Marine durability of 15-year old concrete specimens made with ordinary portland, slag, and fly ash cements

Tarek Uddin Mohammed, Toru Yamaji, Toshiyuki Aoyama, Hidenori Hamada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)

Abstract

Marine durability of 15-year old plain and reinforced concrete cylindrical specimens exposed in marine environments for 15 years is presented here. The specimens were made with ordinary portland, slag (Type A, 8 and C) and fly ash (Type B) cements. Water-to-cement ratios were 0.45 and 0.55. Compressive strength of concrete, corrosion of steel bars, and chloride-ion concentrations in concrete were evaluated. After 15-year of exposure, compressive strength of concrete increases compared to its 28-day's strength for the investigated cements, except fly ash cement. Slag cement of Type C shows the best performance against chloride ingress and corrosion of steel bars in concrete. Accumulation of chloride-ion at the surface of concrete made with slag and fly ash cements is observed. The presence of voids at the steel-concrete interface causes the formation of corrosion pits irrespective of the type of cement. The use of seawater as mixing water causes an earlier strength development at the 28-day and does not cause the strength of concrete to regress after 15-year of exposure. However, it causes more corrosion of steel bars at a lower cover depth. At the deeper cover depth, no significant corrosion of steel bars is found irrespective of the type of mixing water.

Original languageEnglish
Title of host publication7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete
PublisherAmerican Concrete Institute
Pages541-560
Number of pages20
ISBN (Electronic)9780870310263
Publication statusPublished - Jun 1 2001
Externally publishedYes
Event7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete - Chennai, India
Duration: Jul 22 2001Jul 27 2001

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-199
ISSN (Print)0193-2527

Conference

Conference7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete
Country/TerritoryIndia
CityChennai
Period7/22/017/27/01

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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