ASTM D6464-03a(2009)e1
(Specification)Standard Specification for Expandable Foam Adhesives for Fastening Gypsum Wallboard to Wood Framing
Standard Specification for Expandable Foam Adhesives for Fastening Gypsum Wallboard to Wood Framing
ABSTRACT
This specification establishes minimum performance requirements for determining strength, aging, and working properties of expandable foam adhesives intended for bonding back surfaces of gypsum wallboards of all thicknesses to wood framing. Minimum physical and performance requirements are specified for all measured properties of adhesives and adhesive bonds. Shear strength, tensile strength, adhesive open assembly time determination, substrate wet-out by adhesive, accelerated adhesive aging, freeze-thaw stability, suitability of a laminating adhesive for vinyl-covered wallboard, suitability for stain resistance for vinyl-covered wallboard, and gap filling tests shall be performed to conform to the specified requirements.
SCOPE
1.1 This specification establishes minimum performance requirements for determining strength, aging, and working properties of expandable foam adhesives intended for bonding back surfaces of gypsum wallboards of all thicknesses to wood framing. Minimum physical and performance requirements are specified for all measured properties of adhesives and adhesive bonds.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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´1
Designation:D6464 −03a (Reapproved 2009)
Standard Specification for
Expandable Foam Adhesives for Fastening Gypsum
Wallboard to Wood Framing
This standard is issued under the fixed designation D6464; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Editorial changes were made throughout in November 2009.
1. Scope* 3.2 Definitions of Terms Specific to This Standard:
3.2.1 expandable foam adhesive, n—any polymer that ex-
1.1 This specification establishes minimum performance
pands during delivery or cure to fill the space between
requirements for determining strength, aging, and working
substrates.
properties of expandable foam adhesives intended for bonding
backsurfacesofgypsumwallboardsofallthicknessestowood
4. Significance and Use
framing.Minimumphysicalandperformancerequirementsare
specifiedforallmeasuredpropertiesofadhesivesandadhesive
4.1 This specification applies to expandable foam adhesives
bonds.
used to bond the back surface of gypsum wallboard to
1.2 The values stated in inch-pound units are to be regarded
Douglas-fir dimensional lumber or other lumber species of
as standard. The values given in parentheses are mathematical
equivalent bonding qualities capable of meeting the test
conversions to SI units that are provided for information only
requirements.
and are not considered standard.
4.2 The specification establishes the minimum strength
1.3 This standard does not purport to address all of the
requirements of the bond for the selected assembly materials.
safety concerns, if any, associated with its use. It is the
4.3 Theadhesiveisnotconsideredasubstituteformechani-
responsibility of the user of this standard to establish appro-
calfasteners.Fastenerswillberequiredtorestrictexpansionof
priate safety and health practices and determine the applica-
the foam adhesive while it cures. The recommended fastening
bility of regulatory limitations prior to use.
schedulemustappearinthemanufacturer’sapplicationinstruc-
2. Referenced Documents
tions.
2.1 ASTM Standards:
4.4 The tests are suitable for product performance certifica-
C1396/C1396MSpecification for Gypsum Board
tion and quality control programs, and can be useful to the
D905Test Method for Strength Properties of Adhesive
generalpublic,adhesivemanufacturers,distributors,specifiers,
Bonds in Shear by Compression Loading
architects,contractors,testinglaboratoriesandotherbusinesses
D907Terminology of Adhesives
and professionals.
E4Practices for Force Verification of Testing Machines
E177Practice for Use of the Terms Precision and Bias in 4.5 Theresultsdonotincludeallpossibleconditions,which
ASTM Test Methods
may occur during final assembly, but indicate a set of perfor-
mance characteristics for laboratory controlled bonding vari-
3. Terminology
ables.
3.1 Definitions—Many terms in this specification are de-
fined in Terminology D907.
5. Adhesive Physical Property Requirements
5.1 Open Assembly Time—These adhesives have a distinct
This specification is under the jurisdiction of ASTM Committee D14 on
open assembly time and this time must be agreed upon by the
Adhesives and is the direct responsibility of Subcommittee D14.70 on Construction
user and the manufacturer.
Adhesives.
