1、Designation: D6464 03a (Reapproved 2017)Standard Specification forExpandable Foam Adhesives for Fastening GypsumWallboard to Wood Framing1This standard is issued under the fixed designation D6464; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 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 specification establishes minimum performancerequirements for determining strength, agi
3、ng, and workingproperties of expandable foam adhesives intended for bondingback surfaces of gypsum wallboards of all thicknesses to woodframing. Minimum physical and performance requirements arespecified for all measured properties of adhesives and adhesivebonds.1.2 The values stated in inch-pound u
4、nits are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespons
5、ibility 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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established i
6、n 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:2C1396/C1396M Specification for Gypsum BoardD905 Test Method for Strengt
7、h Properties of AdhesiveBonds in Shear by Compression LoadingD907 Terminology of AdhesivesE4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3. Terminology3.1 DefinitionsMany terms in this specification are de-fined in Term
8、inology D907.3.2 Definitions of Terms Specific to This Standard:3.2.1 expandable foam adhesive, nany polymer that ex-pands during delivery or cure to fill the space betweensubstrates.4. Significance and Use4.1 This specification applies to expandable foam adhesivesused to bond the back surface of gy
9、psum wallboard toDouglas-fir dimensional lumber or other lumber species ofequivalent bonding qualities capable of meeting the testrequirements.4.2 The specification establishes the minimum strengthrequirements of the bond for the selected assembly materials.4.3 The adhesive is not considered a subst
10、itute for mechani-cal fasteners. Fasteners will be required to restrict expansion ofthe foam adhesive while it cures. The recommended fasteningschedule must appear in the manufacturers application instruc-tions.4.4 The tests are suitable for product performance certifica-tion and quality control pro
11、grams, and can be useful to thegeneral public, adhesive manufacturers, distributors, specifiers,architects, contractors, testing laboratories and other businessesand professionals.4.5 The results do not include all possible conditions, whichmay occur during final assembly, but indicate a set of perf
12、or-mance characteristics for laboratory controlled bonding vari-ables.5. Adhesive Physical Property Requirements5.1 Open Assembly TimeThese adhesives have a distinctopen assembly time and this time must be agreed upon by theuser and the manufacturer.5.2 Storage LifeThe adhesive shall remain servicea
13、bleand meet all the requirements of this specification for not less1This specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved April 1, 2017. Published May 2017. Originallyap
14、proved in 1999. Last previous edition approved in 2009 as D6464 - 03a (2009)1.DOI: 10.1520/D6464-03AR17.2For 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 standard
15、s 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 Decisio
16、n on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1than six months after delivery, when stored in original un-opened containers at temperatures ranging from 40 to 85F (4to 30C).
17、6. Adhesive Properties and Performance6.1 The adhesives shall conform to the requirements sum-marized in Table 1.7. Materials and Apparatus for Conducting Tests7.1 AdhesivesThe adhesive shall be an expandable foamadhesive.7.2 Gypsum Wallboard12 in. (12.7 mm) thick, complyingwith Specification C1396/
18、C1396M; the dimensions are speci-fied in each test.7.3 Plywood34 or2332 in. (19 or 18.3 mm)-thick U.S.Product Standard PS-1-95 grade marked stamped, commercialplywood, Exterior, Group 1 Species, A-A or A-B grade faceand back veneers. The test specimen dimensions are specifiedin each test.7.4 Douglas
19、-Fir Lumber112 by 112 by 312 in. (38 by 38by 89 mm), clear, dry lumber, (moisture content of 8 to 10 %),with the bonding surface free of bark, knots, splits, and pitch.NOTE 1The tensile test will use one of the ends of the block as abonding surface and should be an edge grain face.7.5 Tensile Test F
20、ixtureAn assembly of one, 5 by 5 in.(127 by 127 mm) by12 in. (6.35 mm) thick steel plate and two6 in. long sections of 112 by 112 (38.1 by 38.1 mm) by14 in.(6.4 mm) thick steel angles (Fig. 1).7.6 Garnet PaperNo. 120 grit, 3/0.7.7 Plywood Shim4by312 in. or 4 by 4 in. (101.6 by 88.9mm or 101.6 by 101
