Publication detail

Characterization of old/repairing structural concrete through mechanical fracture parameters.

ŠIMONOVÁ, H. DANĚK, P. FRANTÍK, P. SEDLMAJER, M. KERŠNER, Z.

Original Title

Characterization of old/repairing structural concrete through mechanical fracture parameters.

Type

conference paper

Language

English

Original Abstract

Structural concrete of the building of Vítkovice railway station from 1970s and repairing concrete are characterized via mechanical fracture parameters. Together twelve core-drilled cylindrical specimens with diameter of 75 mm were provided by a Chevron type notch of depth of 12 mm. Three-point bending fracture tests were conducted on these specimens supported as beams with the span of 170/180 mm. Load vs. deflection and load vs. crack mouth opening displacement diagrams were recorded from which modulus of elasticity (E), fracture toughness (KIc) and fracture energy (GF) were determined using linear elastic fracture mechanics approach and work-of-fracture method. Mean values (coefficient of variation) of these parameters for old/repairing concrete were obtained as follows: E = 39.4/39.9 GPa (29/15 %), KIc = 0.90/1.38 MPa·m1/2 (19/13 %), GF = 174.0/116.4 J/m2 (26/19 %).

Keywords

concrete, old/repairing, fracture parameters, core drill

Authors

ŠIMONOVÁ, H.; DANĚK, P.; FRANTÍK, P.; SEDLMAJER, M.; KERŠNER, Z.

Released

31. 8. 2017

Publisher

Hungarian Group of fib

Location

Budapest

ISBN

978-963-12-9651-8

Book

Proceedings of the 12th Central European Congress on Concrete Engineering ‒ Innovative materials and technologies for concrete structures

Pages from

481

Pages to

486

Pages count

6

BibTex

@inproceedings{BUT139161,
  author="Hana {Šimonová} and Petr {Daněk} and Petr {Frantík} and Martin {Sedlmajer} and Zbyněk {Keršner}",
  title="Characterization of old/repairing structural concrete through mechanical fracture parameters.",
  booktitle="Proceedings of the 12th Central European Congress on Concrete Engineering ‒ Innovative materials and technologies for concrete structures",
  year="2017",
  pages="481--486",
  publisher="Hungarian Group of fib",
  address="Budapest",
  isbn="978-963-12-9651-8"
}