Tomography of reinforced concrete

Abstract

Tomography imaging an object is by taking measurements from slice of xy-planes or cross sections. Nondestructive mapping of the internal structures of a concrete member is a solid body, including intrinsic complexity and anisotropy of the section phase, imperfection, crack, inhomogeneities, and anisotropy. Computed tomography with X-ray and gamma rays, and electrical impedance tomography, back scattering microwave imaging. X-rays computed tomography shows promise in high resolution (5 μm) detection cracks and positions of rebar in concrete structure. EIT has the potential for locating rebars water filled fracture, and similar zones of high conductivity of Concrete with the possible of gaining information about corrosion around the reinforcement bars. Back scattering microwave imaging can be used to inspect flat surfaces and to locate rebars within 6 to 7 cm depth from the concrete surfaces. The electrical tomography is a technique in expensive and availability and works fast and easy. X-ray computed tomography needs a more elaborate and expensive measurements and operations.