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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Development of Admixtures for Highly Durable Concrete
Author(s): Y. Ohama, K. Demura, Y. Satoh, K. Tachibana, and Y. Miyazaki
Publication: Special Publication
Appears on pages(s): 321-342
Keywords: absorption; admixtures; carbonation; chlorides; concrete durability; dispersions; drying shrinkage; mortars (material); plastics, polymers and resins; strength; Materials Research
Abstract:The basic principle of preventing the deterioration of reinforced concrete structures is to inhibit the wet corrosion of reinforcing bars. According to the principle, the effective inhibition of the penetration of carbon dioxide, oxygen, water, and chloride ions is required to make highly durable concrete. Mortars are prepared with various contents of chemical admixtures and cement modifiers to meet such requirements, and tested for strength, water absorption, chloride ion penetration, and carbonation. From the test results of the mortars, effective admixtures are selected for concrete mixes. The strength, chloride ion penetration, carbonation, and drying shrinkage of concretes containing the selected admixtures are examined. In conclusion, the simultaneous addition of polymer dispersions and alkyl alkoxy silane at a polymer-cement ratio of 0.5 percent is recommended for the highly durable concrete.
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