Name: ASTM D3201-94(2003) - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products
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Abstract

Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products

SCOPE
1.1 This test method prescribes the procedure for determining the moisture content of fire-retardant-treated wood and wood-based product samples after exposure to a standard high relative humidity condition of 90 ± 3 % at 27 ± 2°C (80 ± 4°F).
1.2 The text of this test method references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this test method.
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.

General Information

Status

Historical

Publication Date

14-Apr-1994

ICS

79.040 - Wood, sawlogs and sawn timber

79.060.01 - Wood-based panels in general

Technical Committee

D07 - Wood

Drafting Committee

D07.07 - Fire Performance of Wood

Current Stage

Ref Project

Relations

Replaces

ASTM D3201-94(1998)e1 - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products

Effective Date

15-Apr-1994

Replaced By

ASTM D3201-07 - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Based Products

Effective Date

15-Apr-2007

Referred By

ASTM D5456-21e1 - Standard Specification for Evaluation of Structural Composite Lumber Products

Effective Date

15-Apr-1994

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ASTM D3201-94(2003) - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products

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ASTM D3201-94(2003) - Standard...

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation:D3201–94 (Reapproved 2003)
Standard Test Method for
Hygroscopic Properties of Fire-Retardant Wood and Wood-
Based Products
This standard is issued under the ﬁxed designation D 3201; 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 3. Apparatus
1.1 This test method prescribes the procedure for determin- 3.1 Conditioning Room or chamber with air circulation and
ing the moisture content of ﬁre-retardant-treated wood and controlling instruments capable of being maintained at 27 6
wood–based product samples after exposure to a standard high 2°C (80 6 4°F) and a relative humidity of 90 63%.
relative humidity condition of 906 3 % at 27 6 2°C (80 6
NOTE 1—Other suitable means of maintaining these conditions are also
4°F).
acceptable; for example, the use of saturated disodium phosphate
1.2 The text of this test method references notes and
(Na HPO ) or a barium chloride (BaCl ) solution in a closed container
4 2
footnotes which provide explanatory material. These notes and
with suitable solution agitation and air circulation at 27 6 2°C (80 6 4°F)
has been found satisfactory. It is desirable to install an air pump in the air
footnotes (excluding those in tables and ﬁgures) shall not be
space of the container and bubble air from this space through the saturated
considered as requirements of this test method.
solution.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.2 Oven, air-circulated and vented, capable of maintaining
a temperature of 103 6 2°C (2176 4°F).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.3 Weighing Scale—A scale or balance that will weigh a
specimen within an accuracy of 60.2 %.
bility of regulatory limitations prior to use.
NOTE 2—A torsion balance, Harvard trip balance, triple-beam balance,
2. Signiﬁcance and Use
andautomaticdirect-readingbalancesareexamplesofsuitableequipment.
2.1 The hygroscopic properties of wood and wood-based
products treated with ﬁre-retardant chemicals are often greater 4. Test Specimens
than for untreated products. This is particularly true at the
4.1 Specimens vary widely depending on the type of mate-
higherrelativehumidityconditions.Thishigherhygroscopicity
rial being analyzed. Specimens shall be selected that represent
may cause staining, decay, poor paint adhesion, and migration
the lot. Unless otherwise speciﬁed, specimens shall be full
and exuding of chemicals and moisture at the high humidities.
cross sections, no less than 25.4 mm (1 in.) along the grain, but
Corrosion of metal fasteners may also occur.
longer as needed to provide a minimum volume of 33 cm (2
2.2 The results obtained with this standard are important in
in. ).
determining the treatments with the lesser hygroscopic prop-
4.2 The specimens shall be penetrated by the chemical to be
erties.
representative for the treated product.
2.3 The results will be useful in determining exposure
4.3 The specimens shall be in moisture equilibrium with a
limitations in service for speciﬁc treated products.
laboratory ambient condition of 30 to 65 % relative humidity
2.4 Also, current leach-resistant, exterior-type, ﬁre-
or shall be exposed for at least 7 days at such a condition prior
retardant-treated wood and wood–based products have hygro-
to high-humidity exposure.
scopic properties at this exposure nearly equal to untreated
NOTE 3—If it is likely that the specimen will support fungal or mold
products. Therefore, the results from this standard may be
growth during the high humidity exposure, then the specimens should be
useful in determining if exterior or interior type treatments
sprayed with a suitable biocide just prior to the above exposure and
have been used.
allowed to air-dry for the seven days.
4.4 Untreated specimens, when available, of the same spe-
This test method is under the jurisdiction of ASTM Committee D07 on Wood cies or wood-based product and of the same size, shall be
and is the direct responsibility of Subcommittee D07.07 on Fire Performance of
exposed to the preconditioning, high-humidity exposure, and
Wood.
drying along with the treated specimens.
Current edition approved April 15, 1994. Published June 1994. Originally
published as D 3201 – 73T. Last previous edition D 3201 – 86.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Demo of StampPDF by Appligent, Inc. http://www.appligent.comDemo of StampPDF by Appligent, Inc. http://www.appligent.com

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
D3201–94 (2003)
NOTE 4—The use of untreated control specimens is highly recom-
moisture content of the specimens shall be calculated as the
...

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