Several Factors Regarding Sustainability of Marine Concrete Structures

T. U. Mohammed, H. Hamada, N. Otsuki

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

Abstract

Several factors regarding sustninability of marine concrete structures are discussed based on detailed laboratory and several long-term exposure tests. The factors include voids at the steel-concrete interface. crack widths and autogeneous healing, blended cements. chemical admixtures, type of bars. and joints. Long-term exposure investigations were carried out utilizing the specimens exposed to the marine environment over 10 years. The following conclusions are drawn: 1. To enhance long-term dumhility, the steel-concrete interface should be free from voids: 2. Narrower cracks and joint surfaces are healed in the marine tidal environment with alkaline deposits. and thereby control the corrosion of steel bars at these locations; 3. Blended cement with high slag contenl shows the best performance for longterm durability compared to the normal portland cement and other investigated blended cements; 4. The napthalene group of chemical admixture shows the best performance for long-term durability compared to other investigated chemical admixtures; 5. Deformed bars are more prone to corrosion compared to plain bars; 6. Brushing-off the laitance and application of a mortar coat at the joint plane is very effective in enhancing long-term durability.

Original languageEnglish
Title of host publication6th CANMET/ACI
Subtitle of host publicationDurability of Concrete
EditorsV.M. Malhotra
PublisherAmerican Concrete Institute
Pages23-44
Number of pages22
ISBN (Electronic)9780870311130
Publication statusPublished - Jun 1 2003
Externally publishedYes
Event6th CANMET/ACI International Conference on Durability of Concrete - Thessaloniki, Greece
Duration: Jun 1 2003Jun 7 2003

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-212
ISSN (Print)0193-2527

Conference

Conference6th CANMET/ACI International Conference on Durability of Concrete
Country/TerritoryGreece
CityThessaloniki
Period6/1/036/7/03

All Science Journal Classification (ASJC) codes

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

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