MEASUREMENT Of UrrRASONIC PULSE VELOCITY IN CONCRETE fOR ASSESSING COMPRESSIVE STRENGTH

Abstract

Evaluating in-place compressive strength of concrete by employing non-destructive testing method is a cardinal approach to assess concrete strength in present condition. But strength cannot be measured because non-destructive tests are relative in nature. So indispensability arises for establishing experimental relation between the property being measured by a given test and the strength of the specimen. Concrete strength increases with time due to curing but when its use being started, environmental exposure may also deteriorate its strength. To assess the concrete strength in present condition of a structure ultrasonic pulse velocity method is used among all other non-destructive methods in order to find a correlation with concrete compressive strength. Therefore. to derive such correlation and evaluating its reliability using local material and local condition is important for judging the concrete. Finally, further observations are made on effect of concrete age and coarse aggregate which are known to be the most important parameters that affect the correlation.