ASTM C240-08(2012)
(Test Method)Standard Test Methods of Testing Cellular Glass Insulation Block
Standard Test Methods of Testing Cellular Glass Insulation Block
SIGNIFICANCE AND USE
4.1 From a general standpoint, these test methods outline the particular points which have to be taken into account when applying ASTM standard test methods to the case of cellular glass insulating block.
SCOPE
1.1 These test methods cover the testing of cellular glass insulation block for density, water absorption, compressive strength, flexural strength at ambient temperature; preparation for chemical analysis; and thermal conductivity measurements.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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.
General Information
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Standards Content (Sample)
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Designation: C240 − 08(Reapproved 2012)
Standard Test Methods of
Testing Cellular Glass Insulation Block
This standard is issued under the fixed designation C240; 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.
1. Scope C226Specification for Air-Entraining Additions for Use in
the Manufacture of Air-Entraining Hydraulic Cement
1.1 These test methods cover the testing of cellular glass
2.2 ISO Standard:
insulation block for density, water absorption, compressive
ISO 3951Sampling Procedure and Charts for Inspection by
strength, flexural strength at ambient temperature; preparation
Variables for Percent Nonconforming
forchemicalanalysis;andthermalconductivitymeasurements.
2.3 Military Standard:
1.2 The values stated in inch-pound units are to be regarded
MIL-I-24244SpecificationInsulationMaterialswithSpecial
as standard. The values given in parentheses are mathematical 4
Corrosion, Chloride, and Fluoride Requirements
conversions to SI units that are provided for information only
2.4 Other Standard:
and are not considered standard.
NRC 1.36Nonmetallic Thermal Insulation for Austenitic
1.3 This standard does not purport to address all of the
Stainless Steel
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.1 Definitions—Terminology C168 shall be considered as
bility of regulatory limitations prior to use.
applying to the terms considered in these test methods.
2. Referenced Documents
4. Significance and Use
2.1 ASTM Standards:
4.1 From a general standpoint, these test methods outline
C165TestMethodforMeasuringCompressivePropertiesof
the particular points which have to be taken into account when
Thermal Insulations
applying ASTM standard test methods to the case of cellular
C168Terminology Relating to Thermal Insulation
glass insulating block.
C177Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of 5. Test Methods
the Guarded-Hot-Plate Apparatus
5.1 General Sample Preparation—All tests have to be run
C203Test Methods for Breaking Load and Flexural Proper-
on dry specimens. In case of need, the sample must be
ties of Block-Type Thermal Insulation
unpacked and stored in a dry place in such a way that all
C303Test Method for Dimensions and Density of Pre-
surfaces are exposed to the ambient air for a minimum of 24
formed Block and Board–Type Thermal Insulation
hours before testing.
C390Practice for Sampling and Acceptance of Thermal
5.2 Density—DeterminethedensityinaccordancewithTest
Insulation Lots
Method C303. Preferably, the density shall be measured on a
C518Test Method for Steady-State Thermal Transmission
full block, 18 by 24 in. (450 by 600 mm) by full thickness.
Properties by Means of the Heat Flow Meter Apparatus
5.2.1 It shall be noted that density is interesting as such for
C871Test Methods for ChemicalAnalysis of Thermal Insu-
calculation of insulated equipment load and because it has
lationMaterialsforLeachableChloride,Fluoride,Silicate,
influence on the other important properties of cellular glass.
and Sodium Ions
But it shall not be considered in itself as a criterion for
acceptance in the case of cellular glass.
These test methods are under the jurisdiction of ASTM Committee C16 on
5.3 Water Absorption:
Thermal Insulation and are the direct responsibility of Subcommittee C16.32 on
Mechanical Properties.
Current edition approved Sept. 1, 2012. Published November 2012. Originally
ε1
approved in 1950. Last previous edition approved in 2008 as C240–08 . DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/C0240-08R12. 4th Floor, New York, NY 10036, http://www.ansi.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
Standards volume information, refer to the standard’s Document Summary page on Available from Director of Regulatory Standards, US Atomic Energy
the ASTM website. Commission, Washington, DC 20545.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C240 − 08 (2012)
5.3.1 Scope—This test method covers the determination of 5.4 Compressive Strength—Determine the compressive
water absorption of cellular glass insulating blocks by measur- strength in accordance with Test Method C165 Procedure A,
ing the amount of water retained as a result of complete with the following test parameters and specimen preparation
immersion for a prescribed time interval. Surface blotting is techniques:
used to correct for the water absorbed on the cut surface cells.
