Abstract
The purpose of this study was to establish the influences of physico-chemical properties of soil particles on the hydraulic conductivity of partially saturated decomposed granite soil. The influences of water content during permeation and specific surface area of soil particles on the hydraulic conductivity were examined in detail. Water content determinations were made by a gamma ray radiation method, and specific surface area was calculated from the pore size integral curve obtained using a mercury pressure porosimeter.It was concluded that specific surface area can be correlated with specific gravity, apparent specific gravity, and the 50% size of the graduation curve. The water content measured during permeability tests can be estimated immediately by count ratio of gamma ray radiation. Hydraulic conductivity can be related to volumetric water content and specific surface area, both of which have a close relation to the physical properties of soil particles.
