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Recurrent studies of chloride ingress in uncracked marine concrete at various exposure times and - elevations

Sandberg, Paul LU ; Tang, L and Andersen, A (1998) In Cement and Concrete Research 28(10). p.1489-1503
Abstract
Uncracked reinforced concrete slabs were field exposed mounted on a floating pontoon and partly submerged for 5 years at the Swedish west coast. The total chloride ingress was analysed at various exposure times at 3 elevations representing a submerged, a splash, and an atmospheric exposure zone. The concrete mixtures varied in w/c ratio, type of cement, and amount and type of pozzolan used in the binder. The data is unique as it represents recurrently measured total chloride penetration profiles at various exposure ages, providing a foundation for the prediction of chloride ingress in concrete in a given environment. The results after 5 years of exposure confirmed the expected inverse relationship between water-to-binder ratio and chloride... (More)
Uncracked reinforced concrete slabs were field exposed mounted on a floating pontoon and partly submerged for 5 years at the Swedish west coast. The total chloride ingress was analysed at various exposure times at 3 elevations representing a submerged, a splash, and an atmospheric exposure zone. The concrete mixtures varied in w/c ratio, type of cement, and amount and type of pozzolan used in the binder. The data is unique as it represents recurrently measured total chloride penetration profiles at various exposure ages, providing a foundation for the prediction of chloride ingress in concrete in a given environment. The results after 5 years of exposure confirmed the expected inverse relationship between water-to-binder ratio and chloride ingress. The use of 5–10% silica fume in the binder had a very positive effect on reducing the chloride ingress, but little or no benefit at all was found for concrete with fly ash in the binder as compared to the use of 5% silica fume. The chloride penetration rate as expressed by a calculated effective chloride diffusivity has a tendency to decrease over time. High- performance concrete with w/c ≤ 0.4 and a minimum of 5% silica fume added as a well dispersed slurry exhibited an effective chloride diffusivity in the range of 1 × 10−13 to 5 × 10−13 m2/s after 5 years exposure in the splash zone. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Pozzolan, Mixtures, Diffusion, Corrosion, Calculations, Chlorine compounds, Binders, Silica
in
Cement and Concrete Research
volume
28
issue
10
pages
1489 - 1503
publisher
Elsevier
external identifiers
  • Scopus:0032182213
ISSN
0008-8846
DOI
10.1016/S0008-8846(98)00124-0
language
English
LU publication?
yes
id
506441af-853f-4917-a90a-ee7dcbf8d724 (old id 1529272)
date added to LUP
2010-01-18 11:47:08
date last changed
2016-10-13 04:36:29
@misc{506441af-853f-4917-a90a-ee7dcbf8d724,
  abstract     = {Uncracked reinforced concrete slabs were field exposed mounted on a floating pontoon and partly submerged for 5 years at the Swedish west coast. The total chloride ingress was analysed at various exposure times at 3 elevations representing a submerged, a splash, and an atmospheric exposure zone. The concrete mixtures varied in w/c ratio, type of cement, and amount and type of pozzolan used in the binder. The data is unique as it represents recurrently measured total chloride penetration profiles at various exposure ages, providing a foundation for the prediction of chloride ingress in concrete in a given environment. The results after 5 years of exposure confirmed the expected inverse relationship between water-to-binder ratio and chloride ingress. The use of 5–10% silica fume in the binder had a very positive effect on reducing the chloride ingress, but little or no benefit at all was found for concrete with fly ash in the binder as compared to the use of 5% silica fume. The chloride penetration rate as expressed by a calculated effective chloride diffusivity has a tendency to decrease over time. High- performance concrete with w/c ≤ 0.4 and a minimum of 5% silica fume added as a well dispersed slurry exhibited an effective chloride diffusivity in the range of 1 × 10−13 to 5 × 10−13 m2/s after 5 years exposure in the splash zone.},
  author       = {Sandberg, Paul and Tang, L and Andersen, A},
  issn         = {0008-8846},
  keyword      = {Pozzolan,Mixtures,Diffusion,Corrosion,Calculations,Chlorine compounds,Binders,Silica},
  language     = {eng},
  number       = {10},
  pages        = {1489--1503},
  publisher    = {ARRAY(0x85e0a30)},
  series       = {Cement and Concrete Research},
  title        = {Recurrent studies of chloride ingress in uncracked marine concrete at various exposure times and - elevations},
  url          = {http://dx.doi.org/10.1016/S0008-8846(98)00124-0},
  volume       = {28},
  year         = {1998},
}