1、Designation:D7655/D7655M12(Reapproved 2017)Standard Classification forSize of Aggregate Used as Ballast for Membrane RoofSystems1This standard is issued under the fixed designation D7655/D7655M;the number immediately following the designation indicates theyear of original adoption or,in the case of
2、revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This classification defines the aggregate size designa-tions and ranges in mechanical analyses for sta
3、ndard sizes ofaggregate used as ballast for membrane roof systems.1.2 The text of this classification references notes andfootnotes which provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the standard.1.3 With regard
4、 to sieve sizes and the size of aggregate asdetermined by the use of testing sieves,the values in inch-pound units are shown for the convenience of the user;however,the standard sieve designations shown in parenthesesis the standard value as stated in Specification E11.1.4 The values stated in eithe
5、r 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.1.5 This standard doe
6、s 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.1.6 This international st
7、andard 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.Ref
8、erenced Documents2.1 ASTM Standards:2C136/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesD75/D75M Practice for Sampling AggregatesD1079 Terminology Relating to Roofing and WaterproofingE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 ANSI/SPRI Standard:3RP-4 Wind
9、 Design Standard for Ballasted Single-ply Roof-ing Systems3.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,refer to Terminology D1079.4.Significance and Use4.1 The wind resistance of ballasted membrane roof systemsis determined largely by the size and weight of the ball
10、astedused.ANSI/SPRI RP-4 provides a method for the wind designof ballasted single-ply membrane roof systems and includesspecific guidelines for the size and weight of aggregate used asballast.The aggregate size classifications provided in thisstandard are intended for use with the guidelines provide
11、dANSI/SPRI RP-4 in designing the wind resistance of aggregateballasted single-ply membrane roof systems.4.2 The aggregate size classifications provided in this clas-sification are intended to provide a basis of compliance forcontract documentsthat specify certain aggregate sizes for useon ballasted
12、membrane systems.1This classification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.20on Roofing Membrane Systems.Current edition approved Nov.1,2017.Published December 2017.Originallyapproved in 2012.Last previous ed
13、ition approved in 2012 as D7655/D7655M 12.DOI:10.1520/D7655_D7655M-12R17.2For 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 w
14、ebsite.3Available from SPRI,411 Waverley Oaks Road,Suite 331B,Waltham,MA02452.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 standardizat
15、ion 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 5.Manufacture5.1 The standard sizes of aggregate described in this clas-sification are manufacture
16、d by means of any suitable processused to separate raw material into the desired size ranges.Production of standard sizes by blending two or more differentcomponents is permitted.6.Standard Sizes6.1 Standard sizes of aggregate shall comply with the sizesgiven in Table 1.All sizes shall be determined by means oflaboratory sieves having square openings and conforming toSpecification E11.TABLE 1 Standard Sizes of Processed AggregateSizeNumberNominal Size,Square OpeningsAmounts Finer than Each Labor