CONSTANT HEAD PERMEABILITY (Flex Wall Perm)


LABORATORY PROCEDURES USED: ASTM D5084 - Standard Test Method for Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter

RESULTS GIVEN: Hydaulic Conductivity, k, in cm/sec and m/sec; and dry density in kg/m3.

FACT: ASTM D5084 is the standard test method to determine the hydraulic conductivity (coefficient of permeability) of fine grained soils where precise measurements are required.

NOTE: Hydraulic Conductivity is also known as "Coefficient of Permeability".

REQUIRED SAMPLE SIZE FOR TESTING:
If the permeablility of an undisturbed sample is required, use a 3 inch o.d. Shelby tube to collect the sample. Shelby tubes can be purchased from Solum or any drilling rig service provider. Solum also offers Shelby tube extractors for surface samples free of charge; shipping is extra.
Solum will remould disturbed soil samples to a density and moisture content as specified by the client. If the client has the remoulding specs (ie. standard proctor results of the soil) then 2000g of soil is sufficient. If soil has particles greater than 4.75 mm (No. 4) then 3000g is required. If there is no proctor data for the disturbed sample then the standard proctor test must be performed.