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- Impact-Echo (8)
- Radar (7)
- Concrete (5)
- Non-destructive testing in civil engineering (4)
- Impact-echo (3)
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Automated NDE of post-tensioned concrete bridges using radar, ultrasonic echo and impact-echo
(2006)
Identification of short transient signals within impact-echo data using the Hilbert-Huang-Transform
(2005)
Non-destructive Testing of a Post tensioned Concrete Bridge Applying an Automated Measuring System
(2004)
In the framework of the feasibility study "Inspection of Concrete-Embedded Tracks" between BAM and Deutscher Bahn AG, application and further development of NDT- measurements for the constructional conditions of the concrete-embedded tracks are investigated.
After first test series on the rail track [Ref 1] and in further laboratory investigations on test specimen [Ref 2], result of the three selected non-destructive methods impact- echo, ultrasonic-echo and impulse radar will be presented.
The performance and reliability of NDT-CE methods must be assured to establish these methods for standard testing in construction and structure management. To develop and test NDT-methods as well as to investigate their reliability specimens with well-defined properties (defects and dimension) are needed. The design and construction of a large concrete specimen (40 m2) with various fixtures to simulate compaction faults, grouting faults and the variation of dimensions is described.