1、Designation:C157404(Reapproved 2018)Standard Guide forDetermining Blown Density of Pneumatically Applied Loose-Fill Mineral Fiber Thermal Insulation1This standard is issued under the fixed designation C1574;the number immediately following the designation indicates the year oforiginal adoption or,in
2、 the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide describes two alternate procedures for deter-mining blown density at a predete
3、rmined thickness or a rangeof thicknesses expected in field applications of mineral fiberloose-fill insulation.1.2 This guide involves blowing a sample of loose-fillinsulation into a test frame of known volume,measuring theweight of the insulation captured and calculating the blowndensity.1.3 This g
4、uide is intended for pneumatically-applied loose-fill mineral fiber insulation designed for use in horizontal openattic spaces.1.4 This guide is intended for product design and productauditing by manufacturers of loose-fill insulation.This guide isadaptable as a plant quality control procedure.1.5 T
5、his guide does not predict the aged density of themineral fiber loose-fill insulation.1.6 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.
6、1.7 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8
7、This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trad
8、e(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC1374 Test Method for Determination of Installed Thick-ness of Pneumatically Applied Loose-Fill Building Insu-lation3.Terminology3.1 DefinitionsTerminology C168 is applicable to theterms used in
9、this standard.3.2 Definitions of Terms Specific to This Standard:3.2.1 Variable blown densitychange in density exhibitedby loose-fill insulation as a function of thickness.3.2.1.1 DiscussionSome loose-fill insulation materials ex-hibit an increase in blown density when thickness increases.Also,the o
10、riginal thickness may or may not decrease with timeresulting in the same or somewhat higher densities.Thisthickness versus density relationship should be consideredwhen developing coverage information for the bag label.4.Significance and Use4.1 Blown density is used to develop loose-fill coveragecha
11、rts.Data for blown density vs thickness is used in thedevelopment of a variable blown density presentation forloose-fill insulation.4.2 Thermal resistance(and conductivity)of loose-fill min-eral fiber insulation depends on density and thickness.Theresulting blown density data is useful in developing
12、 an expres-sion for apparent thermal conductivity as a function of density.This will in turn aid the manufacturer in developing coverageinformation for packages of loose-fill insulation.4.3 The blown density obtained in this method is for thethickness of the test only.The relationship of blown densi
13、tywith thickness can be determined by repeating the proceduresoutlined here using different thicknesses.4.4 These procedures are not the same as the test methoddescribed in Test Method C1374.Depending on the test1This guide is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is
14、the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edition approved Sept.1,2018.Published November 2018.Originallyapproved in 2004.Last previous edition approved in 2013 as C1574 04(2013).DOI:10.1520/C1574-04R18.2For referenced ASTM standards,visit the ASTM website,www.
15、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 StatesThis internation
16、al standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 conditions utilized,the blown density may,or may not,represent the installed density values obtained by using TestMethod C1374.4.5 This guide can be used to develop appropriate blowingmachine settings