ASTM D1670/D1670M-04(2011)e1
(Test Method)Standard Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials
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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
´1
Designation:D1670/D1670M–04 (Reapproved 2011)
Standard Test Method for
Failure End Point in Accelerated and Outdoor Weathering of
Bituminous Materials
This standard is issued under the fixed designation D1670/D1670M; 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.
´ NOTE—Units information was editorially revised in July 2011.
1. Scope Water Spray, and Condensation Method)
1.1 This test method covers the use of a spark generating
3. Summary of Test Method
apparatus for determination of failure due to cracking of
3.1 Dry, weathered, bituminous-coated test panels are
bituminousmaterialsundergoingacceleratedoroutdoorweath-
grounded and a feeler electrode is passed over the back of a
ering on electrically conductive backings.
linagraphicorultrahighsensitivitythermalfaxpaperplacedon
1.2 The values stated in either SI units or inch-pound units
the bituminous surface with the emulsion side down. Photo-
are to be regarded separately as standard. The values stated in
copies are made of the front side of the paper on which the
each system may not be exact equivalents; therefore, each
spots caused by the sparks appear. The photographs are
system shall be used independently of the other. Combining
covered with an acrylic grid and the number of squares
values from the two systems may result in non-conformance
containing the spark records are counted and reported. Spark-
with the standard.
ing in 26 or more grid squares is representative of failure.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 The extent of cracking or pitting of bituminous films is
priate safety and health practices and determine the applica-
a measure of the extent of deterioration due to weathering.
bility of regulatory limitations prior to use.
Failure due to cracking is more accurately determined electri-
cally than visually.
2. Referenced Documents
2 4.2 Failure determined by this test method will depend not
2.1 ASTM Standards:
only on the characteristics of the bituminous material and the
D529 Practice for Enclosed Carbon-Arc Exposures of Bi-
extent of weathering, but also on the film thickness, and the
tuminous Materials
amount and type of mineral filler present.
D1435 Practice for Outdoor Weathering of Plastics
4.3 Tests on a similar material of known weathering char-
D1669 Practice for Preparation of Test Panels for Acceler-
acteristics (a control) exposed at the same time as the test
ated and Outdoor Weathering of Bituminous Coatings
material is strongly recommended as a check on the validity of
D4798 Practice forAccelerated Weathering Test Conditions
the test results.
and Procedures for Bituminous Materials (Xenon-Arc
Method)
5. Apparatus
D4799 Practice forAccelerated Weathering Test Conditions
5.1 Any Spark-Generating Apparatus —Fig. 1 is an ex-
and Procedures for Bituminous Materials (Fluorescent UV,
ample of an acceptable configuration for the test feeler. Other
configurations are not prohibited, subject to the following
This test method is under the jurisdiction ofASTM Committee D08 on Roofing
conditions:
andWaterproofingandisthedirectresponsibilityofSubcommitteeD08.02onSteep
Roofing Products and Assemblies.
Current edition approved July 1, 2011. Published July 2011. Originally approved
in 1959. Last previous edition approved in 2004 as D1670 – 04. DOI: 10.1520/ The sole source of supply of the apparatus known to the committee at this time
D1670_D1670M-04R11E01. is Electrotechnic Model BD-40B Spark Generator, available from Electro-Technic
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Products Co., 4642 N. Ravenswood Ave., Chicago, IL 60642. If you are aware of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM alternative suppliers, please provide this information to ASTM Headquarters. Your
Standards volume information, refer to the standard’s Document Summary page on comments will receive careful consideration at a meeting of the responsible
the ASTM website. technical committee, which you may attend.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
´1
D1670/D1670M–04 (2011)
FIG. 1 Feeler
5.1.1 The cross-dimension of the wire loop is to be 50 6 5
3 1
mm [1 ⁄4 6 ⁄8 in.].
5.1.2 The device is capable of delivering a 5-kV peak
voltage and of operating at 60 Hz.
FIG. 2 Counting Grid
5.2 Photographic Equipment—A supply of sheets of matte
surface, regular weight, photocopy paper or linagraphic paper
8. Procedures for Weathering
cut to the dimensions of the test panel, developer, and fixing
chemicals. 8.1 Outdoor Weathering—Expose specimens to outdoor
5.3 Counting Grid, as shown in Fig. 2. Photocopy the grid weathering in accordance with requirements of Practice D1435
on a transparency film that is suitable for use with plain paper at a site, rack angle and backing to be agreed on by the
copiers. Trim the outside edges to the exact dimensions of the interested parties.
test panel making sure that the grid and the bituminous film on 8.2 Laboratory Accelerated Weathering—Expose speci-
the test panel are aligned. mens to laboratory accelerated weathering in accordance with
3 7
procedures described in Practice D529, D4798,or D4799. The
Outside dimensions, mm [in.] 69.8 by 149.1 [2 ⁄4 by 5 ⁄8] or panel size
7 7
Grid dimensions, mm [in.] 47.6 by 123.8 [1 ⁄8 by 4 ⁄8]
practice used and the specific test condition selected from the
Number of squares in grid 260 (10 by 26)
practice shall be by agreement between the interested parties.
Size of squares, mm [in.] 4.76 [ ⁄16]
8.
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