Manuale di Istruzione
Instruction Manual
21/05/2012 58-E4800 Rev. 4 EN
3.3.8 Depth of cracks
When a crack has been located, perform two readings as indicated in next figure (part 1
and part 2). One reading is taken with the heads placed in symmetrical position with
respect to the crack (2), the other with the same distance between the probes but without
defects between them (1).
The following formula can be used to calculate the depth "h"of the fault, provided the
crack is not fitted with water:
“There are a number of suggested methods and formulae for determining crack depth
using the Ultrasonic tester, the above is one of the simplest but we would suggest
reference is made to all available resources to assess the best one for your application.”
where:
x = half distance between the probes
h = crack depth (some measure unit of x)
tc = transit time across the crack (unit msec)
ts = transit time along the surface of the same type of concrete without defects (in msec)
Fig. 3-12
To Next Page
Loading...
Need help?
General