Long-term chloride-induced corrosion monitoring of reinforced concrete coated with commercial polymer-modified mortar and polymeric coatings

被引：70

作者：

Brenna, A. ^{[1
]}

Bolzoni, F. ^{[1
]}

Beretta, S. ^{[1
]}

Ormellese, M. ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Chim Mat & Ingn Chim Giulio Natta, I-20131 Milan, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 48卷

关键词：

Coating; Concrete; Corrosion; Chloride; Diffusion; STEEL REINFORCEMENT; SURFACE-COATINGS; INHIBITORS; DURABILITY;

D O I：

10.1016/j.conbuildmat.2013.07.099

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The efficiency of four commercial concrete coatings (a polymer modified cementitious mortar and three elastomeric coatings) against chloride-induced corrosion is discussed by means of steel corrosion long-term monitoring and by chlorides penetration profiles in concrete. The cement-based coating shows the best effect on delay chlorides penetration in concrete by acting as a physical barrier in addition to concrete cover. Despite its lower polymer content, the higher thickness guarantees a longer time-to-corrosion with respect to organic coatings. Once corrosion has started, corrosion rate is lower in the presence of coatings, due to their ability to reduce water ingress in concrete.

引用

页码：734 / 744

页数：11

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