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Correlation between Schmidt Hammer and destructive
compressions testing for concretes in existing buildings
Ferhat Aydin* and Mehmet Saribiyik
Technical Education Faculty, Sakarya University, 54187,
Campus, Adapazari, Turkey.
*Corresponding author. E-mail:
ferhata@sakarya.edu.tr.
Accepted 4 June, 2010 |
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In this study, a relationship is determined and correlated
between non-destructive testing (NDT) named as Schmidt
rebound hammer test and concrete destructive compression
test. The Schmidt rebound hammer is
principally a surface hardness tester with an apparent
theoretical relationship between the strength of concrete
and the rebound number of the hammer. In order to calibrate
the Schmidt Hammer with the various-aged concretes, cube
specimens of 28 - 90 days and a number of core samples from
different reinforced concrete structures have been tested.
This calibration has been done to get the related constant
obtained from Schmidt and compression tests. The best fit
correction factors for the concrete compressive
strength-Schmidt rebound hammer relationship are obtained
through processing correlation among the data sets. The
correction factors can be easily applied to in
situ concrete strength as well as existing concrete
structures.
Key words:
Concrete quality, compressive strength, non-destructive
tests, Schmidt. |
