Standard Test Method for
Determining Strength of Gap-Filling Adhesive Bonds in
Shear by Compression Loading1

This standard is issued under the fixed designation D 3931; 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

1.1 This test method covers the determination of comparative shear properties of gap-filling adhesives in wood-to-wood
joints at specified thicknesses of bondline in the dry condition,
when tested on standard specimens under specified conditions
of preparation, conditioning, and loading in compression. This
test method is intended as an evaluation of gap-filling adhesives such as those used to bond plywood to lumber, lumber to
lumber, and other similar materials in building constructions.

1.2 This test method also may be used to determine shear
properties of gap-filling adhesives in species of wood and in
thicknesses of bondline other than those specified for the
comparative tests of shear properties within this test method.
All procedures specified herein are applicable, excepting requirements for wood species and specific gravity, and thicknesses of bondlines.

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:
D 143 Methods of Testing Small Clear Specimens of Timber2
D 905 Test Method for Strength Properties of Adhesive
Bonds in Shear by Compression Loading3
D 1151 Test Method for Effect of Moisture and Temperature
on Adhesive Bonds3
E 171 Specification for Standard Atmospheres for Conditioning and Testing Materials4

3. Terminology

3.1 Definitions:

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