The practical use of ultrasonic pulse velocity measurements in the assessment of concrete quality

Abstract

Synopsis The wider use of limit-state methods for the design of structures has increased the desirability of being able to assess the quality of a structure as built rather than isolated test pieces of the material supplied. Ultrasonic pulse velocity measurements are a particularly suitable way to measure the quality of a concrete structure, although the importance of competent engineering judgement in their analysis must be properly stressed. This paper indicates some ways in which the pattern of pulse velocity measurements may be used to assess the quality of concrete construction. The suggested patterns have been derived by applying the fundamental relationships, obtained by research, to site surveys and assessing the deviations permissible before the variations from the normal indicate a defect of engineering significance. The comparative evaluation of structural strength is also discussed.