This paper presents the preliminary results of several experiments that were conducted to evaluate the potential of microwave nondestructive testing as a tool for detection/evaluation of properties associated with concrete structures. These controlled experiments were aimed at studying aggregate size distribution and strength (water to cement ratio). Using microwave reflectometers at 4 and 9.5 GHz, studies of the characteristics of the magnitude of reflection coefficient as a function of concrete ...
The deterioration and aging of the public infrastructure - including buildings, roads, pavements, and other concrete structures - has been of considerable national concern recently. Inspection techniques generally rely on destructive tests of core samples taken from the structure. These techniques fall short in identifying structural strength in regions far removed from where the samples are taken. This article describes an electromagnetic method using radar to determine the orientation of ...
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