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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" }