1.1 本规范涵盖两种类型的终饰熟石灰，适用于灰泥的刮涂、棕色和终饰层、灰泥、砂浆，以及作为波特兰水泥混凝土的添加剂。根据本规范出售的两种石灰应指定如下: 1.1.1 类型N- 用于饰面的普通熟石灰，以及 1.1.2 S型- 用于饰面的特殊熟石灰。 注1: N型普通终饰熟石灰与S型特殊终饰熟石灰的区别在于，N型水合物对未水化氧化物的量没有规定限制，N型水合物的塑性要求应在浸泡16至24小时后确定。 注2: 石灰腻子见规范 C1489 . 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 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。

1.1 This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to portland-cement concrete. The two types of lime sold under this specification shall be designated as follows: 1.1.1 Type N— Normal hydrated lime for finishing purposes, and 1.1.2 Type S— Special hydrated lime for finishing purposes. Note 1: Type N, normal finishing hydrated lime, is differentiated from Type S, special finishing hydrated lime, in that no limitation on the amount of unhydrated oxides is specified for Type N hydrate, and the plasticity requirement for Type N hydrate shall be determined after soaking for 16 to 24 h. Note 2: For lime putty, refer to Specification C1489 . 1.2 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. 1.3 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.