ASTM D2921-98(2005)
(Test Method)Standard Test Method for Qualitative Tests for the Presence of Water Repellents and Preservatives in Wood Products
Standard Test Method for Qualitative Tests for the Presence of Water Repellents and Preservatives in Wood Products
SIGNIFICANCE AND USE
Although chlorinated phenol-treated wood has become less common due to environmental concerns, repellent-treated wood is commonly specified in construction. This test method provides a means to verify the presence of a significant level of water repellent protection.
SCOPE
1.1 This test method covers simple qualitative field or laboratory tests to determine water repellency or the presence of chlorinated phenol preservative chemicals in wood products that are specified to be water repellent preservative treated.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Standards Content (Sample)
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Designation:D2921–98(Reapproved2005)
Standard Test Method for
Qualitative Tests for the Presence of Water Repellents and
Preservatives in Wood Products
This standard is issued under the fixed designation D2921; 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 4.3 Copper Wire Coil Specimen Holder (or Other Suitable
Copper Holder)—A suitable copper wire coil can be made by
1.1 This test method covers simple qualitative field or
using a lead pencil as a mandrel to form a helix using copper
laboratory tests to determine water repellency or the presence
1 3
wire of about 1.6 to 2.4 mm ( ⁄16 to ⁄32 in.) in diameter. Leave
of chlorinated phenol preservative chemicals in wood prod-
aspaceofapproximatelythediameterofthewirebetweeneach
uctsthatarespecifiedtobewaterrepellentpreservativetreated.
loop. The helix should be 19 to 25 mm ( ⁄4 to 1 in.) in length.
1.2 The values stated in SI units are to be regarded as
Leave a pigtail of about 152 mm (6 in.) of wire at one end of
standard. The values given in parentheses are for information
the helix and form a loop of approximately 25 mm (1 in.) in
only.
diameter to be used as a holder for the coil.
1.3 This standard does not purport to address all of the
4.4 Sharp Knife.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Water Repellent Test
priate safety and health practices and determine the applica-
5.1 Place uncut wood items to be tested so that the end grain
bility of regulatory limitations prior to use.
is exposed as a horizontal surface. If the end grain cannot be so
2. Referenced Documents positioned, comparisons can be made on the flat grain but with
less definitive results.
2.1 U.S. Federal Specification:
5.2 With an eye dropper, or similar device, allow several
TT-W-572 Wood Preservative Water-Repellant
drops of water to fall from about 13 mm ( ⁄2 in.) on the end
2.2 NIST Standard:
grain of the wood. Wait 5 min and then observe the degree of
262-63 Water Repellent Preservative Non-Pressure Treat-
4 penetration. With flat grain or vertical grain surfaces, waiting
ment for Mill Work
periods of 10 to 15 min may be necessary.
3. Significance and Use 5.3 Water drops that immediately flatten out, penetrate and
darken the wood, indicate that the wood has not been treated
3.1 Although chlorinated phenol-treated wood has become
with a water repellent.
less common due to environmental concerns, repellent-treated
5.4 Water drops that “bead-up” and remain as spheres, with
wood is commonly specified in construction. This test method
little or no color change or penetration, indicate that the wood
provides a means to verify the presence of a significant level of
has been treated with a water repellent. Water repellent
water repellent protection.
preservatives, meeting Fed. Spec. TT-W-572 and NBS Stan-
4. Apparatus
dard 262-63, impart sufficient water repellency to the end grain
of wood to cause water drops to bead up and form spheres.
4.1 Eyedropper, plastic squeeze bottle or similar means for
metering drops of water.
6. Preservative Test
4.2 Flame Source, such as bunsen burner, butane torch, or
6.1 Chlorinated phenol based wood preservatives emit a
alcohol burner.
characteristic green flame upon pyrolysis within a ventilated
copper envelope due to the release of chlorine and its conse-
This test method is under the jurisdiction of ASTM Committee D01 on Paint
quent reaction with copper (Beilstein’s test). Untreated wood
and Related Coatings, Materials, andApplications and is the direct responsibility of
produces a yellow-orange flame but any chlorine containing
Subcommi
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