Compaction of soil is essential in the construction of highways, airports, buildings and bridges. Typically compaction is controlled by measuring the dry density and the water content of the compacted soil. There is a trend towards measuring the soil modulus instead or in addition to density. The reasons are that the density measurements are made using nuclear density meter, an undesirable tool in today's political environment and that pavement design uses moduli as an input parameter. Although there are many apparatus available to measure soil modulus in the field such as Falling Weight...