ASTM D7636 D7636M-2011 6250 Standard Practice for Sampling and Analysis of Modified Bitumen Roof Systems《改性沥青屋面系统的抽样和分析标准操作规程》.pdf

1、Designation: D7636/D7636M 11Standard Practice forSampling and Analysis of Modified Bitumen Roof Systems1This standard is issued under the fixed designation D7636/D7636M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of l

2、ast revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice is for removing specimens from existingmodified bitumen roof membranes for visual assessment andevaluatio

3、n for abnormalities in the membrane. The roof mem-brane consists of one or more plies/sheet materials in which atleast one ply is a modified bitumen (MB) sheet, and which isinstalled with one or more of the following methods: hotasphalt, heat welding (open flame torching or heated air), coldadhesive

4、, or self-adhesive. The roof membrane may consist ofone or more plies of the following:1.1.1 SBS (styrene-butadiene-styrene), APP (attactic poly-propylene), or other polymer, modified bitumen sheet materi-als.1.1.2 An exposed modified bitumen sheet material, that is, amodified cap sheet, covering mu

5、ltiple layers of built-up roofing(BUR) plies.1.1.3 Any adhesive or bitumen component used to installthe roof membrane.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, eachsy

6、stem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for in

7、formation onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2D1079 Terminology Relating to Roofing and Waterproofing3. Terminology3.1 DefinitionsFor definitions of terms used in this prac-tice, refer to Terminology D1079.3.2 Definitions of Terms Specific to This Standard:

8、3.2.1 hybrid membrane system, nMB/BUR roof mem-brane consisting of a modified bitumen cap sheet with one ormore layers of underlying BUR.3.2.2 ply or sheet material, na single layer of the modifiedbitumen roof membrane.4. Sampling4.1 Unless otherwise specified, for each abnormal roof areatake at lea

9、st one specimen from the area that exhibits anabnormality plus one “control” specimen. The control speci-men should have no obvious abnormalities and should be takenin close proximity to the sampled problem area.4.2 Additional specimens in which abnormalities are exhib-ited in the membrane may be ta

10、ken to determine the extent ofthe affected area.5. Test Specimen5.1 As a minimum, the roof membrane specimens should betaken down to the top surface of the membrane substrate.Sampling down to the level of the roof deck may be necessaryto better determine the cause and extent of any abnormality.5.2 T

11、he recommended minimum specimen size is 305 by305 mm 12 by 12 in. or 100 by 1120 mm 4 by 44 in.,depending on the nature of the potential membrane problem. Ifthe membrane is a hybrid BUR/MB, the 100 by 1120 mm 4 by44 in. specimen size, cutting across the width of the cap sheet,is recommended.5.2.1 Th

12、e specimen size and shape may be adjusted, onceinitial sampling has occurred, to adequately assess the nature ofany problem.6. Significance and Use6.1 This practice is for removing specimens from existingmodified bitumen roof membranes for visual assessment andevaluation for abnormalities in the mem

13、brane.6.2 This practice is not intended for roofs under construc-tion.1This practice is under the jurisdiction ofASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.20 on RoofingMembrane Systems.Current edition approved July 1, 2011. Published July 201

14、1. DOI: 10.1520/D7636_D7636M-11.2For 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.1Copyright ASTM International

15、, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Procedure7.1 Photograph the roof and the sampling process. (Whenvideo imaging is used, still images shall also be included.)Photos/images should include:7.1.1 Photos that show appropriate detail of the area to b

16、etested and of the sampling process, including but not limited to,various angles of the building, the buildings surroundings,overall roof area, and other building components that couldappear in any way be associated with the abnormalities that arepresent.7.1.2 Close up photos as well as general over

17、view photos ofthe area to be sampled, and of sampling process. Takelayer-by-layer photos if the membrane delaminates duringsampling.7.2 Specimens should be marked, photographed, and re-corded in such a way that they are easily referenced if sent outfor further evaluation.7.3 Remove the membrane spec

18、imen from the roof assem-bly taking care during the extraction process so as not toadversely affect the in-situ condition of membrane, that is, doesnot crimp or otherwise damage the integrity of the membrane.7.4 Visually inspect each specimen for abnormalities. Ab-normalities of the roof membrane on

19、 the surface, in thecross-section of the sheet materials, in the interply, or betweenthe bottom ply and the top of the membrane substrate mayinclude, but are not limited to:7.4.1 Voids of any size: interply, in the cross-section of thesheet materials, and/or membrane to substrate.7.4.2 Inadequate ad

20、hesion; interply and/or membrane tosubstrate.7.4.3 Blisters of any shape or size.7.4.4 Mole runs.7.4.5 Wrinkling.7.4.6 Shrinkage.7.4.7 Loss, or excessive wear, of surfacing.7.4.8 Number of plies against that specified, if known.7.5 If specimens are removed from the roof to be trans-ported to another

21、 site, protect each from physical damage suchas bending or breakage of the sheet materials or coating layersduring removal and transportation. Protect from moisture,excessive heat, and loss of material.7.5.1 Specimens should be individually packaged and thenplaced and sealed in an appropriate wrappi

22、ng or container topreserve the condition of the specimen as much as possible.7.6 Repairs to sampled areas should be made with like,compatible materials, and in accordance with the membranemanufacturers recommendations whenever the manufacturercan be identified.8. Report8.1 The report should include

23、the following:8.1.1 If the sample is taken down to the deck, describe thedeck, any vapor retarder/secondary roof membrane, insulation,and adhesive layers over which the modified bitumen mem-brane has been applied (as much as can be visually determinedin the field).8.1.2 The number, and type and desc

24、ription of plies, and anyinterlayer adhesives (as much as can be visually determined inthe field).8.1.3 Any abnormalities in the system, for example, thoselisted in Section 7. The report shall include a detailed descrip-tion of any abnormalities in the specimen as prescribed inSection 7. Include acc

25、ompanying field and laboratory photog-raphy with the description of the abnormalities.8.1.4 Comments on the presence of any moisture or voidsbetween plies observed.8.1.5 Location of each specimen on a roof plan.9. Keywords9.1 APP; heat welding cold adhesive; hot asphalt; interply;modified bitumen; p

26、lies; SBS; self-adhesiveASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringe

27、ment 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 revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard o

28、r for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views k

29、nown 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 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/).D7636/D7636M 112