Abstract:
This article presents a method for assessing the quality of the
reinforcement of reinforced concrete structures with carbon
fiber sheets using radar wave inspection. This research aimed
to discuss the nature of the debonding between the
reinforcement material and the structural concrete surface.
Simulate the debonding characteristics of the reinforcement
work with 3 different sizes of 4 mm thin foam pads to simulate
the damage characteristics of different reinforcement systems.
with sizes of 100x100, 40x40, and 20x20 mm. It was installed
on a column with a cross-section of 200x200 mm., and a
height of 1.0 m. The column was reinforced with a surfacemounted
carbon fiber sheet, and the test was carried out using
the Hilti-PS 1000 X-Scanner radar probe. with a transmission
center frequency of 2.0 GHz. Subsequently, the radar signal
data was processed from the test results. The dielectric
constant is the electromagnetic property of the appropriate
object. The study found limitations in the use of radar waves in
foam sheet detection due to the small difference in dielectric
constant between the medium and the foam sheet. This
affects the consideration of the characteristics of the foam
sheet that simulates the debonding of repair work within the
scan results. Coupled with the conductivity of the carbon fiber
sheet, the radar wave is absorbed and cannot pass through the
carbon fiber sheet. As a result, the position and magnitude of
the debonding in the carbon fiber reinforcement system with
radar waves cannot be assessed as a result