ASTM E2094-02
(Practice)Standard Practice for Evaluating the Service Life of Chromogenic Glazings (Withdrawn 2011)
Standard Practice for Evaluating the Service Life of Chromogenic Glazings (Withdrawn 2011)
SIGNIFICANCE AND USE
This practice is important because producers of chromogenic glazings cannot wait for real-time in-service use to assess the product lifetime. Thus, a procedure is needed to estimate failure times based on accelerated weathering and related factors and tests. This practice does not provide guidance for how to follow the steps outlined as follows, but it provides as much information as is practical in an ASTM practice.
SCOPE
1.1 This practice is intended to provide guidance to architects, specifiers, manufacturers, and other parties who have an interest in evaluating the service life of chromogenic glazings.
1.2 This practice is intended to cover the main factors about service life that must be considered when evaluating glazings for performance until the failure time is reached. However, users of this practice must be aware that other factors must be considered, such as the effect of the interaction of materials, the use of the glazings, and to the environment in which a chromogenic glazing is exposed over its service life. Users of this practice are specifically cautioned to be aware that failure of the plastic polyurethane thermal barrier in an aluminum window containing a chromogenic blazing can cause a spreading or outward rotation of the glazing leges, called "hinging" or "clamming," which reduces the edge pressure on an insulated glazing (IG) unit, causing edge seal failure of the IG unit and allowing water to enter the IG unit and the glazing pocket.
1.3 The test methods referenced herein are laboratory tests conducted under specified conditions. These test methods are intended to simulate and, in some cases, to also accelerate actual in-service use of the chromogenic glazings. Results from these test methods cannot be used to predict the performance with time of units in the field unless actual corresponding field tests have been conducted and appropriate analyses have been conducted to show performance can be predicted from accelerated aging test methods.
WITHDRAWN RATIONALE
This practice is intended to provide guidance to architects, specifiers, manufacturers, and other parties who have an interest in evaluating the service life of chromogenic glazings.
Formerly under the jurisdiction of Committee E06 on Performance of Buildings, this practice was withdrawn in January 2011 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:E2094–02
Standard Practice for
1
Evaluating the Service Life of Chromogenic Glazings
This standard is issued under the fixed designation E2094; 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 G113 TerminologyRelatingtoNaturalandArtificialWeath-
ering Tests of Nonmetallic Materials
1.1 This practice is intended to provide guidance to archi-
tects, specifiers, manufacturers, and other parties who have an
3. Terminology
interest in evaluating the service life of chromogenic glazings.
3.1 Definitions—Refer to the terminology given in Termi-
1.2 This practice is intended to cover the main factors about
nologies C168 and G113 and Practice E632 for definitions of
service life that must be considered when evaluating glazings
general terms.
for performance until the failure time is reached. However,
3.2 Definitions of Terms Specific to This Standard:
users of this practice must be aware that other factors must be
3.2.1 accelerated aging test—anagingtestinwhichtherate
considered,suchastheeffectoftheinteractionofmaterials,the
of degradation of building components or materials is inten-
use of the glazings, and to the environment in which a
tionally accelerated over that expected in actual service.
chromogenic glazing is exposed over its service life. Users of
3.2.2 chromogenic glazing—a glazing consisting of one or
this practice are specifically cautioned to be aware that failure
more layers of chromogenic materials, which are able to alter
of the plastic polyurethane thermal barrier in an aluminum
their optical properties in response to a change in ambient
window containing a chromogenic blazing can cause a spread-
conditions such as illumination intensity, temperature, applied
ingoroutwardrotationoftheglazingleges,called“hinging”or
electric field, and so forth. The changeable optical properties
“clamming,” which reduces the edge pressure on an insulated
include transmittance, reflectance, absorptance, and emittance.
glazing (IG) unit, causing edge seal failure of the IG unit and
3.2.3 durability—the capability of maintaining the service-
allowing water to enter the IG unit and the glazing pocket.
abilityofaproduct,component,assembly,orconstructionover
1.3 The test methods referenced herein are laboratory tests
a specified time.
conducted under specified conditions. These test methods are
3.2.4 serviceability—the capability of a building product,
intended to simulate and, in some cases, to also accelerate
component, assembly, or construction to perform the func-
actualin-serviceuseofthechromogenicglazings.Resultsfrom
tion(s) for which it was designed and constructed.
these test methods cannot be used to predict the performance
3.2.5 service life (of a building component or material)—
with time of units in the field unless actual corresponding field
the period of time after installation during which all properties
tests have been conducted and appropriate analyses have been
exceed minimum acceptable values when routinely main-
conducted to show performance can be predicted from accel-
tained.
erated aging test methods.
4. Significance and Use
2. Referenced Documents
2 4.1 This practice is important because producers of chro-
2.1 ASTM Standards:
mogenic glazings cannot wait for real-time in-service use to
C168 Terminology Relating to Thermal Insulation
assess the product lifetime. Thus, a procedure is needed to
E632 Practice for Developing Accelerated Tests to Aid
estimate failure times based on accelerated weathering and
PredictionoftheServiceLifeofBuildingComponentsand
related factors and tests. This practice does not provide
Materials
guidance for how to follow the steps outlined as follows, but it
provides as much information as is practical in an ASTM
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
practice.
mance of Buildings and is the direct responsibility of Subcommittee E06.22 on
Durability Performance of Building Constructions.
5. Background
Current edition approved Oct. 10, 2002. Published November 2002. Originally
5.1 Observations and measurements have shown that some
approved in 2000. Last previous edition approved in 2002 as E2094 – 00. DOI:
10.1520/E2094-02.
of the performance characteristics of chromogenic glazings
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
have a tendency to deteriorate over time. In selecting materials
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and glazings for any application, the ability of that glazing to
Standards volume information, refer to the standard’s Document Summary p
...
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