Detail publikace

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

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

Originální název

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

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

22. 1. 2018

Nakladatel

Trans Tech Publications

Místo

Switzerland

ISBN

978-3-0357-1096-0

Kniha

Key Engineering Materials: Non-Traditional Cement and Concrete

Číslo edice

Vol. 761

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Ročník

Vol. 761

Číslo

2018

Stát

Švýcarská konfederace

Strany od

39

Strany do

44

Strany počet

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"
}