Publication detail

Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test

KOCÁB, D. MISÁK, P. CIKRLE, P.

Original Title

Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test

Type

journal article in Web of Science

Language

English

Original Abstract

During the construction of concrete structures, it is often useful to know compressive strength at an early age. This is an amount of strength required for the safe removal of formwork, also known as stripping strength. It is certainly helpful to determine this strength non-destructively, i.e., without any invasive steps that would damage the structure. Second only to the ultrasonic pulse velocity test, the rebound hammer test is the most common NDT method currently used for this purpose. However, estimating compressive strength using general regression models can often yield inaccurate results. The experiment results show that the compressive strength of any concrete can be estimated using one’s own newly created regression model. A traditionally constructed regression model can predict the strength value with 50% reliability, or when two-sided confidence bands are used, with 95% reliability. However, civil engineers usually work with the so-called characteristic value defined as a 5% quantile. Therefore, it appears suitable to adjust conventional methods in order to achieve a regression model with 95% one-sided reliability. This paper describes a simple construction of such a characteristic curve. The results show that the characteristic curve created for the concrete in question could be a useful tool even outside of practical applications.

Keywords

Rebound hammer;SilverSchmidt;concrete;compressive strength;non-destructive testing

Authors

KOCÁB, D.; MISÁK, P.; CIKRLE, P.

Released

23. 8. 2019

Publisher

MDPI

Location

Basel, Switzerland

ISBN

1996-1944

Periodical

Materials

Year of study

12

Number

17

State

Swiss Confederation

Pages from

1

Pages to

17

Pages count

17

URL

https://www.mdpi.com/1996-1944/12/17/2705

Full text in the Digital Library

http://hdl.handle.net/11012/181100

BibTex

@article{BUT158157,
  author="Dalibor {Kocáb} and Petr {Misák} and Petr {Cikrle}",
  title="Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test",
  journal="Materials",
  year="2019",
  volume="12",
  number="17",
  pages="1--17",
  doi="10.3390/ma12172705",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/12/17/2705"
}