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ASTM D5721-2008 聚烯烃土工薄膜在热风炉中老化的标准实施规程

ASTM D5721-2008 聚烯烃土工薄膜在热风炉中老化的标准实施规程

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【英文标准名称】: Standard Practice for Air-Oven Aging of Polyolefin Geomembranes
【原文标准名称】: 聚烯烃土工薄膜在热风炉中老化的标准实施规程
【标准号】: ASTM D5721-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D35.02
【标准类型】: (Practice)
【标准水平】: ()
【中文主题词】:
【英文主题词】: geomembrane; oven aging; polyolefin; Air-oven aging/testing; Geomembranes; Oven aging; Polyolefin (PO)
【摘要】: 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. 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. The rate of change of a particular property as a function of temperature may be evaluated using the temperatures and times outlined in Practice D 3045. 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. 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 and health practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: W59
【国际标准分类号】: 83_080_20
【页数】: 3P.;A4
【正文语种】: 英语

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