Publication detail

Carbon nanotube reinforced alkali-activated slag mortars

ROVNANÍK, P. ŠIMONOVÁ, H. TOPOLÁŘ, L. BAYER, P. SCHMID, P. KERŠNER, Z.

Original Title

Carbon nanotube reinforced alkali-activated slag mortars

Type

journal article in Web of Science

Language

English

Original Abstract

The paper reports on a study of the effect of multi-walled carbon nanotubes (MWCNTs) when used as dispersed reinforcement on the fracture properties and microstructure of alkali-activated slag mortars. The amount of MWCNTs added varied in the range of 0.05–1.0% of the mass of slag. Mechanical and fracture properties were determined using fracture tests carried out on 40 × 40 × 160 mm specimens with a central notch. The observed parameters were compressive strength, modulus of elasticity, effective fracture toughness and specific fracture energy. Specimen response during fracture tests was also monitored by means of acoustic emission, and this method was also used for the determination of cracking tendency due to autogenous and drying shrinkage occurring during the hardening process. It is shown that the addition of up to 0.2% of MWCNTs improves the fracture properties of alkali-activated slag. Although a higher dosage of MWCNTs reduced the number of microcracks observed by acoustic emission, the mechanical properties of the slag deteriorated due to the less effective dispersion of the MWCNTs and the formation of bundles.

Keywords

Alkali-activation; slag; carbon nanotubes; fracture properties; acoustic emission; microstructure

Authors

ROVNANÍK, P.; ŠIMONOVÁ, H.; TOPOLÁŘ, L.; BAYER, P.; SCHMID, P.; KERŠNER, Z.

Released

4. 5. 2016

Publisher

Elsevier

ISBN

0950-0618

Periodical

Construction and building materials

Year of study

119

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

223

Pages to

229

Pages count

7

BibTex

@article{BUT125392,
  author="Pavel {Rovnaník} and Hana {Šimonová} and Libor {Topolář} and Patrik {Bayer} and Pavel {Schmid} and Zbyněk {Keršner}",
  title="Carbon nanotube reinforced alkali-activated slag mortars",
  journal="Construction and building materials",
  year="2016",
  volume="119",
  number="1",
  pages="223--229",
  doi="10.1016/j.conbuildmat.2016.05.051",
  issn="0950-0618"
}