Concrete Moisture Test Using Plastic Sheet Method

Tape along all four edges of the square with duct tape or other waterproof tape.

Concrete moisture test using plastic sheet method.

After 72 hours a humidity reading is taken under the plastic with a dew point hygrometer. It is important to understand why this testing method is unreliable for determining concrete slab moisture problems. 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.

Concrete moisture and vapor test methods 1. This video discusses and demonstrates the plastic sheet method for measuring moisture in concrete. 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. So it is suitable for the case where the application of coatings for concrete surface is planned.

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 test shall be conducted prior to the use of coating. Drop us a line in the comments below or give us a call at. Spread out each plastic square flat over a dry area of concrete.

1 1 this test method is used to indicate the presence of capillary moisture in concrete. 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. This means no numbers or data just simple observation or eyeballing of the test location and testing materials for signs of excessive moisture. Firmly press the tape to create a moisture tight seal with the plastic and concrete.

The values given in parentheses are mathematical conversions to si units that are provided for information only and are not considered standard.