1.1 本规程涵盖了沥青粘合剂的调节，以通过加压空气和高温模拟加速老化（氧化）。这旨在模拟在役氧化老化期间沥青粘合剂中发生的流变学变化，但可能无法准确模拟老化的相对速率。通常用于测试方法中的残留物 D2872 （RTFOT），设计用于模拟工厂老化。 注1: 尚未验证含有颗粒材料的材料的PAV调节。 1.2 沥青粘合剂在使用过程中的老化受环境温度和混合料相关变量的影响，例如混合料的体积比例、混合料的渗透性、骨料的性质以及可能的其他因素。 该调节过程旨在评估不同沥青粘合剂在选定的高温高压下的相对抗氧化老化能力，但不能考虑混合料变量，也不能提供在使用条件下的相对抗氧化老化能力。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求 注2: 本标准产生的结果质量取决于执行程序的人员的能力以及所用设备的能力、校准和维护。 符合规范标准的机构 D3666 通常认为能够胜任和客观的测试、抽样、检查等。本标准的用户应注意遵守规范 D3666 单独使用并不能完全确保可靠的结果。可靠的结果取决于许多因素；遵循规范建议 D3666 或一些类似的可接受指南提供了评估和控制其中一些因素的方法。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本规程旨在模拟沥青粘合剂在路面使用期间发生的在用氧化老化。这种处理方法的残留物可用于估计沥青粘合剂在现场使用数年后的物理或化学性质。 5.2 使用本规程调节的粘合剂通常用于根据规范确定规范属性 D6373 或AASHTO M 320。 5.3 对于不同等级或不同来源的沥青结合料，此调节实践中的时间和温度与在用路面年龄和温度之间没有唯一的相关性。因此，对于给定的一组在用气候条件，不可能选择一个单独的PAV调节时间、温度和压力来预测在特定的一组在用暴露条件后沥青粘合剂的性能或性能的相对排名。 5.4 不同沥青粘合剂的相对硬化程度随PAV中的调节温度和压力而变化。因此，两种沥青粘合剂在一种温度和压力条件下的老化速率相似，但在另一种条件下的老化速率不同。 因此，一组沥青在PAV条件下的相对老化速率可能与较低路面温度和环境压力下的实际在用相对速率显著不同。

1.1 This practice covers the conditioning of asphalt binders to simulate accelerated aging (oxidation) by means of pressurized air and elevated temperature. This is intended to simulate the changes in rheology which occur in asphalt binders during in-service oxidative aging, but may not accurately simulate the relative rates of aging. It is normally intended for use with residue from Test Method D2872 (RTFOT), which is designed to simulate plant aging. Note 1: PAV conditioning has not been validated for materials containing particulate materials. 1.2 The aging of asphalt binders during service is affected by ambient temperature and by mixture-associated variables, such as the volumetric proportions of the mix, the permeability of the mix, properties of the aggregates, and possibly other factors. This conditioning process is intended to provide an evaluation of the relative resistance of different asphalt binders to oxidative aging at selected elevated aging temperatures and pressures, but cannot account for mixture variables or provide the relative resistance to aging at in-service conditions. 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 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard Note 2: The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors. 1.5 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. 1.6 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. ====== Significance And Use ====== 5.1 This practice is designed to simulate the in-service oxidative aging that occurs in asphalt binders during pavement service. Residue from this conditioning practice may be used to estimate the physical or chemical properties of asphalt binders after several years of in-service aging in the field. 5.2 Binders conditioned using this practice are normally used to determine specification properties in accordance with Specification D6373 or AASHTO M 320. 5.3 For asphalt binders of different grades or from different sources, there is no unique correlation between the time and temperature in this conditioning practice and in-service pavement age and temperature. Therefore, for a given set of in-service climatic conditions, it is not possible to select a single PAV conditioning time, temperature, and pressure that will predict the properties or the relative rankings of the properties of asphalt binders after a specific set of in-service exposure conditions. 5.4 The relative degree of hardening of different asphalt binders varies with conditioning temperatures and pressures in the PAV. Therefore, two asphalt binders may age at a similar rate at one condition of temperature and pressure, but age differently at another condition. Hence, the relative rates of aging for a set of asphalts at PAV conditions may differ significantly from the actual in-service relative rates at lower pavement temperatures and ambient pressures.