ASTM D3201-08
(Test Method)Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Based Products
Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Based Products
SIGNIFICANCE AND USE
The hygroscopic properties of wood and wood-based products treated with fire-retardant chemicals are often greater than for untreated products. This is particularly true at the higher relative humidity conditions. This higher hygroscopicity sometimes is the cause for staining, decay, poor paint adhesion, and migration and exuding of chemicals and moisture at the high humidities. Corrosion of metal fasteners sometimes also occurs.
The results obtained with this standard are important in identifying treatments with low hygroscopic properties.
Results can be useful in determining exposure limitations in service for specific treated products.
Building codes and other specifications for fire-retardant-treated wood for interior use include requirements based on this test method.
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 92 ± 2 % at 27 ± 2°C (81 ± 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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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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Designation:D3201–08
Standard Test Method for
Hygroscopic Properties of Fire-Retardant Wood and Wood-
1
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope than for untreated products. This is particularly true at the
higherrelativehumidityconditions.Thishigherhygroscopicity
1.1 This test method prescribes the procedure for determin-
sometimesisthecauseforstaining,decay,poorpaintadhesion,
ing the moisture content of fire-retardant-treated wood and
and migration and exuding of chemicals and moisture at the
wood–based product samples after exposure to a standard high
high humidities. Corrosion of metal fasteners sometimes also
relative humidity condition of 92 6 2 % at 27 6 2°C (81 6
occurs.
4°F).
4.2 The results obtained with this standard are important in
1.2 The text of this test method references notes and
identifying treatments with low hygroscopic properties.
footnotes which provide explanatory material. These notes and
4.3 Results can be useful in determining exposure limita-
footnotes (excluding those in tables and figures) shall not be
tions in service for specific treated products.
considered as requirements of this test method.
4.4 Building codes and other specifications for fire-
1.3 The values stated in SI units are to be regarded as the
retardant-treated wood for interior use include requirements
standard. The values given in parentheses are for information
based on this test method.
only.
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
5.1 Conditioning chamber with air circulation and capable
responsibility of the user of this standard to establish appro-
of being maintained at 27 6 2°C (81 6 4°F) and a relative
priate safety and health practices and determine the applica-
humidity of 92 62%.
bility of regulatory limitations prior to use.
5.2 Oven, air-circulated and vented, capable of maintaining
2. Referenced Documents a temperature of 103 6 2°C (2176 4°F).
2
5.3 Weighing Scale—A scale or balance that will weigh a
2.1 ASTM Standards:
specimen within an accuracy of 60.2 %.
D9 Terminology Relating to Wood and Wood-Based Prod-
ucts
6. Test Specimens
E 176 Terminology of Fire Standards
6.1 A minimum of five specimens shall be selected that
3. Terminology represent the lot. Unless otherwise specified, specimens shall
be full cross sections, no less than 25.4 mm (1 in.) along the
3.1 Definitions—Definitions used in this practice are in
grain, but longer as needed to provide a minimum volume of
accordance with TerminologiesD9 and E 176.
3 3
33 000 mm (2 in. ).
4. Significance and Use
6.2 The specimens shall be penetrated by the fire-retardant
chemical to be representative for the treated product.
4.1 The hygroscopic properties of wood and wood-based
products treated with fire-retardant chemicals are often greater
NOTE 1—The use of untreated control specimens is highly recom-
mended not only to supply useful data on the relative influence of
treatments, but also to provide relative information on the high-humidity
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood
conditions used.
and is the direct responsibility of Subcommittee D07.07 on Fire Performance of
Wood.
7. Procedure
Current edition approved Feb. 1, 2008. Published February 2008. Originally
approved in 1973. Last previous edition approved in 2007 as D 3201 – 07.
7.1 All measurements of the specimen weight shall be to an
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
accuracy of 60.2 %.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D3201–08
7.2 The specimens shall be in moisture equilibrium with a
m = weight of the specimen after high-humidity expo-
f
laboratoryambientconditionof30to65%relativehumidityor
sure, and
shall be exposed for at least 7 days at such a condition prior to
m = ovendry weight of specimen after high-humidity
od
high-humidity exposure.
exposure.
7.3 If the specimens will support fungal or mold growth 8.3 When data are available for untreated specimens ex-
during the high humidity exposure, then the specimens shall be posed under identical conditions of high-humidity exposure,
sprayed with a suitable biocide just prior t
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D3201–07 Designation:D3201–08
Standard Test Method for
Hygroscopic Properties of Fire-Retardant Wood and Wood-
1
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 (e) indicates an editorial change since the last revision or reapproval.
1. 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 92 6 2 % at 27 6 2°C (81 6 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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 9 Terminology Relating to Wood and Wood-Based Products
E 176 Terminology of Fire Standards
3. Terminology
3.1 Definitions— Definitions used in this practice are in accordance with Terminologies D 9 and E 176.
4. Significance and Use
4.1 The hygroscopic properties of wood and wood-based products treated with fire-retardant chemicals are often greater than
for untreated products. This is particularly true at the higher relative humidity conditions. This higher hygroscopicity sometimes
is the cause for staining, decay, poor paint adhesion, and migration and exuding of chemicals and moisture at the high humidities.
Corrosion of metal fasteners sometimes also occurs.
4.2 The results obtained with this standard are important in identifying treatments with low hygroscopic properties.
4.3 Results can be useful in determining exposure limitations in service for specific treated products.
4.4 Building codes and other specifications for fire-retardant-treated wood for interior use include requirements based on this
test method.
5. Apparatus
5.1 Conditioning chamberwithaircirculationandcapableofbeingmaintainedat27 62°C(81 64°F)andarelativehumidity
of 92 62%.
5.2 Oven, air-circulated and vented, capable of maintaining a temperature of 103 6 2°C (2176 4°F).
5.3 Weighing Scale—A scale or balance that will weigh a specimen within an accuracy of 60.2 %.
6. Test Specimens
6.1 A minimum of five specimens shall be selected that represent the lot. Unless otherwise specified, specimens shall be full
3
cross sections, no less than 25.4 mm (1 in.) along the grain, but longer as needed to provide a minimum volume of 33 000 mm (2
3
in. ).
6.2 The specimens shall be penetrated by the fire-retardant chemical to be representative for the treated product.
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.07 on Fire Performance of Wood.
Current edition approved April 15, 2007. Published May 2007. Originally approved in 1973. Last previous edition approved in 2003 as D3201–94(2003).
Current edition approved Feb. 1, 2008. Published February 2008. Originally approved in 1973. Last previous edition approved in 2007 as D 3201 – 07.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D3201–08
6.3Untreated specimens, when available, of the same species or wood-based product and of the same size, shall be exposed to
the preconditioning, high-humidity exposure, and drying along with the treated specimens.
NOTE 1—The use of untreated control specimens is highly recommended not only to supply useful data on the relative influence of treatments, but also
to provide relative information on the high-humidity conditions used.
7. Procedure
7.1 All measurements of the specimen weig
...
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