Current edition approved Nov. 1, 2009. Published December 2009. Originally
ε1
5.2 Storage Life—The adhesive shall remain serviceable
approved in 1999. Last previous edition approved in 2003 as D6464-03a . DOI:
10.1520/D6464-03A09E01.
and meet all the requirements of this specification for not less
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
than six months after delivery, when stored in original un-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
opened containers at temperatures ranging from 40 to 85°F (4
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. to 30°C).
*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 19428-2959. United States
´1
D6464−03a (2009)
6. Adhesive Properties and Performance
6.1 The adhesives shall conform to the requirements sum-
marized in Table 1.
7. Materials and Apparatus for Conducting Tests
7.1 Adhesives—The adhesive shall be an expandable foam
adhesive.
7.2 Gypsum Wallboard— ⁄2 in. (12.7 mm) thick, complying
with Specification C1396/C1396M; the dimensions are speci-
fied in each test.
3 23
7.3 Plywood— ⁄4 or ⁄32 in. (19 or 18.3 mm)-thick U.S.
Product Standard PS-1-95 grade marked stamped, commercial
plywood, Exterior, Group 1 Species, A-A or A-B grade face
and back veneers. The test specimen dimensions are specified
in each test.
1 1 1
7.4 Douglas-Fir Lumber—1 ⁄2 by 1 ⁄2 by 3 ⁄2 in. (38 by 38
FIG. 1Tensile Strength Test Specimen Assembly
by 89 mm), clear, dry lumber, (moisture content of 8 to 10%),
with the bonding surface free of bark, knots, splits, and pitch.
7.10 1-Pt and 1-Gal Non-Reactive Metal Can.
NOTE 1—The tensile test will use one of the ends of the block as a
7.11 Food Wrap Polyethylene Film—0.8 mil thickness
bonding surface and should be an edge grain face.
sheet.
7.5 Tensile Test Fixture—An assembly of one, 5 by 5 in.
(127 by 127 mm) by ⁄2 in. (6.35 mm) thick steel plate and two 7.12 Steel Mandrel—1 in. (25.4 mm) diameter steel rod or
1 1 1
6 in. long sections of 1 ⁄2 by 1 ⁄2 (38.1 by 38.1 mm) by ⁄4 in. pipe section with smooth and uniform surface.
(6.4 mm) thick steel angles (Fig. 1).
7.13 Tension Rod—Asteelrodforconnectingthetensiletest
7.6 Garnet Paper—No. 120 grit, 3/0. specimen assembly to the test machine.
7.7 Plywood Shim—4by3 ⁄2in.or4by4in.(101.6by88.9 7.14 Testing Machine—Any suitable testing machine that is
3 23
mm or 101.6 by 101.6 mm) piece of ⁄4-in. (19-mm) or ⁄32-in. capable of operation at a constant rate of motion of the
(18.3-mm) thick U.S. Product Standard PS-1-95 grade marked moveable head and has an accuracy of 61% when calibrated
stamped,commercialplywood,Exterior,Group1Species,A-A in accordance with Practices E4 requirements.
or A-B grade face and back veneers.
7.15 CompressionShearTestFixture—Acompression-shear
7.8 Manila Folder—Plain manila paper, 11 point weight, apparatusthatissimilarto,butofalargerscalethanthefixture
(.011-in. (0.28-mm) thick). recommendedinTestMethodD905.Asimilarfixtureisshown
in Fig. 2.
7.9 Vinyl-Covered Wallboard—A manufactured product
consistingofgypsumwallboardwith2milminimumthickness 7.16 Wood Screw with Eyelet—#6 by 1 ⁄2 in. (38.1 mm)
vinyl overlay bonded to the wallboard front face. long, ⁄8 in. (19.5 mm) inside diameter eyelet.
