The invention is a composite of interdependent engineering methods for
earthen fill engineering and construction. The invention includes the
development, utilization, and correlation of actual, cumulative field
compaction energies, unique to and based on field combination-specific
variables of any combination but including all of the following: soil
type, compactor type, lift thickness, moisture content, and soil
amendment type and mix. Interdependent development of the field
combination-specific compaction energies includes the following
combination-specific steps: novel rolling resistance energy versus dry
density field trials, novel generation and direct curvalinear utilization
of parabolic rolling resistance energy curves with roller passes, novel
determination of asymptotic energy-density approach ranges, novel
selection and application of percentage density sectors on novel
moisture-density curves, and novel projection of said percentage density
sectors onto corresponding roller compaction energy curves for selection
and use of design compaction energy levels. Interdependent correlation of
the combination-specific energy values is made with all physical and
engineering properties of all soil types and amended soil types in the
compacted state that corresponds to and is the product of the specific
combination of field variables. In addition to interdependent utilization
of the energy and corresponding engineering properties in method
development, the energy and corresponding engineering properties are
tabulated within cross-matrices of all field combinations for use in
engineering design, laboratory compaction testing, and construction
controls. The cross-matrix values are related in a manner that permits
determining values for additional field combinations that have not been
tested on a full scale.