ABSTRACT
The presence of water in the intergranular voids of partially saturated soils generates a capillary pressure between the grains. This pressure becomes zero for completely dry or saturated conditions. A model for capillary pressure in unsaturated granular soils within the pendular saturation regime has been presented. The model assumes spherical granular surfaces, zero contact angle, grain size <2.7 mm and dominant capillarity (Bond number, Bo < 1). The model has been developed for packing of spheres with e = 0.35 and e = 0.91. The model and experimental results found in the literature have been compared.
