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ROVNANÍK, P. ŠIMONOVÁ, H. TOPOLÁŘ, L. SCHMID, P. KERŠNER, Z.
Originální název
Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
Fly ash geopolymer is amorphous aluminosilicate material which is considered as alternative to Portland cement concrete. One of the limiting factors of its utilization is an increased shrinkage and related deterioration of fracture properties. This paper reports on a study of the application of multi-walled carbon nanotubes (MWCNTs) to improve the fracture properties of fly ash geopolymer. The amount of MWCNTs added varied in the range of 0.05–0.2% of the mass of fly ash. Mechanical fracture properties were determined via evaluation of three-point bending fracture tests. 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 occurring during the hardening process. Results show that the addition of MWCNTs increases the elastic modulus and compressive strength of fly ash geopolymer. However, basic fracture parameters (fracture toughness, fracture energy) firstly decreased with very small addition of MWCNTs and were regained or slightly exceeded the reference values with higher amount of MWCNTs.
Klíčová slova
Fly ash; alkaline activation; carbon nanotubes; fracture properties; acoustic emission
Autoři
ROVNANÍK, P.; ŠIMONOVÁ, H.; TOPOLÁŘ, L.; SCHMID, P.; KERŠNER, Z.
Vydáno
1. 6. 2016
Nakladatel
Elsevier
ISSN
1877-7058
Periodikum
Procedia Engineering
Ročník
151
Číslo
1
Stát
Nizozemsko
Strany od
321
Strany do
328
Strany počet
8
URL
https://www.sciencedirect.com/science/article/pii/S1877705816317489
Plný text v Digitální knihovně
http://hdl.handle.net/11012/204192
BibTex
@inproceedings{BUT128440, author="Pavel {Rovnaník} and Hana {Šimonová} and Libor {Topolář} and Pavel {Schmid} and Zbyněk {Keršner}", title="Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer", booktitle="International Conference on Ecology and new Building materials and products, ICEBMP 2016", year="2016", journal="Procedia Engineering", volume="151", number="1", pages="321--328", publisher="Elsevier", doi="10.1016/j.proeng.2016.07.360", issn="1877-7058", url="https://www.sciencedirect.com/science/article/pii/S1877705816317489" }