ASTM D5683/D5683M-95(2022)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5683/D5683M −95 (Reapproved 2022)
Standard Test Method for
Flexibility of Roofing and Waterproofing Materials and
Membranes
This standard is issued under the fixed designation D5683/D5683M; 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 4. Summary of Test Method
4.1 Bend the five specimens of roofing or waterproofing
1.1 This test method measures the flexibility of roofing or
sheet materials or membrane, conditioned at 4.4 °C [40 °F]
waterproofing sheet materials or membranes by bending the
(see Note 1), over a block (see Fig. 1) designed to provide arcs
test material over a block containing arcs of specific radii at a
1 1
of equal length with 6 mm [ ⁄4 in.], 13 mm [ ⁄2 in.], 19 mm
standard temperature.
[ ⁄4 in.], and 25 mm [1 in.] radii, and the smallest radius is
1.2 The values stated in either SI units or inch-pound units
reported where cracking is not observed in any specimen.
are to be regarded separately as standard. The values stated in
NOTE 1—Other test temperatures may be used in addition to the tests
each system may not be exact equivalents; therefore, each
required at 4.4 °C [40 °F], and refrigerated conditioning chambers may be
system shall be used independently of the other. Combining
used instead of the water bath specified. Follow procedures outlined in
values from the two systems may result in nonconformance
Section 8 if refrigerated chamber is utilized; however, the plastic bag may
with the standard.
be omitted.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 This test method is designed to aid those interested in
responsibility of the user of this standard to establish appro-
the engineering properties of roofing and waterproofing sheet
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. materials and membranes.
1.4 This international standard was developed in accor-
5.2 This test method enables a researcher to measure the
dance with internationally recognized principles on standard-
relative flexibility of roofing and waterproofing sheet materials
ization established in the Decision on Principles for the
and membranes under standard conditions in the laboratory.
Development of International Standards, Guides and Recom-
5.3 The data obtained from this test method will not permit
mendations issued by the World Trade Organization Technical
prediction of the service life of a membrane. Membrane
Barriers to Trade (TBT) Committee.
flexibility is important during application, and changes in
flexibility are believed to be linked to the performance of
2. Referenced Documents
roofing and waterproofing membranes, but the actual link
2.1 ASTM Standards: between test data and performance is unknown and is depen-
dent on the materials and exposure.
D1079 Terminology Relating to Roofing and Waterproofing
6. Apparatus
3. Terminology
6.1 Water Bath—A bath with the capacity of at least 10 L
3.1 For definitions of terms used in this test method, refer to
[2.5 gal] and capable of maintaining a temperature of 4.4 6
Terminology D1079.
0.1 °C [40 6 0.2 °F].
6.2 Polyethylene Bags—A sealable plastic bag for condi-
tioning each group of test specimens. Commercial 1 gal
This test method is under the jurisdiction ofASTM Committee D08 on Roofing
sealable polyethylene scrap or food storage bags can perform
and Waterproofing and is the direct responsibility of Subcommittee D08.20 on
Roofing Membrane Systems.
this function.
Current edition approved Nov. 1, 2022. Published November 2022. Originally
6.3 Test Block—The test block (see Fig. 1) may be made
approved in 1995. Last previous edition approved in 2017 as D5683/D5683M – 95
(2017). DOI: 10.1520/D5683_D5683M-95R22.
from any hard, durable material that conforms to the dimen-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
sions shown in Fig. 1. It is designe
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