ASTM C1104/C1104M-95
(Test Method)Standard Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation
Standard Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation
SCOPE
1.1 This test method covers the determination of the amount of water vapor sorbed by mineral fiber insulation exposed to a high-humidity atmosphere. This test method is applicable only to fibrous base material and binder. The results obtained by this test method cannot be used in describing faced products, since the facing is not tested by using this test method.
1.2 The water vapor sorption characteristics of materials may be affected by conditions such as elevated temperatures or chemical exposures. Values obtained as a result of this test method may not adequately describe the water vapor sorption characteristics of materials subjected to these conditions.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other.
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: C 1104/C 1104M – 95
Standard Test Method for
Determining the Water Vapor Sorption of Unfaced Mineral
Fiber Insulation
This standard is issued under the fixed designation C 1104/C 1104M; 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 method, since mineral fiber insulation may absorb water within
its bulk when viewed macroscopically, while it adsorbs water
1.1 This test method covers the determination of the amount
onto individual fibers on a microscopic scale.
of water vapor sorbed by mineral fiber insulation exposed to a
(1) sorption—refers to the taking up and holding of matter
high-humidity atmosphere. This test method is applicable only
by other matter by various processes such as absorption and
to fibrous base material and binder. The results obtained by this
adsorption.
test method cannot be used in describing faced products, since
(2) absorption—refers to the taking up of matter in-bulk by
the facing is not tested by using this test method.
other matter; for example, the penetration of substances into
1.2 The water vapor sorption characteristics of materials
the bulk of another solid or liquid.
may be affected by conditions such as elevated temperatures or
(3) adsorption—refers to surface retention or adhesion of an
chemical exposures. Values obtained as a result of this test
extremely thin layer of molecules to the surfaces of solids or
method may not adequately describe the water vapor sorption
liquids with which they are in contact.
characteristics of materials subjected to these conditions.
1.3 The values stated in either SI units or inch-pound units
4. Summary of Test Method
are to be regarded separately as standard. Within the text, the
4.1 The insulation is dried to a constant weight and exposed
inch-pound units are shown in parentheses. The values stated
to a high-humidity atmosphere for 96 h. The amount of water
in each system are not exact equivalents, therefore, each
sorbed from the vapor phase is the difference in specimen
system must be used independently of the other.
weights, and is expressed in either weight or volume percent.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 The sorption of water can result in an increase in weight
priate safety and health practices and determine the applica-
and a resultant potential degradation of the properties of the
bility of regulatory limitations prior to use.
insulation.
2. Referenced Documents
6. Apparatus
2.1 ASTM Standards:
6.1 Air-circulating oven, capable of maintaining a tempera-
C 167 Test Methods for Thickness and Density of Blanket
2 ture between 102° and 121°C (215° and 250°F).
or Batt Thermal Insulations
6.2 Desiccator, with calcium chloride as a desiccant.
C 302 Test Method for Density of Preformed Pipe-
2 6.3 Scale, accurate to 60.1 % of specimen weight.
Covering-Type Thermal Insulation
6.4 Environmental test chamber, capable of maintaining a
C 303 Test Method for Density of Preformed Block-Type
2 temperature of 49 6 2°C (120 6 3°F) and a relative humidity
Thermal Insulation
of 95 6 3%.
C 390 Criteria for Sampling and Acceptance of Preformed
2 6.5 Steel rule, graduated in 1 mm or 0.05 in. intervals with
Thermal Insulation Lots
depth gauge as described in Test Methods C 167.
3. Terminology 6.6 Sealable polyethylene sample bags of a size large
enough to accommodate the test specimens (for blanket, board,
3.1 Definitions of Terms Specific to This Standard:
or pipe thermal insulations).
3.1.1 The term sorption has been adopted for this test
6.7 Non-water-sorbing, non-corrosive tray with tight-
fitting lid measuring at least 15 by 15 cm (6 by 6 in.) (for
loose-fill insulations).
This test method is under the jurisdiction of Committee C-16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.33 on Thermal
Insulation Finishes and Vapor Transmission.
7. Sampling and Test Specimens
Current edition approved Aug. 15, 1995. Published September 1995. Originally
7.1 Three specimens shall be tested, unless otherwise stated
published as C 1104/C 1104M – 88. Last previous edition C 1104/C 1104M – 88.
Annual Book of ASTM Standards, Vol 04.06. in the appropriate material specification. These are to be
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 1104/C 1104M
obtained from one representative package of insulation. Sam- 9. Procedure B, for Loose-Fill Insulation Products
pling techniques should be in accordance with Criteria C 390.
9.1 If it is necessary to determine volume percent, measure
7.2 For blanket and board products, the test specimen shall
the length and width of the pre-weighed sample trays, using a
be of a size that can be conveniently tested in the environmen-
steel rule. Apply the insulation at its nominal or requested
tal chamber, but not smaller than 15 by 15 cm (6 by 6 in.) by
thickness and density by pouring or blowing it into the sample
the full sample thickness. For pipe insulation products, use a 15
tray. Measure the thickness of the specimens by means of a
cm (6 in.) length and as much of the circumference as can be
depth gauge. Calculate the volume of the specimens.
conveniently tested. For loose-fill products, the test specimen
9.2 Determine the moisture-free weight of each specimen in
shall consist of sufficient quantity of the material to fill a
the manner described in 9.2.1.
preweighed container measuring at least 15 by 15 cm (6 by 6
9.2.1 Weigh the sample tray containing the specimen. Place
in.), to a nominal depth at its nominal density.
the specimen in an air-circulating oven at a temperature of 102°
7.3 The insulation shall be tested without facing or jacket-
to 121°C (215° to 250°F) for a minimum of 2 h. (See Note 1.)
ing, unless otherwise agreed upon by the purchaser and
Place the pre-weighed lid on the sample tray, cool the specimen
supplier, or unless otherwise specified by the appropriate
to room temperat
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