Nitto CTS-02V4, Руководство пользователя

Страница: 15 / 37

Nitto Construction
- 15 -

Waveform of impact force when
hammering on the surface of concrete
with delamination: Case 2
This waveform can be observed when the
concrete is about to detach when
hammering. The normal waveform cannot be
obtained because the reactive force is not
generated when hammering. Note that the
horizontal axis (time axis) is totally different
from the other waveforms.

Waveform of impact force when
hammering on the concrete with the
aggregate delamination
This waveform can be obtained when
hammering the concrete surface with the
aggregate delamination caused by freezing
and thawing action or running water action.
Many local peaks are observed and cause a
jagged waveform pattern. It is thought to be
due to repeat the phenomena
that the
hammer impacts on the aggregate and the
aggregate breaks down. The concrete surface
for obtaining such waveform is shown below.
0
200
400
600
800
1000
1200
0 500 1000 1500 2000
Fo
rc
e
Time(μs)
0
200
400
600
800
1000
1200
0 200 400 600 800 1000
Force
Time(μs)