ASTM C1763-14
(Test Method)Standard Test Method for Water Absorption by Immersion of Thermal Insulation Materials
Standard Test Method for Water Absorption by Immersion of Thermal Insulation Materials
SIGNIFICANCE AND USE
6.1 This test method provides a means of measuring the water absorption of flat specimens of thermal insulation materials under isothermal conditions as a result of direct immersion in liquid water. It is intended for quality control and product and material specifications.
6.2 The procedure to be used: A, B, or C as well as any exceptions shall be noted in material specifications citing this test method.
6.3 Repeatability has been established only for one type and size of material at one immersion duration.
Note 1: Specifications referring to this test method are encouraged to establish repeatability for specific materials, immersion duration, and dimensions for inclusion in this test method.
SCOPE
1.1 This test method determines the amount of water retained (excluding surface water) by flat specimens of thermal insulations after these materials have been fully immersed in liquid water for a prescribed time interval under isothermal conditions. This test method is intended to be used for the characterization of materials in the laboratory. It is not intended to simulate any particular environmental condition potentially encountered in building construction applications.
1.2 This test method does not address all the possible mechanisms of water intake and retention and related phenomena for thermal insulations. It relates only to those conditions outlined in 1.1. Determination of moisture accumulation in thermal insulations due to partial immersion, water vapor transmission, internal condensation, freeze-thaw cycling, or a combination of these effects requires different test procedures.
1.3 This test method does not address or attempt to quantify the drainage characteristics of materials.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 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: C1763 − 14
StandardTest Method for
Water Absorption by Immersion of Thermal Insulation
Materials
This standard is issued under the fixed designation C1763; 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 Procedures A, B, and, C cannot be made. Cracks in the
specimens and rough surfaces can increase the apparent water
1.1 This test method determines the amount of water re-
absorption.
tained (excluding surface water) by flat specimens of thermal
insulations after these materials have been fully immersed in 2.2 Some materials tend to collect water on surfaces or to
liquid water for a prescribed time interval under isothermal trap water in corners and, if not removed, will give incorrect
conditions. This test method is intended to be used for the results.
characterizationofmaterialsinthelaboratory.Itisnotintended
2.3 Materials that change or react with water can have
to simulate any particular environmental condition potentially
increased (or decreased) apparent water absorption and are not
encountered in building construction applications.
suitable for use with this method. 12.5.1 provides a method for
1.2 This test method does not address all the possible ensuring the specimen has not been physically or chemically
mechanisms of water intake and retention and related phenom- altered in a way that would invalidate the measurement. Use
ena for thermal insulations. It relates only to those conditions this method in cases of dispute.
outlined in 1.1. Determination of moisture accumulation in
3. Referenced Documents
thermal insulations due to partial immersion, water vapor
transmission, internal condensation, freeze-thaw cycling, or a
3.1 ASTM Standards:
combination of these effects requires different test procedures.
C168 Terminology Relating to Thermal Insulation
C303 Test Method for Dimensions and Density of Pre-
1.3 This test method does not address or attempt to quantify
formed Block and Board–Type Thermal Insulation
the drainage characteristics of materials.
C870 Practice for Conditioning of Thermal Insulating Ma-
1.4 The values stated in either SI units or inch-pound units
terials
are to be regarded separately as standard. The values stated in
C1134 Test Method for Water Retention of Rigid Thermal
each system may not be exact equivalents; therefore, each
Insulations Following Partial Immersion
system shall be used independently of the other. Combining
E177 Practice for Use of the Terms Precision and Bias in
values from the two systems may result in non-conformance
ASTM Test Methods
with the standard.
E691 Practice for Conducting an Interlaboratory Study to
1.5 This standard does not purport to address all of the
Determine the Precision of a Test Method
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Terminology
priate safety and health practices and determine the applica-
4.1 Definitions—Terminology C168 applies to terms used in
bility of regulatory limitations prior to use.
this test method.
2. Material And Specimen Characteristics that can
5. Summary of Test Method
Influence Results
5.1 Test specimens are conditioned and then immersed in
2.1 The apparent water absorption measured by this test
water for a prescribed amount of time. The amount of water
method is dependent on the surface to volume ratio of the
absorbed is determined by the weight increase in the speci-
sample and time of immersion.As such, comparisons between
mens.
