The influence of frost attack on chloride transport in concrete

Miguel Ferreira (Corresponding author), Hannele Kuosa, Markku Leivo, Lasse Makkonen

Research output: Contribution to conferenceConference articleScientificpeer-review

Abstract

Research on the durability of reinforced concrete structures is focusing ever more on the combined effect of degradation mechanisms. While most of the research has been directed at combined carbonation and chloride penetration, recently some attention has been given to emulate combined degradation conditions, especially those existing in Nordic countries (frost attack/chloride penetration), with regards to the harsh environmental conditions. Frost attack of concrete affects the chloride penetration by reducing the concrete cover, and more importantly, by changing the characteristics of the surface and internal concrete due to cracking. Recent research has shown there to be a synergetic effect, but no steps have been taken to characterize and comprehend the mechanisms involved, and to develop a procedure to transfer this knowledge to the industry and into practise. To address this need, a research project was set up with the objective of: ascertaining how ice formation in the concrete pore structure influences the transport properties of chloride ions in un-cracked concrete; to establish the characteristics of chloride ions transport in concrete subject to frost attack; and integrate the effect of combined degradation mechanism into a service life model. In this paper the, the preliminary result of this research project are presented.
Original languageEnglish
Number of pages8
Publication statusPublished - 2014
EventRILEM International workshop on performance-based specification and control of concrete durability - Zagreb, Croatia
Duration: 11 Jun 201413 Jun 2014

Conference

ConferenceRILEM International workshop on performance-based specification and control of concrete durability
CountryCroatia
CityZagreb
Period11/06/1413/06/14

Fingerprint

Concretes
Degradation
Carbonation
Ions
Pore structure
Concrete construction
Service life
Transport properties
Ice
Reinforced concrete
Durability
Industry

Keywords

  • concrete
  • durability
  • degradation
  • chloride
  • freeze-thaw
  • frost attack
  • service life
  • migration
  • diffusion
  • scaling
  • internal cracking

Cite this

Ferreira, M., Kuosa, H., Leivo, M., & Makkonen, L. (2014). The influence of frost attack on chloride transport in concrete. Paper presented at RILEM International workshop on performance-based specification and control of concrete durability, Zagreb, Croatia.
Ferreira, Miguel ; Kuosa, Hannele ; Leivo, Markku ; Makkonen, Lasse. / The influence of frost attack on chloride transport in concrete. Paper presented at RILEM International workshop on performance-based specification and control of concrete durability, Zagreb, Croatia.8 p.
@conference{08ca67729b8849cc86139ff7481d9510,
title = "The influence of frost attack on chloride transport in concrete",
abstract = "Research on the durability of reinforced concrete structures is focusing ever more on the combined effect of degradation mechanisms. While most of the research has been directed at combined carbonation and chloride penetration, recently some attention has been given to emulate combined degradation conditions, especially those existing in Nordic countries (frost attack/chloride penetration), with regards to the harsh environmental conditions. Frost attack of concrete affects the chloride penetration by reducing the concrete cover, and more importantly, by changing the characteristics of the surface and internal concrete due to cracking. Recent research has shown there to be a synergetic effect, but no steps have been taken to characterize and comprehend the mechanisms involved, and to develop a procedure to transfer this knowledge to the industry and into practise. To address this need, a research project was set up with the objective of: ascertaining how ice formation in the concrete pore structure influences the transport properties of chloride ions in un-cracked concrete; to establish the characteristics of chloride ions transport in concrete subject to frost attack; and integrate the effect of combined degradation mechanism into a service life model. In this paper the, the preliminary result of this research project are presented.",
keywords = "concrete, durability, degradation, chloride, freeze-thaw, frost attack, service life, migration, diffusion, scaling, internal cracking",
author = "Miguel Ferreira and Hannele Kuosa and Markku Leivo and Lasse Makkonen",
year = "2014",
language = "English",
note = "RILEM International workshop on performance-based specification and control of concrete durability ; Conference date: 11-06-2014 Through 13-06-2014",

}

Ferreira, M, Kuosa, H, Leivo, M & Makkonen, L 2014, 'The influence of frost attack on chloride transport in concrete' Paper presented at RILEM International workshop on performance-based specification and control of concrete durability, Zagreb, Croatia, 11/06/14 - 13/06/14, .

The influence of frost attack on chloride transport in concrete. / Ferreira, Miguel (Corresponding author); Kuosa, Hannele; Leivo, Markku; Makkonen, Lasse.

2014. Paper presented at RILEM International workshop on performance-based specification and control of concrete durability, Zagreb, Croatia.

Research output: Contribution to conferenceConference articleScientificpeer-review

TY - CONF

T1 - The influence of frost attack on chloride transport in concrete

AU - Ferreira, Miguel

AU - Kuosa, Hannele

AU - Leivo, Markku

AU - Makkonen, Lasse

PY - 2014

Y1 - 2014

N2 - Research on the durability of reinforced concrete structures is focusing ever more on the combined effect of degradation mechanisms. While most of the research has been directed at combined carbonation and chloride penetration, recently some attention has been given to emulate combined degradation conditions, especially those existing in Nordic countries (frost attack/chloride penetration), with regards to the harsh environmental conditions. Frost attack of concrete affects the chloride penetration by reducing the concrete cover, and more importantly, by changing the characteristics of the surface and internal concrete due to cracking. Recent research has shown there to be a synergetic effect, but no steps have been taken to characterize and comprehend the mechanisms involved, and to develop a procedure to transfer this knowledge to the industry and into practise. To address this need, a research project was set up with the objective of: ascertaining how ice formation in the concrete pore structure influences the transport properties of chloride ions in un-cracked concrete; to establish the characteristics of chloride ions transport in concrete subject to frost attack; and integrate the effect of combined degradation mechanism into a service life model. In this paper the, the preliminary result of this research project are presented.

AB - Research on the durability of reinforced concrete structures is focusing ever more on the combined effect of degradation mechanisms. While most of the research has been directed at combined carbonation and chloride penetration, recently some attention has been given to emulate combined degradation conditions, especially those existing in Nordic countries (frost attack/chloride penetration), with regards to the harsh environmental conditions. Frost attack of concrete affects the chloride penetration by reducing the concrete cover, and more importantly, by changing the characteristics of the surface and internal concrete due to cracking. Recent research has shown there to be a synergetic effect, but no steps have been taken to characterize and comprehend the mechanisms involved, and to develop a procedure to transfer this knowledge to the industry and into practise. To address this need, a research project was set up with the objective of: ascertaining how ice formation in the concrete pore structure influences the transport properties of chloride ions in un-cracked concrete; to establish the characteristics of chloride ions transport in concrete subject to frost attack; and integrate the effect of combined degradation mechanism into a service life model. In this paper the, the preliminary result of this research project are presented.

KW - concrete

KW - durability

KW - degradation

KW - chloride

KW - freeze-thaw

KW - frost attack

KW - service life

KW - migration

KW - diffusion

KW - scaling

KW - internal cracking

M3 - Conference article

ER -

Ferreira M, Kuosa H, Leivo M, Makkonen L. The influence of frost attack on chloride transport in concrete. 2014. Paper presented at RILEM International workshop on performance-based specification and control of concrete durability, Zagreb, Croatia.