Operation
4812163801.pdf 2019-04-30
Operation CMV
The Compaction Meter is measuring the dynamic
stiffness of the ground. The CMV is influenced by the
rolling speed, rolling direction (forward or reverse),
amplitude setting and vibration frequency. DCM is less
sensitive to small variation in vibration frequency.
Some reference CMV for some compacted materials:
Material CMVMaterial CMV
rock fill 40 - 200rock fill 40 - 200
gravel 25 - 100gravel 25 - 100
sand 20 - 60sand 20 - 60
silt 5 - 30silt 5 - 30
clay 0 - 80clay 0 - 80
The water content in the compacted soil, not rock fill,
has a large influence on stiffness, wet soil will result in
low CMV and dry soil will result in higher CMV.
When double-jump occur CMV will be reduced and
this lower CMV should not be used for determine if
compaction is ready or not.
NOTE: The operator shall always keep an eye on
where they are driving and not focus too much on the
CMV display, due to safety.
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