ASTM D2523-00

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Designation: D 2523 – 00
Standard Practice for
Testing Load-Strain Properties of Roofing Membranes
This standard is issued under the fixed designation D2523; 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 initial clear distance between clamps, or temperatures and
moisture contents are varied, the data may not be strictly
1.1 This practice is a guide for determining the load-strain
comparable.
properties of roofing membranes and their components at
various temperatures. Test specimens may be prepared in the
5. Sampling
laboratory or cut from samples obtained in the field.
5.1 Take field membrane sample at least 100 by 250 mm (4
1.2 The values stated in SI units are to be regarded as the
by 10 in.) in accordance with good roofing practices. In cases
standard. The inch-pound units given in parentheses are for
where field-applied aggregate is in place, remove it with a
information only.
scraper such as a heated putty knife.
1.3 This standard does not purport to address all of the
5.1.1 Samplethoseareasofthemembranethatareexpected
safety concerns, if any, associated with its use. It is the
to represent the extremes in load/strain characteristics.
responsibility of the user of this standard to establish appro-
5.1.2 At least one sample is required for each test tempera-
priate safety and health practices and determine the applica-
ture at which it is desired to determine load/strain properties.
bility of regulatory limitations prior to use.
5.2 Prepare laboratory samples at least 100 by 250 mm (4
2. Referenced Documents by 10 in.) in strict accordance with the roofing specification
being tested. Observe all cautions specified, such as not
2.1 ASTM Standards:
overheating the bitumen. Do not oven condition any of the
D95 Test Method for Water in Petroleum Products and
components or the final sample.
Bituminous Materials by Distillation
5.2.1 Select those areas of the membrane that are expected
D412 Test Methods for Vulcanized Rubber and Thermo-
to represent the extremes in load-strain characteristics. Pre-
plastic Rubbers and Thermoplastic Elastomers - Tension
pare at least one sample of each type for each proposed test
E178 Practice for Dealing with Outlying Observations
temperature. If there is any doubt about these areas, include all
3. Terminology
possible variations. The samples must be uniform in cross
section.
3.1 Definitions of Terms Specific to This Standard:
5.2.2 Select materials at random when possible. Compo-
3.1.1 roofing membrane—that part of the roofing system
nents should be conditioned at 50 6 5% relative humidity and
whoseprimaryfunctionistoexcludewater;itdoesnotinclude
25 6 2.5°C (77 6 4.5°F) for 24 h prior to constructing
field-applied aggregate.
samples.
4. Significance and Use
5.2.3 The quantity of material in any layer should be within
6 10%, and the entire sample should be within 6 5% of the
4.1 This practice is designed to aid those interested in the
quantities specified.
engineering properties of roofing membranes.
4.2 The data obtained will not permit prediction of the
6. Test Specimens
servicelifeofamembraneunderfieldconditions.Thedatawill
6.1 Condition the samples at room temperature at 50 65%
provide a basis for study of the mechanical properties of the
relative humidity for a minimum of 16 h for non-solvent-
membrane. Note that if strain rates, specimen dimensions,
containing membranes, and until constant mass has been
reached for solvent-containing membranes.
This practice is under the jurisdiction of ASTM Committee D08 on Roofing,
6.2 Die-cut three tension test specimens from each sample.
Waterproofing, and Bituminous Materials and is the direct responsibility of
Theshapeofthespecimensformembraneswithlessthan50%
Subcommittee D08.20 on Roofing Membrane Systems.
ultimate elongation is shown in Fig. 1. Where the membrane
Current edition approved Nov. 10, 2000. Published January 2001. Originally
e1
hasanultimateelongationgreaterthan50%,useDieCofTest
published as D2523 – 66 T. Last previous edition D 2523 – 78 (1995) .
Annual Book of ASTM Standards, Vol 05.01.
Methods D412.
Annual Book of ASTM Standards, Vol 09.01.
Annual Book of ASTM Standards, Vol 14.02.
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