Publication detail

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

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

Original Title

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

Type

conference paper

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

1. 6. 2016

Publisher

Elsevier

ISBN

1877-7058

Periodical

Procedia Engineering

Year of study

151

Number

1

State

Kingdom of the Netherlands

Pages from

321

Pages to

328

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S1877705816317489

Full text in the Digital Library

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"
}