Construction Program - Civil Engineering

1. Rebar Detector
Non Destructive Test)CE 550 )

2. OUTLINE
 HISTORICAL
 INTRODUCTION
• Non Destructive Test
• Rebar Detector
 MORE INFORMATION
 SIGNIFICANCE
 MECHANISM
 APPARATUS
 PROCEDURE

3. • These advanced inspection techniques can
be expensive due to the need of having
professionally trained technicians to perform
the testing and to acquire and analyze the
inspection results. Examples of NDT
techniques that can be used for rebar
location are ground-penetrating radar (GPR)
and magnetic devices such as cover meters
HISTORICAL

4. • The researchers performed a literature review of
the primary techniques for use to detect steel
rebar embedded in concrete structures. Three
methods were identified: nuclear, magnetic and
ground penetrating radar method. For each
method, principles and advantages and
disadvantages were is cussed.
• After performing a detailed literature review and
understanding both advantages and limitations of
each rebar locator method, the researchers decided
to focus on detecting cover meters devices
available on the market.

5. • Non Destructive Testing (NDT) methods are
popular for routine inspection of bridge
members. With the ability of new highly
technical systems, some of these NDT techniques
can be used for reinforcing steel rebar location in
concrete bridge decks without destruction of the
members being tested. Use of these techniques
has the ability to minimize traffic restrictions
related to field data collection and to improve
design and asset management..
Non Destructive Test

6. Rebar Detector
• Rebar detector is one of the NDT, which are used
to locate the steel bar embedded in concrete before
drilling and before taking core test.
• It is the easiest and fastest ways for detecting
reinforcing bar in concrete. It is widely used before
coring or drilling holes to find “safe spots” .
• It will indicate rebar location, direction and also
will give an indication of the depth of concrete
cover.

7. More information
• The rebar detection instrument (Profoscope) has a
unique real-time visualization mechanism,
allowing the contractor to actually see the location
of rebar's beneath the concrete surface. The
(Profoscope+) features data storage for automatic
collection of data to make rebar detection more
efficient. The (Profometer 5+) combines rebar
detection and measurement of concrete cover and
bar diameters in one instrument.

8. Profoscope
The fully integrated
Profoscope for quick and
easy rebar detection.

9. Profoscope +
The Profoscope+ has the same
features as the Profoscope,
but additionally offers the
innovative memory function
for data acquisition.

10. Profometer 5+
The Profometer 5+ is an
advanced device for the
non destructive detection
of rebars and for the
measurement of concrete
cover and bar diameters.

11. Profometer PM-600 / 630
The Profometer PM-600 /
630 are advanced cover
meters which come with
the new generation
Profometer Touch screen
unit.

14. SIGNIFICANCE
• Hitting a rebar however boring into the reinforced
concrete moreover taking core may be destroy the
drilling instrument and can severely weaken the
concrete structure.
• An instrument for rebar detection that quickly and
accurately determines the location of the
reinforcing bars in the concrete.

15. MECHANISM
• A rebar detector works on the principle that the
steel within the concrete will be affected by a
magnetic field that is applied by the detector.
• By assuming a set magnetic property for all steel
reinforcing bars and using a given bar size, the
detector can predict the depth and location of the
reinforcing bars.

17. • The signal received will increase with increasing
bar size and decrease with increasing cover.
• To locate the bar position, the distance to the bar is
minimized, indicating that the rebar detector is
directly over a piece of the reinforcing steel.

18. APPARATUS
• Rebar detector (Micro Cover Meter)
• Ruler
• Marker

19. PROCEDURE
• The instrument is laid at the surface of the column
or slab.
• An Instrument is moving from the left to right and
then from the bottom to up to get the position of
the reinforcement.
• Once the location of rebar are found, a masonry
drill is used to locate the total cover to the rebar.