ASTM D7119-2007 Standard Guide for Sampling Spray Polyurethane Foam and Coating in Roofing《屋面材料中喷雾聚氨酯泡沫和涂料的抽样用标准指南》.pdf

1、Designation: D 7119 07Standard Guide forSampling Spray Polyurethane Foam and Coating inRoofing1This standard is issued under the fixed designation D 7119; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A

2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers the removal of test specimens fromspray polyurethane foam (SPF) roofing systems in the field forthe purpose of exam

3、ination of an existing system and/or qualityassurance for new installations. It describes the types andpurposes of sample cuts, visual inspection techniques, labora-tory physical property tests, and repair of the core and slitsample holes.1.2 This standard does not purport to address all of thesafet

4、y 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:2C 1029 Specification for Spray-Ap

5、plied Rigid CellularPolyurethane Thermal InsulationD 1079 Terminology Relating to Roofing and Waterproof-ingD 1621 Test Method for Compressive Properties Of RigidCellular PlasticsD 1622 Test Method for Apparent Density of Rigid CellularPlasticsD 4442 Test Methods for Direct Moisture Content Measure-

6、ment of Wood and Wood-Base MaterialsD 6705 Guide for Repair and Recoat of Spray PolyurethaneFoam Roofing Systems3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D 1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 core samples, ncylindrical sections of approxi-

7、mately 50 to 75 mm (2 to 3 in.) in diameter. They shall be cutusing a round metal template or coring tool, and they shallextend from surface down to but not through the substrate.3.2.2 slit samples, ncrescent-shaped samples approxi-mately 13 mm (12 in.) wide, 19 mm (34 in.) deep, and 50 to 75mm (2 t

8、o 3 in.) long, cut with a sharp knife. Slit samples areused to examine the uppermost polyurethane foam layers andthe coating system.3.3 lift, nan individual layer of polyurethane foam thatresults from a single pass of the spray gun.4. Significance and Use4.1 Adequate coating thickness (mil thickness

9、) is necessaryto protect polyurethane foam from the effects of ultravioletdegradation. This guide outlines general procedures for sam-pling and measuring the coating thickness by using slit or coresamples.4.2 Thickness of individual lifts of sprayed foam will havea bearing upon foam stability. Core

10、samples are used todetermine foam thickness. Compressive strength and coredensity affect resistance to foot traffic and impact. Specimensfrom core samples are used to determine these properties usingTest Methods D 1621 and D 1622. Visual examinations of corespecimens also indicate the quality of adh

11、esion of the coatingand the foam, between foam lifts, and between foam andsubstrate.4.3 Slit samples are used to visually examine the foams cellstructure, the number of coating layers applied, dry filmthickness of the coating, and coating adhesion.5. Sampling for Quality Assurance of RecentlyComplet

12、ed Sprayed Polyurethane Roof Systems5.1 When specified, samples shall be taken from the SPFroofing system for quality assurance. The sampling frequencyshall be according to 5.2 and 5.3 unless another samplingfrequency has been specified.5.2 Two core samples shall be taken from the first 900m2(10 000

13、 ft2) of roof area and one for each additional 900 m2(10 000 ft2) or fraction thereof.1This guide is under the jurisdiction of ASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.06 on SprayPolyurethane Foam Roof Systems.Current edition approved July 1

14、 2007. Published August 2007.2For 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.5.3 When specified, six slit samples shall be taken for every900 m2(10 000 ft2).6. Sampling Existing Spray Polyurethane Roof Systems6.1 Core or slit samples, or both, shall be taken as needed toestablish the general

16、condition of the spray polyurethane foamand coating.6.2 Core samples are used to determine adhesion, moisturecontent, and general conditions in order to determine whetherreapplication of polyurethane foam or coating is appropriate, inaccordance with Guide D 6705.7. Inspection7.1 In locations where a

17、 slit sample is to be removed, ameasuring probe can first be inserted through the coating andfoam to measure the foam depth.7.2 Measure the coating thickness on the slit sample with anoptical comparator and record the coating thickness.7.3 Visually inspect core specimens for cell structure andcondit

18、ion of foam, adhesion of coating to foam and adhesionbetween polyurethane foam layers.7.4 Compressive strength is determined using Test MethodD 1621. Density is determined by Test Method D 1622. Mois-ture content is determined using Test Method D 4442.8. Repair of Holes Made by Removal of Core or Sl

19、itSamples8.1 Holes left by removal of core samples shall be filledwith polyurethane foam or a polyisocyanurate foam plug set incompatible sealant. Use silicone sealant for repairing silicone-coated systems, polyurethane sealant for polyurethane coatedsystems, and acrylic sealant for acrylic-coated r

20、oof systems.The density and compressive strength of replacement polyure-thane foam shall be equal to or slightly greater in than thatprescribed in Specification C 1029, Type III.8.2 After filling the hole where the core was removed withpolyurethane foam or a close fitting polyurethane plug, thesurfa

21、ce shall be sealed. Apply sufficient compatible sealant tocompletely cover the plug and to extend onto the coatedsurface, or apply a coating system that is compatible in type tothe existing coating system and is applied according to themanufacturers recommendations. Reapply roofing granuleswhen need

22、ed to better match the roof surface.8.3 Holes left by removal of slit samples shall be filled withcompatible sealant (and slightly overfilled to compensate forshrinkage). The sealant shall be carried approximately 25 mm(1.0 in.) onto the adjacent, intact coating.9. Report9.1 The report should includ

23、e the following:9.1.1 Description of the coating system, noting granules ifpresent; number of base and topcoats and color of topcoat.9.1.2 Minimum and average thickness of base and topcoats.9.1.3 Location of core and slit samples on a roof plan.9.1.4 Number of foam passes and average thickness of ea

24、chpass.9.1.5 Compressive strength and density of foam, if deter-mined.9.1.6 Comments on adhesion between sample components,foam layers, blisters, friable foam, and other visual defects.9.1.7 Moisture content of foam if determined.10. Keywords10.1 coating thickness; core samples, roofing; polyurethan

25、efoam lifts; slit samples; sprayed polyurethane foamASTM 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 rig

26、hts, 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 revised, either reapproved or withdrawn. Your comments are invited either for

27、 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 you may attend. If you feel that your comments have not received a fair hearing

28、 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 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).D7119072