Detail publikace

Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers

ŠIMONOVÁ, H. FRANTÍK, P. KERŠNER, Z. SCHMID, P. ROVNANÍK, P.

Originální název

Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Knowledge of the mechanical and primarily fracture parameters of composites with a brittle matrix is essential for the quantification of their resistance to crack initiation and growth, and also for the specification of material model parameters employed for the simulation of the quasi-brittle behavior of structures made from this type of composite. Therefore, the main target of this paper is to quantify the mechanical fracture parameters of alkali-activated slag composites with steel microfibers and the contribution of the matrix to their fracture response. The first alkali-activated slag composite was a reference version without fibers; the others incorporated steel microfibers amounting to 5, 10, 15 and 20% by weight of the slag. Prism specimens with an initial central edge notch were used to perform the three-point bending fracture tests. Load vs. displacement (deflection at midspan) and load vs. crack mouth opening displacement diagrams were recorded during the fracture tests. The obtained diagrams were employed as inputs for parameter identification, the aim of which was to transfer the fracture test response data to the desired material parameters. Values were also determined for fracture parameters using the effective crack model, work-of-fracture method and double-K fracture model. All investigated mechanical fracture parameters were improved by the addition of steel microfibers to the alkali-activated matrix. Based on the obtained results, the addition of 10 to 15% of microfibers by weight is optimal from the point of view of the enhancement of the fracture parameters of alkali-activated slag composite

Klíčová slova

alkali-activated slag; steel microfibers; fracture test; identification; work-of-fracture method; double-K model; crack propagation

Autoři

ŠIMONOVÁ, H.; FRANTÍK, P.; KERŠNER, Z.; SCHMID, P.; ROVNANÍK, P.

Vydáno

16. 5. 2019

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

2076-3417

Periodikum

Applied Sciences - Basel

Ročník

9

Číslo

9

Stát

Švýcarská konfederace

Strany od

1

Strany do

14

Strany počet

14

URL

https://www.mdpi.com/2076-3417/9/9/1754

Plný text v Digitální knihovně

http://hdl.handle.net/11012/173199

BibTex

@article{BUT156710,
  author="Hana {Šimonová} and Petr {Frantík} and Zbyněk {Keršner} and Pavel {Schmid} and Pavel {Rovnaník}",
  title="Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers",
  journal="Applied Sciences - Basel",
  year="2019",
  volume="9",
  number="9",
  pages="1--14",
  doi="10.3390/app9091754",
  issn="2076-3417",
  url="https://www.mdpi.com/2076-3417/9/9/1754"
}