21、.6 mm) piece of34-in. (19-mm) or2332-in.(18.3-mm) thick U.S. Product Standard PS-1-95 grade markedstamped, commercial plywood, Exterior, Group 1 Species,A-Aor A-B grade face and back veneers.7.8 Manila FolderPlain manila paper, 11 point weight,(.011-in. (0.28-mm) thick).7.9 Vinyl-Covered WallboardA
22、manufactured productconsisting of gypsum wallboard with 2 mil minimum thicknessvinyl overlay bonded to the wallboard front face.7.10 1-Pt and 1-Gal Non-Reactive Metal Can.7.11 Food Wrap Polyethylene Film0.8 mil thicknesssheet.7.12 Steel Mandrel1 in. (25.4 mm) diameter steel rod orpipe section with s
23、mooth and uniform surface.7.13 Tension RodAsteel rod for connecting the tensile testspecimen assembly to the test machine.7.14 Testing MachineAny suitable testing machine that iscapable of operation at a constant rate of motion of themoveable head and has an accuracy of 61 % when calibratedin accord
24、ance with Practices E4 requirements.7.15 Compression Shear Test FixtureAcompression-shearapparatus that is similar to, but of a larger scale than the fixturerecommended in Test Method D905.Asimilar fixture is shownin Fig. 2.TABLE 1 Adhesive Properties and Performance RequirementsTest Method Section
25、Property Condition RequirementsRate of shear strength 10.1.4 shear strength 24 h at STD. COND. 10 psi (69 kPa) min10.1.5 shear strength 14 days at STD. COND. 40 psi (276 kPa) min10.1.6 shear strength 14 days at STD. COND., + cyclic 32 psi (220 kPa) minlab exposure, + 2 days at STD. COND.10.1.7 resis
26、tance to static load in shear (a) 40 lb (178 N) for 24 h at STD. COND. no bond separation(b) 20 lb (89 N) for 24 h at 100F (38C) no bond separationRate of strength development 10.2.2 tensile strength 24 h at STD. COND. 15 psi (103 kPa) min10.2.2 tensile strength 14 days at STD. COND. 25 psi (172 kPa
27、) minAdhesive open-time determination 10.3 open time 24 h at STD. COND. 75 % paper transfer, minSubstrate wet-out by adhesive1. Plywood 10.4.1 wet out spatula applied good wetting property2. Wallboard 10.4.2 wet out spatula applied good wetting propertyAdhesive aging 10.5 accelerated aging 500 h at
28、158F (70C) no cracking or chippingFreeze thaw stability 10.6 low temperature storage 3 cycles of 24 h at 0F + 24 h atSTD. COND.no change in workability; 10 psi(69 kPa) shear strength, minSuitability of a laminating adhesivefor vinyl-covered wallboard10.7 compatibility 24 h at 100F (38C) no blisterin
29、g, vinyl-filmdiscoloration, or bond failureSuitability for Stain Resistance forVinyl-covered wallboard10.8 staining 1 h at STD. COND. no swelling or discolorationBridging 10.9 gap-filling 48 h at STD. COND. intact adhesive bond line, reportlength and paper failure %FIG. 1 Tensile Strength Test Speci
30、men AssemblyD6464 03a (2017)27.16 Wood Screw with Eyelet#6 by 112 in. (38.1 mm)long,38 in. (19.5 mm) inside diameter eyelet.7.17 Scaffolding Nails6d, double-head, smooth shaft,0.113-in. (2.870-mm) diameter 2 in. (51 mm) long.8. Sampling8.1 The test adhesive sample size of 1 qt (approximately 1L) is
31、a minimum amount to complete one full series of testing.The sample is to be handled and stored according to themanufacturers recommendations. The sample is to be repre-sentative of the final product for which recognition is sought.9. Conditioning of Materials and Adhesives9.1 Standard condition will
32、 be defined as being 73 6 2F(23 6 1C) and 50 6 5 % relative humidity.9.2 Condition the Douglas-fir lumber, plywood, gypsumwallboard, and plain manila file folder for 48 h as described in9.1. (The Douglas-fir lumber and plywood should not vary by0.5 % after consecutive weighings.)10. Test Methods10.1
33、 Shear Strength (Rate-of-Shear Strength Development):10.1.1 Preparation of Wallboard-Plywood LaminatesThegypsum wallboard must be reinforced with plywood. Theplywood reinforced gypsum wallboard is referred to as thewallboard-plywood laminate. Each laminate is made by bond-ing the front surface of a
34、piece of 4 by 312 by12 in. (101.6 by88.9 by 12.7 mm) thick wallboard to a34 or2332 in. (19 or 18.3mm) thick plywood piece of the same dimensions with acommercially available adhesive. The grain of the wallboardback surface facing paper shall run parallel with the 312 in. (89mm) direction. Cure the a
35、dhesive in accordance with theadhesive manufacturers recommendations. Condition thewallboard-plywood laminate to a constant weight in accor-dance with 9.2.10.1.2 Preparation of Test AssemblyPrepare the test as-sembly by bondinga4by312 by34 or2332 in. (102 by 89 by19 mm) piece of plywood (7.3) to the