TABLE 1 Adhesive Properties and Performance Requirements
Test Method Section Property Condition Requirements
Rate of shear strength 10.1.4 shear strength 24 h at STD. COND. 10 psi (69 kPa) min
10.1.5 shear strength 14 days at STD. COND. 40 psi (276 kPa) min
10.1.6 shear strength 14 days at STD. COND., + cyclic 32 psi (220 kPa) min
lab 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 100°F (38°C) no bond separation
Rate of strength development 10.2.2 tensile strength 24 h at STD. COND. 15 psi (103 kPa) min
10.2.2 tensile strength 14 days at STD. COND. 25 psi (172 kPa) min
Adhesive open-time determination 10.3 open time 24 h at STD. COND. 75 % paper transfer, min
Substrate wet-out by adhesive
1. Plywood 10.4.1 wet out spatula applied good wetting property
2. Wallboard 10.4.2 wet out spatula applied good wetting property
Adhesive aging 10.5 accelerated aging 500 h at 158°F (70°C) no cracking or chipping
Freeze thaw stability † 10.6 low temperature storage 3 cycles of 24 h at 0°F + 24 h at no change in workability; 10 psi
STD. COND. (69 kPa) shear strength, min
Suitability of a laminating adhesive 10.7 compatibility 24 h at 100°F (38°C) no blistering, vinyl-film
for vinyl-covered wallboard discoloration, or bond failure
Suitability for Stain Resistance for 10.8 staining 1 h at STD. COND. no swelling or discoloration
Vinyl-covered wallboard
Bridging 10.9 gap-filling 48 h at STD. COND. intact adhesive bond line, report
length and paper failure %
† Corrected editorially.
´1
D6464−03a (2009)
FIG. 3Predrilled Shear Test Specimen Prior to Assembly
10.1.2.1 Sand the face of the ⁄4-in. (19-mm) thick plywood
smooth with garnet paper and wipe the sanded surface free of
dust. Drill two pilot holes through the wallboard-plywood
FIG. 2Shear Strength Test Specimen Assembly
laminate. Use a standard 0.125 in. (3.175 mm) drill bit and
locate each pilot hole at ⁄8-in. (9.5 mm) from the sides and
7.17 Scaffolding Nails—6d, double-head, smooth shaft,
⁄8-in. (22-mm) from the overlapped end.
0.113-in. (2.870-mm) diameter 2 in. (51 mm) long.
10.1.2.2 Apply the adhesive on the sanded surface with the
8. Sampling self-contained delivery system set at the manufacturer’s rec-
ommended bead size. The amount of adhesive should be
8.1 The test adhesive sample size of 1 qt (approximately 1
sufficient to cover the entire bond area without gaps in the
L) is a minimum amount to complete one full series of testing.
adhesive.
The sample is to be handled and stored according to the
10.1.2.3 Allow an open time of 30 6 5 s upon completion
manufacturers recommendations. The sample is to be repre-
of spreading.
sentative of the final product for which recognition is sought.
10.1.2.4 Squarely position the wallboard-plywood laminate
1 1
on the coated plywood overlapping exactly 2 ⁄2 6 ⁄16 in. (63.5
9. Conditioning of Materials and Adhesives
2 2
mm), thus forming the approximate 10 in. (64.5 cm ) bonded
9.1 Standard condition will be defined as being 73 6 2°F
area (see Fig. 3).
(23 6 1°C) and 50 6 5% relative humidity.
10.1.2.5 Insert six wire spacers (No. 20 gage) at least 2 in.
9.2 Condition the Douglas-fir lumber, plywood, gypsum
(51 mm) long into the adhesive bondline joint. Position the
wallboard, and plain manila file folder for 48 h as described in
spacers so that they are at each end of the test region.With the
9.1. (The Douglas-fir lumber and plywood should not vary by
test specimen positioned horizontally on a firm surface and the
0.5% after consecutive weighings.)
wallboard plywood laminate piece on top, install two 6d
scaffolding nails into the predrilled pilot holes.
10. Test Methods
NOTE 2—The pilot hole diameter should be slightly larger than the nail
10.1 Shear Strength (Rate-of-Shear Strength Development):
diameter. This is necessary to prevent the laminate from binding against
10.1.1 Preparation of Wallboard-Plywood Laminates—The
the nail shaft and interfering with the uniform compression at the bond
gypsum wallboard must be reinforced with plywood. The
line. Carefully and uniformly set the nails into the lower plywood piece.
