1.1 本规程应用于定性测定特立尼达湖沥青中的特立尼达湖沥青——从生产混合物或沥青铺路混合料中回收的粘合剂中获得的改性沥青水泥。 1.2 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 1.3 此做法仅限于根据规范生产的沥青粘合剂 D5710/D5710M . 1.4 警告-- 汞已被美国环境保护局和许多州机构指定为可导致中枢神经系统、肾脏和肝脏损伤的危险物质。汞或其蒸气可能对健康有害，并对材料具有腐蚀性。 处理汞和含汞产品时应小心。详情请参阅适用的材料安全数据表（MSDS）和美国环保署的网站--http://www.epa.gov/mercury/index.htm--获取更多信息。用户应该知道，州法律可能禁止向您的州销售汞和/或含汞产品。 1.5 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。 1.6 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。 1.7 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====== 4.1 沥青含有硫化合物，其中大部分在精炼过程中被去除；所得沥青还含有硫化合物，在230°C以上的温度下会释放出来。特立尼达湖改性沥青含有硫化合物，在170°C至230°C的较低温度下释放。特立尼达湖改性沥青中硫的释放会使铜带失去光泽，似乎与总TLA含量直接相关。 铜带试验旨在评估沥青中TLA的定性存在。 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。

1.1 This practice shall be used for the qualitative determination of Trinidad Lake Asphalt in Trinidad Lake Modified Asphalt Cements obtained from production blends or recovered binder from asphalt paving mixtures. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This practice is limited to asphalt binders which are produced in accordance with Specification D5710/D5710M . 1.4 Warning— Mercury has been designated by the United States Environmental Protection Agency and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable Material Safety Data Sheet (MSDS) for details and EPA’s website—http://www.epa.gov/mercury/index.htm—for additional information. Users should be aware that selling mercury and/or mercury-containing products into your state may be prohibited by state law. 1.5 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. 1.6 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. 1.7 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 ====== 4.1 Asphalt contains sulfur compounds, most of which are removed during refining; the resulting asphalt also contains sulfur compounds which are released at the temperatures above 230 °C. Trinidad Lake Modified Asphalt contains sulfur compounds which are released at lower temperatures between 170 °C and 230 °C. The release of sulfur from Trinidad Lake Modified Asphalt tarnishes the copper strip and appears to be related directly to the total TLA content. The copper strip test is designed to assess the qualitative presence of TLA in asphalt. 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.