Publication detail

Influence of Polymer Additives on Mechanical Fracture Properties and on Shrinkage of Alkali Activated Slag Mortars

MIKHAILOVA, O. ŠIMONOVÁ, H. TOPOLÁŘ, L. ROVNANÍK, P.

Original Title

Influence of Polymer Additives on Mechanical Fracture Properties and on Shrinkage of Alkali Activated Slag Mortars

Type

conference paper

Language

English

Original Abstract

Alkali-activated slags represent an alternative to ordinary Portland cement due to reducing the environmental impact of the building industry. In spite of the numerous advantages of alkali activated slag mortars, alkali-activated aluminosilicates have big disadvantage – high value of shrinkage followed by formation of microcracks. This effect is caused by both autogenous and drying shrinkage and it finally results in volume contraction, microcracking and deterioration of the mechanical fracture properties. Therefore, using various types of polymer admixtures can overcome these problems. The aim of this paper is to present the effect of shrinkage-reducing admixture Peramin® SRA 40, polymer polyethylene glycol 1000 and polypropylene glycol on shrinkage and mechanical fracture characteristics of alkali-activated slag mortars. These admixtures were used in amount 0–2.0% weight of slag. The results showed that with increasing content of admixtures compressive and flexural strength decreased. Fracture tests with acoustic emission activity during this testing were carried out. Addition of 2% Peramin® SRA decreased shrinkage by 55%, but with 1% of Peramin® SRA the shrinkage was reduced only by 10%. Specimen with 1% of Peramin® is the most durable material, but more brittle compared to specimens with 1 and 2% of polypropylene glycol.

Keywords

alkali activated slag; organic additives; mechanical properties; shrinkage; fracture testing, acoustic emission method

Authors

MIKHAILOVA, O.; ŠIMONOVÁ, H.; TOPOLÁŘ, L.; ROVNANÍK, P.

Released

22. 1. 2018

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-0357-1096-0

Book

Key Engineering Materials: Non-Traditional Cement and Concrete

Edition number

Vol. 761

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

Vol. 761

Number

2018

State

Swiss Confederation

Pages from

39

Pages to

44

Pages count

6

URL

https://www.scientific.net/KEM.761.39

BibTex

@inproceedings{BUT144712,
  author="Olesia {Mikhailova} and Hana {Šimonová} and Libor {Topolář} and Pavel {Rovnaník}",
  title="Influence of Polymer Additives on Mechanical Fracture Properties and on Shrinkage of Alkali Activated Slag Mortars",
  booktitle="Key Engineering Materials: Non-Traditional Cement and Concrete",
  year="2018",
  journal="Key Engineering Materials (print)",
  volume="Vol. 761",
  number="2018",
  pages="39--44",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/KEM.761.39",
  isbn="978-3-0357-1096-0",
  issn="1013-9826",
  url="https://www.scientific.net/KEM.761.39"
}