The applicability of sonreb method on damaged concrete

Abstract

In damaged structures, a knowledge of the value of the residual concrete strength is needed as a basis for the decision of reconstructing or repairing and for the design of the repair project. In this work, the limits of applicability of the Sonreb method, a combination of the ultrasonic pulse velocity and the Schmidt index measurement, in the detection of damage caused by high temperatures and chemical attack byammonium nitrate and ammonium sulphate is discussed. It is concluded that the Sonreb method can be used in assessing the fire-damaged concretes after making a classification of the degree of damage, the duration and the temperature of exposure to fire. In the case of chemical attack, a knowledge is required as to the duration of exposure and the prevailing process of corrosion.