Drive the nails until the scaffold head initially encounters the wallboard-
plywood reinforced gypsum wallboard is referred to as the
plywood laminate.
wallboard-plywood laminate. Each laminate is made by bond-
1 1
ing the front surface of a piece of 4 by 3 ⁄2 by ⁄2 in. (101.6 by 10.1.2.6 After the adhesive has hardened, remove the scaf-
3 23
88.9by12.7mm)thickwallboardtoa ⁄4 or ⁄32in.(19or18.3 folding nails. Remove the spacers and cut away the excess
mm) thick plywood piece of the same dimensions with a adhesive from the bonded edges. Do not disturb the alignment
commercially available adhesive. The grain of the wallboard of the bond line.
backsurfacefacingpapershallrunparallelwiththe3 ⁄2in.(89 10.1.3 Shear Strength—Dynamic Loading Determination—
mm) direction. Cure the adhesive in accordance with the Following the appropriate conditioning, test the specimen in
adhesive manufacturer’s recommendations. Condition the shearusingacompression-sheartestfixtureasshowninFig.2.
wallboard-plywood laminate to a constant weight in accor- The bottom edge of the wallboard-plywood laminate shall rest
dance with 9.2. on a self-aligning seat as the test loading is simultaneously
10.1.2 Preparation of Test Assembly—Prepare the test as- appliedtothetopedgeoftheplywood.Thestressappliedmust
1 3 23
sembly by bondinga4by3 ⁄2 by ⁄4 or ⁄32 in. (102 by 89 by be parallel and uniformly distributed to the joint (shear plane)
19 mm) piece of plywood (7.3) to the previously prepared and must require careful orientation using shims and self-
laminate as follows and shown in Fig. 3. aligning apparatus as necessary. Determine the shear strength
´1
D6464−03a (2009)
atacrossheadspeedof0.2in.(5.1mm)/min.Observationsare 10.1.7.4 At the end of each condition’s 24-h period, exam-
made during stress application to ensure the test assembly ine each test specimen assembly for bond separation and
maintains proper alignment throughout the test. The test slippage between the wallboard-plywood laminate and the
fixtures cannot in any way cause stress measurement error(s) plywood adherend. Slippage or separation at the bond line of
such as with binding or friction. Report the maximum shear the adhesive is considered a failure. Report the results of
strength and the average shear strengths for the 24 h, the 14 analysisforeachofthefivestaticloadsheartestspecimensfor
day, and the cyclic exposure test conditions. both conditions.
10.1.4 Shear Strength After 24 h:
10.2 Tensile Strength (Rate of Strength Development):
10.1.4.1 Prepare five test assemblies using the procedure in
10.2.1 Preparation of Wallboard-Plywood Laminates—
10.1.1 and 10.1.2.
Prepare the laminates using the same procedure in 10.1.1, but
10.1.4.2 After aging the assemblies 24 6 1 h at standard
with 4 by 4 in. (101.6 by 101.6 mm) gypsum wallboard and
condition (9.1), determine the shear strength in accordance
plywood shims, or without plywood shim as shown in Fig. 1.
with 10.1.3.
Drill one pilot hole with a 0.125 in. (3.2 mm) drill bit through
10.1.5 Shear Strength After 14 Days:
thecenterofthewallboard–plywoodlaminate.Thepilotholeis
10.1.5.1 Prepare five test assemblies using the procedure in
for the installation of the 6d scaffolding nail to be used for the
10.1.1 and 10.1.2.
Douglas-fir wood block connection.
10.1.5.2 After aging the assemblies 14 days at standard
1 1 1
10.2.1.1 Prepare the 1 ⁄2 by 1 ⁄2 by 3 ⁄2 in. (38 by 38 by 89
condition (9.1), determine the shear strength in accordance
mm) Douglas-fir wood block by drilling a pilot hole for the
with 10.1.3.
wood screw with eyelet at the exact center end of test machine
10.1.6 Shear Strength After Cycl
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D6464 – 03a (Reapproved 2009)
Designation:D6464–03a
Standard Specification for
Expandable Foam Adhesives for Fastening Gypsum
Wallboard to Wood Framing
This standard is issued under the fixed designation D6464; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Editorial changes were made throughout in May 2006.November 2009.
1. Scope*
1.1 This specification establishes minimum performance requirements for determining strength, aging, and working properties
of expandable foam adhesives intended for bonding back surfaces of gypsum wallboards of all thicknesses to wood framing.
Minimum physical and performance requirements are specified for all measured properties of adhesives and adhesive bonds.
