1.1 本试验方法涵盖了评估碾压侵蚀控制产品（RECP）保护山坡免受降雨侵蚀能力的指南、要求和程序。这种保护的关键要素是RECP能够: 1.1.1 吸收雨滴的冲击力，从而通过“飞溅”机制减少土壤颗粒松动； 1.1.2 减缓径流并鼓励渗透，从而减少土壤颗粒通过“地表流”机制的位移和运输； 1.1.3 吸收地表水流的剪切力；和 1.1.4 将土壤颗粒困在下面。 1.2 该测试方法采用全尺寸测试程序，而不是缩尺（台架规模）模拟，并在土方工程作业结束时，但在植被恢复工作开始之前，在施工现场发现的典型条件后进行模式化。因此，这只考虑未种植的条件。 1.3 本试验方法提供了受控和记录条件下RECP与基线裸土条件的比较评估。 1.4 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸的数学转换- 磅单位，仅供参考，不被视为标准单位。 1.5 所有观察值和计算值应符合实践中确定的有效数字和舍入准则 D6026 ，除非被本标准取代。 1.5.1 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。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； 通常的做法是增加或减少报告数据的有效位数，以与这些考虑因素相称。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。 此外，用户在使用测试方法时必须遵守普遍的监管规范，如OSHA（职业健康安全管理局）指南。 1.7 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 本试验方法评估RECP及其安装方式，以: 5.1.1 在不同降雨强度和土壤类型的情况下，减少雨水径流中的土壤流失和泥沙浓度； 5.1.2 通过减少悬浮固体，改善受土方工程活动干扰区域的水质。 5.2 本试验方法对涉及土方工程活动的施工现场的典型条件进行建模和检查，包括:公路和道路；机场；住宅、商业和工业发展；管道、矿山和垃圾填埋场；高尔夫球场；等 5.3 该测试方法是一种性能测试，但可用于质量控制，以确定产品是否符合项目规范。由于有关实验室特定精度的信息不完整，建议谨慎。对于项目特定合规性，应考虑独特的项目特定条件。 注1: 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 通常认为能够胜任和客观的测试/采样/检查等。本标准的用户应注意遵守惯例 D3740 本身不能保证可靠的结果。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因素的方法。

1.1 This test method covers the guidelines, requirements and procedures for evaluating the ability of Rolled Erosion Control Products (RECPs) to protect hillslopes from rainfall-induced erosion. Critical elements of this protection are the ability of the RECP to: 1.1.1 Absorb the impact force of raindrops, thereby reducing soil particle loosening through “splash” mechanisms; 1.1.2 Slow runoff and encourage infiltration, thereby reducing soil particle displacement and transport through “overland flow” mechanisms; 1.1.3 Absorb shear forces of overland flow; and, 1.1.4 Trap soil particles beneath. 1.2 This test method utilizes full-scale testing procedures, rather than reduced-scale (bench-scale) simulation, and is patterned after conditions typically found on construction sites at the conclusion of earthwork operations, but prior to the start of revegetation work. Therefore this considers only unvegetated conditions. 1.3 This test method provides a comparative evaluation of an RECP-to baseline bare soil conditions under controlled and documented conditions. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units, which are provided for information only and are not considered 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 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. Also, the user must comply with prevalent regulatory codes, such as OSHA (Occupational Health and Safety Administration) guidelines, while using the test method. 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 This test method evaluates RECPs and their means of installation to: 5.1.1 Reduce soil loss and sediment concentrations in stormwater runoff under conditions of varying rainfall intensity and soil type, and; 5.1.2 Improve water quality exiting the area disturbed by earthwork activity by reducing suspended solids. 5.2 This test method models and examines conditions typically found on construction sites involving earthwork activities including: highway and roads; airports; residential, commercial and industrial developments; pipelines, mines, and landfills; golf courses; etc. 5.3 This test method is a performance test, but can be used for quality control to determine product conformance to project specifications. Caution is advised since information regarding laboratory specific precision is incomplete. For project specific conformance, unique project-specific conditions should be taken into consideration. Note 1: The quality of the result produced by this standard is dependent on 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/inspections/etc. Users of this standard are cautioned that compliance with Practice D3740 does not itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.