Technical specification for corrosion monitoring and testing of steel reinforced concrete
1 Scope
This document specifies the composition, test point distribution, installation, commissioning, acceptance, and operation of the corrosion monitoring and testing system for steel reinforced concrete (hereinafter referred to as the "monitoring and testing system"), and describes the corrosion evaluation methods for steel reinforced concrete.
This document is applicable to the corrosion monitoring and testing, corrosion evaluation, and engineering acceptance of steel reinforcement in steel reinforced concrete structures. It can be used for steel reinforced concrete structures without cathodic protection and those with cathodic protection.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 7665 General terminology for transducers
GB/T 10123 Corrosion of metals and alloys - Vocabulary
GB/T 33373 Anticorrision - Electrochemical protection - Terminology
GB/T 38894-2020 Non-destructive testing - Electrochemical testing - General principles
GB 50168 Standard for construction and acceptance of cable line - Electric equipment installation engineering
GB/T 50344-2019 Technical standard for inspection of building structure
JGJ/T 152 Technical standard for test of reinforcing steel bar in concrete
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 7665, GB/T 10123 and GB/T 33373 as well as the following apply.
3.1
corrosion of steel reinforced concrete
degradation process of steel reinforcement in concrete structures under environmental action
3.2
self-corrosion potential of steel reinforcement
mixed potential of corrosion cell of steel reinforcement in concrete under the condition of no applied current polarization
3.3
corrosion rate of steel reinforcement
amount of corrosion per unit area and per unit time of steel reinforcement in concrete
Note: The corrosion rate of steel reinforcement can be expressed in the following three forms:
a) Loss in mass of steel reinforcement per unit area and per unit time;
b) Diameter thinning of steel reinforcement per unit area and per unit time;
c) Corrosion current per unit area and per unit time.
3.4
protection potential
electrode potential of steel reinforcement subjected to cathodic polarization after cathodic protection is applied to steel reinforced concrete
3.5
test area
one or more test areas on a structure or member to be arranged in a key or representative area according to the requirements of the testing method
3.6
test point
one or more sensor points buried in a key or representative location within a test area according to the requirements of the testing method
4 General requirements
4.1 Procedures and contents for monitoring and testing
4.1.1 The flow chart of the procedure for corrosion monitoring and testing of steel reinforced concrete is shown in Figure 1.
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 System
6 Test point distribution
7 Installation
8 Commissioning
9 Acceptance
10 Operation
11 Corrosion evaluation of steel reinforced concrete
Annex A (Informative) Construction acceptance record of monitoring and testing system for steel reinforced concrete
Bibliography
钢筋混凝土腐蚀监检测技术规范
1 范围
本文件规定了钢筋混凝土腐蚀监检测系统(以下简称“监检测系统”)的组成、测试点布设、安装、调试、验收、运行，描述了钢筋混凝土腐蚀的评价方法。
本文件适用于钢筋混凝土结构钢筋腐蚀的监检测、腐蚀评价和工程验收，可用于无阴极保护和有阴极保护的钢筋混凝土结构。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB/T 7665 传感器通用术语
GB/T 10123 金属和合金的腐蚀 术语
GB/T 33373 防腐蚀 电化学保护 术语
GB/T 38894-2020 无损检测 电化学检测 总则
GB 50168 电气装置安装工程电缆线路施工及验收标准
GB/T 50344-2019 建筑结构检测技术标准
JGJ/T 152 混凝土中钢筋检测技术标准
3 术语和定义
GB/T 7665、GB/T 10123和GB/T 33373界定的以及下列术语和定义适用于本文件。
3.1
钢筋混凝土腐蚀 corrosion of steel reinforced concrete
在环境作用下，混凝土结构中钢筋发生退化的过程。
3.2
钢筋自腐蚀电位 self-corrosion potential of steel reinforcement
在无外加电流极化条件下，钢筋在混凝土中腐蚀电池的混合电位。
3.3
钢筋腐蚀速率 corrosion rate of steel reinforcement
混凝土中钢筋单位面积、单位时间内腐蚀的量。
注：钢筋腐蚀速率有三种表示方法：
a) 单位面积、单位时间内钢筋损失的质量；
b) 单位面积、单位时间内钢筋直径减薄量；
c) 单位而积、单位时间内的腐蚀电流。
3.4
保护电位 protection potential
对钢筋混凝土施加阴极保护后，钢筋受阴极极化的电极电位。
3.5
测试区 test area
在一个结构或构件上，按检测方法要求，选择在重点或代表性区域布置的一个或者若干个检测区域。
3.6
测试点 test point
在一个测区内，按检测方法要求，选择在重点或代表性位置埋设一个或者若干个传感器的点位。
4 一般规定
4.1 监检测程序和工作内容
4.1.1 钢筋混凝土腐蚀监检测程序流程如图1所示。
