# ASTM F1869

Source: https://coatmentor.com/standards/astm-f1869/ · Updated 2026-10-14

Moisture vapor emission rate of a concrete slab with anhydrous calcium chloride.

**Publisher**: ASTM International

**Area**: Concrete

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).

## Related

- **Concepts:** [Drying, curing and recoat windows](https://coatmentor.com/learn/cure-and-recoat/)
- **Standards:** [ASTM F2170](https://coatmentor.com/standards/astm-f2170/) · [ASTM D4263](https://coatmentor.com/standards/astm-d4263/)

## About this page

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](https://coatmentor.com/method/). CoatMentor is an independent study aid. It is not affiliated with ISO, AMPP, SSPC, NACE International, ASTM or FROSIO.