The Miller Soil Cylinder can be used to satisfy either of the 2-electrode methods (ASTM G187 or AASHTO T-288 Standards).
Based on the geometry of the cylindrical system [interior diameter =16.5cm (approx) and separation between the conducting end plates = 13cm (approx)], the multiplication factor for the soil cylinder is 16.25cm.
Construction Materials:
The body of the Soil Cylinder comprises Plexiglas (allowing easy viewing of sample) and PVC components and the current distribution plates (conducting end plates) are stainless steel. Rubber O-rings provide sealing for the two end caps.
Features and Benefits:
• Large sample volume [approximately 2,714 cm3 (2.714 liters)]
• Can accommodate crushed-rock samples as well as regular soils and liquids
• Water can be added in-situ for sample saturation (de-ionized water, simulated rain water etc.)
• Closed, air-tight volume - Field collected samples can be immediately “installed” in the cylinder, as opposed to filling a separate container for transportation, in which case the samples are stored under air-tight, sealed conditions. This means that resistance readings taken at a later stage will be representative of the “as-found” condition of the sample.
• Cylinder can act as a “mold” for crushed rock sample creation
Soil Cylinder Example: M. C. Miller Factory Tap Water
Measured Resistance =118 Ω
Resistivity Value =118 Ω x 16.25 cm
=1,917.5 Ωcm
[Hence, MCM Water Conductivity = 521µS/cm]
