ASTM_F_970_-_17.pdf

Designation:F97017Standard Test Method forMeasuring Recovery Properties of Floor Coverings afterStatic Loading1This standard is issued under the fixed designation F970;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is intended for use in determining therecovery properties of uninstalled resilient floor covering afterlong-term indentation test,24 h under the load specified in thedetail specification.The reported value,residual indentation,isthe depth of the depression remaining 24 h after removal of thespecified load.1.2 This test method is not intended for use in evaluating thelong-term indentation resistance or recovery properties,orboth,of resilient floor coverings at loads above those listed inthe Precision and Bias statement as described in Section 10.1.2.1 Testing at loads above 250 psi is outside the scope ofthis test method.1.3 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.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.1.5 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 Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF386 Test Method for Thickness of Resilient Flooring Ma-terials Having Flat SurfacesF387 Test Method for Measuring Thickness of ResilientFloor Covering With Foam LayerF1914 Test Methods for Short-Term Indentation and Re-sidual Indentation of Resilient Floor Covering3.Significance and Use3.1 This test method is a meaningful test for determining theindentation recovery properties of uninstalled resilient floorcovering.33.2 This test method is intended solely for the purpose ofdetermining compliance,where applicable,with static loadrequirements set forth in resilient flooring product specifica-tions under the jurisdiction of ASTM Committee F06 onResilient Floor Coverings.3.3 As testing is conducted on uninstalled flooring,resultsare not an indicator of the floor coverings installed perfor-mance.34.Apparatus4.1 The following apparatus shall be used:4.2 Conditioning Room,providing the standard laboratoryatmosphere of 50 6 5%relative humidity at a temperature of73.4 6 3.6F(23 6 2.0C).4.3 Indentation Machine,as described in Section 12 andpictured in Fig.2 of Test Method F1914.4.4 Indentor Plates,each constructed of a piece of 2-in.(50.8 mm)square stainless steel,0.240 6 0.005 in.(6.1 6 0.1mm)thick,with one side turned to 1.125 in.(28.6 mm)indiameter(one square inch area)to depth of 0.150 in.(3.8 mm)(see Fig.1).4.5 Dial Micrometer,as described in Test Method F386when measuring resilient floor coverings containing a foam1This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of Subcommittee F06.30 on TestMethods-Performance.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1987.Last previous edition approved in 2015 as F97015.DOI:10.1520/F097017.2For 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.3For additional information,see Resilient Floor Covering Institute(RFCI)document,Static Limit Testing of Resilient Flooring Products,available from RFCI,115 Broad Street,Suite 201,La Grange,GA 30240,.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international 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 layer as part of the construction or as described in Test MethodF387 when measuring all other resilient floor coverings.4.6 Template of Poly(methyl Methacrylate)(PMMA),or ofother transparent material,2 by 2 in.(50.8 by 50.8 mm)withround scratch line centered on the template that is 1.125 in.(28.58 mm)in diamet