Combining NDT techniques for improved evaluation of concrete properties

Developing a strategy for the management and maintenance of the built heritage is a key challenge for research. In this context, a large experimental program was implemented to develop a methodology for non-destructive testing (NDT) of concrete structures based on the determination of: (a) the sensitivity of the NDT techniques, (b) the uncertainty of the NDT measurements, and (c) the optimal combination of NDT techniques to enhance the evaluation of concrete properties. This paper presents the strategy employed and the first results obtained from a comprehensive experimental database of NDT techniques. It also emphasizes how the variability of measurements can be taken into account and how statistical analyses can be used to evaluate the relevance of the available NDT techniques.