Detail publikačního výsledku

Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer

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

Anglický název

Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer

Druh

Stať ve sborníku v databázi WoS či Scopus

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.

Anglický 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

Klíčová slova v angličtině

Fly ash; alkaline activation; carbon nanotubes; fracture properties; acoustic emission

Autoři

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

Rok RIV

2017

Vydáno

01.06.2016

Nakladatel

Elsevier

Kniha

International Conference on Ecology and new Building materials and products, ICEBMP 2016

ISSN

1877-7058

Periodikum

Procedia Engineering

Svazek

151

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

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"
}

Dokumenty

1-s2.0-S1877705816317489-main