Elastic wave methods for NDE in concrete based on generalized theory of acoustic emission

As applications of the techniques, on-site measurements in concrete structures are discussed. This is because the long service-life of infrastructure is to be an evolutional target. Deterioration due to aging and damage due to disasters in concrete structures have updated the urgent demand for inspection and maintenance. In order to extend the service life of the concrete structures, on-site NDE techniques are to be developed for diagnosis and prognosis. Successful applications are updated and summarized.