Publication detail

The Effect of the Organic Additives on the Mechanical Fracture Properties and Shrinkage of Alkali Activated Slag Mortars

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

Original Title

The Effect of the Organic Additives on the Mechanical Fracture Properties and Shrinkage of Alkali Activated Slag Mortars

Type

abstract

Language

English

Original Abstract

It is known that the production of Portland cement consumes considerable energy and contributes a large volume of CO2 to the atmosphere. One of alternative materials is alkali-activated binder using industrial by-products containing silicate materials. Alkali-activated slag binders have many advantages, but also have disadvantage as a high level of autogenous and especially drying shrinkage, which causes a deterioration of the mechanical fracture properties. This paper presents the effect of shrinkage-reducing admixture Peramin SRA 40, polymer polyethylene glycol 1000 and polypropylene glycol on shrinkage and mechanical properties of alkali-activated slag mortars. These admixtures were used in amount 0–2.0 % weight of slag. The results show that with increasing content of admixtures compressive and flexural strength decreased. On the other hand, promising results with respect of shrinkage reduction were obtained particularly for PPG where its 1 and 2 % doses reduced liner shrinkage of the reference mortar approximately by up to 70 %. The minimum decline of shrinkage was observed for 1 % Peramin SRA. Fracture tests with method of acoustic emission during this testing were explored.

Keywords

Organic additives, mechanical fracture properties, alkali activated, slag mortars

Authors

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

Released

28. 9. 2016

Location

Ljubljana, Slovenia

ISBN

978-961-94088-0-3

Book

24th International Conference on materials and Technology

Pages from

155

Pages to

155

Pages count

1

BibTex

@misc{BUT128769,
  author="Olesia {Mikhailova} and Hana {Šimonová} and Libor {Topolář} and Pavel {Rovnaník}",
  title="The Effect of the Organic Additives on the Mechanical Fracture Properties and  Shrinkage of Alkali Activated Slag Mortars",
  booktitle="24th International Conference on materials and Technology",
  year="2016",
  pages="155--155",
  address="Ljubljana, Slovenia",
  isbn="978-961-94088-0-3",
  note="abstract"
}