Detail publikace

DETERMINATION OF HIGH PERFORMANCE CONCRETE STRENGTH BY MEANS OF IMPACT HAMMER

BROŽOVSKÝ, J. PROCHÁZKA, D. BENEŠ, D.

Originální název

DETERMINATION OF HIGH PERFORMANCE CONCRETE STRENGTH BY MEANS OF IMPACT HAMMER

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Currently, in civil engineering, high performance concrete i.e. concretes whose minimum compression strength is equal or more than 65 MPa are increasingly used. Side effect of it is need for determination of their construction strength. In particular, recently built high performance structures suffer from sampling of drill cores. Therefore, noninvasive impact hammers - to be specific Schmitt impact hammer - were used for determination of structural concrete strength. However, efficiency of calibration correlation using impact hammer volume indicated in standards (e.g. EN 137914, CSN 731373) or by impact hammer manufacturers is disputable since these correlations were developed at the time such concretes were uncommon. This paper indicated calibration correlations as elaborated for high performance concretes class C 55/67 to C 80/95; 2 to 60 days old, for Schmidt impact hammer type N & L. Calibration correlations generated feature high degree of correlation and practical utility. Moreover, these calibration correlations here are compared with correlations given for concrete strength calculation as stated by technical standards, and impact hammer manufacturer; this implies that these correlations indicated in EN 13791, CSN 731373 and declared by impact hammer manufacturer are inapplicable for determination of high performance concrete strength by means of impact hammer

Klíčová slova

Impact hammer testing, Stength, Concrete, Hight Performace Concete, Calibration relation

Autoři

BROŽOVSKÝ, J.; PROCHÁZKA, D.; BENEŠ, D.

Rok RIV

2009

Vydáno

1. 10. 2009

Nakladatel

Rolf Dieterich, NDT.net

Místo

Spolková republika Německo

ISSN

1435-4934

Periodikum

The e-Journal of Nondestructive Testing

Ročník

14

Číslo

10

Stát

Spolková republika Německo

Strany od

1

Strany do

9

Strany počet

9

BibTex

@article{BUT48987,
  author="Jiří {Brožovský} and David {Procházka} and Dalibor {Beneš}",
  title="DETERMINATION OF HIGH PERFORMANCE CONCRETE STRENGTH BY MEANS OF IMPACT HAMMER",
  journal="The e-Journal of Nondestructive Testing",
  year="2009",
  volume="14",
  number="10",
  pages="1--9",
  issn="1435-4934"
}