ABSTRACT
ABSTRACT: Lower density zones can occur at longitudinal joints. On the other hand, cores extraction is time-consuming and subjected to technical and operator errors. Consequently, a challenge is the use of electromagnetic sensors. In the light of above facts, the main objectives and scopes have been confined into the analysis of the reliability and suitability for standardization of high-speed devices. In particular the potential for detecting density nonconformities especially in joints area has been investigated. In-lab and on-site experiments were designed and performed. Different measurement methods (vacuum sealing method, portable non-nuclear devices, dimensional) have been used. In the factorial plan, longitudinal versus transverse variability has been considered. On the basis of the data analyses, it was possible to perform a tentative evaluation of the reliability and of the suitability for standardization of the specific test methods. The obtained data provided information and indications for specific recommendations and for practical applications.
