Troxler Nuclear Moisture-Density Gauge Capacity
Troxler Nuclear Moisture-Density Gauge Capacity
(OP)
I am having trouble finding the surface area a troxler gauge can provide a good reading for. I had read somewhere that it was 10,000 square feet but I thought that sounded high. Does anyone know if this is true or not?





RE: Troxler Nuclear Moisture-Density Gauge Capacity
If you are looking for how much surface area a single density test represents, it can be anywhere from a few hundred to several thousand, depending on what your specifications require. As an example, it is common to do one test for each 500 square yards of pavement, per layer. This works out to be one test for each 4500 square feet of surface area, per layer.
RE: Troxler Nuclear Moisture-Density Gauge Capacity
I am still pretty new to the quality control field. Are there any good rules of thumb to use if specifications are not readily available?
RE: Troxler Nuclear Moisture-Density Gauge Capacity
Yes, there are rules of thumb for a variety of testing issues...
Concrete - 1 sample set for each 150 cy
Density - 1 in each footing or 1 per 2000 sf of surface per lift, but in no case less than 3 tests in any area
For any other issues, test at a rate of 10% of the issue.
RE: Troxler Nuclear Moisture-Density Gauge Capacity
Only disagreements are you should always have the full footprint under the gauge.
His second post is good rules of thumb, but I would add that the required frequency should be checked first in the project specs, then your companies rules of thumb, then what Ron has provided here.
RE: Troxler Nuclear Moisture-Density Gauge Capacity
The gauge is like a geotech boring; you now know only the properties of / under the area of what you just tested. Even at that, the gauge's measured density will still have some variation from a core sample run in the lab.
RE: Troxler Nuclear Moisture-Density Gauge Capacity
10,000 sf is very typical for a typical QC program. That said, if widely variable, the owner's interest would be better represented by more-frequent testing (providing you have an appropriate Proctor value to use - that's often where the body's buried).
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