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MIKHAILOVA, O. ROVNANÍK, P.
Original Title
Effect of organic additives on shrinkage of AAS mortars
Type
conference paper
Language
English
Original Abstract
Alkali-activated slag binders have many advantages such as mechanical performance, durability and chemical resistance compared to ordinary Portland cement. However, they also have disadvantages such as increased shrinkage followed by the formation of microcracks. This paper presents the effect of shrinkage-reducing admixture Peramin SRA 40, polymer polyethylene glycol 1000 and polypropylene glycol on shrinkage and mechanical characteristics of alkali-activated slag concrete. These admixtures were used in different dosages in the range of 0–2.0% by mass of the slag. The results show that with increasing content of admixtures compressive and flexural strengths decreased. On the other hand, promising results in respect of shrinkage reduction were obtained particularly for polypropylene glycol where it reduced linear shrinkage of the reference mortar by up to 70%. The minimum decline of shrinkage was observed for 1% of Peramin SRA 40.
Keywords
alkali-activated slag; shrinkage; organic additives; porosity
Authors
MIKHAILOVA, O.; ROVNANÍK, P.
Released
29. 1. 2016
Publisher
Brno University of Technology and CNDT
Location
Brno
ISBN
978-80-214-5315-9
Book
NDT konference v České republice 2015
Edition number
první
Pages from
25
Pages to
30
Pages count
5
BibTex
@inproceedings{BUT126510, author="Olesia {Mikhailova} and Pavel {Rovnaník}", title="Effect of organic additives on shrinkage of AAS mortars", booktitle="NDT konference v České republice 2015", year="2016", number="první", pages="25--30", publisher="Brno University of Technology and CNDT", address="Brno", isbn="978-80-214-5315-9" }