Soil mechanics involves a combination of engineering mechanics and the properties of soils. This description is broad and can encompass a wide range of soil types. These soils could either be saturated with water or have other fluids in the voids (., air). The development of classical soil mechanics has led to an emphasis on particular types of soils. The common soil types are saturated sands, silts and clays, and dry sands. These materials have been the emphasis in soil mechanics textbooks. More and more, it is realized that attention must be given to a broader spectrum of materials. This can be illustrated by the increasing number of research conferences directed.