1.1 本试验方法包括测定钢渣的潜在体积膨胀，钢渣中含有易水合的成分和随后体积增加的成分，如游离氧化钙和氧化镁。 1.1.1 该方法基于水泥高压釜程序、试验方法 C151/C151M ，以及加利福尼亚承载比程序和测试方法 D1883 . 这是一种积极的测试，可以检测钙和镁的膨胀潜力。该程序也是一种快速方法，通常在24小时内完成 h。 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 注1: 筛孔尺寸由规范中的标准名称确定 E11 . 括号中给出的替代名称仅供参考，并不代表不同的标准筛孔尺寸。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.4 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本试验方法提供了一种程序，用于确定钢渣和其他材料是否符合限制含有水化成分的基层和底基层骨料允许膨胀的规范或应用。 4.2 该试验方法也可用于评估老化或其他处理对降低此类材料膨胀潜力的有效性。 4.3 本试验方法适用于通过25.0 mm（1 in.）的密实级配材料滤器如果需要调查大于25.0 mm（1 in.）的材料应考虑印第安纳州筛子试验方法ITM 219。 4.4 试验结果与现场性能没有相关性，获得的值不一定表明在使用条件下可能发生的膨胀。由于程序的严重性不同，各种方法将提供不同的数值结果。

1.1 This test method covers the determination of potential volume expansion of steel slags that contain components susceptible to hydration and consequent volume increase, such as the free calcium and magnesium oxides. 1.1.1 This method is based upon the Cement Autoclave procedure, Test Method C151/C151M , and the California Bearing Ratio procedure, Test Method D1883 . This is an aggressive test that can detect both calcium and magnesium expansion potentials. The procedure is also a rapid method typically completed within 24 h. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard. Note 1: Sieve size is identified by its standard designation in Specification E11 . The alternative designation given in parentheses is for information only and does not represent a different standard sieve size. 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 test method provides a procedure for determining the compliance of steel slags and other materials with specifications or applications that limit permissible expansion of base and subbase aggregates containing components subject to hydration. 4.2 This test method can also be used to evaluate the effectiveness of aging or other treatments for reducing the expansive potential of such materials. 4.3 This test method is utilized for dense graded materials passing a 25.0 mm (1 in.) sieve. If it is desired to investigate materials larger than a 25.0 mm (1 in.) sieve, Indiana Test Method ITM 219 should be considered. 4.4 Test results have not been correlated with field performance, and values obtained do not necessarily indicate expansion that may occur in service conditions. The various methods will provide different numerical results due to differences in severity of the procedures.