Standard · Concrete
ASTM F1869
Moisture vapor emission rate of a concrete slab with anhydrous calcium chloride.
ASTM F1869 measures how much moisture vapor leaves a bare concrete floor. A weighed dish of anhydrous calcium chloride sits under a sealed plastic dome on the concrete; the gain in weight gives the moisture vapor emission rate (MVER).
The procedure
- Prepare a bare concrete area of 20 × 20 in. at each test site.
- Keep the space at service conditions before and during the test.
- Leave the dish sealed for 60 to 72 hours, then weigh it again.
- Report the result as pounds of water per 1,000 ft² in 24 hours.
The traps
The dish stays on for 60 to 72 hours; the result is only expressed per 24 hours. F1869 is a test method with no pass mark of its own: the limit comes from the coating or flooring maker or the specification. The test does not suit lightweight-aggregate or gypsum concrete, or concrete under a coating.
4 practice items in the members area mention ASTM F1869 (CIP 2: 3 · FROSIO written: 1).
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This page describes the subject of ASTM F1869 in our own words; it does not reproduce the standard. For the full text, buy the current edition from ASTM International. Checked on 2026-10-14; errors go in the corrections log. CoatMentor is an independent study aid. It is not affiliated with ISO, AMPP, SSPC, NACE International, ASTM or FROSIO.