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
Insulation and is the direct responsibility of Subcommittee C16.33 on Insulation For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Finishes and Moisture. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2014. Published July 2014. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
C1763–14. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1763 − 14
6. Significance and Use 8.3.1 Test specimens shall be 305 63by305 63mm(12
by 12 in.) with all four edges trimmed square and thickness
6.1 This test method provides a means of measuring the
representative of manufactured product.
water absorption of flat specimens of thermal insulation
8.3.2 One specimen from each of three boards shall be
materials under isothermal conditions as a result of direct
tested.
immersion in liquid water. It is intended for quality control and
8.3.3 Immersion time shall be 2 h.
product and material specifications.
8.3.4 The specimen shall be drained by placing on end for
6.2 The procedure to be used: A, B, or C as well as any
10 min.
exceptions shall be noted in material specifications citing this
8.4 Procedure C:
test method.
8.4.1 Test specimens shall be 305 63by305 63mmby
6.3 Repeatability has been established only for one type and
25 mm thick. (12 by 12 in. by 1 in. thick.)
size of material at one immersion duration.
8.4.2 Three specimens shall be tested.
8.4.3 Immersion time shall be 24 h.
NOTE 1—Specifications referring to this test method are encouraged to
establish repeatability for specific materials, immersion duration, and 8.4.4 The specimen shall be shaken vigorously then
dimensions for inclusion in this test method.
weighed immediately after the removal of surface water.
7. Apparatus NOTE 2—Procedure A is typically used for perlite block insulation.
NOTE 3—Procedure B is typically used for cellulosic fiber insulating
7.1 Temperature measuring device—Such as a thermometer,
board and polyisocyanurate thermal insulation board.
graduated in Celsius or Fahrenheit degrees with at least 1ºC
NOTE 4—Procedure C is typically used for polystyrene thermal insula-
(2ºF) sensitivity. tion board.
7.2 Balance, accurate to 0.1g.
9. Preparation of Apparatus
7.3 Immersion Pan—Apan or vessel of width and length at
9.1 Fill the immersion pan with distilled, deionized water
least 50 mm (2 in.) larger than the dimensions of the specimen
sufficient to maintain a 25 mm (1 in.) head of water over the
width and length, and of a depth at least 50 mm (2 in.) greater
sample surface at all times during the test.
than the specimen thickness.
9.2 Allow the water to reach a steady temperature of 23 6
7.4 Timing device, such as stopwatch or timer capable of
1°C (73 6 2°F).
61% of the required immersion duration.
7.4.1 Specimen Supports and Constraints—Included in the
10. Calibration and Standardization
construction of the immersion pan shall be a means for
10.1 All measuring equipment shall have calibration certifi-
securing the specimens in a level position, that is, a noncorro-
cates that are current at the time of use of the equipment.
sive support for the bottom surface of the specimens and a
similar constraining device for the top surface for buoyant
11. Conditioning
materials. The support and constraining devices shall not
contact more than 15 % of the specimen surfaces. The space
11.1 Pre-condition per Test Method C870. Additional
between the support and the bottom of the pan shall be not less
conditioning, such as heat-soaking, shall be performed as
than 5 mm (0.2 in.). The pressure exerted on the specimens by required by the material specification.
the constraining device for the top surface shall be limited to
that required to counteract any buoyant force exerted by the 12. Procedure
specimens at the beginning of the test. Stainless steel is an
12.1 Measure test specimen dimensions and calculate den-
acceptable support and weight material. An example of a
sityperTestMethodC303.Weigheachspecimentothenearest
suitable constraining device is a 6.4 mm. (0.25 in.) mesh rigid
0.1 g. This weight is the pre-immersion weight, W .
stainless steel screen.
12.2 The selection of Procedure A, B, or C, including their
8. Sampling, Test Specimens, and Test Units proscribed sample size and duration of immersion, shall be
stated in the material or product specification.
8.1 Number of specimens, dimensions, and dimension tol-
erance of the test specimen or specimens shall be stated in the 12.3 Submerge each specimen horizontally in the pan under
material specification to follow one of the following proce- 25 6 2mm(1 6 0.1 in.) of distilled, deionized water.
dures: Specimens shall
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