G01N 27/20, G01N 27/82, G01N 27/9006, G01N 27/902, G01N 27/9046, G01N 33/383, E04C 5/10, G01R 33/028, G01R 33/10, G01R 33/12
An exemplary method of indicating a condition of grout within a post-tensioned tendon involves positioning a magnet and a metallic sensing plate in close proximity to an outer surface of the post-tensioned tendon; rotating the magnet and the metallic sensing plate around the outer surface of the post-tensioned tendon; measuring an amount of magnetic forces applied to the magnet during rotation of the magnet around the post-tensioned tendon; measuring an impedance between the metallic sensing plate and metallic strands within the post-tensioned tendon during rotation of the metallic sensing plate around the post-tensioned tendon; and generating 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 measurement data using the magnet and the metallic sensing plate.
Sagues, Alberto A.; Freij, Hani; Dukeman, David Adam; and Alexander, Christopher Lewis, "System and method for imaging tendon cross sections for detecting voids and other deficiencies in grouted external tendons" (2023). USF Patents. 1340.
UNIVERSITY OF SOUTH FLORIDA