1.1 本试验方法涵盖悬臂梁的样品制备和热塑性路面标线材料的试验方法，类似于试验方法中列出的“Izod冲击”方法 D4812 . 1.1.1 有些方法要求以英寸-磅力（in.·lbf）作为结果，而不是普通的英尺-磅力/英寸（ft·lbf/in.）或焦耳/米（J/m）（类似横截面试样单位吸收的能量）。该方法并未涵盖与悬臂梁摆锤冲击有关的所有问题，并建议采用该试验方法 D4812 和试验方法 D256 在尝试此方法之前，请先进行审查。 1.1.2 热塑性路面标线材料是一种高度填充的聚合物基质。根据公式，所得矩阵可能易碎，因此可能导致测试结果不一致。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 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。 1.4 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 本试验的意义在于确定热塑性路面标线材料在实验室条件下的抗冲击性。该方法提供了冲击破坏的数值结果，可用于评估质量和确定材料之间的相对性能。 5.2 当对热塑性路面标线材料进行摆锤冲击试验时，结果可以表明强度和脆性特性有助于研究和提高其现场耐久性。任何试图执行此测试的人都应该首先审查测试方法 D256 和试验方法 D4812 ; 特别是设备设置。 5.3 以下样品制备和测试设置方法很重要，因此样品制备中的不一致不会导致测试热塑性路面标线材料时固有的结果更加不一致。

1.1 This test method covers the sample preparation for cantilever beams and test methodology of thermoplastic pavement marking materials, similar to the “Izod Impact” method listed in Test Method D4812 . 1.1.1 Some methods call for results in inch pound-force (in.·lbf) as opposed to the common foot pound-force/inch (ft·lbf/in.) or Joule/meter (J/m) (energy absorbed per unit of specimen of similar cross-section). This method does not purport to cover all the issues involved with the pendulum impact of cantilever beams and suggests that Test Method D4812 and Test Methods D256 be reviewed before this methodology is attempted. 1.1.2 Thermoplastic pavement marking materials are a highly filled polymer matrix. Depending on the formula the resulting matrix may be brittle, therefore possibly resulting in inconsistent test results. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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. 1.4 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 significance of this test is to determine the thermoplastic pavement marking material’s resistance to impact, under laboratory conditions. The method provides a numerical result for impact failure which can be used to assess quality and determine relative performance between materials. 5.2 When the pendulum-impact test is performed on thermoplastic pavement marking materials, the results can indicate the strength and brittleness properties helpful in researching and improving their field durability. Anyone attempting to perform this test should initially review Test Methods D256 and Test Method D4812 ; especially the equipment setup. 5.3 The following sample preparation and testing setup method is important so inconsistencies in sample preparation do not cause more inconsistency in the results that are inherent when testing thermoplastic pavement marking materials.