1. GERMANN INSTRUMENTSGI IMPACT-ECHO TESTING for DELAMINATIONS IN THE WALLS OF A MARINE STRUCTURE Author Claus Germann Petersen, In-Situ Testing of Copenhagen Ltd.

2. GERMANN INSTRUMENTSGI IMPACT-ECHO

3. GERMANN INSTRUMENTSGI Impact-Echo Test Record

4. GERMANN INSTRUMENTSGI Impact-Echo Wave Speed Record

5. GERMANN INSTRUMENTSGI Cross-section of the marine walls

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12. GERMANN INSTRUMENTSGI VERIFICATION 50 cores were drilled out in areas found to be solid and delaminated All cores confirmed the impact-echo test results

13. GERMANN INSTRUMENTSGI SUMMARY The 4 walls tested covered an area of 1440 m2 A total of 6500 impact-echo were performed with the DOCter impact-echo test system in one week by a two-man crew Delaminations were found in one wall The testing performed well in extreme harsh winter weather conditions, close to the sea level The test results were confirmed by a limited amount of cores