ASTM C120/C120M-19
(Test Method)Standard Test Methods for Flexure Testing of Structural and Roofing Slate
Standard Test Methods for Flexure Testing of Structural and Roofing Slate
SIGNIFICANCE AND USE
5.1 These test methods are useful in indicating the differences in flexure (breaking load, modulus of rupture) between various slates. These test methods also provide one element in the comparison of roofing slates under Specification C406 and structural slates under Specification C629.
SCOPE
1.1 These test methods cover determination of the breaking load of roofing slate and modulus of rupture of structural slate by use of simple three-point loading.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:C120/C120M −19
Standard Test Methods for
1
Flexure Testing of Structural and Roofing Slate
This standard is issued under the fixed designation C120/C120M; 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.
INTRODUCTION
Breaking load test results of roofing slate under this test method are only valid for the commercial
supplyofslatesofthatthicknessorgreater.Forthecommercialsupplyofthinnerroofingslates,testing
on samples of the minimum specified thickness must be conducted.
When comparing roofing slates of equal thickness, but from various sources, slates which meet the
required breaking load at the lowest specimen thickness will yield the best performance on the roof
in terms of resistance to impact damage.
The reliability of the data produced under this test method is largely influenced by the care and
protocol used in obtaining and preparing the test specimens.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods cover determination of the breaking
C119 Terminology Relating to Dimension Stone
load of roofing slate and modulus of rupture of structural slate
C406 Specification for Roofing Slate
by use of simple three-point loading.
C629 Specification for Slate Dimension Stone
1.2 The values stated in either SI units or inch-pound units
E4 Practices for Force Verification of Testing Machines
are to be regarded separately as standard. The values stated in
E145 Specification for Gravity-Convection and Forced-
each system are not necessarily exact equivalents; therefore, to
Ventilation Ovens
ensure conformance with the standard, each system shall be
3. Terminology
used independently of the other, and values from the two
systems shall not be combined.
3.1 Definitions—All definitions are in accordance with Ter-
minology C119.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 Prepared and conditioned test specimens are placed on
priate safety, health, and environmental practices and deter-
two support blocks in a test stand and loaded vertically at their
mine the applicability of regulatory limitations prior to use.
center point by a third block.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5. Significance and Use
ization established in the Decision on Principles for the
5.1 These test methods are useful in indicating the differ-
Development of International Standards, Guides and Recom-
ences in flexure (breaking load, modulus of rupture) between
mendations issued by the World Trade Organization Technical
various slates. These test methods also provide one element in
Barriers to Trade (TBT) Committee.
the comparison of roofing slates under Specification C406 and
structural slates under Specification C629.
1
These test methods are under the jurisdiction of ASTM Committee C18 on
Dimension Stone and are the direct responsibility of Subcommittee C18.01 on Test
2
Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2019. Published December 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1925. Last previous edition approved in 2015 as C120/C120M-15a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0120_C0120M-19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C120/C120M−19
6. Apparatus machine shall be within 1 % for the range from 10 to 1000 lbf
[50 to 5000 N] and capable of being read to the nearest 5 lbf
6.1 Ventilated Oven—Conformingtotherequirementsofthe
(20 N).
applicable sections of Specification E145, and capable of
maintaining a temperature of 140 6 4°F (60 6 2°C) and large 6.3 Load Application and Support Blocks—The supports for
enough to accommodate the test specimens. the specimens shall be of the rocker type (Fig. 1) with the
edges at least as long as the width of the specimen. The load
6.2 Testing Machine—(see Fig. 1), conforming to the re-
application block may be of either the rocker or rigid type. The
quirements of the applicable sections of Practices E4. The
portions of the load application and
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C120/C120M − 15a C120/C120M − 19
Standard Test Methods for
1
Flexure Testing of Structural and Roofing Slate
This standard is issued under the fixed designation C120/C120M; 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.
INTRODUCTION
Breaking load test results of roofing slate under this test method are only valid for the commercial
supply of slates of that thickness or greater. For the commercial supply of thinner roofing slates, testing
on samples of the minimum specified thickness must be conducted.
When comparing roofing slates of equal thickness, but from various sources, slates which meet the
required breaking load at the lowest specimen thickness will yield the best performance on the roof
in terms of resistance to impact damage.
The reliability of the data produced under this test method is largely influenced by the care and
protocol used in obtaining and preparing the test specimens.
1. Scope
1.1 These test methods cover determination of the breaking load of roofing slate and modulus of rupture of structural slate by
use of simple three-point loading.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C119 Terminology Relating to Dimension Stone
C406 Specification for Roofing Slate
C629 Specification for Slate Dimension Stone
E4 Practices for Force Verification of Testing Machines
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
3. Terminology
3.1 Definitions—All definitions are in accordance with Terminology C119.
4. Summary of Test Method
4.1 Prepared and conditioned test specimens are placed on two support blocks in a test stand and loaded vertically at their center
point by a third block.
1
These test methods are under the jurisdiction of ASTM Committee C18 on Dimension Stone and are the direct responsibility of Subcommittee C18.01 on Test Methods.
Current edition approved Nov. 15, 2015Nov. 1, 2019. Published January 2016November 2019. Originally approved in 1925. Last previous edition approved in 2015 as
C120/C120M-15.-15a. DOI: 10.1520/C0120_C0120M-15A.10.1520/C0120_C0120M-19.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C120/C120M − 19
5. Significance and Use
5.1 These test methods are useful in indicating the differences in flexure (breaking load, modulus of rupture) between various
slates. These test methods also provide one element in the comparison of roofing slates under Specification C406 and structural
slates under Specification C629.
6. Apparatus
6.1 Ventilated Oven—Conforming to the requirements of the applicable sections of Specification E145, and capable of
maintaining a temperature of 140 6 4°F (60 6 2°C) and large enough to accommodate the test specimens.
6.2 Testing Machine—(see Fig. 1), conforming to the requirements of the applicable sections of Practices E4. The three-point
loading method shall be used in conducting flexure tests employing support and loading blocks that will ensure that forces applied
to the beam sill be vertical only and applied without ec
...
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