基于修复效果和氢脆风险控制的双向电迁移参数优化方法（英文）

发布时间：2024-04-17 20:35

　　双向电迁移(BIEM)是一种新型的提升混凝土结构耐久性的电化学修复方法,可以实现除氯阻锈双重目的。但是,双向电迁移技术的修复效果和由此引起的钢筋氢脆风险取决于电化学参数的选择(电流密度和修复时间)和混凝土结构的服役条件(钢筋应力水平和混凝土保护层厚度)。本文通过系统的试验研究了上述因素间的关系:电流密度低于临界析氢电流密度时,无氢脆风险且电通量和除氯效果呈线性关系;当电流密度高于临界析氢电流密度时,电流密度、应力水平和修复时间的增加均会导致氢脆风险的增加。最后,本文建立了基于修复效果和氢脆风险控制的双向电迁移参数查询方法。

【文章页数】：16 页

【文章目录】：
1 Introduction
2 Experiments
    2.1 Specimen design
    2.2 Design of experimental system
    2.3 Hydrogen evolution recognition experiments
    2.4 BIEM treating controlled by hydrogen evolution
    2.5 BIEM treatment controlled by HE
    2.6 Testing method
        1)Test of Jc
        2)Test of chloride ions and inhibitor concentration
        3)Mechanical property test of steel bar
3 Experimental results
    3.1 Critical hydrogen evolution current density
    3.2 Details of dechlorination and corrosion inhibition
    3.3 Analysis of HE sensitivity
    3.4 Parameters selection based on BIEM effect and HE indexes
4 Discussions
    4.1 Relevance between HE indexes and electrochemical rehabilitation method
    4.2 Relevance between HE indexes and concrete structure operating condition
5 Conclusions



本文编号：3956887