1.1本指南仅适用于现有的历史砌体结构。在本指南中，历史砌石是指具有重大历史、建筑、文化或社会意义并由砌体材料建造的建筑。类似的技术和评估应用于非历史砌体，但本指南中未提及。 1.2本指南概述了重新粉刷历史砖石的程序，旨在为用户建立项目提供指导- 历史砖石重新粉刷的具体要求。 1.3本指南仅适用于砌块:砖、陶土、石头、铸石和铺设在砂浆中的混凝土砖，可能适用于也可能不适用于其他砌块。 1.4本指南介绍了中定义的重新打印（tuckpointing）。 1.5在考虑重新粉刷时，尤其是在具有艺术、建筑、文化或历史意义的砌体上，应寻求具有历史砌体和重新粉刷经验的专家的指导。 1.6本指南不涉及砌体上使用的勾缝样式或轮廓或其制作方法。 1.7可能影响砌体结构完整性的额外维修可能需要在执行任何工程之前完成结构稳定性分析。 1.8遵循本指南可能涉及危险材料、操作和设备。 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，并确定监管要求的适用性。 ====意义和用途====== 重新粉刷砌体可提高耐候性，减少渗水，保持结构和视觉完整性，并通过允许砂浆接缝排水，避免雨水在砂浆和砌块之间积聚和渗透，延长建筑物的使用寿命。 本指南根据以下参数选择最有效的方法，适用于重新涂装砌体: 4.2.1确定要重新涂漆的接头。 4.2.2现场砌体的评估。 4.2.3砂浆清除技术评估。 4.2.4确定适当的重涂砂浆。 4.2.5重涂砂浆的选择。 4.2.6确定工程实施方法。 4.2.7工程的目视检查。

1.1 This guide applies only to existing historic masonry construction. For purposes of this guide historic masonry is intended to refer to buildings that have significant historic, architectural, cultural or social meaning and are constructed of masonry materials. Similar techniques and evaluation should be employed for non-historic masonry, but are not addressed in this guide. 1.2 This guide outlines procedures for repointing historic masonry and is intended to provide guidelines for the user to establish project-specific requirements for repointing of historic masonry. 1.3 This guide only pertains to masonry units: brick, terra cotta, stone, cast stone, and concrete brick laid in mortar, and may or may not be appropriate for other masonry units. 1.4 This guide addresses repointing (tuckpointing) as defined in. 1.5 When considering repointing, especially on masonry of artistic, architectural, cultural, or historical significance, guidance from a specialist experienced in historic masonry and repointing should be sought. 1.6 This guide does not address pointing styles or profiles used on masonry or the methods of producing them. 1.7 Additional repairs that may impact the structural integrity of the masonry may necessitate that a structural stability analysis be completed prior to the execution of any work. 1.8 Following this guide may involve hazardous materials, operations, and equipment. 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 requirements prior to use. ====== Significance And Use ====== Repointing masonry improves weather resistance, reduces water penetration, maintains structural and visual integrity, and prolongs the life of the building by allowing a mortar joint to shed water and avoid the accumulation and penetration of rainwater between mortar and masonry units. This guide provides for the selection of the most effective methods appropriate for repointing masonry based upon the following parameters: 4.2.1 Determination of joints to be repointed. 4.2.2 Evaluation of in-situ masonry. 4.2.3 Evaluation of techniques for removal of mortar. 4.2.4 Determination of appropriate repointing mortar. 4.2.5 Selection of repointing mortar. 4.2.6 Establishing the method of execution of the work. 4.2.7 Visual inspection of the work.