A second direct test astm f 1869 standard test method for measuring moisture vapor emission rate of concrete subfloor using anhydrous calcium chloride was standardized in the 1990s by the subcommittee on practices of the committee on resilient floor coverings.
Methods for measuring moisture content in concrete.
There are three standard methods for measuring concrete moisture.
There are many applications where trace moisture measurements are necessary for manufacturing and process quality assurance.
Astm 2170 standard test method for determining relative humidity in concrete floor slabs using in situ probes takes a different approach to measuring moisture.
Astm c70 standard test method for surface moisture in fine aggregate is another test method but is only for use on fine aggregate.
Moisture and moisture content.
Methods used to measure moisture in concrete the plastic sheet method1 astm d 4263 as the most familiar method for.
Moisture analysis covers a variety of methods for measuring moisture content in both high level and trace amounts in solids liquids or gases.
Moisture in percentage amounts is monitored as a specification in commercial food production.
Under this method you ll use a thermo hygrometer with in situ probes along with a series of prepared holes to get readings of relative humidity deep in the concrete slab.
To avoid these failures from occurring a variety of test methods are used to determine the amount of moisture in concrete before installing flooring.
Often more than one method is used to get an accurate reading of actual moisture content.
From the 1940s to today many contractors have relied on surface based methods for monitoring or evaluating relative humidity levels and moisture content.
A definitive test that measures the amount of moisture released from the concrete requires a calcium chloride kit or a relative humidity meter.
Therefore it s advisable to have a floor tested for moisture content prior to installing flooring or moisture barriers.
Astm c566 standard test method for total evaporable moisture content of aggregate by drying is applicable to both fine or coarse aggregate and is the most commonly used procedure.
Three methods for testing concrete moisture levels it is vitally important to test your concrete slab s moisture before installing flooring over it.
As the name suggests this method calls for small test holes to be drilled into the concrete slab at a depth 40 of the total thickness for slabs on grade 20 from each side of.
