Effect of applied load on the nondestructive measurement of concrete strength

E. Mahmoudabadi; U. Amjad; T. Kundu; H. Saadatmanesh

doi:10.1117/12.2045336

9 March 2014 Effect of applied load on the nondestructive measurement of concrete strength

E. Mahmoudabadi, U. Amjad, T. Kundu, H. Saadatmanesh

Proceedings Volume 9064, Health Monitoring of Structural and Biological Systems 2014; 90641R (2014) https://doi.org/10.1117/12.2045336
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Nondestructive measurement of the concrete strength is an important topic of research. Among different nondestructive testing (NDT) methods the ultrasonic pulse velocity (UPV) technique is the most popular method for concrete strength estimation. While measuring concrete strength by this method almost all researchers have neglected the effect of applied stress or load on the concrete member. In this investigation attempts were made to properly incorporate the effect of the applied load on the strength prediction of concrete specimens from UPV value. To achieve this goal, 4 groups of concrete specimens with different values of final strength were made. Materials used for making cylindrical specimens of 3 inch diameter and 6 inch height included regular Portland cement, water and two types of aggregate - fine and coarse. After applying the load on the specimen in multiple steps – up to 70% of its failure strength f_c'- the time of flight (TOF) value was measured for every loading step. The recorded results showed that applied load on the member has significant effect on the measured UPV value on concrete specimens. Therefore, to find the strength of the concrete from the UPV value, the applied load on the sample should be considered as an important factor that cannot be neglected.

Citation Download Citation

E. Mahmoudabadi, U. Amjad, T. Kundu, and H. Saadatmanesh "Effect of applied load on the nondestructive measurement of concrete strength", Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 90641R (9 March 2014); https://doi.org/10.1117/12.2045336

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