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Perméamètre de terrain pour asphalte

The NCAT Field Permeameter is a falling-head permeameter using Darcy’s Law to determine rate of water flow through asphalt pavement. This design was selected by the National Center for Asphalt Technology (NCAT) for its close correlation with laboratory test results. Studies show that some Superpave mixes can be permeable to water even when […]

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The NCAT Field Permeameter is a falling-head
permeameter using Darcy’s Law to determine
rate of water flow through asphalt pavement. This
design was selected by the National Center for
Asphalt Technology (NCAT) for its close correlation
with laboratory test results. Studies show that
some Superpave mixes can be permeable to water
even when compacted to an acceptable air void
ratio. Field testing permits on the spot, accurate
estimation of permeability, eliminating the need
for coring, patching and laboratory testing. Corrections
to mix and placement procedures can be
implemented right away. Testing and subsequent
calculations can usually be completed in 10—15
minutes by one technician. The simple procedure
means no extensive training is required.


The APA-11B Permeameter is a 4-tiered, graduated
standpipe supplied in two sections and constructed
of rugged plastic. A sealing material is placed on the
base plate. The unit is then positioned on the test site
and seated against the pavement using gentle foot
pressure and included base weights. After filling with
water, outflow is observed against the clearly marked
graduations and timed. The smallest, uppermost tier
allows rapid determinations in low-porosity pavements.
The larger diameter tiers permit enough time
to accurately read flow on more porous pavements.
Alternate top section APA-18 replaces the two top tiers
with one larger diameter tier. This allows for extended
test times on moderately permeable mats or for rapid
filling when testing highly permeable mixes.


The AP-1B Kit includes the 4-tiered graduated
Permeameter, Alternate top section, Filling Tube,
a package of Moldable Sealant material, Whisk
Broom for test site preparation, and four 5lb (2.3kg)
Base Weights. Kit is packaged in a convenient
carrying case. Est. Ship Wt.: 25lb (11kg).