1.1 本试验方法描述了测定七丝预应力钢绞线粘结力的程序。通过本试验方法确定的粘结力表示为将钢绞线穿过圆柱形钢套管中固化砂浆所需的拉力。试验结果是在对应于0.1 in移动的钢绞线加载端测得的拉力。[2.5 mm]在钢绞线的自由端。 1.2 本试验方法适用于英寸-磅单位（如试验方法A1081）或国际单位制（如试验方法A1081M）。 1.3 以英寸为单位的数值- 磅单位或国际单位应单独视为标准。在本文中，国际单位制显示在括号中。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。组合两个系统的值可能会导致不符合测试方法。 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 预应力钢绞线用于先张和后张混凝土施工。 5.2 在预张拉混凝土应用中，预应力钢绞线预计将通过外露钢绞线表面与周围胶结材料的粘附（即粘结）将预应力转移到结构构件上。 5.3 制造工艺、后续处理和储存条件可能会影响钢绞线粘结。 5.4 预应力钢绞线用于各种混凝土混合物的施工应用中。为每种独特混合物中的绞线性能制定测试和阈值是不切实际的。

1.1 This test method describes procedures for determining the bond of seven-wire steel prestressing strand. The bond determined by this test method is stated as the tensile force required to pull the strand through the cured mortar in a cylindrical steel casing. The result of the test is the tensile force measured on the loaded-end of the strand corresponding to a movement of 0.1 in. [2.5 mm] at the free-end of the strand. 1.2 This test method is applicable either in inch-pound units (as Test Method A1081) or SI units (as Test Method A1081M). 1.3 The values stated in either inch-pound units or in SI units are to be regarded separately as standard. Within the text, SI units are shown in brackets. 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 test method. 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 Prestressing steel strand is used in pre-tensioned and post-tensioned concrete construction. 5.2 In pre-tensioned concrete applications, the prestressing steel strand is expected to transfer prestressing forces to the structural member by means of the adhesion (that is, bond) of the exposed wire strand surfaces to the surrounding cementitous material. 5.3 Manufacturing processes, subsequent handling, and storage conditions can influence the strand bond. 5.4 Prestressing steel strand is used in construction applications with a variety of concrete mixtures. Developing tests and threshold values for the performance of the strand in each of these unique mixtures is impractical.