ASTM_C_1104_-_C_1104M_-_13a.pdf

Designation:C1104/C1104M13aStandard Test Method forDetermining the Water Vapor Sorption of Unfaced MineralFiber Insulation1This standard is issued under the fixed designation C1104/C1104M;the number immediately following the designation indicates the yearof 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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the amountof water vapor sorbed by mineral fiber insulation exposed to ahigh-humidity atmosphere.This test method is applicable onlyto fibrous base material and binder.The results obtained by thistest method cannot be used in describing faced products,sincethe facing is not tested by using this test method.1.2 The water vapor sorption characteristics of materialsmay be affected by conditions such as elevated temperatures orchemical exposures.Values obtained as a result of this testmethod may not adequately describe the water vapor sorptioncharacteristics of materials subjected to these conditions.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility 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 Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC302 Test Method for Density and Dimensions of Pre-formed Pipe-Covering-Type Thermal InsulationC303 Test Method for Dimensions and Density of Pre-formed Block and BoardType Thermal InsulationC390 Practice for Sampling and Acceptance of ThermalInsulation LotsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 The term sorption has been adopted for this testmethod,since mineral fiber insulation may absorb water withinits bulk when viewed macroscopically,while it adsorbs wateronto individual fibers on a microscopic scale.(1)sorptionrefers to the taking up and holding of matterby other matter by various processes such as absorption andadsorption.(2)absorptionrefers to the taking up of matter in-bulk byother matter;for example,the penetration of substances intothe bulk of another solid or liquid.(3)adsorptionrefers to surface retention or adhesion ofan extremely thin layer of molecules to the surfaces of solids orliquids with which they are in contact.4.Summary of Test Method4.1 The insulation is dried to a constant weight and exposedto a high-humidity atmosphere for 96 h.The amount of watersorbed from the vapor phase is the difference in specimenweights,and is expressed in either weight or volume percent.5.Significance and Use5.1 The sorption of water can result in an increase in weightand a resultant potential degradation of the properties of theinsulation.6.Apparatus6.1 Air-circulating oven,capable of maintaining a tempera-ture between 102 and 121C 215 and 250F.6.2 Desiccator,with calcium chloride as a desiccant.6.3 Scale,accurate to 60.1%of specimen weight.6.4 Environmental test chamber,capable of maintaining atemperature of 49 6 2C 120 6 3F and a relative humidityof 95 6 3%.1This test method is under the jurisdiction of Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Nov.1,2013.Published December 2013.Originallyapproved in 1988.Last previous edition approved in 2013 as C1104/C1104M 13.DOI:10.1520/C1104_C1104M-13A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.5 Steel rule,graduated in 1 mm or 0.05 in.intervals withdepth gauge as described in Test Methods C167.6.6 Sealable polyethylene sample bags of a size largeenough to accommodate the test specimens(for blanket,board,or pipe thermal insulations).6.7 Non-water-sorbing,non-corrosive tray with tight-fittinglid measuring at least 15 by 15 cm 6 by 6 in.(for loose-fillinsulations).7.Sampling and Test Specimens7.1 Three specimens shall be tested,unless otherwise statedin the appropriate material specification.These are to beobtained from one representative package