Background: Highway agencies explore the use of non-destructive testing (NDT) for assessing condition their infrastructure in most cost-effective manner. NDTs can provide as-built construction quality, as well service assessment especially older structures where some critical information and/or maintenance records are often not available. In many cases, requires “ground true” data either calibr...

Abstract Reinforced concrete bridges with post‐tensioned cables are particularly critical structures, as the degradation of tendons is not fully detectable through conventional investigation methods and/or visual inspections, due to intrinsic nature structural typology. After shortly reviewing main applications current non‐destructive (ND) available for investigating deterioration and grout, pa...