1.1 本指南描述了可用于清洁尺寸石外部的材料和程序，以及使用这些材料和程序的条件。它旨在帮助业主、维护主管和建筑经理、建筑师和工程师以及承包商清洁商业、住宅和机构结构上的垂直外部尺寸石材。本指南也可能有助于那些希望清理桥梁、挡土墙、坡道和广场上的砌石，以及雕像、纪念物和墓碑等独立式石头物体的人。 1.2 本指南主要涉及外部尺寸石材表面光洁度的日常维护。 本文提及的技术可能不适合或不符合成本效益，用于修复受损、严重污染或着色的石雕，或具有特殊历史意义的石雕。如果在具有文化、公民、历史或建筑意义的表面上出现污渍，建议咨询专家。 1.3 本指南的用户还应获得并在工作现场和办公室材料安全数据表（MSDS）存档，该数据表描述了清洁过程中使用的所有化学产品的性质。 1.4 每个项目范围内涉及的所有产品的制造商提供的文献文件应可供参考。 1.5 这些程序不适用于内部石方工程。 1.6 本指南提供了有组织的信息收集或一系列选项，并不推荐具体的行动方案。本文件不能取代教育或经验，应与专业判断一起使用。并非本指南的所有方面都适用于所有情况。本ASTM标准不代表或取代必须根据其判断给定专业服务的充分性的谨慎标准，也不应在不考虑项目的许多独特方面的情况下应用本文件。本文件标题中的“标准”一词仅表示该文件已通过ASTM共识程序获得批准。 1.7 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。 1.8 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。 1.9 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 在当代建筑中选择外部尺寸的石头，部分是因为其审美情趣。当污垢、污垢、飞灰、藻类和其他污染物聚集在石头表面时，美感会显著降低。 4.2 本指南旨在帮助那些希望保留新结构的原始外观或将石头覆盖的建筑恢复其原始颜色和外观的人。 4.2.1 请注意，清洁可能无法使变色或褪色的石头恢复其原始外观。 4.3 本指南可用作施工文件。

1.1 This guide describes materials and procedures which may be used to clean dimension stone exteriors as well as the conditions under which they may be used. It is intended to aid owners, maintenance supervisors and building managers, architects and engineers, and contractors in cleaning vertical exterior dimension stone on commercial, residential and institutional structures. This guide may also be helpful to those who wish to clean stone masonry on bridges, retaining walls, ramps, and plazas, and free-standing stone objects such as statuary, memorials and grave markers. 1.2 This guide relates primarily, to routine maintenance of the surface finish of exterior dimension stone. The techniques noted herein may not be appropriate or cost effective with regard to restoration of disfigured, severely soiled or stained stonework, or of stonework of particular historic importance. In cases where staining occurs on surfaces which have cultural, civic, historic or architectural significance, consultation with a specialist is recommended. 1.3 The user of this guide should also obtain and have on file at both the job site and the office Material Safety Data Sheets (MSDS) describing the nature of all chemical products utilized during the cleaning process. 1.4 A file of literature from the manufacturers of all products involved within the scope of each project should be available for reference. 1.5 These procedures are not intended for interior stonework. 1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process. 1.7 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. 1.8 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. 1.9 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 Exterior dimension stone is chosen for use in contemporary architecture in part because of its aesthetic appeal. Aesthetics can be significantly diminished when dirt, grime, fly ash, algae and other contaminants collect on the surface of stone. 4.2 This guide is intended to assist those who wish to preserve the original appearance of a new structure or to return a stone-clad building to its original color and appearance. 4.2.1 Note that cleaning may not be able to return discolored or faded stone to its original appearance. 4.3 This guide may be used as a construction document.