ASTM D529-00
(Practice)Standard Practice for Enclosed Carbon-Arc Exposures of Bituminous Materials
Standard Practice for Enclosed Carbon-Arc Exposures of Bituminous Materials
SCOPE
1.1 This test method covers test conditions and procedures that are applicable when Practice G23 is employed for the exposure of bituminous roofing and waterproofing materials having a minimum softening point of approximately 200°F (95°C) as determined by Test Method D36.
1.2 This standard does not purport to address all of the safety problems, 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: D 529 – 00
Standard Practice for
Enclosed Carbon-Arc Exposures of Bituminous Materials
This standard is issued under the fixed designation D 529; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope G 153 Practice for Operating Enclosed Carbon-Arc Light
Apparatus for Exposure of Nonmetallic Materials
1.1 This practice describes test conditions and procedures
for enclosed carbon-arc exposures conducted according to
3. Summary of Practice
Practices G 151 and G 153 for bituminous roofing and water-
3.1 Thin films of bitumen are uniformly applied to alumi-
proofing materials that have a minimum softening point of
num panels. Shingles and similar products are cut to size and
approximately 95°C (200°F) as determined by Test Method
exposed to specified cycles of temperature, light, and water. A
D 36. (Also see Terminology G 113.)
choice of two test cycles is given along with options for
1.2 The values stated in SI units are to be regarded as the
determining the period of exposure and evaluating results.
standard. The values given in parentheses are for information
only.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 It is not possible to establish a precise correlation
safety concerns, if any, associated with its use. It is the
between accelerated and natural weathering because of geo-
responsibility of the user of this standard to establish appro-
graphical climatic variations, local weather variation from
priate safety and health practices and determine the applica-
normal, and local pollutants. This weathering apparatus and
bility of regulatory limitations prior to use.
procedure are used for comparing the weathering characteris-
2. Referenced Documents tics of bituminous materials against a reference material for
which the outdoor weathering characteristics are known. Guide
2.1 ASTM Standards:
G 141 provides guidance regarding this issue.
D 36 Test Method for Softening Point of Bitumen (Ring-
and-Ball Apparatus)
5. Apparatus
D 1669 Practice for Preparation of Test Panels for Acceler-
5.1 The enclosed carbon-arc apparatus used shall conform
ated and Outdoor Weathering of Bituminous Coatings
to the requirements defined in Practices G 151 and G 153.
D 1670 Test Method for Failure End Point in Accelerated
5.2 Unless otherwise specified, the spectral power distribu-
and Outdoor Weathering of Bituminous Materials
tion of the enclosed carbon-arc shall conform to the require-
G 113 Terminology Relating to Natural and Artificial
ments in Practice G 153 for enclosed carbon-arc with borosili-
Weathering Tests of Nonmetallic Materials
cate glass globes.
G 141 Guide for Addressing Variability in Exposure Testing
of Nonmetallic Metals
6. Test Specimens
G 147 Practice for Conditioning and Handling of Nonme-
6.1 Unless otherwise agreed upon, test specimens shall be
tallic Materials for Natural and Artificial Weathering Tests
3 7
approximately 70 by 150 mm (2 ⁄4by 5 ⁄8 in.). Bituminous
G 151 Practice for Exposing Nonmetallic Materials in Ac-
materials shall be applied as uniform coatings on aluminum
celerated Test Devices That Use Laboratory Light
panels in accordance with Practice D 1669. Fabricated materi-
Sources
als such as bituminous roofing, shingles, and similar products
shall be cut to size and their weather surfaces exposed. If these
1 are too flexible to sustain their own weight in a vertical
This practice is under the jurisdiction of ASTM Committee D08 on Roofing,
position, they may be mounted on aluminum panels.
Waterproofing, and Bituminous Materials and is the direct responsibility of
Subcommittee D08.02 on Prepared Roofings, Shingles, and Siding Materials.
6.1.1 At least two test specimens of each material shall be
Current edition approved Jan. 10, 2000. Published March 2000. Originally
exposed.
published as D 529 – 39 T. Last previous edition D 529 – 92 (1996).
6.1.2 Other test specimen sizes may be used to provide
Annual Book of ASTM Standards, Vol 04.04.
Annual Book of ASTM Standards, Vol 14.04. sufficient material for post-exposure testing when desired.
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D 529
6.2 Unless otherwise specified, expose at least three repli- 7.7.2 Follow the requirements for water purity described in
cate specimens of each test and control material. Practice G 151.
6.3 Follow the procedures described in Practice G 147 for 7.7.3 If specimens are found to have deposits or stains after
identification, conditioning, and handling of specimens of test, exposure in the apparatus, the water purity must be checked to
control, and reference materials prior to, during, and after determine if it meets the requirements of 7.7.2. On some
exposure. occasions, exposed specimens can be contaminated by deposits
6.4 Do not mask the face of a specimen for the purpose of from bacteria that can grow in the purified water used for
showing on one panel the effects of various exposure times. specimen spray. If bacterial contamination is detected, the
Misleading results may be obtained by this method, since the entire system used for specimen water spray must be flushed
masked portion of the specimens is still exposed to temperature with chlorine and thoroughly rinsed prior to resuming expo-
and humidity cycles that in many cases will affect results. sures.
7.7.4 The temperature of water used for specimen spray
7. Procedure
shall be 7.2 6 3°C (45 6 5°F).
7.7.5 When the water purity requirements above are met and
7.1 Mount the test specimens vertically, and equidistant
there is disagreement between parties on the extent of problems
above and below the horizontal centre line of the source of
caused by stain or deposit, run referee tests in a
...
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