Ultrasonic Nondestructive Testing for Deterioration of High-Strength Steel Components Embedded in Concrete

This is a digest of the essential findings from the agency final report on NCHRP Project 10-30(3), Nondestructive Methods for Field Inspection of Embedded or Encased High-Strength Steel Rods and Cables, conducted by the Corrosion and Protection Centre Industrial Services (CAPSIS), University of Manchester Institute of Science and Technology, U.K. The project was initiated to develop a nondestructive testing method suitable for field inspection of bridges to detect serious deterioration of high-strength steel tendons or rods embedded in concrete. The case of posttensioned, prestressed concrete structures, with seven-wire strand steel tendons inside metal ducts, was regarded as a critical case to be addressed.