1.1 本试验方法包括用于侵蚀控制的岩石或人造材料的快速比重的测定。 1.2 该程序旨在现场执行，例如采石场、工地等，因此缺乏实验室方法的准确性， D6473/D6473米 有例如，不需要测量水的温度或计算水的密度，如 D6473/D6473米 . 1.3 单位-- 以国际单位制或英寸磅单位表示的数值应单独视为标准。 每个系统中规定的值不一定是完全相等的；因此，为了确保符合标准，每个系统应独立使用，并且不得将两个系统的值组合使用。 1.4 本标准的文本是指提供解释性材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应被视为本标准的要求。 1.5 所有观测值和计算值应符合实践中制定的有效数字和四舍五入指南 D6026 ，除非被本标准取代。 1.5.1 为了将测量或计算值与规定限值进行比较，测量或计算的值应四舍五入至规定限值中最接近的小数或有效数字。 1.5.2 本标准中用于规定如何收集/记录或计算数据的程序被视为行业标准。此外，它们代表了通常应保留的有效数字。所使用的程序不考虑材料变化、获取数据的目的、特殊目的研究或用户目标的任何考虑因素； 并且通常的做法是增加或减少报告数据的有效位数以与这些考虑相称。考虑工程设计分析方法中使用的有效数字超出了本标准的范围。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.7 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====== 5.1 抛石和护面材料由放置在施工项目、海岸线、河床、桥台、桩和其他结构上的天然岩石或人造材料组成，以最大限度地减少侵蚀的影响。 岩石或人造材料抵抗风化变质的能力影响项目的有效性及其成本。比重和吸收提供了有用的信息，可用于评估岩石或人造材料的可能退化。 5.2 与拟议设计尺寸相等的试样将提供实验室试验与实际现场性能之间的最佳相关性；然而，这通常既不实用，也不经济可行。 5.3 该试验方法已用于评估不同类型的岩石和人造材料。 很少有测试结果提供的数据与实际现场条件下岩石或人造材料的耐久性不一致。 注1: 比重是一种指标性质，是潜在质量（耐久性）的指标。其他特征，如粘土矿物学、结晶强度、孔隙（空隙）空间和大小、缝合岩、燧石带和结核，以及其他微观和宏观特征，可能会更大程度地影响颗粒对环境恶化的抵抗力。 5.4 本试验的结果不能作为确定耐久性的唯一依据，而应与其他试验的结果一起使用。 注2: 本标准产生的结果的质量取决于执行该标准的人员的能力以及所用设备和设施的适用性。符合实践标准的机构 D3740 通常被认为能够胜任和客观的测试/取样/检查。可靠的结果取决于许多因素；实践 D3740 提供了一种评估其中一些但不是全部因素的方法。

1.1 This test method covers the determination of the rapid specific gravity of rock or man-made materials for erosion control. 1.2 This procedure is intended to be performed in the field, for example, quarry, work site, etc., and as such lacks the accuracy that laboratory method, D6473/D6473M has. For example, there is no requirement for measuring temperature of the water or calculation of the density of water as is required in D6473/D6473M . 1.3 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard. 1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 , unless superseded by this standard. 1.5.1 For purposes of comparing measured or calculated value(s) with specified limits, the measured or calculated value(s) shall be rounded to the nearest decimal or significant digits in the specified limits. 1.5.2 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. 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 ====== 5.1 Riprap and armor material are composed of pieces of natural rock or manmade material that are placed on construction projects, shorelines, streambeds, bridge abutments, pilings and other structures to minimize the effects of erosion. The ability of rock or manmade material to withstand deterioration from weathering affects both the effectiveness of the project and its cost. The specific gravity and absorption provide useful information that can be used in evaluating possible deterioration of rock or manmade material. 5.2 Test specimens equal in size to the proposed design size would provide the best correlations between laboratory tests and actual field performance; however, this is usually neither practical nor economically feasible. 5.3 This test method has been used to evaluate different types of rocks and manmade material. There have been rare occasions when test results have provided data that have not agreed with the durability of rock or manmade material under actual field conditions. Note 1: Specific gravity is an index property that is an indicator of potential quality (durability). Other features, such as clay mineralogy, crystalline strength, pore (void) spaces and sizes, stylolites, chert bands and nodules, and other micro and macro features may more greatly influence a particles resistance to deterioration in the environment. 5.4 The results of this test is not to be used as the sole basis for determination of durability, but should be used in conjunction with the results of other tests. Note 2: The quality of the result produced by this standard is dependent upon the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some, but not all, of those factors.