1.1 本试验方法包括使用宽试样拉伸法测量土工织物的拉伸性能。本试验方法适用于大多数土工布，包括用于土工布应用的编织土工布、非织造土工布和层状织物以及针织织物。 1.2 该试验方法包括土工织物抗拉强度和伸长率的测量，并包括初始模量、偏移模量、割线模量和断裂韧性的计算方向。 1.3 宽法测量条件土工布和湿土工布拉伸性能的程序- 包括宽度法。 1.4 该试验方法与其他测量带材拉伸性能的方法之间的基本区别在于试样的宽度。土工织物应用中使用的一些织物在标距区域的力作用下有收缩（颈缩）的趋势。本试验方法中规定的试样宽度越大，这些织物的收缩效应就越小，并提供了与现场预期土工布性能和标准比较更密切的关系。 1.5 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可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值结合起来可能会导致不符合标准。 1.6 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 土工织物的宽宽度力伸长特性的确定为加固型应用提供了设计参数，例如，加固道路/路面、软路基上的加固路堤、加固土挡土墙和边坡加固的设计。当强度不一定是设计考虑因素时，可使用替代测试方法进行验收测试。试验方法 D4595/D4595米 为了测定土工布的宽幅拉伸性能，可用于土工布商业装运的验收测试，但建议谨慎，因为有关- 实验室精度不完整( 注3 ). 中所述的比较测试 5.1.1 可能是可取的。 5.1.1 在使用测试方法时，由于报告的测试结果存在差异而引起争议的情况下 D4595/D4595米 对于商业货物的验收测试，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。至少，双方应采取一组尽可能均匀的试样，这些试样来自大量相关类型的材料。 然后，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 -测试未配对的数据和双方在测试开始前选择的可接受的概率水平。如果发现偏差，必须找到并纠正其原因，或者买方和供应商必须同意根据已知偏差解释未来的测试结果。 5.2 大多数土工织物都可以用这种测试方法进行测试。根据土工织物的结构，可能需要对夹持技术进行一些修改。 对于坚固的土工布或玻璃纤维制成的土工织物，可能需要进行特殊的夹紧适配，以防止它们在夹具中滑动或因夹在夹具中而损坏。如果获得了具有代表性的抗拉强度，则可根据需要对试样夹紧进行修改，具体由实验室自行决定。在任何情况下，第节中所述的程序 10 必须保持这种获得宽宽度条带抗拉强度的试验方法。 5.3 本试验方法适用于土工织物的干态或湿态试验。 它与恒定拉伸速率型张力装置一起使用。 5.4 使用抗拉强度测试方法限制 夹紧的 宽度尺寸小于等于50 mm[2 in.]，如松散、切割带和抓持试验程序，已被发现不适合于确定某些土工织物的设计强度参数的这种试验方法。非织造土工布尤其如此。工业界已经探索了宽带技术，并建议在这些情况下用于土工织物应用。 5.4.1 该试验方法可能不适用于土工布应用中使用的某些织物，这些织物的强度约为100 kN/m或600 lbf/in。 由于夹紧和设备限制。在这些情况下，100 mm[4 In.]宽度的试样可以代替200 mm[8 In.]宽的试样。在这些织物上 1.4 最小，因此可以继续进行标准比较。

1.1 This test method covers the measurement of tensile properties of geotextiles using a wide-width specimen tensile method. This test method is applicable to most geotextiles that include woven geotextiles, nonwoven geotextiles, layered fabrics, and knit fabrics that are used for geotextile applications. 1.2 This test method covers the measurement of tensile strength and elongation of geotextiles and includes directions for the calculation of initial modulus, offset modulus, secant modulus, and breaking toughness. 1.3 Procedures for measuring the tensile properties of both conditioned and wet geotextiles by the wide-width method are included. 1.4 The basic distinction between this test method and other methods for measuring strip tensile properties is the width of the specimen. Some fabrics used in geotextile applications have a tendency to contract (neck down) under a force in the gage length area. The greater width of the specimen specified in this test method minimizes the contraction effect of those fabrics and provides a closer relationship to expected geotextile behavior in the field and a standard comparison. 1.5 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. 1.6 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 The determination of the wide-width force-elongation properties of geotextiles provides design parameters for reinforcement type applications, for example, design of reinforced roadways/pavements, reinforced embankments over soft subgrades, reinforced soil retaining walls, and reinforcement of slopes. When strength is not necessarily a design consideration, an alternative test method may be used for acceptance testing. Test Method D4595/D4595M for the determination of the wide-width tensile properties of geotextiles may be used for the acceptance testing of commercial shipments of geotextiles, but caution is advised since information about between-laboratory precision is incomplete ( Note 3 ). Comparative tests as directed in 5.1.1 may be advisable. 5.1.1 In cases of a dispute arising from differences in reported test results when using Test Method D4595/D4595M 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 which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens should then 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 parties before the testing began. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias. 5.2 Most geotextiles can be tested by this test method. Some modification of clamping techniques may be necessary for a given geotextile depending upon its structure. Special clamping adaptions may be necessary with strong geotextiles or geotextiles made from glass fibers to prevent them from slipping in the clamps or being damaged as a result of being gripped in the clamps. Specimen clamping may be modified as required at the discretion of the individual laboratory, provided a representative tensile strength is obtained. In any event, the procedure described in Section 10 of this test method for obtaining wide-width strip tensile strength must be maintained. 5.3 This test method is applicable for testing geotextiles either dry or wet. It is used with a constant-rate-of-extension type tension apparatus. 5.4 The use of tensile strength test methods that restrict the clamped width dimension to 50 mm [2 in.] or less, such as the ravel, cut strip, and grab test procedures, have been found less suitable than this test method for determining design strength parameters for some geotextiles. This is particularly the case for nonwoven geotextiles. The wide-width strip technique has been explored by the industry and is recommended in these cases for geotextile applications. 5.4.1 This test method may not be suited for some woven fabrics used in geotextile applications that exhibit strengths approximately 100 kN/m or 600 lbf/in. due to clamping and equipment limitations. In those cases, 100 mm [4 in.] width specimens may be substituted for 200 mm [8 in.] width specimens. On those fabrics, the contraction effect cited in 1.4 is minimal and, consequently, the standard comparison can continue to be made.