Steel corrosion behaviour in carbonated alkali-activated slag concrete

被引：125
|
作者：
Aperador, W. [2 ]
Mejia de Gutierrez, R. [2 ]
Bastidas, D. M. [1 ]
机构：
[1] CSIC, CENIM Natl Ctr Met Res, Madrid 28040, Spain
[2] Univ Valle, Composite Mat Grp, Cali, Colombia
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 09期
关键词：
Steel reinforced concrete; Alkali-activated cement; EIS; Mossbauer spectroscopy; Carbonation; FLY-ASH; RESISTANCE; STABILITY; MORTARS;
D O I：
10.1016/j.corsci.2009.05.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Steel bars embedded in an alkali-activated slag (AAS) concrete were exposed (after curing for 28 days) to an accelerated carbonation test (3% CO2, 65% relative humidity (RH), and 25 degrees C temperature) and a laboratory environment (0.03% CO2, 65% RH, and 25 degrees C). Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to identical experimental conditions. The corrosion behaviour of uncarbonated and carbonated AAS and OPC concretes was tested for different times, performing corrosion potential, linear polarization resistance, and electrochemical impedance spectroscopy measurements. Corrosion products were analysed using the Mossbauer technique. The main corrosion products found were magnetite (Fe3O4), wustite (FeO), and goethite (alpha-FeOOH). (C) 2009 Elsevier Ltd. All rights reserved.
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页码：2027 / 2033
页数：7
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