ASTM_D_2824_-_D_2824M_-_13.pdf

Designation:D2824/D2824M13Standard Specification forAluminum-Pigmented Asphalt Roof Coatings,Nonfibered,and Fibered without Asbestos1This standard is issued under the fixed designation D2824/D2824M;the number immediately following the designation indicates theyear of original adoption or,in the case of 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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This specification covers asphalt-based,aluminum-pigmented roof coatings suitable for application to roofing ormasonry surfaces by brush or spray.1.2 The values stated in either 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.1.3 The following precautionary caveat pertains only to thetest method portion,Section 8,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2C1549 Test Method for Determination of Solar ReflectanceNearAmbient Temperature Using a Portable Solar Reflec-tometerD962 Specification for Aluminum Powder and Paste Pig-ments for PaintsD4798 Practice for Accelerated Weathering Test Conditionsand Procedures for Bituminous Materials(Xenon-ArcMethod)D6511 Test Methods for Solvent Bearing Bituminous Com-pounds3.Classification3.1 Type INonfibered,containing no fiber.3.2 Type IIIFibered,containing no asbestos fiber.4.Materials and Manufacture4.1 Asphalt-based,aluminum-pigmented roof coatings shallconsist of an asphalt base,volatile petroleum solvents,and aleafing type of aluminum pigment conforming to the require-ments of Specification D962,with or without fiber added.Theyshall be mixed to a smooth,uniform consistency suitable forapplication by brush,roller,or by spraying.5.Composition5.1 Asphalt-based,aluminum-pigmented roof coatingscomplying with this specification shall conform to the follow-ing composition limits:Type IType IIIWater,max,%0.30.3Nonvolatile matter(NVM),min,%4040Insoluble in CS2,max,%of NVM4050Metallic aluminum,min,%1196.Physical Requirements6.1 UniformityAfter a thoroughly stirred sample has stoodfor 72 h at room temperature 23 6 2C 73.4 6 F in a closedcontainer,it shall show no separation of solvent or settling thatcan not be overcome by moderate stirring.6.2 ConsistencyThe roof coating shall be of a consistencythat will spread readily and permit application by brush,roller,or spray to produce a film in which the aluminum pigment leafsto form a bright reflective surface on prepared roofing,satu-rated felt,and metal surfaces at ambient temperatures above10C 50F.6.2.1 Type IConsistency at 25C 77F shall be between20 and 30 Stormer s/100 revolutions of the paddle-type rotorwith a 100-g load in addition to the standardizing load.6.2.2 Type IIIConsistency at 25C 77F shall be be-tween 15 and 90 Stormer s/100 revolutions of the propeller-type rotor with a 300-g load in addition to the standardizingload.1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.05on Solvent-Bearing Bituminous Compounds for Roofing and Waterproofing.Current edition approved Nov.1,2013.Published November 2013.Originallyapproved in 1969.Last previous edition approved in 2012 as D2824 06(2012)1.DOI:10.1520/D2824_D2824M-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.3 ReflectanceThe percent initial luminous reflectance ofcoatings,determined on samples before and after high tem-perature shelf aging,and after 1000 h accelerated weatheringtesting in accordance with Practice D4798,shall be not lessthan 50%when tested in accordance with Test Method C1549.7.Sampling7.1 See Section 4 of Test Methods D6511.8.Test Methods8.1 Determine composition and physical requirements byusing the procedures in Test Methods D6511.9.Inspection9.1 Inspection of the material shall be as agreed uponbetween the purchaser and the seller as part of the purchasecontract.10.Rejection and Resubmittal10.1 Failure to conform to any of the requirements pre-scribed in this specification may constitute grounds for rejec-tion.In the case of rejection,the seller shall have the right torein