4
3. Clean the concrete surface of any foreign substances.
A foreign substance can be oor covering, adhesive residue, epoxy coating,
paint, curing and sealing compounds, waxes, dirt or oil stains, or any other
material residue on the slab surface. Remove concrete contaminants by shot
blasting, abrasive grinding wheel or diamond cup wheel. The use of wire brushes
or razor scraping may not be suitable for achieving a clean, open concrete slab
surface.
4. Prepare test area and schedule testing.
ASTM requires that a minimum of 20 x 20 inches of concrete surface area be
cleaned for each test (as described above) and allowed to remain open for at
least 24 hours before setting the calcium chloride test. Once the test is placed,
it must remain undisturbed for a period of 60 to 72 hours. Always plan carefully
in advance of testing to ensure open time after preparation and exposure time
during the testing period will allow for proper placement and retrieval.
QUANTITATIVE TEST METHOD FOR DETERMINING MOISTURE
VAPOR EMISSION RATE (ASTM F 1869)
►PURPOSE:
Alpha
®
Moisture Test Kit is designed to quantitatively measure the rate of moisture
vapor emission.
►CONTENTS:
Each test kit consists of one cylindrical container lled with anhydrous calcium
chloride and one transparent plastic dome with pre-installed sealant around the
perimeter.
►REQUIRED TOOLS: (NOT INCLUDED)
Surface grinder with vacuum mount, safety goggles, dust respirator, protective
gloves, cloth rags, utility knife, scale capable of measuring to nearest 0.1 gram
and duct tape.
►APPLICABLE STANDARDS:
A person using this test kit shall strictly follow the instructions given in the latest
ASTM F 1869 published by American Society for Testing & Materials. The copies
