雙向電遷移(BIEM)是一種新型的提升混凝土結(jié)構(gòu)耐久性的電化學(xué)修復(fù)方法,可以實(shí)現(xiàn)除氯阻銹雙重目的。但是,雙向電遷移技術(shù)的修復(fù)效果和由此引起的鋼筋氫脆風(fēng)險(xiǎn)取決于電化學(xué)參數(shù)的選擇(電流密度和修復(fù)時(shí)間)和混凝土結(jié)構(gòu)的服役條件(鋼筋應(yīng)力水平和混凝土保護(hù)層厚度)。本文通過(guò)系統(tǒng)的試驗(yàn)研究了上述因素間的關(guān)系:電流密度低于臨界析氫電流密度時(shí),無(wú)氫脆風(fēng)險(xiǎn)且電通量和除氯效果呈線性關(guān)系;當(dāng)電流密度高于臨界析氫電流密度時(shí),電流密度、應(yīng)力水平和修復(fù)時(shí)間的增加均會(huì)導(dǎo)致氫脆風(fēng)險(xiǎn)的增加。最后,本文建立了基于修復(fù)效果和氫脆風(fēng)險(xiǎn)控制的雙向電遷移參數(shù)查詢方法。

【文章頁(yè)數(shù)】：16 頁(yè)

【文章目錄】：
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



本文編號(hào)：3956887