1.1本规范涵盖了在水硬性水泥混凝土和砂浆中用作改性剂以提高附着力和降低渗透性时，乳胶和可再分散粉末的性能标准（见）。 注1 有关聚合物改性水硬性水泥基混合物的理论、优点、局限性和应用的更多信息，请参阅ACI 548.3R-95。 1.2性能标准基于使用聚合物改性剂与参考混凝土或砂浆相比所实现的某些性能变化（试验方法C 1439）。 1.3本规范不包括预包装的专有砂浆产品。此外，本规范仅涵盖试验方法C 1439中列出的参考或试验混合物中包含的材料。 1.4以国际单位制表示的数值应视为标准值。 以下预防说明仅适用于本规范试验方法部分第节: 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和健康实践，并确定监管限制的适用性。

1.1 This specification covers performance criteria for latexes and redispersible powders when used as modifiers in hydraulic cement concretes and mortars to improve adhesion and reduce permeability (see ). Note 1 For further information concerning theory, benefits, limitations, and applications of polymer-modified hydraulic cementitious mixtures, refer to ACI 548.3R-95. 1.2 The performance criteria are based on certain property changes that are achieved by use of the polymer modifier when compared to reference concrete or mortar (Test Methods C 1439). 1.3 Prepackaged, proprietary mortar products are not included in this specification. Also, this specification covers only those materials contained in the reference or test mixtures listed in Test Methods C 1439. 1.4 The values stated in SI units are to be regarded as standard. The following precautionary statement pertains only to the test method portion, Section, of this specification: 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 and health practices and determine the applicability of regulatory limitations prior to use.