Applied Microwave
Nondestructive Testing
Laboratory (amntl)
210 Engineering Research
Laboratory
500 W. 16th St.
Rolla, MO 65409-0040
(573)-341-4728
TheApplied Microwave Nondestructive Testing Laboratory (amntl) is located in the Electrical and Computer Engineering Department at Missouri University of Science and Technology. |
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Major activities in this laboratory include both basic R&D and applied research in the field of Microwave and Millimeter Wave Nondestructive Testing and Evaluation. Examples of recent investigations are:
- Detection and sizing of small changes (in the few micrometer range) in dielectric sheet materials,
- Detection of minute voids and delaminations in stratified (sandwich) composites,
- Estimation of void and delamination location within thick sandwich composites,
- Detection of internal flaws and defects in thick composites including moisture permeation,
- Fatigue crack detection and sizing on metal surfaces, using three distinct approaches,
- Detection of surface anomalies in metals (i.e., rolled),
- Inspection and imaging of thick composites,
- Porosity estimation in composites and ceramics,
- Cure state monitoring of various chemically produced materials (i.e., resin binder, rubber, etc.),
- Detection and evaluation of corrosion under paint and composite laminates,
- Cure-state monitoring in cement-based materials (i.e., cement paste, mortar and concrete),
- Determination of water-to-cement ratio (w/c) in fresh cement paste, mortar and concrete,
- Determination of water-to-cement ratio (w/c) in hardened (cured) cement paste, mortar and concrete,
- Determination of sand-to-cement ratio (s/c) in mortar,
- Determination of coarse aggregate-to-cement ratio (ca/c) in concrete,
- Evaluation of aggregate segregation in concrete,
- Detection of grout-filled cells in masonry blocks,
- Evaluation of concrete compressive strength,
- Evaluation of porosity in mortar,
- Detection and evaluation of chloride added to the mixing water of cement-based materials,
- Detection of cyclical chloride ingress in mortar,
- Detection and sizing of delamination between FRP composites and cement-based materials,
- Hybrid measurement technique using embedded modulated scattering PIN diode-loaded dipole antenna for material characterization, material characterization and microwave imaging,
- Near-filed microwave imaging,
- New application being discovered continuously.
The amntl is fully equipped with microwave and millimeter wave equipment including sweep oscillators and other solid state generators; vector network analyzers; various waveguide and coaxial components, etc.
In addition the laboratory is equipped with two fully automated and computer-controller 2-D scanning tables for imaging purposes, and two fully automated and computer-controlled linear scanning platforms. |
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