1.1 这些试验方法包括测定一段硅酸盐水泥基灰泥的抗拉强度、硅酸盐水泥基石膏和实心灰泥基层之间的粘结强度，或外部（灰泥）或内部应用中框架上的硅酸盐水泥基抹灰基层的紧固件拉拔或板条拉拔强度的程序。测试程序在局部测试区域内具有破坏性，测试结束后，需要对饰面系统以及测试过程中损坏的任何底层材料进行适当修复。 1.2 这些试验方法适用于硅酸盐水泥- 基于新建筑和现有建筑的灰泥饰面系统。试验方法应至少进行28次 施用硅酸盐水泥基灰泥后的几天。机械负荷试验方法A和真空室试验应用于确定直接应用的硅酸盐水泥基灰泥的抗拉强度或粘结强度，并可用于评估不同表面处理特性、粘结剂或两者的功效。应使用机械负荷试验方法B和真空室试验来确定安装在机械连接板条上的硅酸盐水泥基灰泥的抗拉强度。 1.3 这些测试方法适用于实验室和现场样品。实验室试验和现场试验之间不得有任何关联。 1.4 这些试验方法并非用于评估底层结构或框架构件的性能。根据样本位置、条件和安装情况，特定建筑的测试结果可能会发生变化，并由测试指定人员进行解释。 1.5 这些试验方法并非用于评估硅酸盐水泥基灰泥表面涂层的性能。 1.6 这些测试方法并非- 施工鉴定，以确定表面是否适合使用硅酸盐水泥抹面。该试验方法旨在用作定量评估现有硅酸盐水泥灰泥覆层的工具，该覆层被怀疑与基底的粘结有问题或紧固不确定。 1.7 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.8 本标准可能涉及危险材料、操作或设备。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。 1.9 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 本标准中试验方法的目的是测量硅酸盐水泥的抗拉强度或粘结强度- 以石膏为基材。使用试验方法获得的值并不代表特定硅酸盐水泥基灰泥装置的实际风荷载能力或其他结构特性，但可能有助于评估此类荷载能力。 4.2 由于本标准中描述的试验方法用于评估固化至少28天的硅酸盐水泥基灰泥，因此必须根据良好的工程实践、适用的建筑法规和具有管辖权的规范来解释通过任何一种试验方法获得的荷载结果。是否直接使用荷载结果，或使用经适当安全系数修改的荷载结果，以获得可接受的工作荷载，由试验指定人员自行决定。 适当安全系数的确定应由试验指定人员自行决定。附录中提供了计算安全系数和最大允许工作载荷的方法。 4.3 当本标准中包含的试验方法用于安装在现有结构上的试样时，在没有足够的试验取样的情况下，不得将试验结果推广到更大的壁面积。此类工作应基于工程经验和测试指定人员的判断。

1.1 These test methods cover procedures for determining the tensile strength of a section of portland cement-based plaster, the bond strength between portland cement-based plaster and a solid plaster base, or the fastener pull-out or lath pull-over strength for portland cement-based plaster bases over framing in either an exterior (stucco) or interior application. The test procedures are destructive in nature within the localized test areas and, after testing is concluded, require appropriate repair of the finish system as well as any underlying materials damaged during testing. 1.2 These test methods are suitable for use on portland cement-based plaster finish systems on both new and existing construction. Test methods shall be conducted a minimum of 28 days after application of the portland cement-based plaster. Mechanical Load Test Method A and Vacuum Chamber Testing shall be used to determine the tensile strength or bond strength of direct-applied portland cement-based plaster and may be useful in evaluating the efficacy of different surface preparation characteristics, bonding agents, or both. Mechanical Load Test Method B and Vacuum Chamber Testing shall be used to determine the tensile strength of portland cement-based plaster installed over mechanically attached lath. 1.3 These test methods are suitable for use in both laboratory and field samples. No correlation shall be made between laboratory and field testing. 1.4 These test methods are not intended to evaluate the performance of the underlying construction or framing members. Test results on a particular building may be variable depending on the specimen location, condition, and installation, and are subject to interpretation by the test specifier. 1.5 These test methods are not intended to evaluate the performance of coatings applied to the surface of the portland cement-based plaster. 1.6 These test methods are not intended to be a pre-construction qualifier to determine if the surfaces are appropriate for application of portland cement plaster. The test methods are intended to be used as a tool to quantitatively evaluate existing portland cement plaster cladding that is suspected of questionable bond or uncertain fastening to the substrate. 1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.8 This standard may involve hazardous materials, operations, or equipment. 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. 1.9 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 The purpose of the test methods in this standard is to measure the tensile strength or bond strength of portland cement-based plaster to its substrate. The values obtained using the test methods are not purported to be representative of the actual wind load capacity or other structural properties of a specific portland cement-based plaster installation but may be helpful in assessing such load capacities. 4.2 Because the test methods described in this standard are used for evaluation of portland cement-based plaster cured at least 28 days, load results obtained by either test method must be interpreted based on sound engineering practice, applicable building regulations, and codes having jurisdiction. The decision of whether to use the load results directly or to use the load results as modified by an appropriate safety factor to obtain acceptable working loads is left to the discretion of the test specifier. Determination of an appropriate safety factor shall be left to the discretion of the test specifier. Methods to calculate a safety factor and a maximum permitted working load are provided in the appendixes. 4.3 When the test methods contained in this standard are used on test specimens installed on existing structures, the test results shall not be generalized to a larger wall area without sufficient test sampling. Such efforts should be based on engineering experience and judgment of the test specifier.