ASTM_D_7051_-_05_2013.pdf

Designation:D705105(Reapproved 2013)Standard Test Method forCyclic Thermal Shock of SBS-Modified Bituminous RoofingSheets with Factory-Applied Metal Surface1This standard is issued under the fixed designation D7051;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.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 This test method covers the measurement of movementdue to cyclic thermal exposure of SBS(styrene-butadiene-styrene)-modified bituminous sheets with a factory-appliedmetal foil surface.1.2 The values stated in SI units are to be regarded asstandard.The values in parentheses are for information only.1.3 This standard does 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 Standards:2C552 Specification for Cellular Glass Thermal InsulationD41 Specification for Asphalt Primer Used in Roofing,Dampproofing,and WaterproofingD312 Specification for Asphalt Used in RoofingD5147 Test Methods for Sampling and Testing ModifiedBituminous Sheet Material3.Summary of Test Method3.1 This test consists of exposing two specimens of 2000 65 by 90 6 5 mm(78.7 6 0.2 by 3.5 6 0.2 in.)to cycles oftemperature produced by infrared radiation.The variation inthe specimen length dimension is measured in relation to thenumber of cycles and temperature variation.This test applies tometal foil surfaced SBS-modified bitumen roofing sheets.4.Significance and Use4.1 This test method is used to determine the dimensionalchanges and physical stability of the product upon exposure tospecified cyclic thermal conditions.It is also useful in deter-mining the integrity of the bond between the metal foil and theSBS-modified bituminous compound.5.Apparatus5.1 The apparatus and test assembly as shown in Figs.1-4consists of the following components.5.2 A hollow metal,rigid support or base on which the testsample is mounted,hereafter referred to as the shock table.Thebase shall be 2110 6 25 mm long by 280 6 25 mm wide by125 6 13 mm tall(83 6 1.0 in.long by 11 6 1.0 in.wide by5 6 0.5 in.tall).The shock table shall have water inlet andoutlet attachments mounted such that the support is always fullof circulating water.This is done to avoid expansion orcontraction of the shock table during the test.NOTE1The support can be easily constructed by welding two piecesof wide channel iron together with the addition of end plates.5.3 Mounting brackets for the measuring devices shall beattached to the shock table such that the measuring device islevel with and facing the metal reference tabs attached to thefoil surface of the specimens(see 6.4).5.4 Linear transducers,or dial indicators,accurate to 10 m(0.4 mil)shall be used to measure the change in distancebetween the adhered metal reference tab and the mountedindicator.5.5 Six or more 250 W infrared heating lamps are mountedabove the support equally spaced across the 2000 mm(79 in.)test length.NOTE2The number of lamps is not critical as long as the temperatureis accurate and consistent.5.6 Sheet metal panels,or other suitable protection,shall bemounted on the sides and ends of the hollow support to reducedrafts and temperature fluctuations during the test.The panelsshould be easily removed to allow for daily observations of thetest assembly.5.7 Aregulating system shall be used to maintain the timingof the heating and cooling cycles.Temperature may bemaintained automatically or manually,but the temperatureshall be measured using thermocouples.1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.04 on Felts,Fabrics and Bituminous Sheet Materials.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 2005.Last previous edition approved in 2005 as D7051 05.DOI:10.1520/D7051-05R13.2For 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.Preparation of Apparatus6.1 The top surface of the shock table shall be primed withSpecification D41 asphalt primer and allowed to dry.Specifi-cation C552 Type IV,board cellular glass thermal insulation 38mm(1.5 in.)thick shall be cut to fit the shock table.Thecellular glass insulation shall then be bonded to the primedmetal base with Specification D312 Type IV asphalt.6.2 Place the thermocouples on the insulation surface and,with side shields in pos