ASTM D7655 D7655M-2012 2500 Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems《防水层屋面系统中作为压载物使用的集料尺寸的标准分类》.pdf
《ASTM D7655 D7655M-2012 2500 Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems《防水层屋面系统中作为压载物使用的集料尺寸的标准分类》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7655 D7655M-2012 2500 Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems《防水层屋面系统中作为压载物使用的集料尺寸的标准分类》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7655/D7655M 12Standard 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 revision, the
2、 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 standard s
3、izes 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 to
4、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 either
5、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 d
6、oes 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.2. Referenced Documents2.1 ASTM St
7、andards:C136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD75 Practice for Sampling AggregatesD1079 Terminology Relating to Roofing and WaterproofingE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 ANSI/SPRI Standard:RP-4 Wind Design Standard for Ballasted Single-ply
8、 Roof-ing Systems3. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, 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 ballastedused. ANSI/SPRI RP-4 provides a
9、 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 providedANSI/SPRI RP-4 in designing the w
10、ind 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 membrane systems.5. Manufacture5.1
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