Influence of calcium nitrite inhibitor and crack width on corrosion of steel in high performance concrete subjected to a simulated marine environment

Pedro Montes, Theodore W. Bremner, Derek H. Lister

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The effects of calcium nitrite based corrosion inhibitor (CNI) and crack width on the corrosion process of steel reinforcing bars in high performance concrete were investigated. A 34full factorial design was developed considering water to cement ratio, fly ash percent, CNI and cracked condition as factors. The response was the corrosion current density measured using the linear polarization resistance technique. Small-scale concrete slabs containing steel reinforcement were cast in concrete with a cover depth of 20 mm. The slabs were subjected to a simulated marine environment with two cycles of wetting and drying per day. The specimens were also visually inspected on a regular basis. It was found that CNI alone, in general, has no effect in decreasing corrosion, and that the crack condition of the specimens strongly affects the corrosion process. A significant effect of crack width on corrosion was also found. Furthermore, non-detrimental effect of CNI on corrosion of specimens containing fly ash was detected. © 2003 Elsevier Ltd. All rights reserved.
Original languageAmerican English
Pages (from-to)243-253
Number of pages11
JournalCement and Concrete Composites
DOIs
StatePublished - 1 Apr 2004
Externally publishedYes

Fingerprint

High performance concrete
Steel
Corrosion inhibitors
Nitrites
Calcium
Corrosion
Cracks
Coal Ash
Fly ash
Concrete slabs
Wetting
Drying
Reinforcement
Cements
Current density
Concretes
Polarization
Water

Cite this

@article{b1d83eea22dd46188ead9e3c703f3832,
title = "Influence of calcium nitrite inhibitor and crack width on corrosion of steel in high performance concrete subjected to a simulated marine environment",
abstract = "The effects of calcium nitrite based corrosion inhibitor (CNI) and crack width on the corrosion process of steel reinforcing bars in high performance concrete were investigated. A 34full factorial design was developed considering water to cement ratio, fly ash percent, CNI and cracked condition as factors. The response was the corrosion current density measured using the linear polarization resistance technique. Small-scale concrete slabs containing steel reinforcement were cast in concrete with a cover depth of 20 mm. The slabs were subjected to a simulated marine environment with two cycles of wetting and drying per day. The specimens were also visually inspected on a regular basis. It was found that CNI alone, in general, has no effect in decreasing corrosion, and that the crack condition of the specimens strongly affects the corrosion process. A significant effect of crack width on corrosion was also found. Furthermore, non-detrimental effect of CNI on corrosion of specimens containing fly ash was detected. {\circledC} 2003 Elsevier Ltd. All rights reserved.",
author = "Pedro Montes and Bremner, {Theodore W.} and Lister, {Derek H.}",
year = "2004",
month = "4",
day = "1",
doi = "10.1016/S0958-9465(03)00043-X",
language = "American English",
pages = "243--253",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Influence of calcium nitrite inhibitor and crack width on corrosion of steel in high performance concrete subjected to a simulated marine environment

AU - Montes, Pedro

AU - Bremner, Theodore W.

AU - Lister, Derek H.

PY - 2004/4/1

Y1 - 2004/4/1

N2 - The effects of calcium nitrite based corrosion inhibitor (CNI) and crack width on the corrosion process of steel reinforcing bars in high performance concrete were investigated. A 34full factorial design was developed considering water to cement ratio, fly ash percent, CNI and cracked condition as factors. The response was the corrosion current density measured using the linear polarization resistance technique. Small-scale concrete slabs containing steel reinforcement were cast in concrete with a cover depth of 20 mm. The slabs were subjected to a simulated marine environment with two cycles of wetting and drying per day. The specimens were also visually inspected on a regular basis. It was found that CNI alone, in general, has no effect in decreasing corrosion, and that the crack condition of the specimens strongly affects the corrosion process. A significant effect of crack width on corrosion was also found. Furthermore, non-detrimental effect of CNI on corrosion of specimens containing fly ash was detected. © 2003 Elsevier Ltd. All rights reserved.

AB - The effects of calcium nitrite based corrosion inhibitor (CNI) and crack width on the corrosion process of steel reinforcing bars in high performance concrete were investigated. A 34full factorial design was developed considering water to cement ratio, fly ash percent, CNI and cracked condition as factors. The response was the corrosion current density measured using the linear polarization resistance technique. Small-scale concrete slabs containing steel reinforcement were cast in concrete with a cover depth of 20 mm. The slabs were subjected to a simulated marine environment with two cycles of wetting and drying per day. The specimens were also visually inspected on a regular basis. It was found that CNI alone, in general, has no effect in decreasing corrosion, and that the crack condition of the specimens strongly affects the corrosion process. A significant effect of crack width on corrosion was also found. Furthermore, non-detrimental effect of CNI on corrosion of specimens containing fly ash was detected. © 2003 Elsevier Ltd. All rights reserved.

U2 - 10.1016/S0958-9465(03)00043-X

DO - 10.1016/S0958-9465(03)00043-X

M3 - Article

SP - 243

EP - 253

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

ER -