In a factory, when holes were drilled down on concrete beams to place the anchor bolts to support vibrating machines, air voids were found. However, the problem is, the location of the air void was unknown. The possibilities were that the air void was at drilling locations coincidently, was at some other locations or was distributed over the entire beam length. Thus, the Air Void Detection Test was conducted to locate the air void inside RC beams. Once void locations were detected along the beams, reparation was carried out to enhance concrete durability and the beam’s strength as well as to ensure firm support for machine operation.
To conduct the test, several tools were used including a drop hammer, accelerometers and a data acquisition system.