1.1本试验方法旨在测试碾压混凝土样本，并涵盖在多种提升形式的施工中确定碾压混凝土或其他硬化混凝土层之间的相对粘结力。它适用于所有类型的分层碾压混凝土，其中总深度足以满足本试验方法的最小试样长度和直径要求。本试验方法无意提供受试材料的抗拉强度结果。 1.2以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。 将两个系统的值合并可能会导致不符合标准。 1.3本标准的文本引用了注释和脚注，这些注释和脚注提供了解释性材料。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.4 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法用于测量辊子的相对粘合强度- 通过在接缝处进行点荷载试验，将压实混凝土与其他碾压混凝土连接起来（见注释1）。使用钻孔芯或铸造圆柱形试样确定相对粘结强度，其中粘结表面基本垂直于试样中间长度处的纵轴。通过在接头处施加点载荷，产生垂直于粘结表面的劈裂拉应力。 测试结果的数值可以与测试由相同材料和相同工艺制成的其他试样获得的数值进行比较。结果可用于比较各种接头条件、接头处理或应用于接头的粘接材料的相对粘接强度。 试验结果不得视为真实粘结强度。内聚力或抗拉强度值应通过本试验方法以外的方法确定。 本试验方法可用于通过铸造单个复合材料圆柱体或通过取芯原型结构或组件进行实验室研究（试验方法 C42/C42M ). 笔记 1-本试验可用于测试RCC以外的其他硬化水硬性水泥基材料的相对粘结性。

1.1 This test method is intended for testing roller-compacted concrete specimens and covers determination of the relative bond between layers of roller-compacted concrete or other hardened concrete in multiple-lift forms of construction. It is applicable to all types of layered roller-compacted concrete where the total depth is sufficient to meet the minimum specimen length and diameter requirements of this test method. This test method is not intended to provide tensile strength results of the material tested. 1.2 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 non-conformance with the standard. 1.3 The text of this standard references notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== This test method is used to measure the relative bond strength of roller-compacted concrete to other roller-compacted concrete by using a point load test at the joint (See Note 1). Relative bond strength is determined using drilled cores or cast cylindrical specimens in which the bond surface is essentially normal to the longitudinal axis at approximately the mid-length of the specimen. A splitting tensile stress normal to the bond surface is produced by applying a point load at the joint. The test results in a value that can be compared to that obtained by testing other specimens which are made from the same materials and by the same process. Results can be used for the purpose of comparing the relative bond strength of various joint conditions, joint treatments, or bonding materials applied to the joint. The test results are not to be taken as a true bond strength. Values of cohesion or tensile strength shall be determined by methods other than this test method. This test method may be used either for laboratory investigation by casting individual composite cylinders or by coring prototype structures or assemblies (Test Method C42/C42M ). Note 1—This test may be used for testing the relative bond of other hardened hydraulic cement-based materials other than RCC.