ASTM D3434-00

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3434–00
Standard Test Method for
Multiple-Cycle Accelerated Aging Test (Automatic Boil Test)
for Exterior Wet Use Wood Adhesives
This standard is issued under the fixed designation D 3434; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers a procedure for testing the 3.1 Definitions—Definitions of terms in this test method
durability of wood adhesives that may be suitable for exterior may be found in Terminology D 907.
(wet use) exposure conditions. The possible use of adhesives
4. Summary of Test Method
suitable for evaluation includes, but is not limited to those used
for laminating large members, manufacturing plywood, or 4.1 The lumber is selected, adhesive obtained, and test
specimens prepared.
fabricating wood joints such as finger or scarf joints. This
,
2 3
practice is not suitable for interior type glues. 4.2 The specimens are subjected to the required number of
boil/dry cycles.
1.2 The test does not evaluate for any biological effects.
1.3 The test subjects specimens to a large number of 4.3 The specimens are withdrawn from the test at the
required periodic intervals.
alternate boil/dry cycles.
1.4 The values stated in SI units are to be regarded as the 4.4 The designated number of specimens are tested in
tensile shear at the end of the specified number of boil/dry
standard. The inch-pound units in parentheses are provided for
information only. cycles.
4.5 Plotshearstrength,kPa(psi),orpercentofwoodfailure,
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the or both, versus the number of boil/dry cycles to which the
specimens have been subjected.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.6 Thegraphiscomparedforthetestadhesives.Becauseof
the variables occurring in wood, a known performance adhe-
bility of regulatory limitations prior to use.
sive control should be run for each test set being evaluated.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 This test method is intended to differentiate between the
D 906 Test Method for Strength Properties of Adhesives in
Plywood Type Construction in Shear by Tension Loading exterior durability of two or more adhesives.At present, this is
done by comparing the adhesives as described in 4.5 and 4.6
D 907 Terminology of Adhesives
D 2339 TestMethodforStrengthPropertiesofAdhesivesin rather than by assigning absolute numerical values for dura-
bility performance.
Two-PlyWood Construction in Shear byTension Loading
D 4442 TestMethodsforDirectMoistureContentMeasure- 5.2 The test method as described is for comparing potential
long-term durability rather than for use as a quality control
ment of Wood and Wood Based Materials
E 122 Practice for Choice of Sample Size to Estimate a procedure. This makes it suitable for research, adhesive evalu-
ation, process evaluation, and product design. A modification
Measure of Quality for a Lot or Process
couldbemade,thatis,shortenthenumberofcyclesusedsothe
test method would be suitable for quality control in production
This test method is under the jurisdiction of ASTM Committee D-14 on
mills.Theresultsobtainedforaparticularadhesivecanbeused
Adhesives, and is the direct responsibility of Subcommittee D14.30 on Wood
toshowhowmanycyclesarerequiredforamillqualitycontrol
Adhesives.
test of that adhesive.
Current edition approved March 10, 2000. Published May 2000. Originally
published as D 3434 – 75. Last previous edition D 3434 – 96.
5.3 The test method assumes that boil/dry cycling is an
Walser and Colbeck, “Bond-Degrade Accelerating Machine Helps Predict
adequate and useful accelerated aging technique. Evaluation of
Bond Life,” Adhesives Age, Vol 10(11), November 1967, pp. 33–35.
3 long-term durability of adhesives in wood joints under severe
Kreibich and Freeman, “Development and Design of an Accelerated Boil
service conditions, including extended exterior exposure, is a
Machine,” Forest Products Journal, Vol 18, No. 12, December 1968.
Annual Book of ASTM Standards, Vol 15.06.
complex field, and no entirely reliable short-term test is known
Annual Book of ASTM Standards, Vol 04.10.
to ensure that a new type of adhesive system will satisfactorily
Annual Book of ASTM Standards, Vol 14.02.
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D3434
resistallofthechemical,moisture,microorganism,andsolvent Typical surfaces include sawed, planed, sanded, and skived.
effects that such severe service may involve. Except for effects Detailed surface preparation procedures used must be included
of microorganisms and other similar biological influences, this
in the report (see 10.1).
test method has proven very useful for comparison purposes to
7.1.1.1 Specimen moisture content (MC) conditions called
distinguish between adhesive systems of different degree of
for in this test method should be checked in accordance with
durability to the usual temperature, moisture, and cyclic
Test Methods D 4442.
moisture conditions. It has proven very useful to distinguish
7.1.2 For Plywood Adhesives—Prepare the test specimen in
between bondlines, made with adhesives of proven chemical
accordance with Test Method D 906.
and biological durability, that were properly used in production
7.1.3 Miscellaneous Specimens—Otherwoodjoints,suchas
to resist the mechanical and moisture effects that such joints
finger or scarf joints, or other wood-based materials, such as
must withstand in severe service over extended periods of
particleboard, hardboard, or insulating board, may also be
exposure. It does not, in itself, assure that new types of
evaluated.
adhesives will always withstand actual exterior or other severe
7.2 Adhesive—Store the adhesive or its components at the
service.
manufacturer’s recommended conditions.
6. Apparatus
7.3 Bonding Procedure:
6.1 Due to the large number of boil/dry cycles involved, an
7.3.1 It has been found convenient to fabricate large two-
automated piece of test equipment is required. A schematic
and three-ply blocks, which are subsequently cut into a number
diagram of one system found suitable is shown in Fig. 1; a
1 1
of test specimens.A140 by 140-mm (5 ⁄2 by 5 ⁄2-in) block will
photographinFig.2.Theequipmentshownautomaticallyboils 1
yield four specimens and one 140 by 200-mm (5 ⁄2by 8-in)
and dries the test specimens as required.
block will yield eight specimens.
6.2 Atensile shear tool is required such as described in Test
7.3.2 Mix and apply the adhesive(s) to the surface(s) to be
Method D 2339.
bonded in accordance with the manufacturer’s instructions. If
the processes are being evaluated, prepare specimens reflecting
...