Limitations
- Great care should be exercised, however, in using pulse velocity measurements for these purposes since it is often difficult to interpret results. Sometimes the pulse does not travel through the damaged portion of the concrete.
- Accuracy depends on careful calibration and use of the same concrete mix proportions and aggregate in the test samples used for calibration as in the structure.
- Does not respond to shapes which have regular frequency response in the audio frequency range e.g. a sphere.
- Need to avoid path arrangement which contains steel reinforcing bars since pulse velocity measurements made in the vicinity of reinforcing steel may be high.