Localization and classification of fracture types in concrete with quantitative acoustic emission measurement techniques

The interactive forces between concrete and the steel cross-sections of the reinforcement can be investigated using the acoustic emission (AE) technique. A quantitative AE technique was developed for a comprehensive analysis of the AE waveforms including time domain and frequency. A 3D-localization as well as a classification of the events was implemented. The characterization of the fracture mechanisms is obtained by the newly developed relative moment tensor inversion method using a cluster analysis technique. This potentially improves the conclusions of AE measurements and will lead to a better way of assessing the damage of concrete.