Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The service life design of reinforced concrete structures requires models capable of reliably describing both the mechanisms of damage and its progression over time. For concrete exposed to chlorides, service life design typically disregards the onset of damage, i.e. the progress of corrosion of the reinforcing steel. Common service life design practice typically considers the end of the initiation phase of the degradation process as the design limit state. A method is proposed where a model for estimating the time to corrosion initiation is coupled with a model for estimating the time to corrosion induced cracking into a single limit state determination. An example is provided of a structural element that has been designed for the serviceability limit state of corrosion induced concrete cover cracking. The results show that the corrosion rate is a major factor for the coupled service life determination. Where fast corrosion is expected, service life extension is insignificant, and where slow corrosion rates are expected, service life extension can be significant.
Original languageEnglish
Title of host publicationXXIIIth Symposium on Nordic Concrete Research
PublisherNorsk Betongforening
Pages115-118
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
EventXXIII Nordic Concrete Research Symposium - Aalborg, Denmark
Duration: 21 Aug 201723 Aug 2017

Conference

ConferenceXXIII Nordic Concrete Research Symposium
CountryDenmark
CityAalborg
Period21/08/1723/08/17

Fingerprint

Service life
Corrosion
Plant life extension
Corrosion rate
Concretes
Concrete construction
Reinforced concrete
Degradation
Steel

Keywords

  • service life
  • limit state
  • design
  • modelling
  • deterioration
  • concrete cover
  • chloride ingress
  • corrosion
  • cracking
  • serviceability

Cite this

Bohner, E., & Ferreira, M. (2017). Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking. In XXIIIth Symposium on Nordic Concrete Research (pp. 115-118). Norsk Betongforening.
Bohner, Edgar ; Ferreira, Miguel. / Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking. XXIIIth Symposium on Nordic Concrete Research . Norsk Betongforening, 2017. pp. 115-118
@inproceedings{512564f57f2c4cdd8dd538ce9582b557,
title = "Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking",
abstract = "The service life design of reinforced concrete structures requires models capable of reliably describing both the mechanisms of damage and its progression over time. For concrete exposed to chlorides, service life design typically disregards the onset of damage, i.e. the progress of corrosion of the reinforcing steel. Common service life design practice typically considers the end of the initiation phase of the degradation process as the design limit state. A method is proposed where a model for estimating the time to corrosion initiation is coupled with a model for estimating the time to corrosion induced cracking into a single limit state determination. An example is provided of a structural element that has been designed for the serviceability limit state of corrosion induced concrete cover cracking. The results show that the corrosion rate is a major factor for the coupled service life determination. Where fast corrosion is expected, service life extension is insignificant, and where slow corrosion rates are expected, service life extension can be significant.",
keywords = "service life, limit state, design, modelling, deterioration, concrete cover, chloride ingress, corrosion, cracking, serviceability",
author = "Edgar Bohner and Miguel Ferreira",
year = "2017",
language = "English",
pages = "115--118",
booktitle = "XXIIIth Symposium on Nordic Concrete Research",
publisher = "Norsk Betongforening",
address = "Norway",

}

Bohner, E & Ferreira, M 2017, Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking. in XXIIIth Symposium on Nordic Concrete Research . Norsk Betongforening, pp. 115-118, XXIII Nordic Concrete Research Symposium, Aalborg, Denmark, 21/08/17.

Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking. / Bohner, Edgar; Ferreira, Miguel.

XXIIIth Symposium on Nordic Concrete Research . Norsk Betongforening, 2017. p. 115-118.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking

AU - Bohner, Edgar

AU - Ferreira, Miguel

PY - 2017

Y1 - 2017

N2 - The service life design of reinforced concrete structures requires models capable of reliably describing both the mechanisms of damage and its progression over time. For concrete exposed to chlorides, service life design typically disregards the onset of damage, i.e. the progress of corrosion of the reinforcing steel. Common service life design practice typically considers the end of the initiation phase of the degradation process as the design limit state. A method is proposed where a model for estimating the time to corrosion initiation is coupled with a model for estimating the time to corrosion induced cracking into a single limit state determination. An example is provided of a structural element that has been designed for the serviceability limit state of corrosion induced concrete cover cracking. The results show that the corrosion rate is a major factor for the coupled service life determination. Where fast corrosion is expected, service life extension is insignificant, and where slow corrosion rates are expected, service life extension can be significant.

AB - The service life design of reinforced concrete structures requires models capable of reliably describing both the mechanisms of damage and its progression over time. For concrete exposed to chlorides, service life design typically disregards the onset of damage, i.e. the progress of corrosion of the reinforcing steel. Common service life design practice typically considers the end of the initiation phase of the degradation process as the design limit state. A method is proposed where a model for estimating the time to corrosion initiation is coupled with a model for estimating the time to corrosion induced cracking into a single limit state determination. An example is provided of a structural element that has been designed for the serviceability limit state of corrosion induced concrete cover cracking. The results show that the corrosion rate is a major factor for the coupled service life determination. Where fast corrosion is expected, service life extension is insignificant, and where slow corrosion rates are expected, service life extension can be significant.

KW - service life

KW - limit state

KW - design

KW - modelling

KW - deterioration

KW - concrete cover

KW - chloride ingress

KW - corrosion

KW - cracking

KW - serviceability

M3 - Conference article in proceedings

SP - 115

EP - 118

BT - XXIIIth Symposium on Nordic Concrete Research

PB - Norsk Betongforening

ER -

Bohner E, Ferreira M. Extending service life by coupling the limit state of corrosion initiation and corrosion induced cracking. In XXIIIth Symposium on Nordic Concrete Research . Norsk Betongforening. 2017. p. 115-118