ASTM D7051-2005(2013) 1875 Standard Test Method for Cyclic Thermal Shock of SBS-Modified Bituminous Roofing Sheets with Factory-Applied Metal Surface《带厂用金属表面的SBS改良沥青屋顶板材的循环热冲击的标准试验.pdf

1、Designation: D7051 05 (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 ad

2、option 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 therm

3、al 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 concer

4、ns, 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 The

5、rmal 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 2

6、000 65by906 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

7、. 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

8、.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

9、 (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.NOTE 1The support can be easil

10、y 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 spec

11、imens (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 20

12、00 mm (79 in.)test length.NOTE 2The 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

13、 panelsshould be easily removed to allow for daily observations of thetest assembly.5.7 A regulating 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 te

14、st 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 app

15、roved 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

16、ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. 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

17、 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 position, adjust the height of the in

18、fraredheating lamps until the test temperature is attained. This willserve as the initial lamp height. Remove the thermocouples.6.3 Test specimens of the SBS metal foil surfaced SBS-modified bitumen sheets are bonded directly to the cellularglass insulation using a pour and roll method with an Speci

19、fi-cation D312 Type IV asphalt applied at 218 6 14C (425 625F). The specimens are applied parallel to each other, andshall be separated by a distance of 40 6 10 mm (1.6 6 0.4 in.).If polyolefin film backing exists, it shall be carefully meltedaway, and dusted with a parting agent before applying the

20、specimens with asphalt.6.4 Metal reference tabs, minimum 0.5 mm (28 ga) thick,shall be attached to the foil surface at both ends of eachspecimen, and shall be used as the reference points. The metalreference tabs shall be bent at a 90 angle, and shall be adheredusing a two-component epoxy adhesive.

21、See Figs. 1-3 for metaltab shape and placement.6.5 After adhering the metal reference tabs, paint the foilsurface of the specimens using flat black spray paint. The paintprovides for consistent surface temperature regardless of themetal foil type. Avoid painting the index tabs.7. Conditioning7.1 Con

22、dition test specimens according to Test MethodsD5147.FIG. 1 Shock TableTop ViewFIG. 2 Shock TableEnd ViewsD7051 05 (2013)28. Procedure8.1 Linear transducers or dial indicators shall be mounted tothe metal base facing the metal reference tabs that are adheredto the test specimens. See Figs. 1-4. The

23、change in dimensionalmovement shall be measured between these two referencepoints.8.2 Position a minimum of two thermocouples on thesurface of the specimens. The average temperature from thethermocouples shall be used to control the surface temperatureof specimens at 73 6 5C (163 6 9F). Prior to the

24、 first heatingcycle measure and record the initial gap setting between thereference points, and use this as the zero point. During the lastFIG. 3 Shock TableSide ViewFIG. 4 Shock TableISO ViewD7051 05 (2013)3ten minutes of each cooling and heating period, measure andrecord the change in dimension (m

25、m) at each end of the testspecimens.8.3 Each cycle shall include one heating and one coolingperiod, and shall be a minimum of 6 h. The cooling period shallbe permitted to be extended to allow for non-monitored periodssuch as at night or weekends when non-automated systems arein use.8.3.1 Heating Per

26、iod4h6 10 min of heating at 73 6 5C(163 6 9F).8.3.2 Cooling Period2h6 10 min of cooling at 23 6 3C(73 6 5F).8.4 Subject the specimens to 30 cycles.NOTE 3Non-automated systems shall be permitted to be used whenautomated systems are not available.9. Calculation or Interpretation of Results9.1 Calculat

27、e the percent dimensional change for eachspecimen after each heating and cooling period. From the datacollected in 8.2, add the changes in dimension (mm) at bothends of the specimen. This is L. Divide this value by theinitial specimen length (Lo) and multiply by 100.L/Lo! 3100 5 % dimensional change

28、 per half cycle9.2 Plot the percent change in dimension after each halfcycle (after each heating period and cooling period) for bothspecimens. See Fig. 5 for an example graph showing thenumber of cycles on the X-axis and the percent (%) dimen-sional change on the Y-axis. Examine the specimens daily

29、forwrinkling, buckling, or disbonding from the insulationsubstrate, or delamination of the foil surfacing from theSBS-modified bitumen compound. If any of these conditionsare observed, the test shall be terminated. Daily examinationshall be permitted to be suspended to allow for non-monitoredperiods

30、 as described in 8.3.10. Report10.1 Report the percent dimensional change for each speci-men at the end of 30 cycles. Include the plot described in 9.2in the report. Report any wrinkling, buckling, or disbonding ofindividual specimens from the insulation substrate, or delami-nation of the foil surfa

31、cing from the SBS-modified bitumencompound, and the cycle number the observation was made.11. Precision and Bias11.1 At the present time, there is no basis for statementsconcerning the precision and bias of test results obtained fromeither within-laboratory or between-laboratory testing.12. Keywords

32、12.1 cyclic thermal shock; foil faced; modified bitumen;SBS-modified bituminous sheets; styrene-butadiene-styreneD7051 05 (2013)4ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard ar

33、e expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not

34、revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which yo

35、u may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United

36、 States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 5 Cyclic Thermal Shock Test (Sample Graph)D7051 05 (2013)5