System and method for imaging tendon cross sections for detecting voids and other deficiencies in grouted external tendons

A system for indicating a grout condition within a post-tensioned tendon, the system comprising:

• a force measuring sensor that provides data indicating magnetic forces applied to a magnet;
• an impedance sensor that provides measurement data involving an impedance between a metallic sensing plate and metallic strands within the post-tensioned tendon;
• a mechanism adapted to mount to the post-tensioned tendon and position the magnet and the metallic sensing plate in close proximity to an outer surface of the tendon, the mechanism further being adapted to facilitate moving of the magnet and the metallic sensing plate around the outer surface of the post-tensioned tendon;
• and
• a computing device that is configured to generate an image of a cross-section of the post-tensioned tendon indicating one or more grout conditions in spatial proximity to the metallic strands within the post-tensioned tendon based on at least data provided by the impedance sensor and the force measuring sensor.