TY - CONF A1 - Krause, Martin A1 - Gräfe, Boris A1 - Mielentz, Frank A1 - Milmann, Boris A1 - Friese, Martin A1 - Wiggenhauser, Herbert A1 - Mayer, K. A2 - M.G. Alexander, A2 - H.-D. Beushausen, A2 - F. Dehn, A2 - P. Moyo, T1 - Ultrasonic imaging of post-tensioned concrete elements: New techniques for reliable localization of grouting defects T2 - Proceedings of the international conference on concrete repair, rehabilitation and retrofitting II PB - CRC Press CY - Boca Raton T2 - 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting CY - Cape Town, South Africa DA - 2008-11-24 KW - Post-tensioned concrete KW - Ultrasonic echo KW - Phase evaluation KW - Air-coupled ultrasound PY - 2009 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/20651 AN - OPUS4-20651 SN - 978-0-415-46850-3 SP - 521 EP - 527 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany