1.1 本试验方法适用于使用便携式冲击板荷载试验装置测量板挠度。该方法包括测量载荷板的挠度，而不是测量路面或基础层表面的挠度（参见 注1 ). 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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====== 4.1 本试验方法涵盖了冲击荷载作用下板挠度的测定。在载荷板顶部的中心测量挠度（参见 注1 ). 注1: 如果荷载板与板下未结合材料“完全均匀”接触，则荷载板的挠度应等于受试未结合材料表面的挠度。然而，对于典型的未结合材料，a 100 % 很难实现均匀接触。 因此，试验表面应尽可能清洁光滑，去除松散颗粒和突出材料。对于砾石表面，建议在测试点上放置一薄层细砂。对于细粒材料，这将有助于在载荷板和表面之间获得合理均匀的接触。见试验方法中的5.1 D1195/D1195M . 4.2 挠度可以直接与路面性能相关，也可以用于确定 现场 路面基础层的材料特性。数据的一些用途包括压实层的质量控制和质量保证，以及承载能力的结构评估（见 注释2 和指南 D4695 ). 注2: 受施加荷载影响的路面基础材料体积是荷载大小、板尺寸和刚度、加载速率、缓冲刚度以及路面基础材料的刚度和剪切强度的函数。 因此，在分析结果时必须小心，因为便携式冲击板负载测试获得的数据可能在与施工完成后重型移动车轮负载通过路面时基本不同的条件下获得。

1.1 This test method applies to measuring plate deflections using a Portable Impulse Plate Load Test device. The method covers the measurement of deflection of the load plate rather than the deflection of the surface of the pavement or foundation layers (see Note 1 ). 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 ====== 4.1 This test method covers the determination of plate deflection resulting from the application of an impulse load. The deflection is measured at the center of the top of the load plate (see Note 1 ). Note 1: If the load plate is in “perfectly uniform” contact with the unbound material under the plate, then deflection of the load plate should be equal to the deflection of the surface of the unbound material under test. However, with typical unbound materials a 100 % uniform contact can seldom be achieved. Accordingly, the test surface shall be as clean and smooth as possible with loose granules and protruding material removed. For gravel surfaces, it is recommended that a thin layer of fine sand be placed over the test point. For fine-grained materials, this will help in obtaining a reasonably uniform contact between the load plate and the surface. See 5.1 in Test Method D1195/D1195M . 4.2 Deflections may be either correlated directly to pavement performance or used to determine in-situ material characteristics of the pavement foundation layers. Some uses of the data include quality control and quality assurance of compacted layers, and for structural evaluation of load carrying capacity (see Note 2 and Guide D4695 ). Note 2: The volume of the pavement foundation materials affected by the applied load is a function of the magnitude of the load, plate size and rigidity, loading rate, buffer stiffness, and the stiffness and shear strength of the pavement foundation materials. Therefore, care must be taken when analyzing the results because the data obtained by the Portable Impulse Plate Load Test may be obtained under substantially different conditions than when a heavy moving wheel load passes over the pavement surface after construction is complete.