ASTM E2923-14
(Practice)Standard Practice for Longevity Assessment of Firestop Materials Using Differential Scanning Calorimetry
Standard Practice for Longevity Assessment of Firestop Materials Using Differential Scanning Calorimetry
SIGNIFICANCE AND USE
5.1 Firestop systems are exposed to fire tests and classified using materials that have been, in all likelihood, quite recently manufactured. The testing provides a fire resistance rating for the firestop system that is measured in hours. The goal of firestop system testing is to identify and list firestop systems that will have a fire resistance rating that is no less than the fire resistance rating of the classified wall or floor assembly in which it is installed. A building fire that could put the firestop system to the test can occur at any time during the life of the building. By that time, the firestop system is composed of materials that have aged. Some assurance is desired to establish quantitatively that the firestop system will continue to have a fire resistance rating that is no less than that of the wall or floor assembly.
5.2 This practice provides one method for examining whether any changes are to be expected in the characteristics of a firestop material during its design life, as gauged by any chemical reactions that occur within the material to change it. The measurement of conversion rate provides a standard measure of how much a material will change over its design life. This provides an objective indication of whether the bulk of the material is likely to exhibit the desirable properties for which it was chosen in the firestop system.
5.3 Measurement of conversion rate allows different firestop materials used for similar purposes to be compared with respect to their ability to remain unchanged during their design life.
5.3.1 This allows materials with an unusually high conversion rate to be questioned and possibly rejected early on during the research and development process.
5.3.2 This allows materials to be screened by testing and listing agencies to ensure that they do not provide a listing for products that are not likely to have adequate performance for the full length of the intended design life.
5.3.3 This allows formulation...
SCOPE
1.1 This practice covers a standardized procedure for quantitatively assessing the longevity of materials used in firestop systems, by the use of data obtained from differential scanning calorimetry.
1.2 This practice is intended to differentiate firestop materials that are expected to maintain performance characteristics over time from those that are expected to degrade in performance characteristics over time. DSC experimental curve evaluation can also deliver indifferent results, where an interpretation of sample properties is not possible without additional testing using conventional durability testing. It evaluates the extent of chemical reactions that will occur within the firestop material under specified conditions of temperature and humidity. This practice does not measure longevity under specific severe environmental conditions or building operation that might be experienced by an individual firestop system.
1.3 This practice is intended to be used to test the materials used within a firestopping system. The practice is not intended to be used to test the properties of assembled firestopping systems.
1.4 This practice is intended to evaluate the following types of materials used in through-penetration fire stops:
1.4.1 Endothermic,
1.4.2 Intumescent,
1.4.3 Insulation,
1.4.4 Ablatives, and
1.4.5 Subliming.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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. Some specific hazards are given in Section 8 on Hazards.
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Designation: E2923 − 14
Standard Practice for
Longevity Assessment of Firestop Materials Using
1
Differential Scanning Calorimetry
This standard is issued under the fixed designation E2923; 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 priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Some specific
1.1 This practice covers a standardized procedure for quan-
hazards are given in Section 8 on Hazards.
titatively assessing the longevity of materials used in firestop
systems, by the use of data obtained from differential scanning
2. Referenced Documents
calorimetry.
2
2.1 ASTM Standards:
1.2 This practice is intended to differentiate firestop mate-
E814Test Method for Fire Tests of Penetration Firestop
rials that are expected to maintain performance characteristics
Systems
over time from those that are expected to degrade in perfor-
E2041Test Method for Estimating Kinetic Parameters by
mance characteristics over time. DSC experimental curve
Differential Scanning Calorimeter Using the Borchardt
evaluation can also deliver indifferent results, where an inter-
and Daniels Method
pretation of sample properties is not possible without addi-
tionaltestingusingconventionaldurabilitytesting.Itevaluates
3. Terminology
the extent of chemical reactions that will occur within the
3.1 Definitions:
firestop material under specified conditions of temperature and
3.1.1 firestop material, n—the part of a firestop system that
humidity. This practice does not measure longevity under
providesthenecessarysealtopreventthepassageofflameand
specific severe environmental conditions or building operation
hot gases when tested in accordance with Test Method E814.
that might be experienced by an individual firestop system.
This includes any material that serves the purpose of closing
1.3 This practice is intended to be used to test the materials
and sealing the gap(s) created in a fire-resistance rated wall or
used within a firestopping system.The practice is not intended
floor to accommodate a through-penetration.
to be used to test the properties of assembled firestopping
3.1.2 longevity, n—ameasureofthelengthoftimeaproduct
systems.
meets specified performance requirements.