1.2The values stated in inch-pound units are to be regarded as the standard.The SI units given in parentheses are for information
only.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C1396/C1396M Specification for Gypsum Board
D905 Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading
D907 Terminology of Adhesives
E4 Practices for Force Verification of Testing Machines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3. Terminology
3.1 Definitions—Many terms in this specification are defined in Terminology D907.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 expandable foam adhesive, n—any polymer that expands during delivery or cure to fill the space between substrates.
4. Significance and Use
4.1 This specification applies to expandable foam adhesives used to bond the back surface of gypsum wallboard to Douglas-fir
dimensional lumber or other lumber species of equivalent bonding qualities capable of meeting the test requirements.
4.2 The specification establishes the minimum strength requirements of the bond for the selected assembly materials.
4.3 The adhesive is not considered a substitute for mechanical fasteners. Fasteners will be required to restrict expansion of the
foam adhesive while it cures. The recommended fastening schedule must appear in the manufacturer’s application instructions.
4.4 The tests are suitable for product performance certification and quality control programs, and can be useful to the general
public, adhesive manufacturers, distributors, specifiers, architects, contractors, testing laboratories and other businesses and
professionals.
4.5 The results do not include all possible conditions, which may occur during final assembly, but indicate a set of performance
characteristics for laboratory controlled bonding variables.
This specification is under the jurisdiction ofASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.
Current edition approved Aug. 10, 2003. Published September 2003. Originally approved in 1999. Last previous edition approved in 2003 as D6464-03. DOI:
10.1520/D6464-03AE01.
´1
Current edition approved Nov. 1, 2009. Published December 2009. Originally approved in 1999. Last previous edition approved in 2003 as D6464 - 03a . DOI:
10.1520/D6464-03a09e01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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 19428-2959, United States.
´1
D6464 – 03a (2009)
D6464–03a
5. Adhesive Physical Property Requirements
5.1 Open Assembly Time—These adhesives have a distinct open assembly time and this time must be agreed upon by the user
and the manufacturer.
5.2 Storage Life—The adhesive shall remain serviceable and meet all the requirements of this specification for not less than six
months after delivery, when stored in original unopened containers at temperatures ranging from 40 to 85°F
(4 to 30°C).
6. Adhesive Properties and Performance
6.1 The adhesives shall conform to the requirements summarized in Table 1.
7. Materials and Apparatus for Conducting Tests
7.1 Adhesives—The adhesive shall be an expandable foam adhesive.
7.2 Gypsum Wallboard— ⁄2 in. (12.7 mm) thick, complying with Specification C1396/C1396M; the dimensions are specified in
each test.
3 23
7.3 Plywood— ⁄4 or ⁄32 in. (19.0(19 or 18.3 mm)-thick U.S. Product Standard PS-1-95 grade marked stamped, commercial
plywood, Exterior, Group 1 Species,A-AorA-B grade face and back veneers. The test specimen dimensions are specified in each
test.
1 1 1
7.4 Douglas-Fir Lumber—1 ⁄2 by 1 ⁄2 by 3 ⁄2 in. (38.0(38 by 38.038 by 89.089 mm), clear, dry lumber, (moisture content of 8
to 10 %), with the bonding surface free of bark, knots, splits, and pitch.
NOTE 1—The tensile test will use one of the ends of the block as a bonding surface and should be an edge grain face.
7.5 Tensile Test Fixture—An assembly of one, 5 by 5 in. (127 by 127 mm)-by-mm) by ⁄2 in. (6.35 mm) thick steel plate and
1 1 1
two 6 in. long sections of 1 ⁄2 by 1 ⁄2 (38.1 by 38.1 mm) by ⁄4 in. (6.4 mm) thick steel angles (Fig. 1).
7.6 Garnet Paper—No. 120 grit, 3/0.
1 3 23
7.7 Plywood Shim—4 by 3 ⁄2 in. or 4 by 4 in. (101.6 by 88.9 mm or 101.6 by 101.6 mm) piece of ⁄4-in. (19-mm) or ⁄32-in.
TABLE 1 Adhesive Properties and Performance Requirements
Test Method Section Property Condition Requirements
Rate of shear strength 10.1.4 shear strength 24hatRT 10 psi (69 kPa) min
Rate of shear strength 10.1.4 shear strength 24 h at STD. COND. 10 psi (69 kPa) min
10.1.5 shear strength 14 days at RT 40 psi (276 kPa) min
10.1.5 shear strength 14 days at STD. COND. 40 psi (276 kPa) min
10.1.6 shear strength 14 days at RT, + cyclic 32 psi (220 kPa) min
10.1.6 shear strength 14 days at STD. COND., + cyclic 32 psi (220 kPa) min
lab exposure, + 2 days at RT
lab exposure, + 2 days at STD. COND.
