ABSTRACT
The critical state in unsaturated soils can be represented by five parameters, Ma, Mb, Γab, λa and λb. For compacted soils, the stress ratios Ma and Mb and the compressibilities λa and λb can be expressed as functions relating them to degree of saturation. These functions can be normalised with respect to the saturated state. The same normalised functions fit experimental data for a lateritic gravel from Kenya and a residual sandy clay from Singapore suggesting that the form of these functions may be common to a range of soil types.
