CLC number: TD98
On-line Access: 2010-04-27
Received: 2009-07-22
Revision Accepted: 2009-11-16
Crosschecked: 2010-03-30
Cited: 2
Clicked: 6465
Ji-xiu Zhang, Heng-hu Sun, Yin-ming Sun, Na Zhang. Corrosion behavior of steel rebar in coal gangue-based mortars[J]. Journal of Zhejiang University Science A, 2010, 11(5): 382-388.
@article{title="Corrosion behavior of steel rebar in coal gangue-based mortars",
author="Ji-xiu Zhang, Heng-hu Sun, Yin-ming Sun, Na Zhang",
journal="Journal of Zhejiang University Science A",
volume="11",
number="5",
pages="382-388",
year="2010",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0900443"
}
%0 Journal Article
%T Corrosion behavior of steel rebar in coal gangue-based mortars
%A Ji-xiu Zhang
%A Heng-hu Sun
%A Yin-ming Sun
%A Na Zhang
%J Journal of Zhejiang University SCIENCE A
%V 11
%N 5
%P 382-388
%@ 1673-565X
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0900443
TY - JOUR
T1 - Corrosion behavior of steel rebar in coal gangue-based mortars
A1 - Ji-xiu Zhang
A1 - Heng-hu Sun
A1 - Yin-ming Sun
A1 - Na Zhang
J0 - Journal of Zhejiang University Science A
VL - 11
IS - 5
SP - 382
EP - 388
%@ 1673-565X
Y1 - 2010
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A0900443
Abstract: corrosion of steel rebar is the most important durability problem of reinforced concrete. The aim of this research was to investigate the corrosion behavior of steel rebar in simulated pore solutions and gangue-blended cement mortar. The simulated pore solutions were based on the pore solution composition of gangue-blended cement. The pH and Cl− concentration of simulated pore solutions had significant effects on corrosion potential. However, an increase in pH reduced the influence of Cl− concentration on corrosion potential. The corrosion behavior of steel rebar in gangue-blended cement is different from that in simulated solutions. The gangue cementitious mortar surrounding steel rebar provides stable passivity environments for steel, leading to a decrease in ion diffusion coefficients. Alternating current impedance (ACI) analysis results indicated that the indicator Rc for concrete resistivity is higher for gangue mortar than for ordinary Portland cement (OPC), which improves its corrosion potential. The results from energy dispersive X-ray analysis (EDX) showed more aluminates and silicates at the rebar interface for gangue-blended cement. These aluminates improve the chloride binding capacity of hydrates in mortar, and increase the corrosion protection of steel rebar.
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