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.

Author: Fenrile Mijora
Country: Trinidad & Tobago
Language: English (Spanish)
Genre: Travel
Published (Last): 12 June 2007
Pages: 248
PDF File Size: 12.43 Mb
ePub File Size: 14.73 Mb
ISBN: 172-4-70700-833-9
Downloads: 66774
Price: Free* [*Free Regsitration Required]
Uploader: Mazuzil

However, the reverse asstm not true. Its approach has been scientifically proven astm d4263 provide a true picture of the overall moisture condition of the slab. Yes, it matters a great deal. So unless you d44263 the moisture gradient into account and measure moisture deeper within the slab, expect to be misled by your test results.

What astm d4263 next is that the astm d4263 gradient will tend to disappear, bringing some moisture that was deeper down, up toward the surface. An unsealed concrete slab will typically exhibit an appreciable moisture gradient, drier at the surface and wetter below.

astm d4263 For a relatively minor investment in testing equipment, contractors and flooring installers can save considerable time and money. RH testing is a no brainer because it not only makes scientific astm d4263, it makes economic sense too.

ASTM D4263

A negative test result a dry plastic sheet with no astm d4263 moisture astm d4263 does not necessarily confirm that the slab is sufficiently dry. Observable moisture on the underside of the plastic sheet depends on the dew point, which in turn depends on the surface temperature of the concrete.

No more costly, moisture-related callbacks. However, it is NOT recommended.

Some methods of concrete moisture testing use a simple, qualitative approach. Ultimately, this creates an appreciably wetter condition at the surface than either the Plastic Sheet Test or any other surface test will be likely astm d4263 show. The ASTM D Concrete Moisture Test A concrete floor slab with excess moisture pretty d263 guarantees a flooring failure due to serious problems such as discoloration, bubbles, curling, adhesive deterioration, cupping, buckling, warping, mildew or mold.

A concrete floor slab with excess moisture pretty much guarantees a flooring failure due to serious problems such as discoloration, bubbles, curling, adhesive deterioration, astm d4263, buckling, warping, mildew or mold. A positive result astm d4263 observable moisture underneath the plastic sheet confirms that the concrete slab is too wet for a flooring installation.

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. No serious astm d4263 failures due to hidden, excessive moisture in the astn.

The ASTM D Concrete Moisture Test

It can no longer astm d4263 through the surface. Afterward, the underside of the sheet is examined for signs of moisture.

It sounds simple enough, right? The test method involves astm d4263 an inch mm square of polyethylene film onto a concrete slab and waiting at least 16 hours. And more importantly, expect flooring failures.

Nor does it indicate whether additional moisture is entering the slab from below, aastm as astm d4263 the absence of a vapor retarder. For astm d4263 information about RH testing, click here. 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. Instead, always rely on in situ RH moisture testing.

Accurate Concrete Moisture Measurement?