ASTM D4798-01

Standard Test Method for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)

SCOPE
1.1 This test method covers test conditions and procedures for xenon-arc exposures according to Practice G151 and G155 for bituminous roofing and waterproofing materials having 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 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.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 75.140 - Waxes, bituminous materials and other petroleum products
• ICS: 91.100.50 - Binders. Sealing materials
• ICS: 93.080.20 - Road construction materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.02 - Steep Roofing Products and Assemblies

Relations

• Replaces: ASTM D4798-00 - Standard Test Method for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
• Effective Date: 10-Nov-2001
• Replaced By: ASTM D4798-04 - Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
• Effective Date: 01-Nov-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 4798 – 01
Standard Practice for
Accelerated Weathering Test Conditions and Procedures for
1
Bituminous Materials (Xenon-Arc Method)
This standard is issued under the fixed designation D 4798; 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 3. Summary of Test Method
1.1 This test method covers test conditions and procedures 3.1 Thin films of bitumen are uniformly applied to alumi-
for xenon-arc exposures according to Practices G 151 and num panels. Shingles and similar products are cut to size and
G 155 for bituminous roofing and waterproofing materials that exposed to specified cycles of temperature, light, and water. A
have a minimum softening point of approximately 95°C choice of two test cycles is given along with options for
(200°F) as determined by Test Method D 36. (Also see determining the period of exposure and evaluating results.
Terminology G 113.)
4. Significance and Use
1.2 The values stated in SI units are to be regarded as the
4.1 It is not possible to establish a precise correlation
standard. The values given in parentheses are for information
only. between accelerated and natural weathering because of geo-
graphical climatic variations, local weather variation from
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the normal, and local pollutants. This weathering apparatus and
procedure are used for comparing the weathering characteris-
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- tics of bituminous materials against a reference material for
which the outdoor weathering characteristics are known. Guide
bility of regulatory limitations prior to use.
G 141 provides guidance regarding this issue.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
D 36 Test Method for Softening Point of Bitumen (Ring- 5.1 The xenon-arc apparatus used shall conform to the
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and-Ball Apparatus) requirements defined in Practices G 151 and G 155.
5.2 Filters—Daylight filter as described in Practice G 155.
D 1669 Practice for Preparation of Test Panels for Acceler-
2
ated and Outdoor Weathering of Bituminous Coatings 5.3 Radiometer—The use of a radiometer to monitor and
control the amount of radiant energy received at the specimen
D 1670 Test Method for Failure End Point in Accelerated
2
and Outdoor Weathering of Bituminous Materials is required. The use of the radiometer shall comply with the
requirements in Practice G 151.
G 113 Terminology Relating to Natural and Artificial
3
Weathering Tests of Nonmetallic Materials
6. Test Specimens
G 141 Guide for Addressing Variability in Exposure Testing
3
6.1 Unless otherwise agreed upon, test specimens shall be
on Nonmetallic Materials
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approximately 70 by 150 mm (2 ⁄4 by 5 ⁄8 in.). Bituminous
G 147 Practice for Conditioning and Handling of Nonme-
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materials shall be applied as uniform coatings on aluminum
tallic Materials for Natural and Artificial Weathering Tests
panels in accordance with Practice D 1669. Fabricated materi-
G 151 Practice for Exposing Nonmetallic Materials in Ac-
3
als such as bituminous roofing, shingles, and similar products
celerated Test Devices that Use Laboratory Light Sources
shall be cut to size and their weather surfaces exposed. If these
G 155 Practice for Operating Xenon Arc Light Apparatus
3
are too flexible to sustain their own weight in a vertical
for Exposure of Nonmetallic Materials
position, they may be mounted on aluminum panels.
6.1.1 Unless otherwise specified, expose at least three rep-
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This test method is under the jurisdiction of ASTM Committee D08 on
licate specimens of each test and control material.
Roofing, Waterproofing, and Bituminous Materials and is the direct responsibility of
6.1.2 Other test specimen sizes may be used to provide
Subcommittee D08.02 on Prepared Roofings, Shingles, and Siding Materials.
sufficient material for postexposure testing when desired.
Current edition approved November 10, 2001. Published February 2002.
Originally published as D 4798 – 88. Last previous edition D 4798 – 00.
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Annual Book of ASTM Standards, Vol 04.04.
3
Annual Book of ASTM Standards, Vol 14.04.
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D 4798
6.1.3 Follow the procedures described in Practice G 147 for of the test procedure should take only sufficient time to allow
identification, conditioning, and handling of specimens of test, f
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