Calcium Chloride Concrete Moisture Test Results

After 72 hours the test dish can be collected and weighed the increase in weight is how you determine how much moisture in in the concrete. The calcium chloride test method is used to determine the moisture vapor emission rate mver from a concrete slab. The formula for calculation of test results is as follows.

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Moisture Measurement In Concrete Floor Slabs Page 3 Of 3 Construction Specifier

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Why Measure Moisture In Old Concrete Floor Slabs

Concrete slab moisture can cause problems with adhesion of floor covering materials such as tile sheet flooring or carpet and bond related material failure of non breathable floor coverings.

Calcium chloride concrete moisture test results.

These items are necessary for the calculator to function and will be used for the final result printout. During that time the calcium chloride will absorb the moisture from the slab. Mver 24 000 x gain 453 612 x area x time. Moisture from the concrete floor is absorbed by the calcium chloride when it exits the surface.

With this test a small amount of calcium chloride is weighed and then sealed on top of a properly prepared slab for 72 hours. The ph test kitmeasures the alkalinity of the concrete. Here s how it works. Please enter the location date time and weight in grams.

The building must be acclimatized to the anticipated service conditions for 48 hours prior to testing. The calcium chloride moisture test kitmeasures the quantity of moisture passing through the slab on and below grade concrete floors lbs. This online calculator has been developed exclusively for use with the amt calcium chloride cc moisture test kit. Area during a 24 hour period.

Calcium chloride moisture testing per astm 1869 04 the calcium chloride moisture test is designed to quantify the volume of water vapor emitting from a 1 000 sq. Of moisture over a 1 000 sq. The amount of moisture is expressed as the rate of mver measured in pounds of moisture of a 1000 sq. If you change the surface conditions the calcium chloride test results can vary greatly without a corresponding change in the internal moisture conditions.

In situ probes astm f2170 and calcium chloride testing astm f1869. Calcium chloride tests the surface ultimately the results expressed as mver indicate only a qualitative at best indication of the presence of free moisture at the surface of the concrete. Mver moisture vapor emission rate gain weight gain of calcium chloride crystals in grams area area of dome contact to slab less area of dish contact in square feet. Time exposure time in hours.

After 72 hours the calcium chloride is weighed again and the added weight is calculated to determine the moisture vapor driven through the subfloor. Astm international has provided several standards related to testing moisture conditions with two different test methods before installing flooring over a concrete slab. Area during a 24 hour period. Concrete slab over a 24 hour period.