NDT Of Concrete Structures

NON DESTRUCTIVE TESTING OF CONCRETE STRUCTURES

Rebound Hammer Testing :
This is one of the most primitive and simplest test to evaluate strength of concrete. Although results using this test vary significantly based on surface, carbonation and variety of other factors, some consultants / clients prefer to use it primarily due to its speed and ease of use.

Geo Dynamics offers this test using a rebound hammer for use on project sites. The test is based on the principle that the rebound of an elastic mass depends upon the hardness of the surface it strikes. The results are expressed in terms of rebound number and then converted to concrete strength.

Ultrasonic Pulse Velocity Testing :
This is also a very simple Non Destructive Test used to evaluate quality of concrete and cracks or defect if any. Note that it is difficult to establish grade of concrete using UPV, unless a calibration is established on site using concrete cubes or cores. The method consists of transmitting a wave of fixed frequency through an emitter and a receiver at the other end of the section is used to record the wave. Knowing the travel time displayed on the equipment the UPV value can be calculated. Further interpretation can be based on the basis of series of such results on the structure.

We are equipped with an Ultrasonix 4600 Equipment that conforms to BS: 4408 and ASTM C:597 and also IS:13311 Part (1)-1992. We have already used it on many flyovers, bridges and buildings to ascertain concrete quality to the satisfaction of our clients and consultants.