Assessment of Concrete Strength Using the Combination of NDT—Review and Performance Analysis

This paper presents a review on combining NDT techniques, such as rebound hammer and ultrasonic pulse velocity, for assessing concrete compressive strength. These methods, though being favorably not invasive easy to be extended larger number of elements, are affected by many contingency factors. The SonReb technique suggests the two methods partially offset their low reliability if considered separately. For years, this concept was introduced in order improve evaluation compared with use one NDT. In combine velocity hammer, empirical, multiparametric models were proposed literature linear, power, exponential, or polynomial. However, variety these emphasizes that they can give correct strength prediction only particular cases derived for. Therefore, assess site, should predicted using calibration procedure due variability existing mixes. brief outline key aspects assessment, including different approaches used build model A comparison study between is proposed, performance analysis Monte Carlo simulations discussed. Finally, estimation capacity identification investigated, effect “trade-off” analyzed random sampling varying cores.