Abstract
This paper investigated ultimate bond strength of steel bar embedded in sea sand concrete under different curing environments. Total 24 test series of cylinder specimens D150 × 300 mm with embedded steel bar were experienced under pullout test. Two types of sand, normal sand and sea sand, were evaluated. All specimens were cured in normal water and sea water for 7, 14, 28, 90, 180, and 365 days. The results showed that the failure mode of all specimens was pullout mode and no corrosion was observed on the surface of steel bar embedded in sea sand concrete after 365 days curing in seawater. The ultimate bond strength developed rapidly at an early stage but slowly at later stage of curing. There were no significant differences in the ultimate bond strength between specimen cured in normal water and sea water. The full replacement of normal sand with sea sand had no significant effect on the ultimate bond strength between steel bar and concrete.
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