Infrared thermography is a powerful tool of nondestructive evaluation, but it has some limitations when dealing with deep and low thermal resistance defects. This is the case of thick walls of historic buildings and buried anthropic remains, which are important tasks of the cultural heritage field. Thus, it is evident the need of relatively high-depth inspection techniques such as the geophysical ones. The main purpose of this study was to characterize the overlapping zone from low-to-high depth with infrared thermography and geophysical methods. The investigation was carried out on two-component structures including a plaster layer over a support of marble, brick, or tuff with plaster detachments intentionally created. Results prove that an integrated use of the two techniques allows for detailed evaluation of architectonic structures and provides information about the related causes of degradation
In this paper we describe the application of GPR and resistivity (dipole-dipole) methods to an archeological investigation. The aim of this study was to obtain information about buried pre-Roman structures below the Roman residence “Casa dell’Atrio a Mosaico,” in the ancient town of Ercolano (Naples). A number of resistivity (dipole-dipole) and GPR profiles were carried out on the mosaic floor of the house. To perform resistivity profiles in a nondestructive way on the mosaic floor, special flat-base copper electrodes were used. The electrode spacing used was [Formula: see text] and [Formula: see text]. GPR data were collected using [Formula: see text] and [Formula: see text] antennas. The radar profiles were carried out primarily along the electrical profiles in order to obtain a direct comparison between the two methods. Both resistivity and GPR methods evidenced a number of structures buried at shallow depths. Both methods located a structure identified as a conductive body with electric parameters strongly contrasting those of the surrounding material. The archaeological interpretation of such structures is in terms of remnants of walls of pre-Roman houses and of a cistern used for collecting rain, connected to a pipe.
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