Detail publikace

Evaluation of Wedge Splitting Fracture Tests using the Double-K Model: Analysis of the Effect of Hemp Fibre Dosage and Length in Concrete Specimens.

ŠIMONOVÁ, H. HAVLÍKOVÁ, I. SOBEK, J. ABDULRAHMAN, A. KERŠNER, Z. MERTA, I.

Originální název

Evaluation of Wedge Splitting Fracture Tests using the Double-K Model: Analysis of the Effect of Hemp Fibre Dosage and Length in Concrete Specimens.

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

This paper presents the results obtained from the employment of a selected fracture model to evaluate wedge splitting fracture tests carried out on hemp fibre concrete specimens. The research was mainly focused on the effect of the dosage and length of hemp fibres on the initiation part of crack propagation in concrete specimens, and on critical crack opening displacement. Concrete mixtures with different volumetric dosages (0.5, 1.0 and 2.0 %) and fibre lengths (10, 20 and 40 mm) were prepared, and six identical specimens were cast from each mixture. Specimens were also cast from a reference mixture, which was without fibres. The specimens were provided with an initial notch and tested using the wedge splitting test method. Load versus crack mouth opening displacement diagrams were recorded and (after data filtering and appropriate modifications) subsequently evaluated using the Double-K fracture model. This model allows the evaluation of two material parameters – the initiation fracture toughness, which defines the onset of stable crack propagation, and the unstable fracture toughness, which defines the onset of unstable cracking or failure. Finally, the critical crack opening displacement was determined with the assumption of the bilinear function of softening in tension.

Klíčová slova

Concrete, hemp fibre, fracture, Double-K model.

Autoři

ŠIMONOVÁ, H.; HAVLÍKOVÁ, I.; SOBEK, J.; ABDULRAHMAN, A.; KERŠNER, Z.; MERTA, I.

Vydáno

25. 4. 2016

Místo

Switzerland

ISBN

978-3-03835-675-2

Kniha

Proceeding from 22nd Czech Concrete Day 2015

ISSN

1012-0394

Periodikum

Solid State Phenomena

Číslo

249

Stát

Švýcarská konfederace

Strany od

142

Strany do

146

Strany počet

5

BibTex

@inproceedings{BUT124280,
  author="Hana {Šimonová} and Ivana {Havlíková} and Jakub {Sobek} and Alaa {Abdulrahman} and Zbyněk {Keršner} and Ildiko {Merta}",
  title="Evaluation of Wedge Splitting Fracture Tests using the Double-K Model: Analysis of the Effect of Hemp Fibre Dosage and Length in Concrete Specimens.",
  booktitle="Proceeding from 22nd Czech Concrete Day 2015",
  year="2016",
  journal="Solid State Phenomena",
  number="249",
  pages="142--146",
  address="Switzerland",
  isbn="978-3-03835-675-2",
  issn="1012-0394"
}