Rock Emissivity Measurement for Infrared Thermography Engineering Geological Applications

Infrared thermography is a growing technology in the engineering geological field both for remote survey of rock masses and as laboratory tool non-destructive characterization intact rock. In this latter case, its utility can be found either from qualitative point view, highlighting thermal contrasts on surface, or quantitative involving study surface temperature variations. Since an object proportional to emissivity, knowledge last value crucial correct calibration instrument achievement reliable outcomes. Although emissivity measured according specific procedures, there not always time possibility carry out such measurements. Therefore, referring literature values useful. frame, paper aims at providing reference belonging 15 types among sedimentary, igneous metamorphic categories, which underwent estimation by employing high-sensitivity camera. The results show that rocks defined “emitters”, with generally ranging 0.89 0.99. Such variability arises their intrinsic properties, presence pores different behavior minerals, conditions, polishing treatments ornamental stones. resulting are reported commented herein each studied lithology, thus only dataset practical use, but also laying foundation further scientific studies, aimed widening aspects investigate through IRT.