D4263 83 2018 standard test method for indicating moisture in concrete by the plastic sheet method plastic sheet method.
Plastic sheet method.
The test method involves taping an 18 inch 460mm square of polyethylene film onto a concrete slab and waiting at least 16 hours.
Cutting thin sheets of plastic secure the sheet to a large work surface with a clamp.
Mark your desired cut line using a straight edge then score the sheet of plastic with the utility knife making several.
Have you used the plastic sheet test method for measuring moisture in concrete.