ASTM D5721-95
(Practice)Standard Practice for Air-Oven Aging of Polyolefin Geomembranes
Standard Practice for Air-Oven Aging of Polyolefin Geomembranes
SCOPE
1.1 This practice covers a means for estimating the resistance of polyolefin geomembranes to thermal aging in the presence of air. Only the procedure for heat exposure is specified, not the test method or specimen. The effect of heat on any particular property may be determined by selection of the appropriate test method and specimen.
1.2 This practice should be used as a guide to compare thermal aging characteristics of materials as measured by the change in some property of interest. This practice does not predict thermal aging characteristics where interactions between stress, environment, temperature, and time control failure.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 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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Designation: D 5721 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Air-Oven Aging of Polyolefin Geomembranes
This standard is issued under the fixed designation D 5721; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1870 Practice for Elevated Temperature Aging Using a
Tubular Oven
1.1 This practice covers a means for estimating the resis-
D 3045 Practice for Heat Aging of Plastics Without Load
tance of polyolefin geomembranes to thermal aging in the
D 4439 Terminology for Geotextiles
presence of air. Only the procedure for heat exposure is
E 145 Specifications for Gravity—Convection and
specified, not the test method or specimen. The effect of heat
Forced—Ventilation Ovens
on any particular property may be determined by selection of
F 412 Terminology Relating to Plastic Piping Systems
the appropriate test method and specimen.
F 869 Definitions of Terms Relating to Athletic Shoes and
1.2 This practice should be used as a guide to compare
Biomechanics
thermal aging characteristics of materials as measured by the
change in some property of interest. This practice does not
3. Terminology
predict thermal aging characteristics where interactions be-
3.1 Definitions:
tween stress, environment, temperature, and time control
3.1.1 aging, n—the process of exposing materials to an
failure.
environment for an interval of time. (F 869)
1.3 The values stated in SI units are to be regarded as the
3.1.2 geomembrane, n—an essentially impermeable geo-
standard.
synthetic composed of one or more synthetic sheets.
1.4 This standard does not purport to address all of the
(D 4439)
safety concerns, if any, associated with its use. It is the
3.1.3 polyolefin, n—a polymer prepared by the polymeriza-
responsibility of the user of this standard to establish appro-
tion of an olefin(s) as the sole monomer(s). (F 412)
priate safety and health practices and determine the applica-
3.1.4 Vicat softening point—the temperature at which a
bility of regulatory limitations prior to use.
flat-ended needle of 1 mm circular cross section will penetrate
2. Referenced Documents a thermoplastic specimen to a depth of 1 mm under a specified
load using a selected uniform rate of temperature rise.
2.1 ASTM Standards:
(D 1525)
D 618 Practice for Conditioning Plastics and Electrical
Insulating Materials for Testing
4. Significance and Use
D 638 Test Method for Tensile Properties of Plastics
4.1 Under the severe conditions of this test, the specimens
D 746 Test Method for Brittleness Temperature of Plastics
2 undergo degradation at a rate that is a function of the thermal
and Elastomers by Impact
endurance of the geomembrane under examination.
D 1238 Test Method for Flow Rates of Thermoplastics by
2 4.2 The elevated temperature for this practice should repre-
Extrusion Plastometer
sent conditions that are sufficiently severe to induce failure of
D 1505 Test Method for Density of Plastics by Density-
2 polyolefin geomembranes within an abbreviated period of
Gradient Technique
time.
D 1525 Test Method for Vicat Softening Temperature of
2 4.3 The rate of change of a particular property as a function
Plastics
of temperature may be evaluated using the temperatures and
D 1790 Test Method for Brittleness Temperature of Plastic
2 times outlined in Practice D 3045.
Film by Impact
4.4 Any correlation between this practice and natural life of
D 1822 Test Method for Tensile-Impact Energy to Break
2 these materials must be determined for the particular applica-
Plastics and Electrical Insulating Materials
tion in which the materials are to be used.
1 3
This practice is under the jurisdiction of ASTM Committee D-35 on Geosyn- Annual Book of ASTM Standards, Vol 08.02.
thetics and is the direct responsibility of Subcommittee D35.02 on Endurance Annual Book of ASTM Standards, Vol 04.09.
Properties. Annual Book of ASTM Standards, Vol 14.02.
Current edition approved April 15, 1995. Published June 1995. Annual Book of ASTM Standards, Vol 08.04.
2 7
Annual Book of ASTM Standards, Vol 08.01. Annual Book of ASTM Standards, Vol 15.07.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
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