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Significance and Use
4.1 Under the severe conditions of this test, the specimens undergo degradation at a rate that is a function of the thermal endurance of the geomembrane under examination.
4.2 The elevated temperature for this practice should represent conditions that are sufficiently severe to induce failure of polyolefin geomembranes within an abbreviated period of time.
4.3 The rate of change of a particular property as a function of temperature may be evaluated using the temperatures and times outlined in Practice .
4.4 Any correlation between this practice and natural life of these materials must be determined for the particular application in which the materials are to be used.
4.5 Air-oven aging can be used to evaluate and compare the performance of various heat stabilizer packages.
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 standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D746 Test Method for Brittleness Temperature of Plastics and Elastomers by Impact
D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1525 Test Method for Vicat Softening Temperature of Plastics
D1790 Test Method for Brittleness Temperature of Plastic Sheeting by Impact
D1870 Practice for Elevated Temperature Aging Using a Tubular Oven
D3045 Practice for Heat Aging of Plastics Without Load
D4439 Terminology for Geosynthetics
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
F412 Terminology Relating to Plastic Piping Systems
ICS Number Code 83.080.20 (Thermoplastic materials)
UNSPSC Code 30121701(Geomesh)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D5721-08(2018), Standard Practice for Air-Oven Aging of Polyolefin Geomembranes, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top