ASTM D6325-98(2011)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6325 − 98 (Reapproved 2011)
Standard Test Method for
Determining Open Assembly Time of Carpet Mastic
Adhesives
This standard is issued under the fixed designation D6325; 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.
1. Scope product with too long an open assembly time will not provide
enoughdrytimeforthecarpettobondtotheintendedsubstrate
1.1 This test method describes a procedure to measure open
without movement of the carpet.
assembly time for a troweled carpet adhesive.
4.2 The test method provides a means of measuring the
1.2 This test method provides an evaluation of the ability of
open assembly time for an adhesive. Use of such a test method
an adhesive to effectively wet out the intended carpet backing.
can aid both the manufacturer to develop and the user to select
1.3 The values stated in inch-pound units are to be regarded
the appropriate adhesive for the installation of carpet.
as standard. The values given in parentheses are mathematical
4.3 Test Method C679 was used as a model for this test
conversions to SI units that are provided for information only
method.
and are not considered standard.
1.4 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
1 1
5.1 Applicator Trowel— ⁄8 in. (3.2 mm) wide, ⁄8 in. (3.2
responsibility of the user of this standard to establish appro-
mm) deep, ⁄16 in. (1.6 mm) space V-notch.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5.2 One-kg Weight, at least 2 in. (51 mm) in diameter.
5.3 Chronometer.
2. Referenced Documents
2.1 ASTM Standards:
6. Materials
C679 Test Method for Tack-Free Time of Elastomeric Seal-
6.1 Adhesive—Any appropriate adhesive used to install
ants
carpet.
D618 Practice for Conditioning Plastics for Testing
6.2 Polyethylene—Low density (LDPE) with a 0.006 in.
D907 Terminology of Adhesives
(0.15 mm) thickness.
3. Terminology
6.3 Glass, 12 in. by 12 in.
3.1 Definitions:
3.1.1 Many of the terms in this test method are defined in 7. Conditioning
Terminology D907.
7.1 Condition the LDPE, glass, and adhesive to be tested 24
h prior to testing at 73.4 6 3.6°F (23 6 2°C) and 50 65%
4. Significance and Use
relative humidity according to Practice D618.
4.1 The ability to have a sufficient open assembly time is
critical when bonding a carpet. An adhesive with too short an
8. Sample Preparation
open assembly time will not allow the installer enough time to
8.1 Cut the LDPE into twenty 2 in. (50.8 mm) by 2 in. (50.8
position the carpet before the adhesive is dried beyond use. A
mm) pieces.
This test method is under the jurisdiction of ASTM Committee D14 on 9. Procedure
Adhesives and is the direct responsibility of Subcommittee D14.70 on Construction
9.1 Hold the trowel at a 45° angle and spread enough
Adhesives.
Current edition approve
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