of specific admixtures suitable for alkaliactivated systems is necessary. This paper is consequently focused on testing the efficiency of shrinkage-reducing additives based on polypropylene glycols, as well as their influence on the hydration mechanism and mechanical properties of prepared alkali-activated materials.
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