1、Designation:D651000(Reapproved 2006)Standard Guide forSelection of Asphalt Used in Built-Up Roofing Systems1This standard is issued under the fixed designation D6510;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.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 The purpose of this guide is to provide advice for theselection of asphalt used in the construction of built-up roofing(BUR).This
3、guide does not address the use of asphalt inwaterproofing,cold-applied,or modified bituminous roofing.1.2 Reinforcements considered for use with roofing asphaltinclude ply sheets,(see Specifications D226,D2178,andD5726),base sheets(see Specifications D2626,D4601,andD4897),and cap sheets(see Specific
4、ation D3909).Theyconsist of glass,organic,or synthetic fibers.1.3 The use of asphalt in the placement of vapor retardersand rigid roof insulation also is addressed.2.Referenced Documents2.1 ASTM Standards:2D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD226 Specification for As
5、phalt-Saturated Organic Felt Usedin Roofing and WaterproofingD312 Specification for Asphalt Used in RoofingD1079 Terminology Relating to Roofing and WaterproofingD1863 Specification for Mineral Aggregate Used onBuilt-Up RoofsD2178 Specification for Asphalt Glass Felt Used in Roofingand Waterproofing
6、D2626 Specification for Asphalt-Saturated and Coated Or-ganic Felt Base Sheet Used in RoofingD3791 Practice for Evaluating the Effects of Heat on As-phaltsD3909 Specification for Asphalt Roll Roofing(Glass Felt)Surfaced With Mineral GranulesD4601 Specification for Asphalt-Coated Glass Fiber BaseShee
7、t Used in RoofingD4897 Specification forAsphalt-Coated Glass-Fiber VentingBase Sheet Used in RoofingD5726 Specification for Thermoplastic Fabrics Used in Hot-Applied Roofing and Waterproofing3.Terminology3.1 Definitions For definitions of terms used in this guide,see Terminology D1079.3.2 For a disc
8、ussion of EVT,refer to NRCA Bulletin 2-91(or the current edition of the NRCARoofing and WaterproofingManual).34.Significance and Use4.1 This guide supersedes the slope guidelines of AppendixX1 of Specification D312.4.2 Hot-applied roofing asphalt serves both as the water-proofing agent and adhesive
9、for construction of built-uproofing membranes.There are many variables that may affectthe performance of BUR membranes.This guide providesgeneral specification guidelines for the asphalt only.5.General Considerations5.1 DurabilitySpecification D312 describes four types ofasphalt.In general,the softe
10、st(least oxidized)asphalt isconsidered most durable.The accepted rule is to select thesoftest bitumen commensurate with the slope,consistent withthe other variables.5.2 When the EVT guidelines are followed the asphaltapplication rate can be expected to fall within the ranges of 1.0to 2.0 kg/m2(20 to
11、 40 lb/100 ft2).5.3 Table 1 provides general recommendations for the useof the various types of Specification D312 asphalt.5.3.1 In hotter climates,harder(higher viscosity)bitumensare chosen to minimize slippage potential.Table 2 providessome general guidance for proper asphalt selection wheneversol
12、ar exposure is considered.5.4 Recommended slope guidelines for the respectiveSpecification D312 asphalts are as follows:1This guide is under the jurisdiction of ASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.20 on RoofingMembrane Systems.Current e
13、dition approved Dec.1,2006.Published December 2006.Originallyapproved in 2000.Last previous edition approved in 2000 as D6510 00.DOI:10.1520/D6510-00R06.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStanda
14、rds volume information,refer to the standards Document Summary page onthe ASTM website.3NRCA Roofing and Waterproofing Manual,Current Edition,Use of EVT(orNRCABulletin 291),available from the National Roofing ContractorsAssociation,Rosemont,IL.Copyright ASTM International,100 Barr Harbor Drive,PO Bo
15、x C700,West Conshohocken,PA 19428-2959.United StatesNOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest information15.4.1 Type I asphalts are relatively susceptible to flow.Theygenerally are used in aggrega
16、te-surfaced roofs on inclines up to2%(14in./ft)slope.5.4.2 Type II asphalts are moderately susceptible to flow atroof temperatures.They are sometimes used in built-up roofconstruction on inclines from approximately 2%(14in./ft)slope to 8.3%(1 in./ft)slope.5.4.3 Type III asphalts are relatively nonsusceptible to flow.They are used in built-up roof construction on inclines fromapproximately 2%(14in./ft)slope to 25%(3 in./ft)slope.They are also used in vertical flashings when the flashings aretop-n
