1.1 本试验方法包括测定玻璃纤维网在碱溶液中调节后的断裂力的程序。该方法适用于外部绝缘和饰面系统（EIFS）中使用的玻璃纤维网，以及带有含有波特兰水泥作为成分的底漆的排水EIFS。 1.2 断裂力既表示为每单位宽度的网的力，也表示为未暴露于碱调节的网的断裂力的百分比。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的值不得合并使用。1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 玻璃纤维增强网用于加固EIFS和带排水系统的EIFS。将增强网嵌入含有波特兰水泥的底漆中，这可能使增强网中的玻璃纤维因碱的作用而变弱。通过该方法测定的碱暴露后的断裂力是用于在实验室中比较评估玻璃纤维增强网的耐碱性的因素。 5.2 本试验方法并不旨在模拟服役中可能遇到的条件。EIFS或带排水系统的EIFS的性能取决于许多因素，例如正确的安装、支撑结构的刚性以及系统对其他原因造成的恶化的抵抗力。

1.1 This test method covers procedures for determining the breaking force of glass fiber mesh following their conditioning in an alkali solution. The method is applicable to glass fiber mesh used in Exterior Insulation and Finish Systems (EIFS) and EIFS with drainage with base coats that contain portland cement as an ingredient. 1.2 Breaking force is expressed both as force per unit width of mesh and as a percentage of the breaking force of the mesh that has not been exposed to alkali conditioning. 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 Glass fiber reinforcing meshes are used to strengthen EIFS and EIFS with drainage. The reinforcing meshes are embedded into base coats that contain portland cement, which potentially exposes the glass fibers in the reinforcing meshes to weakening by the action of alkali. The breaking force following alkali exposure as determined by this method is a factor used to comparatively evaluate the alkali resistance of glass fiber reinforcing meshes in the laboratory. 5.2 This test method does not purport to simulate the conditions that may be encountered in service. The performance of an EIFS or EIFS with drainage is a function of many factors, such as proper installation, rigidity of supporting construction, and resistance of the system to deterioration by other causes.