1.1 本试验方法描述了确定0.600相对粘结强度的程序 英寸[15.24 mm]直径，270[1860]级水泥浆七线钢绞线，用于预应力地锚，用于评估制造实践对粘结强度的影响。 1.2 所获得的粘结强度值不用于设计取决于现场条件的地锚的粘结长度。 1.3 本试验方法不适用于预应力混凝土应用的粘结试验。 1.4 以英寸磅或国际单位制表示的数值应视为标准。在正文中，国际单位制显示在括号中。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 4.1 预应力和后张法混凝土施工采用七线钢绞线。 4.2 0.600 英寸[15.24 直径为mm]的270级七线钢绞线用于制作预应力地锚，该地锚通常与水泥浆结合。 4.3 制造工艺、后续处理和储存条件可能会影响股线结合。 4.4 该试验方法的主要用途是确定0.600的相对粘结强度 英寸[15.24 mm]七线钢绞线。 4.5 相对粘结强度是通过记录绞线在一定位移时的拔出力来确定的。

1.1 This test method describes procedures to establish the relative bond strength of 0.600 in. [15.24 mm] diameter, Grade 270 [1860] seven-wire steel strand in cement grout as used in prestressed ground anchors for the purpose of evaluating the effects of manufacturing practices on bond strength. 1.2 The bond strength values obtained are not intended to be used to design the bond length of ground anchors that depend on field conditions. 1.3 This test method is not intended to be used as a bond test for prestressed concrete applications. 1.4 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the 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 standard. 1.5 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. 1.6 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 Seven-wire steel strand is used in pre-tensioned and post-tensioned concrete construction. 4.2 0.600 in. [15.24 mm] diameter, Grade 270 seven-wire steel strand is used to make prestressed ground anchors which are often bonded to cement grout. 4.3 Manufacturing processes, subsequent handling, and storage conditions may influence the strand bond. 4.4 The primary use of this test method is to establish the relative bond strength of 0.600 in. [15.24 mm] seven-wire steel strand. 4.5 The relative bond strength is determined by recording the pullout force at a certain displacement of the strand.