Publication detail

Effect of a Combination Fly Ash and Shrinkage-Reducing Additives on the Properties of Alkali-Activated Slag-Based Mortars

BÍLEK Jr., V. KALINA, L. KOPLÍK, J. MONČEKOVÁ, M. NOVOTNÝ, R.

Original Title

Effect of a Combination Fly Ash and Shrinkage-Reducing Additives on the Properties of Alkali-Activated Slag-Based Mortars

English Title

Effect of a Combination Fly Ash and Shrinkage-Reducing Additives on the Properties of Alkali-Activated Slag-Based Mortars

Type

journal article in Web of Science

Language

en

Original Abstract

This study is aimed at reducing the drying shrinkage of alkali-activated slag (AAS) through the use of low-calcium fly ash (FA) and commercially available shrinkage-reducing additives (SRAs) originally developed for OPC-based binders, since there are no such admixtures tailored for AAS systems. Generally, all the SRAs tested are based on modified alcohols. All the mortars were based on slag activated by waterglass, with the water-to-slag ratio equal to 0.40 and the sand-to-binder ratio 2:1. In the first step, the effect of the partial replacement of slag by FA (25, 50 and 75) % of mass fractions on the drying shrinkage and compressive strength was investigated. On the basis of the obtained results a mortar with 50 % FA in the binder was chosen for subsequent experiments, where the influence of three types of SRAs on the drying-shrinkage behaviour was examined.

English abstract

This study is aimed at reducing the drying shrinkage of alkali-activated slag (AAS) through the use of low-calcium fly ash (FA) and commercially available shrinkage-reducing additives (SRAs) originally developed for OPC-based binders, since there are no such admixtures tailored for AAS systems. Generally, all the SRAs tested are based on modified alcohols. All the mortars were based on slag activated by waterglass, with the water-to-slag ratio equal to 0.40 and the sand-to-binder ratio 2:1. In the first step, the effect of the partial replacement of slag by FA (25, 50 and 75) % of mass fractions on the drying shrinkage and compressive strength was investigated. On the basis of the obtained results a mortar with 50 % FA in the binder was chosen for subsequent experiments, where the influence of three types of SRAs on the drying-shrinkage behaviour was examined.

Keywords

alkali-activated slag, fly ash, shrinkage reducing additives, shrinkage, strength

Released

01.09.2016

Publisher

Inštitut za kovinske materiale in tehnologije Ljublana

Location

Ljublana

ISBN

1580-2949

Periodical

Materiali in tehnologije

Year of study

50

Number

5

State

SI

Pages from

813

Pages to

817

Pages count

5

URL

Documents

BibTex


@article{BUT129139,
  author="Vlastimil {Bílek} and Lukáš {Kalina} and Jan {Koplík} and Miroslava {Mončeková} and Radoslav {Novotný}",
  title="Effect of a Combination Fly Ash and Shrinkage-Reducing Additives on the Properties of Alkali-Activated Slag-Based Mortars",
  annote="This study is aimed at reducing the drying shrinkage of alkali-activated slag (AAS) through the use of low-calcium fly ash (FA) and commercially available shrinkage-reducing additives (SRAs) originally developed for OPC-based binders, since there are no such admixtures tailored for AAS systems. Generally, all the SRAs tested are based on modified alcohols. All the mortars were based on slag activated by waterglass, with the water-to-slag ratio equal to 0.40 and the sand-to-binder ratio 2:1. In the first step, the effect of the partial replacement of slag by FA (25, 50 and 75) % of mass fractions on the drying shrinkage and compressive strength was investigated. On the basis of the obtained results a mortar with 50 % FA in the binder was chosen for subsequent experiments, where the influence of three types of SRAs on the drying-shrinkage behaviour was examined.",
  address="Inštitut za kovinske materiale in tehnologije Ljublana",
  chapter="129139",
  doi="10.17222/mit.2015.133",
  institution="Inštitut za kovinske materiale in tehnologije Ljublana",
  number="5",
  volume="50",
  year="2016",
  month="september",
  pages="813--817",
  publisher="Inštitut za kovinske materiale in tehnologije Ljublana",
  type="journal article in Web of Science"
}