Publication detail

Non-destructive Schmidt Rebound Hammer Evaluation of the Degradation of Concrete Exposed to High Temperatures

ROZSYPALOVÁ, I. DANĚK, P. SACHR, J. KAREL, O.

Original Title

Non-destructive Schmidt Rebound Hammer Evaluation of the Degradation of Concrete Exposed to High Temperatures

Type

abstract

Language

English

Original Abstract

Concrete suffers significant changes in its internal structure due to fire exposition. Chemical and physical transformations cause further changes in its properties. The research focuses on non-destructive Schmidt rebound hammer testing of experimental concrete panels exposed to high temperature. Five concrete panels with the dimensions of 2300 × 1300 × 150 mm were made from concrete of ordinary fire-resistance. According to the standard temperature curve in EN 1991-1-2, the specimens were heated up to the target temperature (550, 600, 800 and 1000 °C) and afterwards, the given thermal load was maintained for 60 more minutes. The equation of the standard temperature curve represents a common fire by which a building structure may be affected in rare cases. The rebound hammer SilverSchmidt L and Original Schmidt N was used for determining the rebound number. Rebound number area charts of all experimental panels were created in order to identify most damaged areas of the concrete due to the effects of high temperatures. Differences between values of destructive and non-destructive compressive strength were determined.

Keywords

Concrete, high temperature, rebound hammer, Original Schmidt N, SilverSchmidt L, compressive strength

Authors

ROZSYPALOVÁ, I.; DANĚK, P.; SACHR, J.; KAREL, O.

Released

23. 11. 2017

Publisher

ČVUT

Location

Praha

ISBN

978-80-01-06347-7

Book

Sanace a rekonstrukce staveb 2017, CRRB - 19th International Conference on Rehabilitation and Reconstrctuon of Building

Pages from

117

Pages to

117

Pages count

1

BibTex

@misc{BUT142177,
  author="Iva {Čairović} and Petr {Daněk} and Jiří {Sachr} and Ondřej {Balkanský}",
  title="Non-destructive Schmidt Rebound Hammer Evaluation of the Degradation of Concrete Exposed to High Temperatures",
  booktitle="Sanace a rekonstrukce staveb 2017, CRRB - 19th International Conference on Rehabilitation and Reconstrctuon of Building",
  year="2017",
  pages="117--117",
  publisher="ČVUT",
  address="Praha",
  isbn="978-80-01-06347-7",
  note="abstract"
}