Реферат

This specification establishes the performance levels for adhesives to be used in finger joints in nonstructural bonded-lumber products. Such products include, but are not limited to, interior and exterior mouldings, window and door components or parts, and bonded-lumber panels. The apparatus shall consist of environmental chamber for moist-heat aging, oven with sufficient air circulation to remove moisture from the chamber, tanks for soaking and boiling, testing machines for the flexure and tension specimens, and vacuum-pressure vessel. Tests shall be conducted such as dry, soak, elevated-temperature, and temperature-humidity tests for dry-use classification and dry, boil, elevated-temperature, and vacuum-pressure tests for the wet-use classification. The adhesives shall be tested for performance which shall meet the following requirements: moisture content; specific gravities of wood species; tensile strength; wood failure for soft and hard woods; and rupture modulus.

Область применения

1.1 This specification establishes performance levels for adhesives to be used in finger joints in nonstructural bonded-lumber products. Such products include, but are not limited to, interior and exterior mouldings, window and door components or parts, and bonded-lumber panels. Adhesives that meet the requirements of the various performance classes are considered capable of providing an adequate bond for use under the conditions described for the class. This specification is to be used to evaluate adhesives as well as the adhesive bonds in the finger joints. See Section , Significance and Use, for limitations when using this specification to evaluate industrially manufactured finger joints. Note 1This specification supersedes the finger-joint portion of the 1990 edition of Specification D 3110.

1.2 The following index is provided as a guide to the test methods in this specification:

SectionApparatusEquipment, Material, and Preparation of Assemblies and SpecimensConditioning for Factory-Manufactured Assemblies, Laboratory-Made Assemblies, and Test SpecimensTesting in FlexureTesting in TensionExposure Conditions and Treatments1.Dry Use Tests: Dry, 3-cycle Soak, Elevated Temperature, and Temperature-Humidity2.Wet Use Tests: Dry, Boil, Elevated Temperature, and Vacuum-PressureNote 2

The conditioning needed for various stages in the preparation of both types of specimens and for the exposure tests are given.

Note 3

Specific guidelines for specimen size, exposure conditions, testing, calculation, and reporting are given for flexure specimens in Sections and , and for tension specimens in Sections and .

1.3 For the definitions of dry useand wet use, see and .

1.4 The values stated in inch-pound units are to be regarded as standard. The SI units given in parentheses are for information only.

The following precautionary caveat pertains only to the apparatus and test methods portions, Sections of this specification: 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.