Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2707

Full Length Research Paper

Application of statistical techniques to evaluate the reliability of ultrasonic and rebound hammer measurements of compressive strength in the concrete of bridges

Carvalho, C. H.
  • Carvalho, C. H.
  • Federal Institute of Sergipe, Graduate Program in Materials Science and Engineering of the Federal University of Sergipe – UFS, Brazil.
  • Google Scholar
Severo Junior, J. B.
  • Severo Junior, J. B.
  • Department of Chemical Engineering, Federal University of Sergipe – UFS, Brazil.
  • Google Scholar
Macedo, M. C. S. S.
  • Macedo, M. C. S. S.
  • Department of Materials Science and Engineering, Federal University of Sergipe – UFS. Federal University of Sergipe, Marechal Rondon ave , Jardim Rosa Elze, São Cristovão, Zip Code: 49100-000, Sergipe, Brazil.
  • Google Scholar
Griza, S.
  • Griza, S.
  • Department of Materials Science and Engineering, Federal University of Sergipe – UFS. Federal University of Sergipe, Marechal Rondon ave , Jardim Rosa Elze, São Cristovão, Zip Code: 49100-000, Sergipe, Brazil.
  • Google Scholar
de Andrade, C. E. C.
  • de Andrade, C. E. C.
  • Department of Materials Science and Engineering, Federal University of Sergipe – UFS. Federal University of Sergipe, Marechal Rondon ave , Jardim Rosa Elze, São Cristovão, Zip Code: 49100-000, Sergipe, Brazil.
  • Google Scholar
dos Santos, A. A.
  • dos Santos, A. A.
  • Department of Materials Science and Engineering, Federal University of Sergipe – UFS. Federal University of Sergipe, Marechal Rondon ave , Jardim Rosa Elze, São Cristovão, Zip Code: 49100-000, Sergipe, Brazil.
  • Google Scholar
Barreto, L. S.
  • Barreto, L. S.
  • Department of Materials Science and Engineering, Federal University of Sergipe – UFS. Federal University of Sergipe, Marechal Rondon ave , Jardim Rosa Elze, São Cristovão, Zip Code: 49100-000, Sergipe, Brazil.
  • Google Scholar


  •  Received: 22 November 2013
  •  Accepted: 10 March 2014
  •  Published: 30 March 2014

Abstract

In order to assess the uncertainties in the experimental measurements, the use of statistical error analysis is essential for a reliable technical diagnosis on structural safety in reinforced concrete of bridges. Two non-destructive techniques (ultrasound and rebound hammer) were performed, resulting in conflicting technical diagnostics when analyzed without the study of the variability of experimental errors. It was evident that physically the only use of arithmetic average means nothing. The obtained results also demonstrated the lack of correlations between those ones driven by the ultrasound and the impact hammer on the four tested bridges.

 

Key words: Rebound hammer, ultrasound, compressive strength, nondestructive tests, statistical error analysis.