1、Designation:C16507(Reapproved 2012)Standard Test Method forMeasuring Compressive Properties of Thermal Insulations1This standard is issued under the fixed designation C165;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of l
2、ast revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers two procedures
3、for determiningthe compressive resistance of thermal insulations.1.1.1 Procedure A covers thermal insulations having anapproximate straight-line portion of a load-deformation curve,with or without an identifiable yield point as shown in Figs.1and 2.Such behavior is typical of most rigid board orbloc
4、k-type insulations.1.1.2 Procedure B covers thermal insulations that becomeincreasingly more stiff as load is increased,as shown in Fig.3.Such behavior is typical of fibrous batt and blanket insulationsthat have been compressed previously to at least the samedeformation by compression packaging or m
5、echanical soften-ing.1.2 It is recognized that the classification of materials underProcedures A and B shall not hold in all cases.For example,some batt or blanket materials that have not been compressionpackaged will exhibit behavior more typical of ProcedureAfortheir first loadings.Also,some highe
6、r density fibrous insulationboards that have been precompressed will exhibit load-deformation curves more typical of Procedure B.There willalso be thermal insulations with load-deformation curves thatfollow none of the three types shown here;that is,curves withno straight-line portion,curves with co
7、mpaction areas,andcurves that change from negative to positive slope.1.3 This test method does not cover reflective or loose fillinsulations.1.4 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.5 This standard does not
8、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:2C16
9、7 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC168 Terminology Relating to Thermal InsulationC240 Test Methods of Testing Cellular Glass InsulationBlockE4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM
10、Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 Terminology C168 applies to the terms used in thismethod.3.2 Additional terms are defined as follows:3.3 compressive deformationthe decrease in specimenthick
11、ness by a compressive load.3.4 compressive loadthe compressive force carried by thetest specimen at any given moment.3.5 compressive modulus of elasticitythe ratio of thecompressive load per unit of original area to the correspondingdeformation per unit of original thickness below the propor-tional
12、limit of a material.3.6 compressive resistancethe compressive load per unitof original area at a specified deformation.For those materialswhere the specified deformation is regarded as indicating thestart of complete failure,the compressive resistance mayproperly be called the compressive strength.3
13、.7 proportional limit in compressionthe greatest com-pressive load that a material is capable of sustaining withoutany deviation from proportionality of load to deformation.1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subco
14、mmittee C16.32 on MechanicalProperties.Current edition approved Sept.1,2012.Published November 2012.Originallyapproved in 1941.Last previous edition approved in 2007 as C165 07.DOI:10.1520/C0165-07R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service
15、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 3.8 yield point in compressionthe load at the first poi
16、nt onthe load-deformation curve at which an increase in deformationoccurs without an increase in load.4.Significance and Use4.1 In providing Procedures A and B,it is recognized thatdifferent types of thermal insulation will exhibit significantlydifferent behavior under compressive load.Data must usuallybe obtained from a complete load-deformation curve,and theuseful working range normally corresponds to only a portion ofthe curve.The user is cautioned against use of the product inthe range beyon
