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Effects of interactions between leaching, frost action and abrasion on the surface deterioration of concrete

Rosenqvist, Martin LU ; Pham, Long-Wei; Terzic, Adnan; Fridh, Katja LU and Hassanzadeh, Manouchehr LU (2017) In Construction and Building Materials 149. p.849-860
Abstract

Surface deterioration of concrete occurs at the waterline of many hydraulic structures in contact with soft water in cold regions. Progressive disintegration of the surface leads to exposure of the coarse aggregate and ultimately of the reinforcing steel. Mechanical, physical and chemical processes could cause deterioration of concrete at the waterline. The objective of this study was to investigate experimentally the effects of interactions between leaching, frost action and abrasion on the surface deterioration at the waterline of hydro power structures. The test methods were designed to represent the environmental conditions at the existing Swedish hydro power structures as accurately as possible. Air-entrained concrete with a... (More)

Surface deterioration of concrete occurs at the waterline of many hydraulic structures in contact with soft water in cold regions. Progressive disintegration of the surface leads to exposure of the coarse aggregate and ultimately of the reinforcing steel. Mechanical, physical and chemical processes could cause deterioration of concrete at the waterline. The objective of this study was to investigate experimentally the effects of interactions between leaching, frost action and abrasion on the surface deterioration at the waterline of hydro power structures. The test methods were designed to represent the environmental conditions at the existing Swedish hydro power structures as accurately as possible. Air-entrained concrete with a water-to-cement ratio (w/c) of 0.54 and non-air-entrained concrete with a w/c ratio of 0.62 were used in the experiments. It was demonstrated that the amount of damage caused by interactions between the three degradation mechanisms exceeded the total amount of damage caused by the mechanisms separately. Moreover, leaching significantly amplified the effects of frost action and abrasion for both concrete mixes. Considering the exposure conditions at Swedish hydro power plants, it was concluded that leaching combined with frost action accounts for most of the superficial damage observed at the waterline of these structures.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Abrasion, Concrete, Durability, Frost action, Hydraulic structures, Leaching
in
Construction and Building Materials
volume
149
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:85020020063
  • wos:000405536800079
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2017.05.137
language
English
LU publication?
yes
id
39851340-04b2-45e9-b551-2557a795e376
date added to LUP
2017-06-26 11:19:00
date last changed
2018-01-07 12:08:57
@article{39851340-04b2-45e9-b551-2557a795e376,
  abstract     = {<p>Surface deterioration of concrete occurs at the waterline of many hydraulic structures in contact with soft water in cold regions. Progressive disintegration of the surface leads to exposure of the coarse aggregate and ultimately of the reinforcing steel. Mechanical, physical and chemical processes could cause deterioration of concrete at the waterline. The objective of this study was to investigate experimentally the effects of interactions between leaching, frost action and abrasion on the surface deterioration at the waterline of hydro power structures. The test methods were designed to represent the environmental conditions at the existing Swedish hydro power structures as accurately as possible. Air-entrained concrete with a water-to-cement ratio (w/c) of 0.54 and non-air-entrained concrete with a w/c ratio of 0.62 were used in the experiments. It was demonstrated that the amount of damage caused by interactions between the three degradation mechanisms exceeded the total amount of damage caused by the mechanisms separately. Moreover, leaching significantly amplified the effects of frost action and abrasion for both concrete mixes. Considering the exposure conditions at Swedish hydro power plants, it was concluded that leaching combined with frost action accounts for most of the superficial damage observed at the waterline of these structures.</p>},
  author       = {Rosenqvist, Martin and Pham, Long-Wei and Terzic, Adnan and Fridh, Katja and Hassanzadeh, Manouchehr},
  issn         = {0950-0618},
  keyword      = {Abrasion,Concrete,Durability,Frost action,Hydraulic structures,Leaching},
  language     = {eng},
  month        = {09},
  pages        = {849--860},
  publisher    = {Elsevier},
  series       = {Construction and Building Materials},
  title        = {Effects of interactions between leaching, frost action and abrasion on the surface deterioration of concrete},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2017.05.137},
  volume       = {149},
  year         = {2017},
}