Novatest S.r.l.
Manual for Multichannel Ultrasonic Pile Integrity Tester
163
Figure F1.11 Schematic graph for arrangement of opposite measuring points
5) The test points shall be evenly arranged within the test area
and shall avoid arranged on the vent or exposed stones.
6) The calculation of rebound value conforms to the
requirements of
Rebound Method for Testing Concrete
Strength
: Firstly take out 3 smallest values and 3 greatest
values, and calculate the average value of the remaining
rebound values; the final rebound value is obtained after the
correction of angle and casting surface.
F1.2.2.2 Measurement and calculation of ultrasonic
acoustic velocity
1. Test requirements
1
）
The ultrasonic test points are arranged in the same test
area during the rebound test with 3 test points every test
area, as shown in Figure F1.11;