ASTM D4799-08
(Practice)Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Fluorescent UV, Water Spray, and Condensation Method)
Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Fluorescent UV, Water Spray, and Condensation Method)
SIGNIFICANCE AND USE
This weathering apparatus is used for comparing the weathering characteristics of bituminous materials against a control material for which the outdoor weathering characteristics are known. 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. Acceleration factors differ between materials as well as between formulations of the same material. 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 describes test conditions and procedures for fluorescent UV and condensation exposures conducted according to Practices G 151 and G 154 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 SI units are to be regarded as the standard. The values given in parentheses are for information only.
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: D4799 − 08
StandardPractice for
Accelerated Weathering Test Conditions and Procedures for
Bituminous Materials (Fluorescent UV, Water Spray, and
1
Condensation Method)
This standard is issued under the fixed designation D4799; 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 inAccel-
erated Test Devices that Use Laboratory Light Sources
1.1 This practice describes test conditions and procedures
G154 PracticeforOperatingFluorescentLightApparatusfor
for fluorescent UV and condensation exposures conducted
UV Exposure of Nonmetallic Materials
according to Practices G151 and G154 for bituminous roofing
and waterproofing materials that have a minimum softening
3. Summary of Test Method
point of approximately 95°C (200°F) as determined by Test
3.1 Thin films of bitumen are uniformly applied to alumi-
Method D36. (Also see Terminology G113.)
num panels. Shingles and similar materials are cut to size and
1.2 The values stated in SI units are to be regarded as the
exposed to specified cycles of temperature, light, and water. A
standard. The values given in parentheses are for information
choice of three test cycles is given along with options for
only.
determining the period of exposure and evaluating results.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This weathering apparatus is used for comparing the
responsibility of the user of this standard to establish appro-
weathering characteristics of bituminous materials against a
priate safety and health practices and determine the applica-
control material for which the outdoor weathering characteris-
bility of regulatory limitations prior to use.
tics are known. It is not possible to establish a precise
correlation between accelerated and natural weathering be-
2. Referenced Documents
cause (1) there are geographical climatic variations, local
2
2.1 ASTM Standards:
weather variations, and variations in local pollutants, and (2)
D36 Test Method for Softening Point of Bitumen (Ring-and-
the relation between accelerated and natural weathering is
Ball Apparatus)
material dependent. Acceleration factors differ between mate-
D1669 Practice for Preparation of Test Panels for Acceler-
rials as well as between formulations of the same material.
ated and Outdoor Weathering of Bituminous Coatings
Guide G141 provides guidance regarding this issue.
D1670 TestMethodforFailureEndPointinAcceleratedand
NOTE 1—This practice can be used for other than bituminous materials,
Outdoor Weathering of Bituminous Materials
but the significance and use have not been evaluated.
G113 Terminology Relating to Natural andArtificial Weath-
ering Tests of Nonmetallic Materials
5. Apparatus
G141 Guide for Addressing Variability in Exposure Testing
5.1 The fluorescent UV and condensation apparatus used
of Nonmetallic Materials
shall conform to the requirements defined in Practices G151
G147 Practice for Conditioning and Handling of Nonmetal-
and G154.
lic Materials for Natural and Artificial Weathering Tests
5.2 Lamps—Unless otherwise specified, the lamps shall be
fluorescent UVA-340 lamps as described in 6.1.3.1 of Practice
G154.
1
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
5.2.1 Other fluorescent UV lamps meeting the size and
Waterproofing and is the direct responsibility of Subcommittee D08.02 on Prepared
Roofings, Shingles and Siding Materials.
electrical characteristics in 5.2 may be used if mutually agreed
Current edition approved Feb. 1, 2008. Published February 2008. Originally
upon and provided that the lamp and spectral energy distribu-
approved in 1988. Last previous edition approved in 2003 as D4799 – 03. DOI:
tion are reported in conformance with Section 9.
10.1520/D4799-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Moisture—Itispermittedtoexposethetestspecimensto
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
moisture in the form of water spray, condensation, or high
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. humidity.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
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D4799 − 08
5.3.1 Water Spray—It is permitted to equip the test chamber
CycleA—4hUVat60±2.5°C,alternatingwith4h condensation
at 50 ± 2.5°C.
with a means to introduce intermittent water spray onto the test
Cyc
...
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:D4799–03 Designation:D4799–08
Standard Practice for
Accelerated Weathering Test Conditions and Procedures for
Bituminous Materials (Fluorescent UV, Water Spray, and
1
Condensation Method)
This standard is issued under the fixed designation D 4799; 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.
1. Scope
1.1 This practice describes test conditions and procedures for fluorescent UV and condensation exposures conducted according
to Practices G 151 and G 154 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 SI units are to be regarded as the standard. The values given in parentheses are for information only.
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:
D 36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
D 1669 Practice for Preparation of Test Panels for Accelerated and Outdoor Weathering of Bituminous Coatings
D 1670 Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
G 113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G 141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
G 147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
G 151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G 154 Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
3. Summary of Test Method
3.1 Thin films of bitumen are uniformly applied to aluminum panels. Shingles and similar materials are cut to size and exposed
to specified cycles of temperature, light, and water. A choice of three test cycles is given along with options for determining the
period of exposure and evaluating results.
4. Significance and Use
4.1This weathering apparatus is used for comparing the weathering characteristics of bituminous materials against a reference
material in which the outdoor weathering characteristics are known. It is not possible to establish a precise correlation between
accelerated and natural weathering because of geographical climatic variations, local weather variation from normal, and local
pollutants. Guide G141
4.1 This weathering apparatus is used for comparing the weathering characteristics of bituminous materials against a control
material for which the outdoor weathering characteristics are known. 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. Acceleration factors
differbetweenmaterialsaswellasbetweenformulationsofthesamematerial.GuideG 141providesguidanceregardingthisissue.
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,Shingles and Siding Materials.
Current edition approved Jan. 10, 2003.Feb. 1, 2008. Published February 2003.2008. Originally approved in 1988. Last previous edition approved in 20002003 as
D 4799 – 003.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 04.04.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, PA19428-2959, United States.
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D4799–08
5. Apparatus
5.1 The fluorescent UV and condensation apparatus used shall conform
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