- since 1996 -
|NDT.net Issue - 2015-12 - NEWS |
Management of the nation’s aging transportation infrastructure constitutes a growing financial burden. Limited resources are available for inspection, maintenance, repair, rehabilitation and replacement of the deteriorating infrastructure. More efficient management of the aging concrete-based transportation infrastructure, enabled by thorough and practical condition assessment techniques, would allow for effective use of available resources to maintain a viable transportation system. Condition assessment of the vast concrete-based transportation infrastructure is challenged by the complex structure and deterioration mechanisms of concrete, and the complicating effects of surface treatments. Development of compact, lightweight and economically viable equipment for implementing some analytical chemistry methods (e.g., XRD, NMR, XRF, FTIR) have facilitated their growing semi-destructive or nondestructive field applications (e.g., in the field of geology). Initial efforts to make direct use of these methods for semi- or non-destructive field evaluation of concrete, however, have encountered challenges associated with the heterogeneity of concrete structure, and the complexity of concrete structure and deterioration mechanisms.