Concrete Moisture Test Using Plastic Sheet Method

The sheet is left in place for 72 hours then a dewpoint hygrometer is used to test the level of moisture that is in the air under the sheet. Spread out each plastic square flat over a dry area of concrete. This means no numbers or data just simple observation or eyeballing of the test location and testing materials for signs of excessive moisture.

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The Astm D4263 Concrete Moisture Test

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Concrete moisture test using plastic sheet method.

Plastic sheet test astm d 4263 plastic sheet testing method used to indicate the presence of moisture in concrete. Tape along all four edges of the square with duct tape or other waterproof tape. 1 2 the values stated in inch pound units are to be regarded as standard. Some methods of concrete moisture testing use a simple qualitative approach.

1 1 this test method is used to indicate the presence of capillary moisture in concrete. Firmly press the tape to create a moisture tight seal with the plastic and concrete. This video discusses and demonstrates the plastic sheet method for measuring moisture in concrete. Concrete moisture and vapor test methods 1.

The plastic sheet method was developed by astm international and involves taping a plastic sheet to the surface of the concrete to create a vapor proof seal around the plastic. Use as many squares as needed to test all the main areas that may get flooring. One such test is the plastic sheet test astm d4263. To use this method astm d 4263 standard test method for indicating moisture in concrete by the plastic sheet method a plastic sheet is tightly taped to the concrete.

The values given in parentheses are mathematical conversions to si units that are provided for information only and are not considered standard. After 72 hours a humidity reading is taken under the plastic with a dew point hygrometer. The test shall be conducted prior to the use of coating. So it is suitable for the case where the application of coatings for concrete surface is planned.

It is important to understand why this testing method is unreliable for determining concrete slab moisture problems.

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