Electrical resistivity is an important physical property that controls current flow in both natural and man-made materials. This property being sensitive to mineral- ogy, texture (porosity), fabric, and saturation can easily capture volume contrasts in the investigated material. This capability makes its utilization in the investiga- tion of historical walls a powerful noninvasive tool that can show more insight on possible presence of invisible internal defects as well as on providing bulk information showing the internal distribution of mortar being employed by many engineers for consolidation. The large difference in resistivity values of mortar with respect to the building materials (cemented natural and/or artificial blocks) makes the application of the resistivity method feasible in view of recent advances in hardware and software technologies. This allows for the achievement of detailed 3D resistivity volumes of the otherwise inaccessible internal structure of the historical wall. In this chapter, the geoelectrical resistivity method and the electrical properties of the mortar used in consolidation will be introduced. In addition, two case studies from Italy will be presented.
Handbook of Cultural Heritage Analysis
D'Amico S.;
2022
Abstract
Electrical resistivity is an important physical property that controls current flow in both natural and man-made materials. This property being sensitive to mineral- ogy, texture (porosity), fabric, and saturation can easily capture volume contrasts in the investigated material. This capability makes its utilization in the investiga- tion of historical walls a powerful noninvasive tool that can show more insight on possible presence of invisible internal defects as well as on providing bulk information showing the internal distribution of mortar being employed by many engineers for consolidation. The large difference in resistivity values of mortar with respect to the building materials (cemented natural and/or artificial blocks) makes the application of the resistivity method feasible in view of recent advances in hardware and software technologies. This allows for the achievement of detailed 3D resistivity volumes of the otherwise inaccessible internal structure of the historical wall. In this chapter, the geoelectrical resistivity method and the electrical properties of the mortar used in consolidation will be introduced. In addition, two case studies from Italy will be presented.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