5.4.1 Each of the two parallel bearing surfaces of the
5.3.2 Significance and Use—This test method provides a
specimens shall be plane. When required, rub them on a
means of measuring the water absorption of cellular glass
suitable abrasive surface to produce the required flat surface.
insulating blocks under isothermal conditions as a result of
5.4.2 The test specimens shall preferably be one half block
direct immersion in liquid water. It is intended for use in
12 by 18 in. (300 by 450 mm) by nominal received thickness.
product evaluation and quality control.
Alternates include a quadrant 9 by 12 in. 225 by 300 mm() or
5.3.3 Equipment and Materials:
afullblock18by24in.(450by600mm)bynominalreceived
5.3.3.1 Balance, minimum 1500 g capacity and 0.1 g or
thickness.Aquadrant specimen shall be taken from any one of
greater sensitivity.
four equal area quadrants of the preformed block. The mini-
5.3.3.2 Immersion Tank, equipped with inert specimen sup-
mum acceptable specimen size is 8 by 8 in. (200 by 200 mm).
ports and top surface weights such as stainless steel.
The report shall include the specimen size.
5.3.3.3 Synthetic Sponge, 4 by 7 by 1.5 in. (100 by 180 by
5.4.3 Capbothbearingsurfacesofthespecimensasfollows:
40 mm) or larger. Sponges found acceptable to use include
Coat one surface with molten Type III or Type IV asphalt
cellulosic sponges and fine-pored absorbent synthetic plastic
(350,+50,−25°F (preheated to 177,+28,−14°C)), com-
sponges.
pletely filling the surface cells with a small excess. Such a
5.3.3.4 Test Room, with temperature of 70 6 5°F (21 6
coating application rate is approximately 0.20 lb/ft (1.0
3°C) and relative humidity of 50 6 10%.
kg/m ) 6 25%. Immediately press the hot coated block onto a
5.3.3.5 Distilled Water.
precut piece of felt or paper laying on a flat surface. This is to
5.3.4 Procedure:
prevent the asphalt surface from sticking to the compression
5.3.4.1 Carefully measure the thickness, width, and length
platten during the test. A lightweight kraft paper is suitable,
to the nearest 1 mm of a cellular glass block, preferably 2 by
although traditionally a Type 1 roofing felt paper, commonly
12 by 18 in. (50 by 300 by 450 mm) and calculate the volume
called a No. 15 asphalt felt, per Specification C226 has been
and exposed surface area.
used.
5.3.4.2 Weigh the specimen to the nearest 0.1 g (W ), then
NOTE 1—A hot asphalt capping is used to simulate field applied
submerge it horizontally under 25 mm (1 in.) of water
systems, which require a high load bearing insulation product, ranging
maintained at 70 6 5°F (21 6 3°C). Inert top surface weights
from roof applications to cryogenic storage tank base applications.
are required to keep it submerged.After submerging it for 2 h,
Uncapped material or different cappings will give different values.
set the specimen on end on a damp cotton bath towel to drain
Properly capped surfaces shall be approximately plane and
for 10 min.After the 10 min, remove the excess surface water
parallel. Set the specimens on edge, exposing both capped
byhandwithadampspongefor1minperlargefaceand1min
surfaces to room temperature for a minimum of 15 min to
for the four sides. Wring out the sponge before and once in
allow the asphalt to harden before testing.
between for each face and pass a minimum of two times on
5.4.4 The number of specimens to be tested and the sam-
each surface. Blot each face of the specimen equally by
pling plan shall conform to Practice C390 where applicable.
compressing the sponge by a minimum of 10% of its thick-
For the purpose of inspection by user’s representative or
ness. Weigh the specimen immediately (W ) to the nearest 0.1
independent third party, the number of specimens shall con-
g.
form to ISO 3951 inspection level S-4, 10.0%AQL using the
5.3.5 Calculation of Results—Calculate the weight of wa
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