In this research, geotechnical and spectral characteristics of expansive soils are described. The main aim was to investigate interrelationships between these two aspects of expansive soils across the visible-near infrared (VNIR), short wave infrared (SWIR), and mid infrared (MIR) wavelength regions (0.35-14 µm). Expansive soil geotechnical and spectral characteristics are determined by the mineralogical assemblage, principally the presence and abundance of active clay minerals, which provides a prospect to link the two. Emphasis was put on establishing new techniques for characterization including identification, estimation of commonly used geotechnical parameters, and mapping spatial variability in geotechnical characteristics of expansive soils.
