1.1 本规程涵盖粘土砖砌体的非研磨性表面清洁，以去除表面污染物，如污垢、油脂、松散材料、烟尘、飞灰、碳氢化合物残留物、藻类等，为应用防水涂料做准备，而不会损坏或改变粘土砖砌体的表面外观。 1.2 本规程包括水清洗、洗涤剂水清洗、加压水清洗、蒸汽清洗和酸洗。它不用于清洁新建造的砖砌体。当表面具有历史性质时，使用本规程中描述的程序可能不合适。 1.3 以英寸-磅为单位的数值应视为标准值。 括号中给出的值仅供参考。 1.4 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。 有关具体危险信息，请参阅第节 5. , 6.4.1.1 和 6.4.1.2 . 1.5 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 表面清洁是必要的，以准备粘土砖砌体表面的应用涂料的目的是防水保护。表面清洁有助于确保涂层的适当附着力，甚至渗透，并防止污渍的意外密封。 4.2 本规程仅涉及表面清洁。可能需要进行其他准备或补救性维修，例如重新喷涂砌体或更换单元，并且必须在应用防水处理之前完成。

1.1 This practice covers non-abrasive surface cleaning of clay brick masonry to remove surface contaminants such as dirt, grease, loose material, soot, fly ash, hydrocarbon residues, algae, etc. in preparation for the application of water repellent coatings without damaging or altering the surface appearance of the clay brick masonry. 1.2 Procedures included in this practice are water cleaning, detergent water cleaning, pressurized water cleaning, steam cleaning, and acid cleaning. It is not intended for the cleaning of newly constructed brick masonry. Use of procedures described in this practice may not be appropriate where the surface is of a historical nature. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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. For specific hazard information see Section 5 , 6.4.1.1 , and 6.4.1.2 . 1.5 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 Surface cleaning is necessary to prepare clay brick masonry surfaces for application of coatings intended for water repellent protection. Surface cleaning helps to ensure proper adhesion or even penetration of the coating and to prevent unintended sealing-in of stains. 4.2 This practice addresses surface cleaning only. Other preparation or remedial repairs, such as repointing the masonry or replacing of units, may be necessary and must be completed prior to application of the water repellent treatment.