ASTM D4798-04

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 of geographical climatic variations, local weather variation from normal, and local pollutants. This weathering apparatus and procedure are used for comparing the weathering characteristics of bituminous materials against a reference material for which the outdoor weathering characteristics are known. Guide G 141 provides guidance regarding this issue.
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 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: 31-Oct-2004
• 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 D4798-01 - Standard Test Method for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
• Effective Date: 01-Nov-2004
• Replaced By: ASTM D4798-08 - Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)
• Effective Date: 01-Feb-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4798–04
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; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope G155 Practice for Operating Xenon Arc Light Apparatus
for Exposure of Nonmetallic Materials
1.1 This practice covers test conditions and procedures for
xenon-arc exposures according to Practices G151 and G155
3. Summary of Test Method
for bituminous roofing and waterproofing materials that have a
3.1 Thin films of bitumen are uniformly applied to alumi-
minimum softening point of approximately 95°C (200°F) as
num panels. Shingles and similar products are cut to size and
determined by Test Method D36. (Also see Terminology
exposed to specified cycles of temperature, light, and water.A
G113.)
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
2 whichtheoutdoorweatheringcharacteristicsareknown.Guide
2.1 ASTM Standards:
G141 provides guidance regarding this issue.
D36 Test Method for Softening Point of Bitumen (Ring-
and-Ball Apparatus)
5. Apparatus
D1669 Practice for Preparation of Test Panels forAcceler-
5.1 The xenon-arc apparatus used shall conform to the
ated and Outdoor Weathering of Bituminous Coatings
requirements defined in Practices G151 and G155.
D1670 Test Method for Failure End Point in Accelerated
5.2 Filters—Daylight filter as described in Practice G155.
and Outdoor Weathering of Bituminous Materials
5.3 Radiometer—The use of a radiometer to monitor and
G 113 Terminology Relating to Natural and Artificial
control the amount of radiant energy received at the specimen
Weathering Tests of Nonmetallic Materials
is required. The use of the radiometer shall comply with the
G141 GuideforAddressingVariabilityinExposureTesting
requirements in Practice G151.
on Nonmetallic Materials
G147 Practice for Conditioning and Handling of Nonme-
6. Test Specimens
tallic Materials for Natural andArtificial Weathering Tests
6.1 Unless otherwise agreed upon, test specimens shall be
G151 Practice for Exposing Nonmetallic Materials in Ac-
3 7
approximately 70 by 150 mm (2 ⁄4 by 5 ⁄8 in.). Bituminous
celerated Test Devices that Use Laboratory Light Sources
materials shall be applied as uniform coatings on aluminum
panels in accordance with Practice D1669. Fabricated materi-
als such as bituminous roofing, shingles, and similar products
1
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
shall be cut to size and their weather surfaces exposed. If these
Waterproofing and is the direct responsibility of Subcommittee D08.02 on Prepared
are too flexible to sustain their own weight in a vertical
Roofings, Shingles, and Siding Materials.
position, they may be mounted on aluminum panels.
Current edition approved Nov. 1, 2004. Published November 2004. Originally
approved in 1988. Last previous edition approved in 2001 as D4798–01.
6.1.1 Unless otherwise specified, expose at least three rep-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
licate specimens of each test and control material.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1.2 Other test specimen sizes may be used to provide
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. sufficient material for postexposure testing when desired.
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D4798–04
6.1.3 Follow the procedures described in Practice G147 for of the test procedure should take only sufficient time to allo
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