ASTM C203-05
(Test Method)Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
SCOPE
1.1 These test methods cover the determination of the breaking load and calculated flexural strength of a rectangular cross section of a preformed block-type thermal insulation tested as a simple beam. It is also applicable to cellular plastics. Two test methods are described as follows:
1.1.1 Test Method I— A loading system utilizing center loading on a simply supported beam, supported at both ends.
1.1.2 Test Method II— A loading system utilizing two symmetric load points equally spaced from their adjacent support points at each end with a distance between load points of one half of the support span.
1.2 Either test method is capable of being used with the four procedures that follow:
1.2.1 Procedure A— Designed principally for materials that break at comparatively small deflections.
1.2.2 Procedure B— Designed particularly for those materials that undergo large deflections during testing.
1.2.3 Procedure C— Designed for measuring at a constant stress rate, using a CRL (constant rate of loading) machine. Used for breaking load measurements only.
1.2.4 Procedure D— Designed for measurements at a constant crosshead speed, using either a CRT (constant rate of traverse) or CRE (constant rate of extension) machine. Used for breaking load measurements using a fixed crosshead speed machine.
1.3 Comparative tests are capable of being run according to either method or procedure, provided that the method or procedure is found satisfactory for the material being tested.
1.4 These test methods are purposely general in order to accommodate the widely varying industry practices. It is important that the user consult the appropriate materials specification for any specific detailed requirements regarding these test methods.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.6This 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. For specific precautionary statements, see Section 11.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
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Designation: C 203 – 05
Standard Test Methods for
Breaking Load and Flexural Properties of Block-Type
1
Thermal Insulation
This standard is issued under the fixed designation C 203; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 1.5 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
1.1 These test methods cover the determination of the
information only.
breaking load and calculated flexural strength of a rectangular
1.6 This standard does not purport to address all of the
cross section of a preformed block-type thermal insulation
safety concerns, if any, associated with its use. It is the
testedasasimplebeam.Itisalsoapplicabletocellularplastics.
responsibility of the user of this standard to establish appro-
Two test methods are described as follows:
priate safety and health practices and determine the applica-
1.1.1 Test Method I—A loading system utilizing center
bility of regulatory limitations prior to use. For specific
loading on a simply supported beam, supported at both ends.
precautionary statements, see Section 11.
1.1.2 Test Method II—A loading system utilizing two
symmetric load points equally spaced from their adjacent
2. Referenced Documents
support points at each end with a distance between load points
2
2.1 ASTM Standards:
of one half of the support span.
C 133 Test Methods for Cold Crushing Strength and Modu-
1.2 Either test method is capable of being used with the four
lus of Rupture of Refractories
procedures that follow:
C 168 Terminology Relating to Thermal Insulation
1.2.1 Procedure A— Designed principally for materials that
C 390 Practice for Sampling and Acceptance of Preformed
break at comparatively small deflections.
Thermal Insulation Lots
1.2.2 Procedure B— Designed particularly for those mate-
C 870 Practice for Conditioning of Thermal Insulating Ma-
rials that undergo large deflections during testing.
terials
1.2.3 Procedure C— Designed for measuring at a constant
D76 SpecificationforTensileTestingMachinesforTextiles
stress rate, using a CRL (constant rate of loading) machine.
E4 Practice for Force Verification of Testing Machines
Used for breaking load measurements only.
1.2.4 Procedure D— Designed for measurements at a con-
3. Terminology
stant crosshead speed, using either a CRT (constant rate of
3.1 Terminology C 168 shall be considered applied to the
traverse) or CRE (constant rate of extension) machine. Used
terms used in this method.
for breaking load measurements using a fixed crosshead speed
machine.
4. Summary of Test Methods
1.3 Comparative tests are capable of being run according to
4.1 A bar of rectangular cross section is tested in flexure as
either method or procedure, provided that the method or
a beam as follows:
procedure is found satisfactory for the material being tested.
4.1.1 Test Method I—The bar rests on two supports and is
1.4 These test methods are purposely general in order to
loaded by means of a loading fitting or piece midway between
accommodate the widely varying industry practices. It is
the supports (see Fig. 1).
important that the user consult the appropriate materials
4.1.2 Test Method II—The bar rests on two supports and is
specification for any specific detailed requirements regarding
loaded at the two quarter points (by means of two loading
these test methods.
fittings), each an equal distance from the adjacent support
1
These test methods are under the jurisdiction of ASTM Committee C16 on
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Thermal Insulation and are the direct responsibility of Subcommittee C16.32 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Mechanical Properties. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2005. Published May 2005. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1945. Last previous edition approved 1999 as C 203 – 99. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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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.
C203–05
depending upon the accuracy required, these procedures are
capable of providing acceptable results.
5.2 Test Method I is especially useful when testing only for
the modulus of rupture
...
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