Durability of Concrete in Sea Water: Method of Accelerated Testing and Evaluation

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Title: Durability of Concrete in Sea Water: Method of Accelerated Testing and Evaluation

Author(s): Shinzo Nishibayashi, Kiyoshi Yamura, and Shoichi Inoue

Publication: Special Publication

Volume: 65

Issue:

Appears on pages(s): 351-378

Keywords: accelerated tests; concrete durability; corrosion resistance; dynamic modulus of elasticity; immersion tests (corrosion); sea water; shrinkage.

Date: 8/1/1980

Abstract:
The seawater resistance of concrete must be considered when it is used for construction on the sea-shore or in the ocean. This paper describes an accelerated test method for assessing durability by subjecting the concrete to repeated cycles of seawater immersion and oven-drying. Test were carried out to evaluate the procedure in which, in addition to visual observation, reduction in dynamic modulus and length changes of the concrete up to 200 cycles were measured. Resistance indicators are proposed which combine these factors. Among the variables included in the test specimens it was found that seawater resistance of concrete is mainly affected by the type of cement, the water-cement ratio, the mixing water (fresh or seawater) and the age at immersion (period of pre-curing) .