COMPLEMENTARY APPLICATION OF RADAR, IMPACT-ECHO, AND ULTRASONICS FOR TESTING CONCRETE STRUCTURES AND METALLIC TENDON DUCTS

摘要: Nondestructive testing of concrete structures plays an increasing role in civil engineering, although until now the full potential such techniques has not been tapped. For posttensioned structures, investigation tendon ducts is one most essential problems. The location ducts, determination cover and, especially, detection and quantification ungrouted areas inside are relevant questions. Recent developments opportunities radar, impact-echo, ultrasonics for presented. Although obtained results on positioning sufficient, still a matter research. Thus, new approaches this problem have to be considered. Additionally, combined use complementary offers high increase reliability results. Data will displayed application acoustic electromagne...