1.1 该试验方法包括测量穿透轧制侵蚀控制产品的光量。 1.2 本试验方法未提供可变正常阳光和土壤条件下RECP的光穿透值。该试验方法确定标称透光率。 1.3 该试验方法不用于确定RECP的地面覆盖百分比值，因为光穿透量可能包括穿过半透明材料或从表面反射的光。 1.4 以百分比表示的数值应视为标准。脚注中提供的值仅供参考。 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。 1.6 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====== 5.1 光穿透可以用于控制许多RECP的质量。光穿透尚未被证明与所有材料的现场性能有关。 5.2 RECP的光穿透力可能会有很大的变化，这取决于垫子基质中使用的复合材料，或者由于给定垫子内的不一致性。为了最大限度地减少变化，本测试方法中指明了具体的样品尺寸和程序，以确保可比结果。 5.3 该试验方法可用于确定不同复合材料和RECP的组成对光穿透的影响。 5.4 此测试方法可用于RECP商业装运的验收测试。中所述的比较测试 5.4.1 可能是可取的。 5.4.1 如果在使用该测试方法进行商业装运的验收测试时，由于报告的测试结果存在差异而产生争议，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。建议提供适当的统计协助来调查偏差。双方至少应取一组尽可能均匀的试样，这些试样由大量相关类型的材料制成。 应将试样以相等数量随机分配到每个实验室进行测试。两个实验室的平均结果应使用学生的 t -开始测试未配对的数据和两者选择的可接受概率水平。如果发现偏差，必须纠正其原因，或者买方和供应商必须就已知偏差达成一致。 注1: 光穿透与RECP提供的地面覆盖物的量没有明确的关系，因为光穿透的量可以包括穿过半透明元件的光或从RECP结构的元件偏转的光。 因此，本试验方法不用于确定RECP的地面覆盖百分比值。 注2: 用户应该意识到，复合材料的构成和可能的运动等可能会影响RECP在卷上、运输和储存后的时间。

1.1 This test method covers measuring the amount of light that penetrates through a rolled erosion control product. 1.2 This test method does not provide light penetration values for RECPs under variable normal sun and soil conditions. This test method determines nominal light penetration. 1.3 This test method is not to be used to determine a percent ground cover value for RECPs, as the amount of light penetration may include light passing through translucent material or reflecting off surfaces. 1.4 The values stated as a percentage are to be regarded as the standard. The values provided in footcandles are for information only. 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 Light penetration may be used to control the quality of many RECPs. Light penetration has not been proven to relate to field performance for all materials. 5.2 The light penetration of RECPs may vary considerably, depending on the composite materials used in the matrix of the mat or due to inconsistency within a given mat. To minimize variation, specific sample size and procedures are indicated in this test method to help ensure comparable results. 5.3 This test method may be used to determine the effect of different composite materials and makeup of RECPs on the penetration of light. 5.4 This test method may be used for acceptance testing of commercial shipments of RECPs. Comparative tests as directed in 5.4.1 may be advisable. 5.4.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. At a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are formed from a lot of material of the type in question. The test specimens should be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student’s t -test for unpaired data and an acceptable probability level chosen by the two begun. If bias is found, either its cause must be corrected, or the purchaser and supplier must agree upon the known bias. Note 1: The light penetration has no definitive relationship to the amount of ground cover provided by a RECP, as the amount of light penetration may include light passing through translucent elements or light deflecting off of elements of the RECP structure. Thus, this test method is not intended to be used to determine a percent ground cover value for RECPs. Note 2: The user should be aware that the makeup and possible movement of the composite materials, and the like, may affect the RECPs following the time when they are rolled up on rolls, shipped, and stored.