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ASTM D2842-06

(Test Method)

Standard Test Method for Water Absorption of Rigid Cellular Plastics

Standard Test Method for Water Absorption of Rigid Cellular Plastics

SCOPE
1.1 This test method covers the determination of the water absorption of rigid cellular plastics by measuring the change in buoyant force resulting from immersion under a 5.1-cm (2-in.) head of water for the specified immersion period of 96 h.
1.2 This test method describes two procedures that shall be used to measure the change in buoyant force. Procedure A shall be used for materials that either experience rapid water absorption or that show an increase in volume during the exposure period, or both. Materials that do not exhibit either of these characteristics shall be evaluated by Procedure B.
1.3 For specific applications, immersion periods varying from the normal 96-h test requirement shall be agreed upon between the manufacturer and the purchaser.
1.4 The values stated in SI units are to be regarded as the standard.
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.
This test method is equivalent to ISO 2896.

General Information

Status
Historical
Publication Date
31-Oct-2006
ICS
83.100 - Cellular materials
Technical Committee
D20 - Plastics
Drafting Committee
D20.22 - Cellular Materials - Plastics and Elastomers
Current Stage
Ref Project

Relations

Replaces
ASTM D2842-01 - Standard Test Method for Water Absorption of Rigid Cellular Plastics
Effective Date
01-Nov-2006
Replaced By
ASTM D2842-12 - Standard Test Method for Water Absorption of Rigid Cellular Plastics
Effective Date
01-Oct-2012
Referred By
ASTM F561-19 - Standard Practice for Retrieval and Analysis of Medical Devices, and Associated Tissues and Fluids
Effective Date
01-Nov-2006
Referred By
ASTM D3576-20 - Standard Test Method for Cell Size of Rigid Cellular Plastics
Effective Date
01-Nov-2006
Referred By
ASTM E1974-19 - Standard Specification for Shelter, Electrical Equipment S-250/G
Effective Date
01-Nov-2006
Referred By
ASTM D7425/D7425M-13(2019) - Standard Specification for Spray Polyurethane Foam Used for Roofing Applications
Effective Date
01-Nov-2006
Referred By
ASTM D6226-21 - Standard Test Method for Open Cell Content of Rigid Cellular Plastics
Effective Date
01-Nov-2006
Referred By
ASTM E861-13(2021) - Standard Practice for Evaluating Thermal Insulation Materials for Use in Solar Collectors
Effective Date
01-Nov-2006
Referred By
ASTM C1696-20 - Standard Guide for Industrial Thermal Insulation Systems
Effective Date
01-Nov-2006
Referred By
ASTM E1975-22 - Standard Specification for Shelter, Electrical, Equipment S-280/G
Effective Date
01-Nov-2006
Referred By
ASTM C1029-20 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
Effective Date
01-Nov-2006

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ASTM D2842-06 - Standard Test Method for Water Absorption of Rigid Cellular PlasticsASTM D2842-06 - Standard Test Method for Water Absorption of Rigid Cellular Plastics
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ASTM D2842-06 - Standard Test Method for Water Absorption of Rigid Cellular Plastics
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2842 − 06
StandardTest Method for
1
Water Absorption of Rigid Cellular Plastics
This standard is issued under the fixed designation D2842; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2.2 ISO Standard:
ISO2896 Cellular Plastics, Rigid—Determination of Water
1.1 This test method covers the determination of the water
3
Absorption
absorptionofrigidcellularplasticsbymeasuringthechangein
buoyant force resulting from immersion under a 5.1-cm (2-in.)
3. Terminology
head of water for the specified immersion period of 96 h.
3.1 Definitions—There are no terms in this test method that
1.2 This test method describes two procedures that shall be
are new or other than dictionary definitions.
usedtomeasurethechangeinbuoyantforce.ProcedureAshall
4. Summary of Test Method
be used for materials that either experience rapid water
absorption or that show an increase in volume during the
4.1 The buoyant force of an object less dense than water is
exposureperiod,orboth.Materialsthatdonotexhibiteitherof
equal to the weight of water it displaces when submerged, less
these characteristics shall be evaluated by Procedure B.
the dry weight of the object. Water absorbed into the object
lowers the buoyant force by increasing the weight of the
1.3 For specific applications, immersion periods varying
sample. By knowing the volume and initial dry weight of the
from the normal 96-h test requirement shall be agreed upon
sample,theinitialbuoyantforcecanbecalculatedortheinitial
between the manufacturer and the purchaser.
buoyant force can be determined by direct measurement. The
1.4 The values stated in SI units are to be regarded as the
final buoyant force at the end of the immersion period is
standard.
measured with an underwater weighing assembly. The differ-
encebetweentheinitialandfinalbuoyantforceistheweightof
1.5 This standard does not purport to address all of the
the water absorbed per unit of specimen volume.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 Thepurposeofthistestmethodistoprovideameansfor
bility of regulatory limitations prior to use.
comparing relative water absorption tendencies between dif-
NOTE 1—This test method is equivalent to ISO2896.
ferent cellular plastics. It is intended for use in specifications,
product evaluation, and quality control. It is applicable to
2. Referenced Documents
specificend-usedesignrequirementsonlytotheextentthatthe
2
2.1 ASTM Standards: end-use conditions are similar to the immersion period (nor-
E96/E96MTest Methods for Water Vapor Transmission of mally 96 h) and 5.1-cm [2-in.] head requirements of the test
Materials method.
E691Practice for Conducting an Interlaboratory Study to
NOTE 2—Studies by ASTM Subcommittee D20.22 show that some
Determine the Precision of a Test Method
cellular plastics, particularly those with open cells or natural interstices,
continue to absorb additional significant amounts of water beyond the
96-h immersion period. It was also found that water absorption of some
cellular plastics is significantly higher when exposed to a greater pressure
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
head, as might be encountered in certain underwater installations.
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials -
5.2 This test method provides a means for measuring
Plastics and Elastomers.
Current edition approved Nov. 1, 2006. Published November 2006. Originally
absorption as a result of direct contact exposure to free water.
approved in 1969. Last previous edition approved in 2001 as D2842-01. DOI:
Results by this test method cannot be used to compare the
10.1520/D2842-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2842 − 06
resistance of cellular plastics to water vapor transmission and 6.2 Underwater Weighing
...

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