The soil compaction is one of the most common activities of civil construction.  It is applicable to construction of fills, dams, roads and embankments. The compacted soils can be subjected to various external and environmental loading after construction.  The external loading can arise from superstructure loading, moving traffic and overburden soils.  The environmental loading can come from the interaction of surficial soils with the atmosphere in forms such as wetting and drying. Under the combination of these loadings, the compacted soils display complex patterns of behaviour such as swelling, collapse, tensile cracking and swelling pressure development against buried non-yielding bodies. The current approaches for predicting the behaviour of compacted soils during subsequent external and environmental loading are, on one hand, are very complex, and on the other hand, are not entirely satisfactory. The seminar will present a new framework for predicting the behaviour of compacted soils under these loadings, referred to as MPK Framework (Kodikara, 2012). More recent experimental results supporting the framework will also be presented. In addition, the conceptual approach to developing a constitutive model for computer implementation will be outlined.