Concrete Moisture Test Using Plastic Sheet Method

So it is suitable for the case where the application of coatings for concrete surface is planned.

Concrete moisture test using plastic sheet method.

Use as many squares as needed to test all the main areas that may get flooring. 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 video discusses and demonstrates the plastic sheet method for measuring moisture in concrete. 1 1 this test method is used to indicate the presence of capillary moisture in concrete.

This means no numbers or data just simple observation or eyeballing of the test location and testing materials for signs of excessive moisture. 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. Concrete moisture and vapor test methods 1. Firmly press the tape to create a moisture tight seal with the plastic and concrete.

Tape along all four edges of the square with duct tape or other waterproof tape. Some methods of concrete moisture testing use a simple qualitative approach. It is important to understand why this testing method is unreliable for determining concrete slab moisture problems. Plastic sheet test astm d 4263 plastic sheet testing method used to indicate the presence of moisture in concrete.

1 2 the values stated in inch pound units are to be regarded as standard. After 72 hours a humidity reading is taken under the plastic with a dew point hygrometer. The values given in parentheses are mathematical conversions to si units that are provided for information only and are not considered standard. 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.