混凝土中钢筋的阴极保护

[中文适用范围]： 本文件规定了新建和现有结构中水泥基混凝土中钢的阴极保护的性能要求。 它涵盖建筑和土木工程结构，包括嵌入混凝土中的碳钢钢筋和预应力钢筋。 它适用于无涂层钢筋和有机涂层钢筋。 它不适用于含有导电纤维（例如碳或钢）的钢筋混凝土。 本文件适用于建筑物或结构的暴露于大气、埋藏、浸没和潮汐构件中嵌入的钢。 本文件仅适用于混凝土中钢的阴极保护应用，其设计意图是并且可以证明满足 8.6 中规定的保护标准。 这需要向拟受保护的结构的所有部分提供 6.3 中规定的足够的性能监测系统，以评估 8.6 中标准的满足程度。 本文件不适用于用于修补修复以减少“初期阳极”影响的原电池或系统。 本文件也不适用于任何形式的阴极保护系统或其他电化学处理，这些系统要么不能满足 8.6 的要求，要么没有配备评估保护标准是否必要的性能监测系统（见 6. 3）。 满足 8.6 中规定的要求。 注 1：附录 A 给出了阴极保护原理及其在混凝土中钢的应用的指导。 注 2：本文件虽然不是专门针对除混凝土以外的任何电解质中的钢的阴极保护，但可以应用于其他水泥材料中的钢的阴极保护，例如在 20 世纪初的钢框架砌体中，砖和陶土覆盖的建筑物。 在此类应用中，在阴极保护的设计、材料和安装方面需要针对这些结构进行额外的考虑；然而，本文件的要求可以应用于这些系统。 [外文原描述]： This document specifies performance requirements for cathodic protection of steel in cement-based concrete, in both new and existing structures. It covers building and civil engineering structures, including carbon steel reinforcement and prestressed reinforcement embedded in the concrete. It is applicable to uncoated steel reinforcement and to organic-coated steel reinforcement. It is not applicable to reinforced concrete containing electrically conductive fibres (e.g. carbon or steel). This document applies to steel embedded in atmospherically exposed, buried, immersed and tidal elements of buildings or structures. This document is only applicable to the applications of cathodic protection to steel in concrete which are designed with the intention to, and can be demonstrated to, meet the criteria of protection specified in 8.6. This requires the provision of sufficient performance monitoring systems as specified in 6.3 to all parts of the structure intended to be protected, in order to assess the extent to which the criteria in 8.6 are met. This document does not apply to galvanic anodes or systems applied into patch repairs to reduce the effects of ‘incipient anodes’. This document does also not apply to any form of cathodic protection systems or other electrochemical treatments that either cannot meet the requirements of 8.6 or are not provided with the performance monitoring systems (see 6.3) that are necessary to assess whether the criteria of protection specified in 8.6 are met. NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete. NOTE 2 This document, while not specifically intended to address cathodic protection of steel in any electrolyte except concrete, can be applied to cathodic protection of steel in other cementitious materials such as are found, for example, in early 20 th century steel-framed masonry, brick and terracotta clad buildings. In such applications, additional considerations specific to these structures are required in respect of design, materials and installation of cathodic protection; however, the requirements of this document can be applied to these systems.