Detail publikace

Mechanical fracture parameters of concrete drill-core specimens supported by a slenderness ratio study

LISZTWAN, D. KUMPOVÁ, I. DANĚK, P. FRANTÍK, P. KERŠNER, Z.

Originální název

Mechanical fracture parameters of concrete drill-core specimens supported by a slenderness ratio study

Typ

článek ve sborníku mimo WoS a Scopus

Jazyk

angličtina

Originální abstrakt

The detailed analytical and experimental investigation of the fracture behaviour of quasi-brittle materials is an endeavour which has been ongoing worldwide for many years. Such materials are usually characterized in terms of their mechanical fracture parameters, which are determined based on the evaluation of quasi-static fracture experiments. One of the most commonly used building materials with a quasi-brittle response is concrete, which is most often based on a cement matrix. It is sometimes also necessary to characterize concrete included in existing structures. In this case, test specimens are obtained by core drilling, and the investigation is conducted with the requirement to maximize the number of parameters obtained while minimizing the number of test specimens drilled from the structure. This paper focuses on the mechanical fracture parameters of core-drilled specimens taken from a selected concrete structure. Tests were performed on cylindrical specimens with a chevron-notched stress concentrator in the three-point bending configuration in order to determine modulus of elasticity, fracture toughness and fracture energy. Subsequently, theoretical compressive strength was estimated and tests for the determination of compressive strength values were performed focusing on dependence on the slenderness ratio, i.e. the relationship between the compressive strength and the length to diameter ratio of the cylindrical specimens. In relation to the obtained mechanical fracture parameters, selected specimens were analysed and three-dimensionally characterized via high-resolution X-ray computed tomography.

Klíčová slova

concrete drill-core;fracture parameters;compressive strength;slenderness ratio;X-ray computed tomography

Autoři

LISZTWAN, D.; KUMPOVÁ, I.; DANĚK, P.; FRANTÍK, P.; KERŠNER, Z.

Vydáno

21. 12. 2021

Nakladatel

IOP Publishing Ltd

ISSN

1757-899X

Periodikum

IOP Conference Series: Materials Science and Engineering

Ročník

1209

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

16

Strany počet

16

URL

https://iopscience.iop.org/issue/1757-899X/1209/1

Plný text v Digitální knihovně

http://hdl.handle.net/11012/203291

BibTex

@inproceedings{BUT175574,
  author="Dominik {Lisztwan} and Ivana {Kumpová} and Petr {Daněk} and Petr {Frantík} and Zbyněk {Keršner}",
  title="Mechanical fracture parameters of concrete drill-core specimens supported by a slenderness ratio study",
  booktitle="IOP Conference Series: Materials Science and Engineering",
  year="2021",
  journal="IOP Conference Series: Materials Science and Engineering",
  volume="1209",
  pages="1--16",
  publisher="IOP Publishing Ltd",
  doi="10.1088/1757-899X/1209/1/012042",
  issn="1757-899X",
  url="https://iopscience.iop.org/issue/1757-899X/1209/1"
}