Field Testing/Classification

Classifying a soil into its proper geotechnical group assures that its characteristics will be understood and taken into account when designing for structures and embankments. Moisture content is an important property that affects strength, stability, and compactability of soil.


Geotechnical Classification Charts aid in the visual identification of grain size. Estimates of shear strength can be performed in-situ quickly with instruments like the Pocket Penetrometer, Pocket Shear Vane, and Pocket Geotester. Cone Penetrometers allow strength and penetration resistance measurements at or below the surface. Soil densities in-place are determined with Sand Cone and Voluvessel instruments.  The Double Ring Infiltrometer establishes accurate permeability values of undisturbed soils in the field. Electrical Resistivity and pH levels of soils are important for estimates of corrosive action on pipes, cables and other buried structures, and Turbidity readings help with estimates of surface water run-off.