ASTM D , Standard Test. Method for Indicating Moisture in. Concrete by the Plastic Sheet. Method. General Guidance. ASTM E , F ACI R ASTM Dpdf – Download as PDF File .pdf) or read online. 1 Sep This standard is issued under the fixed designation D ; the 1 This test method is under the jurisdiction of ASTM Committee D33 on.
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A negative test result a dry plastic sheet with no observable moisture underneath does not necessarily confirm that the slab is sufficiently dry. Nor does it indicate whether additional moisture is entering astm d4263 slab from below, such astm d4263 in s4263 absence of a vapor retarder.
Yes, it matters a great deal. A positive result with observable moisture underneath the plastic sheet confirms that the concrete slab is too wet for astm d4263 flooring installation.
Any moisture condensation or observable darkening of the color of the concrete underneath the sheet satm excessive moisture and means the slab is not ready for astm d4263 moisture-sensitive floor covering. Accurate Concrete Moisture Measurement? Observable moisture on the underside of astm d4263 plastic sheet depends on the dew point, which in turn depends on the surface temperature of the concrete. However, the reverse is not true.
The ASTM D Concrete Moisture Test
Afterward, the underside of the sheet is examined for signs of moisture. For more information about RH testing, click here.
No serious flooring failures astm d4263 to hidden, excessive moisture in the slab. The test method involves taping an inch mm square of polyethylene film astm d4263 a concrete slab and waiting at least 16 hours. For a relatively minor investment in testing equipment, contractors and flooring installers can save considerable time and money.
And more importantly, expect flooring failures.
So unless you take the moisture gradient into account and measure moisture deeper within the slab, expect to be misled by your test results.
It can no longer aetm through the surface. No more costly, moisture-related astm d4263. Ultimately, this creates an appreciably wetter astm d4263 at the surface than either the Plastic Sheet Test or any other surface test will be likely to show.
Instead, always rely on in situ RH moisture testing. It sounds simple enough, right?
What happens next is that the moisture gradient will tend to disappear, bringing some moisture that was deeper down, up toward astm d4263 surface. Another plus s4263 that the test provides hard numbers expressed as percent RH that make it very easy for deciding when the slab is astm d4263 enough for installing the finished floor.
A concrete floor astm d4263 with excess moisture pretty much guarantees a flooring failure due to serious problems such as discoloration, bubbles, curling, adhesive deterioration, cupping, buckling, warping, mildew or mold. RH testing is a no brainer because ast not astm d4263 makes scientific sense, it makes economic sense too.
However, it is NOT recommended.
Some methods of concrete moisture testing use a simple, qualitative approach. Its approach has been scientifically proven to provide a true picture of the overall moisture astm d4263 of the slab. The ASTM D Concrete Astj Test A concrete floor slab with excess moisture pretty much guarantees a flooring failure due to serious problems such as astm d4263, bubbles, curling, adhesive deterioration, cupping, buckling, warping, mildew or mold.
Satm astm d4263 concrete slab will typically exhibit an appreciable moisture gradient, drier at the surface and wetter below.