10.1.7 resistance to static load in shear (a)40lb(178 N) for24hatRT no bond separation
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 100°F no bond separation
(b) 20 lb (89 N) for 24 h at 100°F (38°C) no bond separation
Rate of strength development 10.2.2 tensile strength 24hatRT 15 psi (103 kPa) min
Rate of strength development 10.2.2 tensile strength 24 h at STD. COND. 15 psi (103 kPa) min
10.2.2 tensile strength 14 days at RT 25 psi (172 kPa) min
10.2.2 tensile strength 14 days at STD. COND. 25 psi (172 kPa) min
Adhesive open-time determination 10.3 open time 24hatRT 75 % paper transfer, min
Adhesive open-time determination 10.3 open time 24 h at STD. COND. 75 % paper transfer, min
Substrate wet-out by adhesive
1. Plywood 10.4.1 wet out spatula applied good wetting property
2. Wallboard 10.4.2 wet out spatula applied good wetting property
Adhesive aging 10.5 accelerated aging 500 h at 158°F no cracking or chipping
Adhesive aging 10.5 accelerated aging 500 h at 158°F (70°C) no cracking or chipping
Freeze thaw stability † 10.6 low temperature storage 3 cycles of no change in workability; 10 psi
24hat0°F+24hatRT (69 kPa) shear strength, min
Freeze thaw stability † 10.6 low temperature storage 3 cycles of 24 h at 0°F + 24 h at no change in workability; 10 psi
STD. COND. (69 kPa) shear strength, min
Suitability of a laminating adhesive 10.7 compatibility 24 h at 100°F no blistering, vinyl-film
for vinyl-covered wallboard discoloration, or bond failure
Suitability of a laminating adhesive 10.7 compatibility 24 h at 100°F (38°C) no blistering, vinyl-film
for vinyl-covered wallboard discoloration, or bond failure
Suitability for Stain Resistance for 10.8 staining 1hatRT no swelling or discoloration
Vinyl-covered wallboard
Suitability for Stain Resistance for 10.8 staining 1 h at STD. COND. no swelling or discoloration
Vinyl-covered wallboard
Bridging 10.9 gap-filling 48hatRT intact adhesive bond line, report
length and paper failure %
Bridging 10.9 gap-filling 48 h at STD. COND. intact adhesive bond line, report
length and paper failure %
† Corrected editorially.
´1
D6464 – 03a (2009)
D6464–03a
FIG. 1 Tensile Strength Test Specimen Assembly
(18.3-mm)- thick U.S. Product Standard PS-1-95 grade marked stamped, commercial plywood, Exterior, Group 1 Species,A-Aor
A-B grade face and back veneers.
7.8 Manila Folder—Plain manila paper, 11 point weight, (0.011-in. (0.28-mm) thick).
7.9 Vinyl-Covered Wallboard—A manufactured product consisting of gypsum wallboard with 2 mil minimum thickness vinyl
overlay bonded to the wallboard front face.
7.10 1-Pt and 1-Gal Non-Reactive Metal Can.
7.11 Food Wrap Polyethylene Film—0.8 mil thickness sheet.
7.12 Steel Mandrel—1.0—1 in. (25.4 mm) diameter steel rod or pipe section with smooth and uniform surface.
7.13 Tension Rod—A steel rod for connecting the tensile test specimen assembly to the test machine.
7.14 Testing Machine—Any suitable testing machine that is capable of operation at a constant rate of motion of the moveable
head and has an accuracy of 61 % when calibrated in accordance with Practices E4 requirements.
7.15 Compression Shear Test Fixture—A compression-shear apparatus that is similar to, but of a larger scale than the fixture
recommended in Test Method D905. A similar fixture is shown in Fig. 2.
