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Standard Practice for Determining Variability of Concrete-Making Materials From a Single Source 标准实践确定来自单一来源的混凝土制造材料的可变性
发布日期: 2024-10-01
1.1 本规范涵盖了通过测量材料的特性来确定来自单一来源的混凝土制造材料的可变性的程序。它包括关于采样、测试、数据分析和报告的建议。 1.2 这种做法的单位制没有规定。在计算方法的示例中使用的单位是为了说明的目的。本实践中描述的计算方法可用于SI或英寸-磅单位。 1.3 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。 1.4 本国际标准是根据《关于国际标准制定原则的决定》中确立的国际公认的标准化原则制定的世界贸易组织技术性贸易壁垒委员会发布的标准、指南和建议。 ======意义和用途====== 4.1 该实践提供了一个系统的程序,用于取样和确定用户选择的混凝土制造材料性能的可变性。应用实践得出的结果通常仅供参考,不是任何现有ASTM混凝土或混凝土制造材料规范的要求。混凝土材料规范可以参考该实践作为获得可变性信息的手段,但需要定义要测量的特性以及要使用的批量和样品单位。该实践适用于混凝土制造材料的生产者和消费者,尽管该实践的应用细节可能会有所不同,这取决于该实践使用者的预期目的。4.2 该程序适用于可以通过标准测试方法测量的任何混凝土制造材料的任何定量特性。该程序基于抓取样本,这些样本往往会显示被评估材料的最大变化量。如果从交付给材料用户的取样单元获得抓取样品,并且比对材料进行的符合规范的测试更好地代表混凝土生产中使用的材料的可变性,则该程序是有用的。测试报告或材料认证。该程序是为应用于来自单一来源的材料而开发的,但它也可以应用于来自多个来源的材料输送流,这取决于实践用户的目的。对批次内不同样品的测试结果之间的差异进行测试误差校正,从而给出所选材料特性可变性的估计值。所选材料特性的可变性为用户提供了混凝土制造材料的来源变化的一个指标。 4.3 尽管混凝土制造材料性能的可变性可能是混凝土性能可变性的一个重要原因,但这种做法并不旨在提供关于这种关系的信息。这种做法确实提供了关于混凝土制造材料可变性的信息,用户可以根据这些信息,以及补充信息或混凝土性能的相关测试,对影响进行定量估计。
1.1 This practice covers a procedure for determining the variability of concrete-making materials from a single source by measuring a characteristic property of the material. It includes recommendations on sampling, testing, analysis of data, and reporting. 1.2 The system of units for this practice is not specified. Units used in examples of calculation methods are for illustration purposes. The calculation methods described in this practice can be used with either SI or inch-pound units. 1.3 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. 1.4 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 This practice provides a systematic procedure for sampling and determining the variability of user-selected properties of concrete-making materials. Results derived from application of the practice are generally intended for information only and are not requirements of any existing ASTM specification on concrete or concrete-making materials. A concrete materials specification may make reference to this practice as a means of obtaining variability information, but needs to define the properties to be measured and the lot size and sample unit to be used. This practice is applicable to both producers and consumers of concrete-making materials, although details of application of the practice may vary, depending on the intended purpose of the user of this practice. 4.2 The procedure is applicable to any quantitative property of any concrete-making material that can be measured by a standard test method. The procedure is based on grab samples, which will tend to show the maximum amount of variation of the material being evaluated. The procedure is useful if grab samples are obtained from sampling units that are being delivered to the user of a material and better represents the variability of the material used in concrete production than tests performed on the material for specification compliance that are documented on a mill test report or material certification. The procedure was developed for application to materials from a single source, but it can be applied to a materials delivery stream from more than one source, depending on the purposes of the user of the practice. Variations among test results on separate samples within a lot are corrected for testing error, therefore giving an estimate of the variability of the selected material property. The variability of the selected material property provides the user with one indicator of the source variation of the concrete-making material. 4.3 Although variability in properties of concrete-making materials can be a significant cause of variability in concrete properties, this practice does not purport to give information on this relationship. This practice does give information on variability of concrete-making materials from which the user can, along with supplementary information or correlative testing of concrete properties, develop quantitative estimates of the effects.
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归口单位: C09.94
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