5 Quality Control Applications
The Resipod model with 38 mm spacing conforms to the AASHTO T 358 Surface Re-
sistivity Test Method which uses surface resistivity as an indication of the perme-
ability of concrete. Details of the test can be found on the official AASHTO website:
http://tig.transportation.org/Pages/SurfaceResistivityTest.aspx
The Resipod family is completed by two further instruments differentiated by application as can
be seen in the table:
Application
Resipod
Resipod
Geometric
Resipod Bulk
Resistivity
Surface resistivity test on standard cylinders (4” x 8”, 100 x
200mm) or (6” x 12”, 150 x 300mm) with a maximum aggre-
gate size (1.5”, 38mm). Fixed probe spacing (1.5”, 38mm)
Bulk resistivity test on cylinders up to 100mm (4”) diameter
Surface resistivity test on non-standard cylinders with ag-
gregate sizes that may exceed > 1.5”, 38mm
Correction factor for probe spacing
Correction factor for sample geometry
User definable correction factor
Variable probe spacing
Surface resistivity mapping on site for: estimation of likeli-
hood of corrosion, corrosion rate and implementation of
cathodic protection systems
5.1 Resipod Bulk Resistivity
The accessory comprises of a stand that allows the instrument to be conveniently mounted, cables
that are easily inserted into the rear connectors and the measurement plates with conductive foam
inserts suitable for 4”x8” cylinders.
The stand accommodates both Resipod versions (38 mm and 50 mm).
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