36、 previously preparedlaminate as follows and shown in Fig. 3.10.1.2.1 Sand the face of the34-in. (19-mm) thick plywoodsmooth with garnet paper and wipe the sanded surface free ofdust. Drill two pilot holes through the wallboard-plywoodlaminate. Use a standard 0.125 in. (3.175 mm) drill bit andlocate
37、each pilot hole at38-in. (9.5 mm) from the sides and78-in. (22-mm) from the overlapped end.10.1.2.2 Apply the adhesive on the sanded surface with theself-contained delivery system set at the manufacturers rec-ommended bead size. The amount of adhesive should besufficient to cover the entire bond are
38、a without gaps in theadhesive.10.1.2.3 Allow an open time of 30 6 5 s upon completionof spreading.10.1.2.4 Squarely position the wallboard-plywood laminateon the coated plywood overlapping exactly 212 6116 in. (63.5mm), thus forming the approximate 10 in.2(64.5 cm2) bondedarea (see Fig. 3).10.1.2.5
39、Insert six wire spacers (No. 20 gage) at least 2 in.(51 mm) long into the adhesive bondline joint. Position thespacers so that they are at each end of the test region. With thetest specimen positioned horizontally on a firm surface and thewallboard plywood laminate piece on top, install two 6dscaffo
40、lding nails into the predrilled pilot holes.NOTE 2The pilot hole diameter should be slightly larger than the naildiameter. This is necessary to prevent the laminate from binding againstthe nail shaft and interfering with the uniform compression at the bondline. Carefully and uniformly set the nails
41、into the lower plywood piece.Drive the nails until the scaffold head initially encounters the wallboard-plywood laminate.10.1.2.6 After the adhesive has hardened, remove the scaf-folding nails. Remove the spacers and cut away the excessadhesive from the bonded edges. Do not disturb the alignmentof t
42、he bond line.10.1.3 Shear StrengthDynamic Loading DeterminationFollowing the appropriate conditioning, test the specimen inshear using a compression-shear test fixture as shown in Fig. 2.The bottom edge of the wallboard-plywood laminate shall reston a self-aligning seat as the test loading is simult
43、aneouslyFIG. 2 Shear Strength Test Specimen AssemblyFIG. 3 Predrilled Shear Test Specimen Prior to AssemblyD6464 03a (2017)3applied to the top edge of the plywood. The stress applied mustbe parallel and uniformly distributed to the joint (shear plane)and must require careful orientation using shims
44、and self-aligning apparatus as necessary. Determine the shear strengthat a cross head speed of 0.2 in. (5.1 mm)/min. Observations aremade during stress application to ensure the test assemblymaintains proper alignment throughout the test. The testfixtures cannot in any way cause stress measurement e
45、rror(s)such as with binding or friction. Report the maximum shearstrength and the average shear strengths for the 24 h, the 14day, and the cyclic exposure test conditions.10.1.4 Shear Strength After 24 h:10.1.4.1 Prepare five test assemblies using the procedure in10.1.1 and 10.1.2.10.1.4.2 After agi
46、ng the assemblies 24 6 1 h at standardcondition (9.1), determine the shear strength in accordancewith 10.1.3.10.1.5 Shear Strength After 14 Days:10.1.5.1 Prepare five test assemblies using the procedure in10.1.1 and 10.1.2.10.1.5.2 After aging the assemblies 14 days at standardcondition (9.1), deter
47、mine the shear strength in accordancewith 10.1.3.10.1.6 Shear Strength After Cyclic Exposure:10.1.6.1 Prepare five test assemblies using the procedure in10.1.1 and 10.1.2.10.1.6.2 After aging the assemblies 14 days at standardcondition (9.1), process the assemblies through four completecycles (see T
48、able 2). Store the assemblies at standard condition(9.1) for 24 h after each cycle.10.1.6.3 At the end of the cycling condition the test speci-mens for 2 days in standard conditions and determine the shearstrength in accordance with 10.1.3.10.1.7 Resistance to Static Load in Shear:10.1.7.1 Prepare t
49、en assemblies using the procedure in10.1.1 and 10.1.2. Use a razor blade to scribe a line at bothedges and perpendicular to the bond line where the gypsumwallboard-plywood laminate meets the plywood. The line willbe useful when examining the assembly for noticeable separa-tion or slippage.10.1.7.2 Condition the assemblies 14 days at standard con-dition (9.1).NOTE 3This will allow sufficient time for the adhesive to cure.10.1.7.3 Load five test assemblies to 40 lb (178 N) at 73 62F (23 6 1C) and five assemblies t
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