ASTM D4799/D4799M-08(2013)e1
(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
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 differ between materials as well as between formulations of the same material. 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.
SCOPE
1.1 This practice describes test conditions and procedures for fluorescent UV and condensation exposures conducted according to Practices G151 and G154 for bituminous roofing and waterproofing materials that have a minimum softening point of approximately 95°C [200°F] as determined by Test Method D36. (Also see Terminology G113.)
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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Standards Content (Sample)
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Designation: D4799/D4799M − 08 (Reapproved 2013)
Standard Practice for
Accelerated Weathering Test Conditions and Procedures for
Bituminous Materials (Fluorescent UV, Water Spray, and
Condensation Method)
This standard is issued under the fixed designation D4799/D4799M; 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.
ε NOTE—Units information was editorially corrected in July 2013.
1. Scope G141 Guide for Addressing Variability in Exposure Testing
of Nonmetallic Materials
1.1 This practice describes test conditions and procedures
G147 Practice for Conditioning and Handling of Nonmetal-
for fluorescent UV and condensation exposures conducted
lic Materials for Natural and Artificial Weathering Tests
according to Practices G151 and G154 for bituminous roofing
G151 Practice for Exposing Nonmetallic Materials inAccel-
and waterproofing materials that have a minimum softening
erated Test Devices that Use Laboratory Light Sources
point of approximately 95°C [200°F] as determined by Test
G154 Practice for Operating Fluorescent Ultraviolet (UV)
Method D36. (Also see Terminology G113.)
Lamp Apparatus for Exposure of Nonmetallic Materials
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3. Summary of Test Method
each system may not be exact equivalents; therefore, each
3.1 Thin films of bitumen are uniformly applied to alumi-
system shall be used independently of the other. Combining
num panels. Shingles and similar materials are cut to size and
values from the two systems may result in non-conformance
exposed to specified cycles of temperature, light, and water. A
with the standard.
choice of three test cycles is given along with options for
1.3 This standard does not purport to address all of the
determining the period of exposure and evaluating results.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety and health practices and determine the applica-
4.1 This weathering apparatus is used for comparing the
bility of regulatory limitations prior to use.
weathering characteristics of bituminous materials against a
2. Referenced Documents control material for which the outdoor weathering characteris-
tics are known. It is not possible to establish a precise
2.1 ASTM Standards:
correlation between accelerated and natural weathering be-
D36 Test Method for Softening Point of Bitumen (Ring-and-
cause (1) there are geographical climatic variations, local
Ball Apparatus)
weather variations, and variations in local pollutants, and (2)
D1669 Practice for Preparation of Test Panels for Acceler-
the relation between accelerated and natural weathering is
ated and Outdoor Weathering of Bituminous Coatings
material dependent. Acceleration factors differ between mate-
D1670 TestMethodforFailureEndPointinAcceleratedand
rials as well as between formulations of the same material.
Outdoor Weathering of Bituminous Materials
Guide G141 provides guidance regarding this issue.
G113 Terminology Relating to Natural andArtificial Weath-
ering Tests of Nonmetallic Materials
NOTE 1—This practice can be used for other than bituminous materials,
but the significance and use have not been evaluated.
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
5. Apparatus
Waterproofing and is the direct responsibility of Subcommittee D08.02 on Steep
Roofing Products and Assemblies.
5.1 The fluorescent UV and condensation apparatus used
Current edition approved July 1, 2013. Published July 2013. Originally approved
shall conform to the requirements defined in Practices G151
in 1988. Last previous edition approved in 2008 as D4799 – 08. DOI: 10.1520/
and G154.
D4799_D4799M-08R13E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 Lamps—Unless otherwise specified, the lamps shall be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
fluorescent UVA-340 lamps as described in 6.1.3.1 of Practice
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. G154.
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D4799/D4799M − 08 (2013)
5.2.1 Other fluorescent UV lamps meeting the size and the spaces, fill the empty spaces with blank panels of corrosion
electrical characteristics in 5.2 may be used if mutually agreed resistant material to maintain the test conditions within the
upon and provided that the lamp and spectral energy distribu- chamber.
tion are reported in conformance with Section 9.
CycleA—4hUVat60±2.5°C,alternatingwith4h condensation
at 50 ± 2.5°C.
5.3 Moisture—Itispermittedtoexposethetestspecimensto
Cycle B— 20 h UV at 60 ± 2.5°C, alternating with 4 h condensation
at 50 ± 2.5°C.
moisture in the form of water spray, condensation, or high
Cycle C— 20 h UV at 80 ± 2.5°C, alternating with 4 h condensation
humidity.
at 50 ± 2.5°C.
5.3.1 Water Spray—It is permitted to equip the test chamber Cycle D—4hUVat60±2.5°C,15minwaterspray,alternatingwith
3.75 h condensation at 50 ± 2.5°C.
with a means to introduce intermittent water spray onto the test
Cycle E— 20 h UV at 60 ± 2.5°C, 15 min water spray, alternating with
specimens under specified conditions. The spray shall be
3.75 h condensation at 50 ± 2.5°C.
Cycle F— 20 h UV at 80 ± 2.5°C, 15 min water spray, alternating with
uniformly distributed over the samples. The spray system shall
3.75 h condensation at 50 ± 2.5°C.
be made from corrosion resistant materials that do not con-
7.3 If inspection of the panels is to be performed at any
taminate the water used.
stage in the cycle, the interruption of the test procedure shall
5.3.1.1 Spray Water Quality—Spray water shall have a
take only sufficient time to allow for such inspection. The time
conductivity below 5 µS/cm, contain less than 1-ppm solids,
taken for inspection of the samples shall not be counted as
...
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