1、Designation: D6464 03a (Reapproved 2009)1Standard 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 cas
2、e 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.1NOTEEditorial changes were made throughout in November 2009.1. Scope*1.1 This specification establishe
3、s minimum performancerequirements for determining strength, aging, 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 ad
4、hesives and adhesivebonds.1.2 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 information onlyand are not considered standard.1.3 This standard does not purport to address all of thesaf
5、ety 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:2C1396/C1396M Specification for
6、Gypsum BoardD905 Test Method for Strength 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
7、 this specification are de-fined in Terminology 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 adhe
8、sivesused to bond the back surface of gypsum 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.
9、3 The adhesive is not considered a substitute 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 performanc
10、e certifica-tion and quality control programs, 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 fi
11、nal assembly, but indicate a set of perfor-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.1This spec
12、ification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved Nov. 1, 2009. Published December 2009. Originallyapproved in 1999. Last previous edition approved in 2003 as D6464 - 03a1. D
13、OI:10.1520/D6464-03a09e01.2For 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.1*A Summary of Changes section appe
14、ars at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 Storage LifeThe adhesive shall remain serviceableand meet all the requirements of this specification for not lessthan six months after delivery, when
15、stored in original un-opened containers at temperatures ranging from 40 to 85F(4 to 30C).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 fo
16、amadhesive.7.2 Gypsum Wallboard12 in. (12.7 mm) thick, complyingwith Specification C1396/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
17、 faceand back veneers. The test specimen dimensions are specifiedin each test.7.4 Douglas-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
18、ends of the block as abonding surface and should be an edge grain face.7.5 Tensile Test FixtureAn 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
19、. 120 grit, 3/0.7.7 Plywood Shim4 by 312 in. or 4 by 4 in. (101.6 by 88.9mm or 101.6 by 101.6 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 FolderP
20、lain manila paper, 11 point weight,(.011-in. (0.28-mm) thick).7.9 Vinyl-Covered WallboardA 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 mi
21、l thicknesssheet.7.12 Steel Mandrel1 in. (25.4 mm) diameter steel rod orpipe section with smooth and uniform surface.7.13 Tension RodA steel rod for connecting the tensiletest specimen assembly to the test machine.7.14 Testing MachineAny suitable testing machine that iscapable of operation at a cons
22、tant rate of motion of themoveable head and has an accuracy of 61 % when calibratedin accordance with Practices E4 requirements.7.15 Compression Shear Test FixtureA compression-shear apparatus that is similar to, but of a larger scale than thefixture recommended in Test Method D905. A similar fixtur
23、e isshown in Fig. 2.TABLE 1 Adhesive Properties and Performance RequirementsTest Method Section 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 d
24、ays at STD. COND., + cyclic 32 psi (220 kPa) minlab exposure, + 2 days at STD. COND.10.1.7 resistance 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
25、 at STD. COND. 15 psi (103 kPa) min10.2.2 tensile strength 14 days at STD. COND. 25 psi (172 kPa) 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.
26、4.2 wet out spatula applied good wetting propertyAdhesive aging 10.5 accelerated aging 500 h at 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
27、laminating adhesivefor vinyl-covered wallboard10.7 compatibility 24 h at 100F (38C) no blistering, 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. CON
28、D. intact adhesive bond line, reportlength and paper failure % Corrected editorially.FIG. 1 Tensile Strength Test Specimen AssemblyD6464 03a (2009)127.16 Wood Screw with Eyelet#6by112 in. (38.1 mm)long,38 in. (19.5 mm) inside diameter eyelet.7.17 Scaffolding Nails6d, double-head, smooth shaft,0.113-
29、in. (2.870-mm) diameter 2 in. (51 mm) long.8. Sampling8.1 The test adhesive sample size of 1 qt (approximately1 L) is a minimum amount to complete one full series oftesting. The sample is to be handled and stored according to themanufacturers recommendations. The sample is to be repre-sentative of t
30、he final product for which recognition is sought.9. Conditioning of Materials and Adhesives9.1 Standard condition will 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 describe
31、d in9.1. (The Douglas-fir lumber and plywood should not vary by0.5 % after consecutive weighings.)10. Test Methods10.1 Shear Strength (Rate-of-Shear Strength Development):10.1.1 Preparation of Wallboard-Plywood LaminatesThegypsum wallboard must be reinforced with plywood. Theplywood reinforced gypsu
32、m wallboard is referred to as thewallboard-plywood laminate. Each laminate is made by bond-ing the front surface of a piece of 4 by 312 by12 in. (101.6 by88.9 by 12.7 mm) thick wallboard to a34 or2332 in. (19 or18.3 mm) thick plywood piece of the same dimensions with acommercially available adhesive
33、. The grain of the wallboardback surface facing paper shall run parallel with the 312 in. (89mm) direction. Cure the adhesive 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
34、AssemblyPrepare the test as-sembly by bondinga4by312 by34 or2332 in. (102 by 89 by19 mm) piece of plywood (7.3) to the 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.
35、 Drill two pilot holes through the wallboard-plywoodlaminate. Use a standard 0.125 in. (3.175 mm) drill bit andlocate 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 se
36、t at the manufacturers rec-ommended bead size. The amount of adhesive should besufficient to cover the entire bond area 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 overl
37、apping exactly 212 6116 in.(63.5 mm), thus forming the approximate 10 in.2(64.5 cm2)bonded area (see Fig. 3).10.1.2.5 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 s
38、pecimen positioned horizontally on a firm surface and thewallboard plywood laminate piece on top, install two 6dscaffolding 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 agai
39、nstthe nail shaft and interfering with the uniform compression at the bondline. Carefully and uniformly set the nails 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-fol
40、ding nails. Remove the spacers and cut away the excessadhesive from the bonded edges. Do not disturb the alignmentof the 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 Fi
41、g. 2.The bottom edge of the wallboard-plywood laminate shall reston a self-aligning seat as the test loading is simultaneouslyapplied to the top edge of the plywood. The stress applied mustbe parallel and uniformly distributed to the joint (shear plane)FIG. 2 Shear Strength Test Specimen AssemblyFIG
42、. 3 Predrilled Shear Test Specimen Prior to AssemblyD6464 03a (2009)13and must require careful orientation using shims 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 tes
43、t assemblymaintains proper alignment throughout the test. The testfixtures cannot in any way cause stress measurement error(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 She
44、ar 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 aging 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 assemblie
45、s using the procedure in10.1.1 and 10.1.2.10.1.5.2 After aging the assemblies 14 days at standardcondition (9.1), determine 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 A
46、fter aging the assemblies 14 days at standardcondition (9.1), process the assemblies through four completecycles (see Table 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
47、 and determine the shearstrength in accordance with 10.1.3.10.1.7 Resistance to Static Load in Shear:10.1.7.1 Prepare ten 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
48、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) at73
49、6 2F (23 6 1C) and five assemblies to 20 lb (89 N) at100 6 2F (38 6 1C) for a period of 24 h. When testing,clamp the top (wallboard/plywood) of the assembly to a rigidframe and attach the load to the bottom (plywood), makingsure that perfect alignment of the suspended assembly and theloads are achieved.10.1.7.4 At the end of each conditions 24-h period, exam-ine each test specimen assembly for bond separation andslippage between the wallboard-plywood laminate and theplywood adherend. Slippage or separ
