ASTM F1869
Full Name
ASTM F1869 – Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride
Scope
ASTM F1869 is a standard test method used to determine the rate at which moisture vapor is emitted from a concrete subfloor. This information is crucial for assessing the suitability of the subfloor for various flooring materials, particularly those sensitive to moisture, such as hardwood flooring.
Procedure:
- Preparation: a test chamber is constructed directly on the concrete subfloor. This chamber is filled with anhydrous calcium chloride, a hygroscopic substance that absorbs moisture from the air.
- Exposure: the chamber is left undisturbed for a specified period, allowing the calcium chloride to absorb moisture emitted from the subfloor.
- Measurement: the increase in mass of the calcium chloride is measured. This increase corresponds to the amount of moisture absorbed from the subfloor.
- Calculation: the moisture vapor emission rate is calculated based on the mass increase, the area of the test chamber, and the exposure time.
The moisture vapor emission rate of a concrete subfloor is a critical factor in preventing moisture-related issues, such as:
- Cupping: the warping of wood flooring due to moisture absorption.
- Mold and mildew growth: these can lead to health problems and property damage.
- Delamination: the separation of layers in flooring materials.
ASTM F1869 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM F1869 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
moisture vapor emission rate; concrete subfloor; anhydrous calcium chloride; test method; standard; vapor permeability; moisture content; relative humidity; equilibrium moisture content; permeance; diffusion coefficient; calcium chloride; desiccant; vapor pressure