Corrosion behavior of steel in alkali-activated fly ash mortars in the light of their microstructural, mechanical and chemical characterization

被引：102

作者：

Monticelli, C. ^{[1
]}

Natali, M. E. ^{[2
]}

Balbo, A. ^{[1
]}

Chiavari, C. ^{[3
]}

Zanotto, F. ^{[4
]}

Manzi, S. ^{[2
]}

Bignozzi, M. C. ^{[2
]}

机构：

[1] Univ Ferrara, Ctr Studi Corros & Met A Dacco, Via Saragat 1, I-44122 Ferrara, Italy

[2] Univ Bologna, Dipartimento Ingn Civile Chim Ambientale & Mat, Via Terracini 28, I-40131 Bologna, Italy

[3] Univ Bologna, CIRI MAM, Viale Risorgimento 2, I-40136 Bologna, Italy

[4] Univ Ferrara, Terra & Acqua Tech, Via Saragat 1, I-44122 Ferrara, Italy

来源：

CEMENT AND CONCRETE RESEARCH | 2016年 / 80卷

关键词：

Alkali activated cement; Corrosion; Chloride; Mechanical properties; Microstructure; CHLORIDE; CONCRETE; GEOPOLYMERS; TECHNOLOGY; DURABILITY; STRENGTH; PASTES; CEMENT;

D O I：

10.1016/j.cemconres.2015.11.001

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study concerns the corrosion behavior of steel in different room temperature cured alkali-activated fly ash mortars exposed to chloride solution. The corrosion process was monitored by polarization resistance and corrosion potential measurements and the results were interpreted in the light of a complete microstructural, mechanical and chemical characterization of the mortars. The most compact alkali-activated mortars have higher porosity and lower mechanical properties than a cement-based mortar (CEM), but the protectiveness afforded to the rebars is slightly higher than that obtained in CEM. The reason for this discrepancy is connected to a lower chloride content accumulated in the former mortar type and to a specific inhibition of the rebar corrosion afforded by the pore electrolyte in alkali-activated mortars. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：60 / 68

页数：9

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