Publication detail

Comparison of different alkali activated mortars with hemp fibres response during fracture test by acoustic emission method

ŠIMONOVÁ, H. TOPOLÁŘ, L. KUCHARCZYKOVÁ, B. KERŠNER, Z. DRAGAS, J. IGNJATOVIC, I. KOMLJENOVIC, M. NIKOLIC, V.

Original Title

Type

abstract

Language

English

Original Abstract

In last decades, natural fibres are increasingly used as reinforcements for the production of low-cost composites in civil engineering. The benefits of natural fibers include non-abrasive nature, high specific properties, and biodegradability. However, their disadvantages are the bad moisture absorption, poor wettability and large scattering in mechanical properties. The aim of this paper is contribute to the better understanding of mechanical behaviour and failure modes of alkali activated materials reinforced by hemp fibers. Two different mortars based on alkali activated fly ash and slag were investigated. The paper includes the results of acoustic emission measurement captured during the three-point bending fracture test of specimens made of mentioned composites. Acoustic emission method is proving useful for the capability of real-time monitoring of materials over the whole volume and with high sensitivity to any processes generating stress waves. The effect of different mix composition and amount of hemp fibers on the acoustic signal features such as the energy, counting and amplitude is including in this research. The obtained acoustic emission results together with mechanical fracture parameters can serve as input values of material models used for modelling of structure response.

Keywords

acoustic emission, fracture, fly ash, slag, alkali activation

Authors

ŠIMONOVÁ, H.; TOPOLÁŘ, L.; KUCHARCZYKOVÁ, B.; KERŠNER, Z.; DRAGAS, J.; IGNJATOVIC, I.; KOMLJENOVIC, M.; NIKOLIC, V.

Released

28. 10. 2018

Location

Osaka

Pages from

310

Pages to

310

Pages count

BibTex

@misc{BUT150972,
  author="Hana {Šimonová} and Libor {Topolář} and Barbara {Kucharczyková} and Zbyněk {Keršner} and Jelena {Dragas} and Ivan {Ignjatovic} and Miroslav {Komljenovic} and Violeta {Nikolic}",
  title="Comparison of different alkali activated mortars with hemp fibres response during fracture test by acoustic emission method",
  booktitle="The 9th International Conference on Multiscale Material Modeling Abstrakt Book",
  year="2018",
  pages="310--310",
  address="Osaka",
  note="abstract"
}