ASTM D1670-04

Standard Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials

SIGNIFICANCE AND USE
The extent of cracking or pitting of bituminous films is a measure of the extent of deterioration due to weathering. Failure due to cracking is more accurately determined electrically than visually.
Failure determined by this test method will depend not only on the characteristics of the bituminous material and the extent of weathering, but also on the film thickness, and the amount and type of mineral filler present.
Tests on a similar material of known weathering characteristics (a control) exposed at the same time as the test material is strongly recommended as a check on the validity of the test results.
SCOPE
1.1 This test method covers the use of a spark generating apparatus for determination of failure due to cracking of bituminous materials undergoing accelerated or outdoor weathering on electrically conductive backings.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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: 30-Apr-2004
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.02 - Steep Roofing Products and Assemblies

Relations

• Replaces: ASTM D1670-98(2003) - Standard Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
• Effective Date: 01-May-2004
• Replaced By: ASTM D1670/D1670M-04(2011)e1 - Standard Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
• Effective Date: 01-Jul-2011

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1670–04
Standard Test Method for
Failure End Point in Accelerated and Outdoor Weathering of
1
Bituminous Materials
This standard is issued under the fixed designation D1670; 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 copies are made of the front side of the paper on which the
spots caused by the sparks appear. The photographs are
1.1 This test method covers the use of a spark generating
covered with an acrylic grid and the number of squares
apparatus for determination of failure due to cracking of
containing the spark records are counted and reported. Spark-
bituminousmaterialsundergoingacceleratedoroutdoorweath-
ing in 26 or more grid squares is representative of failure.
ering on electrically conductive backings.
1.2 The values stated in SI units are to be regarded as the
4. Significance and Use
standard. The values given in parentheses are for information
4.1 The extent of cracking or pitting of bituminous films is
only.
a measure of the extent of deterioration due to weathering.
1.3 This standard does not purport to address all of the
Failure due to cracking is more accurately determined electri-
safety concerns, if any, associated with its use. It is the
cally than visually.
responsibility of the user of this standard to establish appro-
4.2 Failure determined by this test method will depend not
priate safety and health practices and determine the applica-
only on the characteristics of the bituminous material and the
bility of regulatory limitations prior to use.
extent of weathering, but also on the film thickness, and the
2. Referenced Documents amount and type of mineral filler present.
2
4.3 Tests on a similar material of known weathering char-
2.1 ASTM Standards:
acteristics (a control) exposed at the same time as the test
D529 Practice for Enclosed Carbon-Arc Exposures of Bi-
material is strongly recommended as a check on the validity of
tuminous Materials
the test results.
D1435 Practice for Outdoor Weathering of Plastics
D1669 Practice for Preparation of Test Panels for Acceler-
5. Apparatus
ated and Outdoor Weathering of Bituminous Coatings
3
5.1 Any Spark-Generating Apparatus —Fig. 1 is an ex-
D4798 Practice forAccelerated Weathering Test Conditions
ample of an acceptable configuration for the test feeler. Other
and Procedures for Bituminous Materials (Xenon-Arc
configurations are not prohibited, subject to the following
Method)
conditions:
D4799 Practice forAccelerated Weathering Test Conditions
5.1.1 The cross-dimension of the wire loop is to be 50 6 5
andProceduresforBituminousMaterials(FluorescentUV,
3 1
mm (1 ⁄4 6 ⁄8 in.).
Water Spray, and Condensation Method)
5.1.2 The device is capable of delivering a 5-kV peak
3. Summary of Test Method voltage and of operating at 60 Hz.
5.2 Photographic Equipment—A supply of sheets of matte
3.1 Dry, weathered, bituminous-coated test panels are
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surface, regular weight, photocopy paper or linagraphic paper
grounded and a feeler electrode is passed over the back of a
cut to the dimensions of the test panel, developer, and fixing
linagraphicorultrahighsensitivitythermalfaxpaperplacedon
chemicals.
the bituminous surface with the emulsion side down. Photo-
5.3 Counting Grid, as shown in Fig. 2. Photocopy the grid
on a transparency film that is suitable for use with plain paper
1
This test method is under the jurisdiction ofASTM Committee D08 on Roofing
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and Waterproofing and is the direct responsibility of Subcommittee D08.02 on The sole source of supply of the apparatus known to the committee at this time
Prepared Roofings, Shingles, and Siding Materials. is Electrotechnic Model BD-40B Spark Generator, available from Electro-Technic
Current edition approved May 1, 2004. Published May 2004. Originally Products Co., 4642 N. Ravenswood Ave., Chicago, IL 60642. If you are aware of
approved in 1959. Last previous edition approved in 2003 as D1670 – 98 (2003). alternative suppliers, please provide this information to ASTM Headquarters. Your
DOI: 10.1520/D1670-04. comments will receive careful consideration at a meeting of the responsible
2
1
For referenced ASTM standards, visit the ASTM website, www.astm.org, or technical committee, which you may attend.
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Thermal facsimile paper with ultra-high sensitivity rating has also been found
Standards volume information, refer to the standard’s Document Summary page on satisfactory for the same purpose. This paper is available nationwide from office
the ASTM website. supply stores or catalogs.
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