ASTM D6325-98

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 6325 – 98
Test Method for
Determining Open Assembly Time of Carpet Mastic
Adhesives
This standard is issued under the fixed designation D 6325; 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 4.2 The test method provides a means of measuring the
open assembly time for an adhesive. Use of such a test method
1.1 This test method describes a procedure to measure open
can aid both the manufacturer to develop and the user to select
assembly time for a troweled carpet adhesive.
the appropriate adhesive for the installation of carpet.
1.2 This test method provides an evaluation of the ability of
4.3 Test Method C 679 was used as a model for this test
an adhesive to effectively wet out the intended carpet backing.
method.
1.3 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
5. Apparatus
information only.
1 1
5.1 Applicator Trowel— ⁄8 in. (3.2 mm) wide, ⁄8in. (3.2
1.4 This standard does not purport to address all of the
mm) deep, ⁄16 in. (1.6 mm) space V-notch.
safety concerns, if any, associated with its use. It is the
5.2 One-kg Weight, at least 2 in. (51 mm) in diameter.
responsibility of the user of this standard to establish appro-
5.3 Chronometer.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
6. Materials
2. Referenced Documents 6.1 Adhesive—Any appropriate adhesive used to install
carpet.
2.1 ASTM Standards:
6.2 Polyethylene—Low density (LDPE) with a 0.006 in.
C 679 Test Method for Tack-Free Time of Elastomeric
2 (0.15 mm) thickness.
Sealants
6.3 Glass, 12 in. by 12 in.
D 618 Practice for Conditioning Plastics for Testing
D 907 Terminology of Adhesives
7. Conditioning
7.1 Condition the LDPE, glass, and adhesive to be tested 24
3. Terminology
h prior to testing at 73.4 6 3.6°F (23 6 2°C) and 50 6 5%
3.1 Definitions:
relative humidity according to Practice D 618.
3.1.1 Many of the terms in this test method are defined in
Terminology D 907.
8. Sample Preparation
8.1 Cut the LDPE into twenty 2 in. (50.8 mm) by 2 in. (50.8
4. Significance and Use
mm) pieces.
4.1 The ability to have a sufficient open assembly time is
critical when bonding a carpet. An adhesive with too short an
9. Procedure
open assembly time will not allow the installer enough time to
9.1 Hold the trowel at a 45° angle and spread enough
position the carpet before the adhesive is dried beyond use. A
adhesive to cover the entire glass surface. Start the c
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