ASTM D4798/D4798M-09
(Test Method)Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
SIGNIFICANCE AND USE
It is not possible to establish a precise correlation between accelerated and natural weathering because (1) there are geographical climatic variations, local weather variations, and variations in local pollutants, and (2) the relation between accelerated and natural weathering is material dependent with differences in acceleration factors between materials as well as for different formulations of the same material. This weathering apparatus and procedure are used for comparing the weathering characteristics of bituminous materials against a control material for which the outdoor weathering characteristics are known. Guide G 141 provides guidance regarding this issue.
Note 1—This practice can be used for other than bituminous materials, but the significance and use have not been evaluated.
SCOPE
1.1 This practice covers test conditions and procedures for xenon-arc exposures according to Practices G 151 and G 155 for bituminous roofing and waterproofing materials that have a minimum softening point of approximately 95°C [200°F] as determined by Test Method D 36. (Also see Terminology G 113.)
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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.
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Designation:D4798/D4798M–09
Standard Practice for
Accelerated Weathering Test Conditions and Procedures for
1
Bituminous Materials (Xenon-Arc Method)
This standard is issued under the fixed designation D4798/D4798M; 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 G151 Practice for Exposing Nonmetallic Materials in Ac-
celerated Test Devices that Use Laboratory Light Sources
1.1 This practice covers test conditions and procedures for
G155 PracticeforOperatingXenonArcLightApparatusfor
xenon-arcexposuresaccordingtoPracticesG151andG155for
Exposure of Non-Metallic Materials
bituminous roofing and waterproofing materials that have a
minimum softening point of approximately 95°C [200°F] as
3. Summary of Test Method
determined by Test Method D36. (Also see Terminology
3.1 Thin films of bitumen are uniformly applied to alumi-
G113.)
num panels. Shingles and similar products are cut to size and
1.2 The values stated in either SI units or inch-pound units
exposed to specified cycles of temperature, light, and water.A
are to be regarded separately as standard. The values stated in
choice of two test cycles is given along with options for
each system may not be exact equivalents; therefore, each
determining the period of exposure and evaluating results.
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
4. Significance and Use
with the standard.
4.1 It is not possible to establish a precise correlation
1.3 This standard does not purport to address all of the
between accelerated and natural weathering because (1) there
safety concerns, if any, associated with its use. It is the
are geographical climatic variations, local weather variations,
responsibility of the user of this standard to establish appro-
and variations in local pollutants, and (2) the relation between
priate safety and health practices and determine the applica-
accelerated and natural weathering is material dependent with
bility of regulatory limitations prior to use.
differences in acceleration factors between materials as well as
for different formulations of the same material. This weather-
2. Referenced Documents
2 ing apparatus and procedure are used for comparing the
2.1 ASTM Standards:
weathering characteristics of bituminous materials against a
D36 Test Method for Softening Point of Bitumen (Ring-
control material for which the outdoor weathering characteris-
and-Ball Apparatus)
tics are known. Guide G141 provides guidance regarding this
D1669 Practice for Preparation of Test Panels for Acceler-
issue.
ated and Outdoor Weathering of Bituminous Coatings
D1670 Test Method for Failure End Point in Accelerated
NOTE 1—Thispracticecanbeusedforotherthanbituminousmaterials,
and Outdoor Weathering of Bituminous Materials but the significance and use have not been evaluated.
G113 TerminologyRelatingtoNaturalandArtificialWeath-
5. Apparatus
ering Tests of Nonmetallic Materials
5.1 The xenon-arc apparatus used shall conform to the
G141 Guide forAddressing Variability in Exposure Testing
requirements defined in Practices G151 and G155.
of Nonmetallic Materials
5.2 Filters—Daylight filter as described in Practice G155.
G147 Practice for Conditioning and Handling of Nonmetal-
5.3 Radiometer—The use of a radiometer to monitor and
lic Materials for Natural and Artificial Weathering Tests
control the amount of radiant energy received at the specimen
is required. The use of the radiometer shall comply with the
1
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
requirements in Practice G151.
Waterproofing and is the direct responsibility of Subcommittee D08.02 on Prepared
Roofings, Shingles and Siding Materials.
6. Test Specimens
Current edition approved Aug. 1, 2009. Published August 2009. Originally
approved in 1988. Last previous edition approved in 2004 as D4798–04. DOI:
6.1 Unless otherwise agreed upon, test specimens shall be
10.1520/D4798_D4798M-09.
3 7
approximately 70 by 150 mm [2 ⁄4 by 5 ⁄8 in.]. Bituminous
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
materials shall be applied as uniform coatings on aluminum
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.
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D4798/D4798M–09
NOTE 2—For exposures in which relative humidity is controlled, the
panels in
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D4798–08 Designation:D4798/D4798M–09
Standard Practice for
Accelerated Weathering Test Conditions and Procedures for
1
Bituminous Materials (Xenon-Arc Method)
This standard is issued under the fixed designation D4798/D4798M; 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 test conditions and procedures for xenon-arc exposures according to Practices G151 and G155 for
bituminous roofing and waterproofing materials that have a minimum softening point of approximately 95°C (200°F)[200°F] as
determined by Test Method D36. (Also see Terminology G113.)
1.2The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
D1669 Practice for Preparation of Test Panels for Accelerated and Outdoor Weathering of Bituminous Coatings
D1670 Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials
3. Summary of Test Method
3.1 Thin films of bitumen are uniformly applied to aluminum panels. Shingles and similar products are cut to size and exposed
to specified cycles of temperature, light, and water. A choice of two test cycles is given along with options for determining the
period of exposure and evaluating results.
4. Significance and Use
4.1 It is not possible to establish a precise correlation between accelerated and natural weathering because (1) there are
geographical climatic variations, local weather variations, and variations in local pollutants, and (2) the relation between
accelerated and natural weathering is material dependent with differences in acceleration factors between materials as well as for
different formulations of the same material. This weathering apparatus and procedure are used for comparing the weathering
characteristics of bituminous materials against a control material for which the outdoor weathering characteristics are known.
Guide G141 provides guidance regarding this issue.
NOTE 1—This practice can be used for other than bituminous materials, but the significance and use have not been evaluated.
1
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02 on Prepared
Roofings, Shingles and Siding Materials.
Current edition approved Feb.Aug. 1, 2008.2009. Published March 2008.August 2009. Originally approved in 1988. Last previous edition approved in 2004 as
D4798–04.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book ofASTM 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 ----------------------
D4798/D4798M–09
5. Apparatus
5.1 The xenon-arc apparatus used shall conform to the requirements defined in Practices G151 and G155.
5.2 Filters—Daylight filter as described in Practice G155.
5.3 Radiometer—The use of a radiometer to monitor a
...
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