1、Designation: D 6464 03ae1Standard Specification forExpandable Foam Adhesives for Fastening GypsumWallboard to Wood Framing1This standard is issued under the fixed designation D 6464; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEEditorial changes were made throughout in May 2006.1. Scope*1.1 This specification establishes minimum performa
3、ncerequirements 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 adhesives and adhesi
4、vebonds.1.2 The values stated in inch-pound units are to be regardedas the standard. The SI units given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standar
5、d 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 1396/C 1396M Specification for Gypsum BoardD 905 Test Method for Strength Properties of AdhesiveBonds in Shear by Compression L
6、oadingD 907 Terminology of AdhesivesE4 Practices for Force Verification of Testing MachinesE 177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3. Terminology3.1 DefinitionsMany terms in this specification are de-fined in Terminology D 907.3.2 Definitions of Terms Specific to Th
7、is 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 gypsum wallboard toDouglas-fir dimensional lumber or o
8、ther 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 substitute for mechani-cal fasteners. Fasteners will be r
9、equired 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 programs, and can be useful to thegeneral public, adhes
10、ive 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 perfor-mance characteristics for laboratory controlled b
11、onding 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 specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct resp
12、onsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved Aug. 10, 2003. Published September 2003. Originallyapproved in 1999. Last previous edition approved in 2003 as D 6464 - 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer
13、 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 appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
14、 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 stored in original un-opened containers at temperatures ranging from 40 to 85F(4 to 30C).6. Adhesive Properties and Per
15、formance6.1 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 C 1396/C 1396M; the dimensions are s
16、peci-fied in each test.7.3 Plywood34 or2332 in. (19.0 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-Fir Lumber112 by 112 by 3
17、12 in. (38.0 by38.0 by 89.0 mm), clear, dry lumber, (moisture content of 8 to10 %), with the bonding surface free of bark, knots, splits, andpitch.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 FixtureAn assembly of
18、one, 5 by 5 in.(127 by 127 mm)-by-12 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 Shim4 by 312 in. or 4 by 4 in. (101.6 by 88.9mm or 101.6 by 101.6 mm) piece of34-
19、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,(0.011-in. (0.28 mm) thick).7.9 Vinyl-Covered WallboardA manufactured prod
20、uctconsisting 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 Mandrel1.0 in. (25.4 mm) diameter steel rod orpipe section with smooth and unifo
21、rm 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 constant rate of motion of themoveable head and has an accuracy of 61 % when calibratedin accordance with Prac
22、tices E4requirements.TABLE 1 Adhesive Properties and Performance RequirementsTest Method Section Property Condition RequirementsRate of shear strength 10.1.4 shear strength 24 h at RT 10 psi (69 kPa) min10.1.5 shear strength 14 days at RT 40 psi (276 kPa) min10.1.6 shear strength 14 days at RT, + cy
23、clic 32 psi (220 kPa) minlab exposure, + 2 days at RT10.1.7 resistance to static load in shear (a) 40 lb (178 N) for 24 h at RT no bond separation(b) 20 lb (89 N) for 24 h at 100F no bond separationRate of strength development 10.2.2 tensile strength 24 h at RT 15 psi (103 kPa) min10.2.2 tensile str
24、ength 14 days at RT 25 psi (172 kPa) minAdhesive open-time determination 10.3 open time 24 h at RT 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
25、accelerated aging 500 h at 158F no cracking or chippingFreeze thaw stability 10.6 low temperature storage 3 cycles of24hat0F+24hatRTno change in workability; 10 psi(69 kPa) shear strength, minSuitability of a laminating adhesivefor vinyl-covered wallboard10.7 compatibility 24 h at 100F no blistering
26、, vinyl-filmdiscoloration, or bond failureSuitability for Stain Resistance forVinyl-covered wallboard10.8 staining 1 h at RT no swelling or discolorationBridging 10.9 gap-filling 48 h at RT intact adhesive bond line, reportlength and paper failure % Corrected editorially.FIG. 1 Tensile Strength Test
27、 Specimen AssemblyD 6464 03ae127.15 Compression Shear Test FixtureA compression-shear apparatus that is similar to, but of a larger scale than thefixture recommended in Test Method D 905.Asimilar fixture isshown in Fig. 2.7.16 Wood Screw with Eyelet#6by112 in. (38.1 mm)long,38 in. (19.5 mm) inside d
28、iameter eyelet.7.17 Scaffolding Nails6d, double-head, smooth shaft,0.113in. (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 th
29、emanufacturers 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 be defined as being 73 6 2F(23 6 1C) and 50 6 5 % relative humidity.9.2 Condition the Douglas-fir lumber, ply
30、wood, 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 Shear Strength (Rate-of-Shear Strength Development):10.1.1 Preparation of Wallboard-Plywood LaminatesThegypsu
31、m 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 piece of 4 by 312 by12 in. (101.6 by88.9 by 12.7 mm) thick wallboard to a34 or2332 in. (19.0 or18.3 mm) thick
32、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.(89.0) direction. Cure the adhesive in accordance with theadhesive manufacturers recommendations. Condition thewallboard-plywood laminate
33、 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. (102.0 by 89.0by 19.0 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. (19.0-m
34、m) thick ply-wood smooth with garnet paper and wipe the sanded surfacefree of dust. Drill two pilot holes through the wallboard-plywood laminate. Use a standard 0.125 in. (3.175 mm) drillbit and locate each pilot hole at38-in. (9.5 mm) from the sidesand78-in. (22.2 mm) from the overlapped end.10.1.2
35、.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 area without gaps in theadhesive.10.1.2.3 Allow an open time of 30 6 5 s upon completionof spreading
36、.10.1.2.4 Squarely position the wallboard-plywood laminateon the coated plywood overlapping 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 four wire spacers (No. 20 gage) at least 2 in.(51.0-mm) long into the adhesive bondline jo
37、int. 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 6dscaffolding nails into the predrilled pilot holes.NOTE 2The pilot hole diameter should be slightly l
38、arger 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 into the lower plywood piece.Drive the nails until the scaffold head initially encounters the
39、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 the bond line.10.1.3 Shear StrengthDynamic Loading DeterminationFollowing the appropriate condi
40、tioning, test the specimen inFIG. 2 Shear Strength Test Specimen Assembly FIG. 3 Predrilled Shear Test Specimen Prior to AssemblyD 6464 03ae13shear 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 tes
41、t loading is simultaneouslyapplied 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 and self-aligning apparatus as necessary. Determine the shear strengthat a cross head speed of 0.
42、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 error(s)such as with binding or friction. Report the maximum shearstrength and the average shear s
43、trengths 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 aging the assemblies 24 6 1 h at standardcondition (9.1), remove the scaffolding nails and determine
44、 theshear strength in accordance with 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), remove the scaffolding nails and determine theshear strength in accor
45、dance with 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 Table 2). Store the assemblies a
46、t standard condition(9.1) for 24 h after each cycle.10.1.6.3 At the end of the cycling, remove the scaffoldingnails, condition the test specimens for 2 days in standardconditions and determine the shear strength in accordance with10.1.3.10.1.7 Resistance to Static Load in Shear:10.1.7.1 Prepare ten
47、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 Cond
48、ition the assemblies 14 days at standard con-dition (9.1). Remove the scaffolding nails after 14 days.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 6 2F (23 6 1C) and five assemblies to 20 lb (89 N) at38 6 1C (100.2 6 2.0F) fo
49、r 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 separation at the bond line ofthe adhesive is considered a failure. Report the results