1 3
7.16 Wood Screw with Eyelet—#6by1 ⁄2 in. (38.1 mm) long, ⁄8 in. (19.5 mm) inside diameter eyelet.
7.17 Scaffolding Nails—6d, double-head, smooth shaft, 0.113–-in. (2.870-mm) diameter 2 in. (51 mm) long.
8. Sampling
8.1 The test adhesive sample size of 1 qt (approximately
1 L) is a minimum amount to complete one full series of testing. The sample is to be handled and stored according to the
FIG. 2 Shear Strength Test Specimen Assembly
´1
D6464 – 03a (2009)
D6464–03a
manufacturers recommendations. The sample is to be representative of the final product for which recognition is sought.
9. Conditioning of Materials and Adhesives
9.1 Standard condition will be defined as being 73 6 2°F (23 6 1°C) and 50 6 5 % relative humidity.
9.2 ConditiontheDouglas-firlumber,plywood,gypsumwallboard,andplainmanilafilefolderfor48hasdescribedin9.1.(The
Douglas-fir lumber and plywood should not vary by 0.5 % after consecutive weighings.)
10. Test Methods
10.1 Shear Strength (Rate-of-Shear Strength Development):
10.1.1 Preparation of Wallboard-Plywood Laminates—The gypsum wallboard must be reinforced with plywood. The plywood
reinforcedgypsumwallboardisreferredtoasthewallboard-plywoodlaminate.Eachlaminateismadebybondingthefrontsurface
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ofapieceof4by3 ⁄2by ⁄2in.(101.6by88.9by12.7mm)thickwallboardtoa ⁄4 or ⁄32in.(19.0(19or18.3mm)thickplywood
piece of the same dimensions with a commercially available adhesive. The grain of the wallboard back surface facing paper shall
run parallel with the 3 ⁄2 in. (89.0)(89 mm) direction. Cure the adhesive in accordance with the adhesive manufacturer’s
recommendations. Condition the wallboard-plywood laminate to a constant weight in accordance with 9.2.
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10.1.2 Preparation of Test Assembly—Prepare the test assembly by bondinga4by3 ⁄2 by ⁄4 or ⁄32 in. (102.0(102 by 89.089
by 19.019 mm) piece of plywood (7.3) to the previously prepared laminate as follows and shown in Fig. 3.
10.1.2.1 Sand the face of the ⁄4-in. (19.0-mm)(19-mm) thick plywood smooth with garnet paper and wipe the sanded surface
free of dust. Drill two pilot holes through the wallboard-plywood laminate. Use a standard 0.125 in. (3.175 mm) drill bit and locate
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each pilot hole at ⁄8-in. (9.5 mm) from the sides and ⁄8-in. (22.2 mm)(22-mm) from the overlapped end.
10.1.2.2 Apply the adhesive on the sanded surface with the self-contained delivery system set at the manufacturer’s
recommended bead size. The amount of adhesive should be sufficient to cover the entire bond area without gaps in the adhesive.
10.1.2.3 Allow an open time of 30 6 5 s upon completion of spreading.
10.1.2.4Squarely10.1.2.4 Squarely position the wallboard-plywood laminate on the coated plywood overlapping exactly 2 ⁄2 6
⁄16 in.
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(63.5 mm), thus forming the approximate 10 in. (64.5 cm ) bonded area (see Fig. 3).
10.1.2.5Insertfour10.1.2.5 Insertsixwirespacers(No.20gage)atleast2in.(51.0-mm)(51mm)longintotheadhesivebondline
joint. Position the spacers so that they are at each end of the test region. With the test specimen positioned horizontally on a firm
surface and the wallboard plywood laminate piece on top, install two 6d scaffolding nails into the predrilled pilot holes.
NOTE 2—The pilot hole diameter should be slightly larger than the nail diameter. This is necessary to prevent the laminate from binding against the
nail shaft and interfering with the uniform compression at the bond line. 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 scaffolding nails. Remove the spacers and cut away the excess adhesive
from the bonded edges. Do not disturb the alignment of the bond line.
10.1.3 Shear Strength—Dynamic Loading Determination—Following the appropriate conditioning, test the specimen in shear
using a compression-shear test fixture as shown in Fig. 2. The bottom edge of the wallboard-plywood laminate shall rest on a
self-aligning seat as the test loading is simultaneously applied to the top edge of the plywood. The stress applied must be 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 strength at a cross head speed of 0.2 in
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