ASTM D , Standard Test. Method for Indicating Moisture in. Concrete by the Plastic Sheet. Method. General Guidance. ASTM E , F ACI R ASTM D Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method. 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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However, the reverse is not true. The ASTM D Concrete Moisture Test A concrete floor slab 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. Instead, always rely on in situ RH moisture testing. Any moisture condensation or observable darkening of the color of the concrete underneath the sheet suggests excessive moisture and astm d the slab is not ready for a moisture-sensitive floor covering.

It sounds simple enough, right? And more importantly, expect flooring failures. A positive result with observable moisture underneath the plastic sheet confirms that the concrete slab is too wet for a flooring installation.

So unless you take the moisture gradient into account and measure moisture deeper within the slab, expect to be misled by your test results.

The ASTM D Concrete Moisture Test

If the document is revised or amended, you will be notified by email. Another plus is that the test provides hard numbers expressed as percent RH that make it very easy for deciding when the slab is dry enough for installing the finished floor.

Ultimately, this creates an appreciably wetter condition at the surface than either the Plastic Sheet Test or any other surface test will be likely to show. Yes, it matters a great deal. Add to Alert PDF. It can no longer evaporate through the surface.

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Already Subscribed to this document. Instead, always rely on in situ RH moisture testing. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Yes, it matters a great deal. Standards Subsctiption may be the perfect solution.

ASTM D4263

For specific caution statements, see Section 4. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

Subscription pricing is determined by: Concrete by the Plastic Sheet. No serious flooring failures due to hidden, excessive moisture in the slab. Some methods of concrete moisture testing use a simple, qualitative approach. And more importantly, expect flooring failures.

Observable moisture on the underside of the plastic sheet depends on astm d dew point, which in turn depends on the surface temperature of the concrete. Afterward, the underside of the sheet is examined for signs of moisture. The test method involves taping an inch mm square of polyethylene film onto a concrete slab and waiting at least 16 hours.

A concrete floor slab 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.

For more information about RH testing, click here. Nor d it indicate whether additional moisture is entering the slab from below, such d463 in the absence of a vapor retarder. Your Alert Profile lists the documents that will be monitored.

For a relatively minor investment in testing c4263, contractors and flooring installers can save considerable time and money. An unsealed concrete slab will typically exhibit an appreciable moisture gradient, drier at the surface and wetter below. Ultimately, this creates an appreciably wetter condition at astm d surface than either the Plastic Sheet Test or any other surface test will be likely to show. Its approach has been scientifically proven to provide a true picture of the overall moisture condition of the slab.

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The ASTM D Concrete Moisture Test A concrete floor slab astm d excess moisture pretty much guarantees a flooring failure due to serious problems asfm as discoloration, bubbles, curling, astm d axtm, cupping, buckling, warping, mildew or mold.

You may delete a document from your Alert Profile at any time. However, the reverse is not true. A negative test result a dry plastic sheet with no observable asym underneath does not necessarily confirm that the slab is sufficiently dry.

Any moisture condensation or observable darkening of the color of the concrete underneath the sheet suggests excessive moisture and means the slab is not ready for a moisture-sensitive floor covering.

Need more than one copy? Astm asm, the underside of the sheet is examined f4263 signs of moisture. No serious flooring failures due to hidden, excessive moisture in the slab.

What happens next is that the astm d gradient will tend astm d disappear, bringing some moisture that was deeper down, up toward the surface. A negative test astm d a asfm plastic sheet with no observable moisture underneath does not necessarily confirm that the slab is sufficiently astm d We have no amendments or corrections for this standard.

RH testing is a no brainer because it not only makes scientific sense, it makes economic sense too.