1.1 本试验方法涵盖了通过电磁表面接触装置测量压实过程产生的电磁场变化来确定沥青路面混合料的现场密度和相对压实度的程序。 1.2 本方法中引用的设备是一种表面接触装置，必须适应铺路应用中通常遇到的表面湿度和温度变化范围。这可以通过设计参数来实现，这些参数可以降低设备对表面湿度和温度变化的敏感性，或者通过测量和算法来考虑轧制图案中的表面水分和温度变化。 1.3 以国际单位制或英寸-磅单位表示的值应单独视为标准值。每个系统中所述的值可能不是完全等效的；因此，每个系统都应独立使用。将两个系统的值结合起来可能会导致不符合标准。 1.4 本标准的文本引用了提供解释性材料的注释和脚注。这些注释和脚注（不包括表格和图表中的注释和脚注）不应被视为本标准的要求。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。 本标准的使用者有责任在使用前建立适当的安全、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》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 3.1 所述测试方法可作为一种快速、无损的技术，用于测定- 压实沥青混合料的密度或相对压实度。 3.2 该测试方法可用于确定适当的轧制力和模式，以达到所需的密度。 3.3 测试的非破坏性允许在辊子通道之间的单个测试位置或垫子上的多个位置进行重复测量，以监测密度的变化。 3.4 通过这种测试方法获得的密度结果是相对的。需要设备校准（与其他测试方法的相关性）将使用这种方法获得的结果转换为实际密度。第节 6. 该测试方法描述了一种已被证明可接受的相关性方法。 注1: 本标准产生的结果的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 通常认为能够进行合格和客观的测试、取样、检验等。本标准的使用者应注意遵守规范 D3666 单独使用并不能完全保证可靠的结果。可靠的结果取决于许多因素；遵循规范的建议 D3666 或者一些类似的可接受的指南提供了一种评估和控制其中一些因素的方法。 注2: 执行此测试所用的人员和设备可根据规范进行评估 D3666 . 注3: 对本试验方法中使用的设备进行了研究和评估。请参考Pedro Romero博士，P.E.，2002年7月的一项集合基金研究“非核仪器测量热拌沥青路面密度的评估”。

1.1 This test method covers the procedures for determining the in-place density and relative compaction of asphalt pavement mixtures by an electromagnetic surface contact device by measuring changes in the electromagnetic field resulting from the compaction process. 1.2 The equipment referenced in this method is a surface contact device, which must accommodate surface moisture and temperature variation in the range typically encountered in paving applications. This can be accomplished by design parameters that reduce the device’s sensitivity to surface moisture and temperature variation or by measurements and algorithms to account for surface moisture and temperature variance in the rolling pattern. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the 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. 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 ====== 3.1 The test method described is useful as a rapid, nondestructive technique for determining the in-place density or relative compaction of compacted asphalt mixtures. 3.2 The test method can be used to establish the proper rolling effort and pattern to achieve the required density. 3.3 The nondestructive nature of the test allows repetitive measurements to be made at a single test location between roller passes or at multiple locations across the mat to monitor changes in density. 3.4 The density results obtained by this test method are relative. Device calibration (correlation with other test methods) is required to convert the results obtained using this method to actual density. Section 6 of this test method describes a method that has proven to be acceptable for correlation. Note 1: 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. Note 2: The personnel and equipment used in performing this test can be evaluated in accordance with Specification D3666 . Note 3: Research and evaluation of devices used in this test method has been conducted. Reference is made to “Evaluation of Non-Nuclear Gauges to Measure Density of Hot-Mixed Asphalt Pavements,” a pooled fund study, Pedro Romero, Ph.D., P.E., July 2002.