Designation:F 1869–04
Standard Test Method for
Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride 1
This standard is issued under the fixed designation F 1869;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon (e )indicates an editorial change since the last revision or reapproval.
1.Scope
1.1This test method covers the quantitative determination of the rate of moisture vapor emitted from below-grade,on-grade,and above-grade (suspended)concrete floors.
1.2This quantity of moisture shall be expressed as the rate of moisture vapor emission,measured in pounds of moisture over a 1000ft 2area during a 24-h period.
1.3The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information only.
1.4This standard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of this standard to establish appro-priate safety and health practices,and determine the applica-bility of regulatory limitations prior to use.
2.Referenced Documents 2.1ASTM Standards:2
C 670Practice for Preparing Precision and Bias Statements for Test Methods for Constsruction Materials
F 141Terminology Relating to Resilient Floor Coverings 2.2Resilient Floor Covering Institute Standard:Recommended Work Practices 32.3Military Standard:
Mil Spec B-131H Type 1,Class III 43.Terminology
3.1Definitions:See Terminology F 141for definitions of the terms,above-grade (suspended),below-grade,concrete,on-grade,and resilient flooring.
3.2Definitions of Terms Specific to This Standard:
3.2.1moisture vapor emission rate (MVER)—amount of water vapor in pounds emitted from a 1000ft 2area of concrete flooring during a 24-h period (multiply by 56.51to convert to µg/s m 2).
4.Significance and Use
4.1Use this test method to obtain a quantitative value indicating the rate of moisture vapor emission from a concrete floor and whether or not that floor is acceptable to receive resilient floor covering.The moisture vapor emission rate only reflects the condition of the concrete floor at the time of the test.All concrete subfloors emit some amount of moisture in vapor form.Concrete moisture emission is a natural process driven by environmental conditions.All floor coverings are susceptible to failure from excessive moisture vapor emissions.The moisture vapor emitted from a concrete slab is measured in pounds.This measurement is the equivalent weight of water evaporating from 1000ft 2of concrete surf
ace in a 24–h period.The calcium chloride moisture test has been the industry standard for making this determination and is a practical,well-established and accepted test of dynamic moisture.It will produce quantified results directly applicable to flooring manu-facturer’s specifications.The results obtained reflect only the condition of the concrete floor at that time.
5.Apparatus
5.1Test Unit Contents :
5.1.1Cylindrical Plastic Dish Containing Anhydrous Cal-cium Chloride ,heat sealed in a heat sealable bag meeting Mil Spec B-131H Type 1,Class III,to protect from moisture intrusion.
5.1.1.1Anhydrous calcium chloride shall be in the form of prilled beads and shall have a minimum purity of 94%.Net weight of the anydrous calcium chloride shall be 1661g.5.1.1.2Dish shall be made of a material that does not absorb moisture.Dimensions of the dish shall be 6961mm outside diameter,1661mm height,wall thickness less than 1mm.Dish shall be supplied with a tight-fitting cover.The cover shall be secured to the dish with pressure-sensitive-adhesive backed vinyl tape.
1
This test method is under the jurisdiction of ASTM Committee F06on Resilient Floor Coverings and is the direct responsibility of Subcommittee F06.40on Practices.
Current edition approved June 1,2004.Published July 2004.Originally approved in 1998.Last previous edition approved in 2003as F 1869–03.2
For referenced ASTM standards,visit the ASTM website,,or contact ASTM Customer Service at For Annual Book of ASTM Standards volume information,refer to the standard’s Document Summary page on the ASTM website.3
Available from Resilient Floor Covering Institute,966Hungerford Drive,Suite 12-B,Rockville,MD 20850.4
Available from Standardization Documents Order Desk,Bldg.4Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.
1
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5.1.2Pressure Sensitive Label,to be used to identify the container of calcium chloride and to record the date,time,and container weight when the test is started and completed.
5.1.3Transparent Cover,with0.5in.(12mm)flanges around the perimeter,approximately0.5ft2(460646cm2),as measured between the inside of theflanges,is required to seal the test area of thefloor.The plastic cover shall have a depth greater than the height of the container of anhydrous calcium chloride.The height of the container shall be11⁄2in.60.125 (3863.2mm).
5.1.4Strip of Sealant,to secure the plastic cover to thefloor in an airtight fashion.
5.1.5Brightly Colored Warning Label,to be placed on the plastic cover as a protective warning while the test is being conducted.
5.1.6Mailing Bag,for the return of the sample to the party responsible for calculating the test results.
5.2Gram Scale,capable of measuring0.1g.This scale will be used to weigh the calcium chloride container at the start and end of the test.On-site measurement is preferred to mailing the container back to the supplier for results.
5.3Thermometer,capable of measuring room temperature.
5.4Hygrometer,capable of measuring the relative humidity of the test site.
6.Conditioning
6.1The test site should be at the same temperature and humidity expected during normal use.If this is not possible, then the test conditions should be75610°F(23.965.5°C) and50610%relative humidity.Maintain these conditions48
h prior to,and during testing.
