1.1 本试验方法包括评估混凝土涂层剥离强度的程序。试验方法中描述了其他刚性基材涂层的剥离强度 D4541型 该测试确定了在材料塞被分离之前，表面区域可以承受的最大垂直力（张力）。故障将沿着由加载夹具、胶水、涂层系统和基底组成的系统内的最弱平面发生，并将通过断裂表面暴露。 1.2 该测试方法使用一种称为便携式剥离附着力测试仪的设备。 2. 它们能够在单个表面上施加同心载荷和反向载荷，从而即使只有一侧可接近，也可以测试涂层。 测量受加载夹具、涂层系统和基材之间的粘结强度或胶水、涂层和基材的内聚强度的限制。 1.3 该测试方法适用于实验室和现场测试。 1.4 拉脱强度测量取决于材料和仪器参数。所使用的不同仪器符合本测试方法。报告结果时，应确定使用的具体工具。该测试具有破坏性，可能需要进行现场维修。 1.5 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。 1.6 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建立适当的安全、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（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 混凝土基底涂层的剥离强度和破坏模式是规范中使用的重要性能特性。 该试验方法可作为均匀制备和测试涂层表面、评估和报告结果的方法。 5.2 使用不同的仪器、不同的基材或具有相同涂层的不同加载夹具获得的强度结果可能会发生变化。因此，建议相关方共同商定具体的测试仪器和加载夹具。 5.3 建议涂层充分固化，以确保内聚强度和附着力。测试前所需的最短固化时间应由涂层制造商提供，并且可能由于现场的大气条件（例如，低温、低湿度或高湿度）而需要延长。 5.4 该试验方法可用于测定未涂覆混凝土的表面强度（见 第2.1页 ). 试验方法 第1583页 也适用于该确定。 5.5 该方法的目的是确定涂层与混凝土的附着力（或适用于表1所述的表面强度） 5.4 )并且将导致涂层或基板表面附近的失效。如果测试的目的是评估基底或水泥表面的粘结强度，或者如果基底或水泥面层的强度较低，则测试方法 第1583页 可能更合适。

1.1 This test method covers procedures for evaluating the pull-off strength of a coating on concrete. Pull-Off strength of coatings for other rigid substrates is described in Test Method D4541 . The test determines the greatest perpendicular force (in tension) that a surface area can bear before a plug of material is detached. Failure will occur along the weakest plane within the system comprised of the loading fixture, glue, coating system, and substrate, and will be exposed by the fracture surface. 1.2 This test method uses a class of apparatus known as portable pull-off adhesion testers. 2 They are capable of applying a concentric load and counter load to a single surface so that coatings can be tested even though only one side is accessible. Measurements are limited by the strength of adhesion bonds between the loading fixture, coating system and the substrate or the cohesive strengths of the glue, coating layers, and substrate. 1.3 This test method is suitable for both laboratory and field testing. 1.4 Pull-off strength measurements depend upon both material and instrumental parameters. There are different instruments used that comply with this test method. The specific instrument used should be identified when reporting results. This test is destructive and spot repairs may be necessary. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 pull-off strength and mode of failure of a coating from a concrete substrate are important performance properties that are used in specifications. This test method serves as a means for uniformly preparing and testing coated surfaces, and evaluating and reporting the results. 5.2 Variations in strength results obtained using different instruments, different substrates, or different loading fixtures with the same coating are possible. Therefore, it is recommended that the specific test instrument and loading fixture be mutually agreed upon between the interested parties. 5.3 It is recommended that the coating be sufficiently cured to ensure cohesive strength and adhesion. This required minimum cure time before testing should be provided by the coating manufacturer, and may require an extension due to atmospheric conditions on site (for example, low temperature, and low or high humidity). 5.4 This test method may be adapted to determine surface strength of uncoated concrete (see X2.1 ). Test Method C1583 is also suitable for that determination. 5.5 The objective of this method is to determine the adhesion of a coating to concrete (or adapted for surface strength as stated in 5.4 ) and will result in failure in the coating or near the substrate surface. If evaluating the cohesive strength of the substrate or cementitious surfacers is the purpose of the testing, or if the substrate or cementitious surfacers have low strength, then Test Method C1583 may be more suitable.