This paper presents the results of experimental study on fine-grained soils in the municipality of Itaguí, associated with Doña Maria alluvial deposit (Antioquia-Colombia). The matric suction was determined by filter paper method and the axis-translation technique, using soil samples, compacted to different moisture contents. Further, volume measurements were taken during wetting process of the samples. The soil-water characteristic curve (SWCC) and the relationship between suction and moisture content, degree of saturation, and volume change of the soil, shows that, the biggest changes in void ratio of the soils, starts a degree of saturation close to 50%. For saturations below 50%, in wetting process, the void ratio remains stable and moisture-suction behavior, is similar for all three samples.