1. Microwave NDT of cement-based materials using far-field reflection coefficients
- Author
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Vikram R. Melapudi, Satish S. Udpa, Kavitha Arunachalam, and Lalita Udpa
- Subjects
Engineering ,business.industry ,Mechanical Engineering ,Mechanical engineering ,Structural engineering ,Condensed Matter Physics ,Strength of materials ,Nondestructive testing ,Destructive testing ,Reflection (physics) ,General Materials Science ,Structural health monitoring ,Reflection coefficient ,business ,Energy source ,Microwave - Abstract
Periodic assessment of ageing civil structures is important for structural integrity and public safety. Numerous destructive and non-destructive techniques employing different energy sources have been proposed for structural health monitoring. Amongst the non-destructive evaluation techniques proposed for monitoring material strength and contents of concrete structures, techniques employing microwaves offer distinct advantages in that they are non-radioactive and provide good penetration, excellent contrast between steel reinforcement bar and concrete, and insensitivity to ambient temperature. In this paper, the feasibility of a far-field microwave NDE technique for concrete imaging is investigated via numerical simulations and experiments on cement based samples using far-field microwave reflection coefficients.
- Published
- 2006
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