1.4 This practice is intended to evaluate the following types
3.1.2.1 Discussion—Longevity is not intended to be a mea-
of materials used in through-penetration fire stops:
sure of how long a product retains the precise properties that it
1.4.1 Endothermic,
had at the time of manufacture. Most materials will change
1.4.2 Intumescent,
over time to some extent, so a measurement of time before
1.4.3 Insulation,
discernible change occurs would not generally be realistic or
1.4.4 Ablatives, and
useful. Rather, longevity is intended to be a measure of how
1.4.5 Subliming.
long a product retains its properties to a sufficient degree to be
deemed as meeting the purpose(s) for which it was manufac-
1.5 The values stated in SI units are to be regarded as
tured.
standard. No other units of measurement are included in this
standard.
4. Summary of Practice
1.6 This standard does not purport to address all of the
4.1 A small sample of the firestop material is tested by
safety concerns, if any, associated with its use. It is the
differential scanning calorimetry in accordance with Test
responsibility of the user of this standard to establish appro-
Method E2041 to determine the following information:
4.1.1 Calculation of total released energy.
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
mance of Buildings and is the direct responsibility of Subcommittee E06.21 on
2
Serviceability. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2014. Published May 2014. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2013. Last previous edition approved in 2013 as E2923–13. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2923–14 the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E2923 − 14
4.1.2 Determination of reaction order. where they may be regularly exposed to unusually high
4.1.3 Determination of activation energy and Arrhenius temperatures, or for suitability in installations which are
intended to have an unusually long design life, or both.
frequency factor.
4.1.4 Calculation of the conversion rate for 270 days at
...
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: E2923 − 13 E2923 − 14
Standard Practice for
Longevity Assessment of Firestop Materials Using
1
Differential Scanning Calorimetry
This standard is issued under the fixed designation E2923; 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
1.1 This practice covers a standardized procedure for quantitatively assessing the longevity of materials used in firestop systems,
by the use of data obtained from differential scanning calorimetry.
1.2 This practice is intended to differentiate firestop materials that are expected to maintain performance characteristics over
time from those that are expected to degrade in performance characteristics over time. DSC experimental curve evaluation can also
deliver indifferent results, where an interpretation of sample properties is not possible without additional testing using conventional
durability testing. It evaluates the extent of chemical reactions that will occur within the firestop material under specified conditions
of temperature and humidity. This practice does not measure longevity under specific severe environmental conditions or building
operation that might be experienced by an individual firestop system.
1.3 This practice is intended to be used to test the materials used within a firestopping system. The practice is not intended to
be used to test the properties of assembled firestopping systems.
1.4 This practice is intended to evaluate the following types of materials used in through-penetration fire stops:
1.4.1 Endothermic,
1.4.2 Intumescent,
1.4.3 Insulation,
1.4.4 Ablatives, and
1.4.5 Subliming.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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. Some specific hazards are given in Section 8 on Hazards.
2. Referenced Documents
2
2.1 ASTM Standards:
E814 Test Method for Fire Tests of Penetration Firestop Systems
E2041 Test Method for Estimating Kinetic Parameters by Differential Scanning Calorimeter Using the Borchardt and Daniels
Method
3. Terminology
3.1 Definitions:
3.1.1 firestop material, n—the part of a firestop system that provides the necessary seal to prevent the passage of flame and hot
gases when tested in accordance with Test Method E814. This includes any material that serves the purpose of closing and sealing
the gap(s) created in a fire-resistance rated wall or floor to accommodate a through-penetration.
3.1.2 longevity, n—a measure of the length of time a product meets specified performance requirements.
1
This practice is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.21 on Serviceability.
Current edition approved April 1, 2013May 1, 2014. Published April 2013May 2014. Originally approved in 2013. Last previous edition approved in 2013 as E2923–13.
DOI: 10.1520/E2923–1310.1520/E2923–14
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.
3.1.2.1 Discussion—
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E2923 − 14
Longevity is not intended to be a measure of how long a product retains the precise properties that it had at the time of manufacture.
Most materials will change over time to some extent, so a measurement of time before discernible change occurs would not
generally be realistic or useful. Rather, longevity is intended to be a measure of how long a product retains its properties to a
sufficient degree to be deemed as meeting the purpose(s) for which it was manufactured.
4. Summary of Practice
4.1 A small sample of the firestop material is tested by differential scanning calorimetry in accordance with Test Method E2041
to determine the following information:
4.1.1 Calculation of total released energy
...
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