Determination of Concrete Strength by Geophysical Methods

Nowadays, non-destructive testing (NDT) methods plays important role in the evaluation and testing of civil engineering structures.The aim of the study is to give basic principles of some NDT methods and their limitations in the structural evaluation programme, and provide information about agreed standards and guidelines from the interpretation of the physical data that obtained various concrete materials.Five prismatic and five cylindrical concrete specimens are produced for the purpose of the study.On the prism models, Wenner, Schlumberger, and dipole-dipole arrays used to obtain Electrical Resistivity and induced polarisation (IP) data. 2-Dimensional (2D) Resistivity and IP inversion programme used for the interpretation. On the cylinder models, Wenner and dipole-dipole arrays used to obtain data, and interpreted using 2D inversion programme.Ultrasound Pulse Velocity Method is used to determine P wave velocities of the specimens.After completion of the NDT methods Destructive Testing methods (Compressive Strength, Flexure Strength, and Splitting Tensile Strength) are conducted on the specimens.Key Words: NDT, Concrete, Electrical Resistivity, Induced Polarisation, P wave velocity, Destructive Testing