How Do You Test For Rebar In Concrete

Reinforcement engineering is an important aspect of concrete construction. At the site, in order to pursue progress and save costs, the construction unit may shoddy the use of steel bars or even cut corners, resulting in low quality of reinforced concrete and may be buried for future engineering operations unsafe hidden dangers.

Reinforcement engineering is a concealed project. Once the pouring is completed, we cannot visually check whether the steel in the concrete meets the design and specification requirements. Methods such as drilling, shaving, etc. are often destructive and cannot be used in a wide range.

Is there a way to detect the reinforcement, the spacing and the thickness of the protective layer without destroying the concrete? Rebar detectors can be achieved! ! !

The rebar detector is detected by electromagnetic induction method: the position of the steel bar in the concrete structure or component, the thickness of the protective layer and the diameter of the steel bar or the number, direction and distribution of the detected steel bars; and the detection of magnetic bodies and electrical conductors in non-magnetic and non-conductive media, such as the detection of cables and plumbing pipes in the wall. The following is the rebar detector specific testing process:

Instrument connection

Connect the main unit to the sensor, the main unit and the path unit with a signal cable, and tighten the plug fixing screws.

Each time the probe is replaced, it should be connected before starting the machine so that the rebar detector can determine the probe.

Boot and preset

Press the (on/off) button to turn the rebar detector on and automatically enter the options menu. Then preset the diameter of the reinforcement and the thickness of the protective layer.

Reset

When testing the interface, pick up the sensor and put it in the air, leave the surface of the  member and the magnet body, and press the OK button. (Over 3S, the reset operation is completed.)

Rebar position and thickness of protective layer

The sensor is parallel to the reinforcing bar, and the path device is placed perpendicular to the measured reinforcing bar at the starting position of the measuring area, and the path device is pushed to move along the vertical reinforcing bar surface of the crucible surface.

During the movement, the indicator bar grows, indicating that the probe is moving toward the position of the reinforcing bar. When the reinforcing bar axis and the signal sensor center line coincide, the indicator bar is the longest and the protective layer has the smallest thickness. After pressing the button, the rebar detector displays the diameter of the reinforcing bar and the thickness of the protective layer, press the storage button to save the diameter of a set of steel bars and the thickness of the protective layer.

At the same time, mark the axial position of the steel bar. After testing the thickness of the protective layer of the test area, the spacing of the adjacent adjacent reinforcing bars is measured in turn.