Patent ID: 7519146

Claim:
A method of obtaining radioactive energy curve for a reinforced concrete, comprising steps of: (a) obtaining reinforced concretes having various thicknesses then selecting one from said reinforced concretes, said reinforced concrete having a steel bar; (b) obtaining a radioactive detecting device having a penetrative radiation source; (c) radiating a penetrative ray having a radiation intensity from said penetrative source on said reinforced concrete for various durations of time to obtain images of said reinforced concrete; (d) examining said images for clearness of said steel bar in said reinforced concrete to obtain a qualified image; (e) obtaining a preferred duration for said qualified image; (f) processing the other reinforced concretes through step (c) to step (e) separately; (g) obtaining records for said reinforced concretes separately, said record comprising a radiation intensity, a preferred duration and a thickness of reinforced concrete; and (h) obtaining a radioactive energy curve for said steel bar in said reinforced concrete.