1、Designation:C68717Standard Practice forDetermination of Thermal Resistance of Loose-Fill BuildingInsulation1This standard is issued under the fixed designation C687;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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 practice presents a laboratory guide to determinethe thermal resistance of loose-fill building insulations at meantemperatures
3、 between 20 and 55C(4 to 131F).1.2 This practice applies to a wide variety of loose-fillthermal insulation products including fibrous glass,rock/slagwool,or cellulosic fiber materials;granular types includingvermiculite and perlite;pelletized products;and any otherinsulation material installed pneum
4、atically or poured in place.It does not apply to products that change their character afterinstallation either by chemical reaction or the application ofbinders or adhesives,nor does it consider the effects ofstructures,containments,facings,or air films.1.3 Since this practice is designed for reprod
5、ucible productcomparison,it measures the thermal resistance of an insulationmaterial which has been preconditioned to a relatively drystate.Consideration of changes of thermal performance of ahygroscopic insulation by sorption of water is beyond thescope of this practice.1.4 The sample preparation t
6、echniques outlined in thispractice do not cover the characterization of loose-fill materialsintended for enclosed applications.For those applications,aseparate sample preparation technique that simulates the in-stalled condition will be required.However,even for thoseapplications,some other aspects
7、of this practice are applicable.1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of th
8、is standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princip
9、les for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC168 Terminology Re
10、lating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC653 Guide for Determination o
11、f the Thermal Resistance ofLow-Density Blanket-Type Mineral Fiber InsulationC739 Specification for Cellulosic Fiber Loose-Fill ThermalInsulationC1045 Practice for Calculating Thermal Transmission Prop-erties Under Steady-State ConditionsC1114 Test Method for Steady-State Thermal TransmissionProperti
12、es by Means of the Thin-Heater ApparatusC1363 Test Method for Thermal Performance of BuildingMaterials and Envelope Assemblies by Means of a HotBox ApparatusC1373 Practice for Determination of Thermal Resistance ofAttic Insulation Systems Under Simulated Winter Condi-tions3.Terminology3.1 Unless oth
13、erwise stated,the terms and definitions foundin Terminology C168 are applicable herein.4.Significance and Use4.1 The thermal resistance,R,of an insulation is used todescribe its thermal performance.1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct
14、responsibility of Subcommittee C16.30 on ThermalMeasurement.Current edition approved March 15,2017.Published April 2017.Originallyapproved in 1971.Last previous edition approved in 2012 as C687 12.DOI:10.1520/C0687-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM
15、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 international standard was develope
16、d 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 4.2 The thermal resistance of an insulation is related to thedensity and thickness of the insulation.It is desirable to obtaintest data on thermal resistances at thicknesses and densitiesrelated to the end uses of the produc