ASTM_D_2824_-_D_2824M_-_18.pdf

Designation:D2824/D2824M18Standard 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 U.S.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,health,andenvironmental practices and determine the applicability ofregulatory limitations prior to use.1.4 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: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/D4798M Practice for Accelerated Weathering TestConditions and Procedures for Bituminous Materials(Xenon-Arc Method)D6511/D6511M Test Methods for Solvent Bearing Bitumi-nous Compounds3.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.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 May 1,2018.Published May 2018.Originallyapproved in 1969.Last previous edition approved in 2013 as D2824/D2824M 13.DOI:10.1520/D2824_D2824M-18.2For 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 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 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.6.3 Solar ReflectanceThe percent initial luminous reflec-tance of coatings,determined on samples before and after hightemperature shelf aging