1.1 本试验方法包括测定用作混凝土中钢筋或预应力钢筋束的纤维增强聚合物（FRP）复合钢筋的粘结强度。 1.2 提供了两种铸造试样的程序。第一个步骤将钢筋与混凝土浇筑方向对齐。第二个步骤将钢筋横向与混凝土浇筑方向对齐。 1.3 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不一定是精确的等价物； 因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 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、健康和环境实践，并确定监管限制的适用性。 1.5 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 混凝土和FRP钢筋之间的粘结性能是材料规范和设计标准中使用的一个重要性能方面。本试验方法可作为均匀制备试样和测试FRP钢筋与混凝土粘结的方法，并提供计算、评估和报告粘结强度的标准方法。 5.2 通过拉拔试验测量粘结强度的本试验方法旨在用于实验室试验，其中主要变量是FRP钢筋的尺寸或类型。 注1: 该试验方法不应用于确定嵌入混凝土中的FRP钢筋的设计粘结值和延伸长度，因为它不代表在用FRP钢筋加固的混凝土受弯构件中观察到的粘结应力状态。见测试方法 A944 对于梁端测试配置，用于确定钢筋中的粘结应力。 5.3 本试验方法旨在确定材料规范、研究和开发的粘结性能。粘结行为将取决于试样的结构，这可能会影响分析和设计。 主要测试结果是试样与正常重量混凝土的粘结强度。 5.4 该试验方法也可用于确定产品或处理是否符合与其对FRP钢筋和混凝土之间形成的粘结的影响有关的要求。从该试验方法获得的结果仅用于比较目的，以比较粘结强度的参数或变量。该方法可作为协议的一部分，以确定对混凝土粘结的长期环境影响，包括嵌入混凝土中的FRP钢筋的环境折减系数。

1.1 This test method covers the determination of the bond strength of fiber-reinforced polymer (FRP) composite bars used as reinforcing bars or pre-stressing tendons in concrete. 1.2 Two procedures for casting test specimens are provided. The first procedure aligns the bar with the concrete casting direction. The second procedure aligns the bar’s transverse to the concrete casting direction. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 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 behavior of the bond between concrete and FRP reinforcing bars is an important performance aspect that has been used in material specifications and design standards. This test method serves as a means for uniformly preparing specimens and testing FRP bar-to-concrete bond, and for providing a standard method to calculate, evaluate and report bond strength. 5.2 This test method for measuring bond strength by pullout testing is intended for use in laboratory tests in which the principal variable is the size or type of FRP bars. Note 1: This test method should not be used to establish design bond values and development lengths for FRP bars embedded in concrete, as it does not represent the state of bond stress observed in concrete flexural members reinforced with FRP bars. See Test Method A944 for a beam-end test configuration, used for determining bond stress in steel bars. 5.3 This test method is intended to determine the bond behavior for material specifications, research and development. The bond behavior will be specimen-configuration dependent, which may affect both analysis and design. The primary test result is the bond strength of the specimen to normal weight concrete. 5.4 This test method may also be used to determine the conformance of a product or a treatment to a requirement relating to its effect on the bond developed between FRP bar and concrete. The result obtained from this test method should be used only for comparative purposes to compare parameters or variables of bond strength. The method may be used as part of a protocol to establish long-term environmental effects on bond to concrete, including environmental reduction factors for FRP bars embedded in concrete.