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现行 ASTM D7966/D7966M-16(2023)
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Standard Test Method for Resistance to Creep of Adhesives in Static Shear by Compression Loading (Wood-to-Wood) 用压缩载荷(木材对木材)测定胶粘剂在静态剪切中抗蠕变的标准试验方法
发布日期: 2023-05-01
1.1 本试验方法涵盖了当标准样品在不同水平的静载荷、恒定温度和相对湿度下受到剪切应力时,木与木结合中结构粘合剂蠕变性能的测定。提供了用于在静态载荷下粘合剂结合的剪切变形(蠕变)的装置和程序。本试验方法在指定条件下用于评估结构木粘合剂的抗蠕变性能。 1.2 该试验方法用于评估适用于将木材(包括处理过的木材)粘合到一般建筑、海洋用途或其他用途的结构木产品中的粘合剂的蠕变性能- 强度一般的结构,抗蠕变,耐用的粘合是必需的。单独的块体剪切试样由粘合的叠片制备,在温度和相对湿度的各种组合下承受恒定载荷,并测量蠕变量。 1.3 通过该测试方法测量的结构木粘合剂的蠕变可能无法与其他ASTM方法进行比较,并且仅限于本文所包含的测试条件和程序。 1.4 以国际单位制或英寸磅单位表示的数值应单独视为标准。 每个系统中规定的值不一定是精确的等效值;因此,为了确保符合标准,每个系统应独立使用,并且两个系统的值不应合并。 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====== 5.1 该试验方法通过在静态载荷下的抗蠕变性来评估层压木材中粘合剂的性能。 5.2 在指定的测试环境条件下,评估粘合剂抗蠕变性能的测试结果提供了粘合剂在相对较长的时间内承受恒定载荷的能力的衡量标准。 5.3 用该试验方法测量的蠕变通常与规范一起使用,例如但不限于规范 2559英镑 和CSA O112.9,以确认当受到特定水平的应力、载荷持续时间和环境条件时,粘合剂在设计载荷下抗蠕变的适用性。
1.1 This test method covers the determination of creep properties of structural adhesives in wood-to-wood bonds when a standardized specimen is subjected to shearing stresses at various levels of static load, constant temperature, and relative humidity. Apparatus and procedures are provided for shear deformation (creep) of adhesive bonds under static load. This test method is used under the indicated conditions to evaluate resistance to creep properties of a structural wood adhesive. 1.2 The test method is used to evaluate creep performance of adhesives suitable for the bonding of wood, including treated wood, into structural wood products for general construction, marine use, or for other uses where a high-strength general construction, creep-resistant, durable adhesive bond is required. Individual block shear specimens are prepared from adhesively bonded laminations, subjected to a constant load under various combinations of temperature and relative humidity, and the amount of creep measured. 1.3 Creep of structural wood adhesives as measured by this test method may not be comparative to other ASTM methods and is limited to the conditions of the test and procedures contained herein. 1.4 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. 1.5 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 ====== 5.1 This test method evaluates the performance of the adhesive in laminated wood as measured by resistance to creep under static load. 5.2 Test results from the evaluation of adhesive creep resistance, under designated environmental conditions of the test, provide a measure of the adhesive’s ability to withstand constant loading over a relatively long period of time. 5.3 Creep measured with this test method is normally used in conjunction with specifications such as, but not limited to Specification D2559 and CSA O112.9 to confirm suitability of an adhesive to resist creep under designed loads when subjected to specific levels of stress, load duration and environmental conditions.
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归口单位: D14.30
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