Publication detail

Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres

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

Original Title

Type

conference paper

Language

English

Original Abstract

The main attention is focused on the evaluation of three-point bending fracture tests of prismatic specimens with an initial central edge notch made of selected fly ash based geopolymer mortars reinforced with hemp fibres. The design of selected mix composition was performed based on the preliminary research work which included the analysis of different fly ash types and quantities, as well as the different content of hemp fibres influence on the compressive and flexural strength. The load vs. displacement (deflection in the middle of span length) diagrams were recorded during the fracture tests and discussed. Mechanical fracture parameters were subsequently evaluated using the Effective Crack Model and Work-of-fracture method: modulus of elasticity, effective fracture toughness and specific fracture energy. The obtained results show that the fracture parameters increased with addition of hemp fibres up to 10% in case of effective fracture toughness and more than threefold in the case of specific fracture energy. It seems that the obtained results comply with the assumptions that the addition of fibres into alkali activated matrix should lead to reduce cracking tendency and improve tensile properties of these materials. On the other hand, it is necessary to perform more tests or determine other parameters to affirm these pilot results.

Keywords

geopolymer mortar, fly ash, hemp fibres, fracture behaviour

Authors

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

Released

1. 10. 2019

Publisher

Fédération internationale du béton (fib)

Location

Switzerland

ISBN

978-1-877040-15-3

Book

FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger

ISBN

2617-4820

Periodical

International fib Congress on Better, Smarter, Stronger, 2018

State

Australia

Pages from

3627

Pages to

3637

Pages count

BibTex

@inproceedings{BUT159038,
  author="Hana {Šimonová} and Jelena {Dragas} and Barbara {Kucharczyková} and Zbyněk {Keršner} and Ivan {Ignjatovic} and Miroslav {Komljenovic} and Violeta {Nikolic}",
  title="Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres",
  booktitle="FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger",
  year="2019",
  journal="International fib Congress on Better, Smarter, Stronger, 2018",
  pages="3627--3637",
  publisher="Fédération internationale du béton (fib)",
  address="Switzerland",
  isbn="978-1-877040-15-3",
  issn="2617-4820"
}