TY - JOUR A1 - Tinkey, Y. A1 - Olson, L.D. A1 - Wiggenhauser, Herbert T1 - Impact Echo Scanning for Discontinuity Detection and Imaging in Posttensioned Concrete Bridges and Other Structures JF - Materials evaluation KW - Impact-Echo KW - NDT KW - Civil Engineering PY - 2005 UR - http://www.ultrasonic.de/article/v04n05/plakat22/plakat22.htm SN - 0025-5327 VL - 63 IS - 1 SP - 64 EP - 69 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-7335 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -