ASTM D3201-08ae1
(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 inch-pound values given in parentheses are for information only and are not considered standard.
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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´1
Designation: D3201 − 08a
StandardTest Method for
Hygroscopic Properties of Fire-Retardant Wood and Wood-
1
Based Products
This standard is issued under the fixed designation D3201; 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
´ NOTE—Note 2 was editorially added in October 2009.
1. Scope 4. Significance and Use
1.1 This test method prescribes the procedure for determin- 4.1 The hygroscopic properties of wood and wood-based
ing the moisture content of fire-retardant-treated wood and products treated with fire-retardant chemicals are often greater
wood-based product samples after exposure to a standard high than for untreated products. This is particularly true at the
relative humidity condition of 92 6 2 % at 27 6 2°C higherrelativehumidityconditions.Thishigherhygroscopicity
(81 6 4°F). sometimesisthecauseforstaining,decay,poorpaintadhesion,
and migration and exuding of chemicals and moisture at the
1.2 The text of this test method references notes and
high humidities. Corrosion of metal fasteners sometimes also
footnotes which provide explanatory material. These notes and
occurs.
footnotes (excluding those in tables and figures) shall not be
considered as requirements of this test method. 4.2 The results obtained with this standard are important in
identifying treatments with low hygroscopic properties.
1.3 The values stated in SI units are to be regarded as the
standard. The inch-pound values given in parentheses are for
4.3 Results can be useful in determining exposure limita-
information only and are not considered standard.
tions in service for specific treated products.
1.4 This standard does not purport to address all of the
4.4 Building codes and other specifications for fire-
safety concerns, if any, associated with its use. It is the
retardant-treated wood for interior use include requirements
responsibility of the user of this standard to establish appro-
based on this test method.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
5.1 Conditioning chamber with air circulation and capable
2. Referenced Documents
of being maintained at 27 6 2°C (81 6 4°F) and a relative
2
humidity of 92 62%.
2.1 ASTM Standards:
D9 Terminology Relating to Wood and Wood-Based Prod-
5.2 Oven, air-circulated and vented, capable of maintaining
ucts
a temperature of 103 6 2°C (217 6 4°F).
E176 Terminology of Fire Standards
5.3 Weighing Scale—A scale or balance that will weigh a
specimen within an accuracy of 60.2 %.
3. Terminology
3.1 Definitions—Definitions used in this practice are in
6. Test Specimens
accordance with Terminologies D9 and E176.
6.1 A minimum of five specimens shall be selected that
represent the lot. Unless otherwise specified, specimens shall
be full cross sections, no less than 25.4 mm (1 in.) along the
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood
grain, but longer as needed to provide a minimum volume of
and is the direct responsibility of Subcommittee D07.07 on Fire Performance of
3 3
33 000 mm (2 in. ).
Wood.
Current edition approved Nov. 1, 2008. Published December 2008. Originally
6.2 The specimens shall be penetrated by the fire-retardant
approved in 1973. Last previous edition approved in 2008 as D3201 – 08. DOI:
10.1520/D3201-08AE01. chemical to be representative for the treated product.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—The use of untreated specimens as control specimens is
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 recommended to provide verification of the high-humidity conditions
the ASTM website. used.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
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D3201 − 08a
7. Procedure
m = ovendry weight of specimen after high-humidity
od
exposure.
7.1 All measurements of the specimen weight shall be to an
accuracy of 60.2 %.
8.2 Calculate the moisture content of each specimen after
high-humidity exposure (u ) as follows:
7.2 The specimens shall be in moisture equilibrium with a f
laboratoryambientconditionof30to65%relativehumidityor
m 2 m
f od
u,% 5 3100 (2)
f
shall be exposed for at least 7 days at such a condition prior to
m~od!
high-humidity exposure.
where:
7.3 If the specimens will support fungal or mold growth
m = weight of the specimen after high-humidity exposure,
f
during the high humidity exposure, then
...
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.
´1
Designation:D 3201–08a Designation:D3201–08a
Standard Test Method for
Hygroscopic Properties of Fire-Retardant Wood and Wood-
1
Based Products
This standard is issued under the fixed designation D3201; 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
´ NOTE—Note 2 was editorially added in October 2009.
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 inch-pound values given in parentheses are for
information only and are not considered standard.
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:
D9 Terminology Relating to Wood and Wood-Based Products
E176 Terminology of Fire Standards
3. Terminology
3.1 Definitions—Definitions used in this practice are in accordance with Terminologies D 9D9 and E 176and E176.
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 chamber with air circulation and capable of being maintained at 27 6 2°C (81 6 4°F) and a relative humidity
of 92 62%.
5.2 Oven, air-circulated and vented, capable of maintaining a temperature of 103 6 2°C (217 6 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
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 Nov. 1, 2008. Published December 2008. Originally approved in 1973. Last previous edition approved in 2008 as D3201 – 08. DOI:
10.1520/D3201-08AE01.
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 ----------------------
´1
D3201–08a
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.
NOTE 1—The use of untreated specimens as control specimens is recommended to provide verification of the high-humidity conditions used.
7. Procedure
7.1 All measurements of the specimen weight shall be to an accuracy of 60.2 %.
7.2 The specimens shall be in moisture equilibrium with a laboratory ambient condition of 30 to 65 % relative humidity or shall
be exposed for at least 7 days at such a condition prior to high-humidity exposure.
7.3 If the specimens will support fun
...
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