6.2Prior to placement of the anhydrous calcium chloride tests,the actual test area shall be clean and free of all foreign substances.All residual adhesives,curing compounds,sealers, paints,floor coverings,etc.shall be removed.Removal shall be accomplished using approved OSHA work practices.For removal of existing resilientfloorings or residual adhesive, strictly observe the Warning that follows and Notes1and2. (Warning—Do not sand,dry sweep,dry scrape,drill,saw, beadblast,or mechanically chip or pulverize existing resilient flooring,backing,lining felt,or asphaltic cut-back adhesives. These products may contain either asbestosfibers or crystalline silica.Avoid creating dust.Inhalation of such dust is a cancer and respiratory tract hazard.Smoking by individuals exposed to asbestosfibers greatly increases the risk of serious bodily harm.Unless positively certain that the product contains non-asbestos material,presume it contains asbestos.Regula-tions may require that the material be tested to determine asbestos content.RFCI’s recommended work practices are a defined set of instructions addressed to the task of removing all resilientfloor covering structures whether or not they contain asbestos.When RFCI’s recommended work practices are followed,resilientfloor covering structures that contain(or are presumed to contain)asbestos can be removed in a manner that will comply with the current occupational exposure to asbestos standard’s permissible exposure limits(PEL)issued by the Occupational Safety and Health Administrations(OSHA).N OTE1—Various federal,state,and local government agencies
have regulations covering the removal of asbestos-containing material.If considering the removal of resilientfloor covering or asphaltic cut-back adhesive that contains or is presumed to contain asbestos,review and comply with the applicable regulations.
N OTE2—Certain paints may contain lead.Exposure to excessive amounts of lead dust presents a health hazard.Refer to applicable federal, state,and local laws and“Lead-based Paint:Interim Guidelines for Hazard Identification and Abatement in Public and Indian Housing”5 regarding:(1)appropriate methods for identifying lead-based paint and removing of such paint,and(2)any licensing,certification,and training requirements for persons performing lead abatement work.(Use only qualified of certified lead abatement contractors to remove lead-based paint.)
7.Procedure
7.1Expose a minimum area of20by20in.(50.8by50.8 cm)to conditions specified in6.1and6.2for a minim
um period of24h prior to starting each test.Weigh the container of anhydrous calcium chloride,including the tape used to seal the container,the container lid,and the label which should be affixed to the lid.Record the weight to the nearest0.1g on the container label along with the starting time to the nearest61⁄4 h.
7.1.1If not provided by the CaCl2test kit manufacturer, obtain the actual area of the test site.Measure the length and width of the plastic cover between the inside of theflanges,and multiply to obtain the area.Measure the bottom of the dish containing the CaCl2to obtain the radius.To calculate the area of the dish,use the following equation:
A5p r2(1) where:
p=  3.14
Deduct the area of the dish from the area of the plastic covering.Record this as the actual test area.This will be used to make thefinal calculation at the end of the test.
7.2Apply the sealant to theflanges of the plastic cover in a continuous bead.If the sealant has been preinstalled by the kit manufacturer,expose by peeling off the protective covering. The purpose of the sealant is to form an airtight seal around the perimeter of the plastic cover.
7.3Carefully remove the sealing tape from the calcium chloride dish and attach it to the side of the plastic container. This tape will be used again to reseal the same container. Remove the container lid and invert it under the dish.Set the dish(and lid)onto the concrete surface.(Warning—Do not spill any of the calcium chloride from the container.If spillage occurs that test kit is to be discarded requiring test to be performed with a new test kit.
Immediately place the plastic cover over the calcium chlo-ride dish.Firmly press down on the cover’sflanges compress-ing the sealant providing an airtight seal around the cover. 7.4After test has been in place for60-72h,remove the plastic cover.It may be best to cut the top open with a razor blade so the dish can be easily retrieved.Replace the lid on the container and immediately reseal using the original sealing
5Available from U.S.Department of Housing and Urban Development,Wash-ington,DC.Use September1990or subsequent editions.
tape.Immediately reweigh the sealed container.Record the new weight,the date,and time the test was stopped.Record if performed at the test site.
N OTE3—If test container is to be return-mailed for results,immediately place in mailing bag ensuring
bag is properly sealed.Follow mailing instructions provided with kit.
7.5The formula for computing moisture vapor emission rate(MVER)is as follows:
MVER524000·D M
453.612·A·T
5
52.91·D M
A·T(2)
where:
MVER=moisture vapor emission rate,lb/1000ft2/24h, D M=change in mass(weight gain)of anhydrous CaCl2
in g,
A=contact area of theflanged cover on concrete in ft2deducting the area of the CaCl2dish,and
T=exposure time in hours.
7.6To convert test results to SI,multiply by56.51to obtain results inµg/(s m2).
7.7Use the following guidelines to determine the number of test locations to be utilized simultaneously.
7.7.1Three test locations for areas up to1000ft2(100m2).
7.7.2Add one additional test for each1000ft2(100m2)or fraction thereof.
N OTE4—When conducting moisture emission tests,the test units should not be concentrated but shall be located in various parts of thefloor area.One unit shall be placed near the center with others being placed around perimeter.Selection of test sites shall include areas of potential moisture,that is,joints and perimeter of building.8.Precision and Bias
8.1The single-operator,within-laboratory precision of
Test Method F1869was determined using at least30 commercially-available test kits that conform to F1869.The data used to develop this precision statement were obtained using the inch-pound version of this test method.Thefigures given in the second column are the standard deviations that have been found to be appropriate for the materials and conditions of test described in thefirst column.Thefigures in the third column are the limits that should not be exceeded by the difference between the results of two properly conducted tests.
Normal weight concrete MVER,lb/1000ft2/24h Standard Deviation A Acceptable Range
of Two Results A
7.9  1.0  2.8 3.30.30.8
Lightweight concrete MVER,lb/1000ft2/24h Standard Deviation A Acceptable Range
of Two Results A
10.20.9  2.5
4.10.30.8
editorializeA These numbers represent,respectively,the(1s)and(d2s)limits described in
Practice C670.
8.2No information can be presented on the bias of the
procedure in Test Method F1869for measuring moisture vapor
emission rates from concrete because no material having an
accepted reference value is available.
9.Keywords
9.1anhydrous calcium chloride;moisture vapor emission
rate;quantitative calcium chloride;resilientflooring;RMA
referee test
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