Publication detail

Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression

MIZEROVÁ, C. KUSÁK, I. TOPOLÁŘ, L. SCHMID, P. ROVNANÍK, P.

Original Title

Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression

Type

journal article in Web of Science

Language

English

Original Abstract

The development of smart materials is a basic prerequisite for the development of new tech-nologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive behavior of fly ash geopolymer with added carbon black under compression was studied. Prepared cubic specimens were doped with 0.5, 1, and 2% carbon black and embedded with four copper electrodes. In order to obtain a complex character-ization during compressive loading, the electrical resistivity, longitudinal strain and acoustic emission were recorded. The samples were tested in two modes: repeated loading under low compressive forces and continuous loading until failure. The results revealed piezoresistivity for all tested mixtures, but the best self-sensing properties were achieved with 0.5% of carbon black admixture. The complex analysis also showed that fly ash geopolymer undergoes permanent deformations and the addition of carbon black changes its character from quasi-brittle to rather ductile. The combination of electrical and acoustic methods enables the monitoring of materials far beyond the working range of a strain gauge.

Keywords

fly ash; geopolymer; carbon black; piezoresistivity; compressive loading; acoustic emission

Authors

MIZEROVÁ, C.; KUSÁK, I.; TOPOLÁŘ, L.; SCHMID, P.; ROVNANÍK, P.

Released

4. 8. 2021

Publisher

MDPI

Location

Switzerland

ISBN

1996-1944

Periodical

Materials

Year of study

14

Number

16

State

Swiss Confederation

Pages from

1

Pages to

11

Pages count

11

URL

https://www.mdpi.com/1996-1944/14/16/4350

Full text in the Digital Library

http://hdl.handle.net/11012/200924

BibTex

@article{BUT172177,
  author="Cecílie {Mizerová} and Ivo {Kusák} and Libor {Topolář} and Pavel {Schmid} and Pavel {Rovnaník}",
  title="Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression",
  journal="Materials",
  year="2021",
  volume="14",
  number="16",
  pages="1--11",
  doi="10.3390/ma14164350",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/14/16/4350"
}