A Study on the Effect of Entrained Air Contents of Marine Concrete on the Properties of Freeze-Thawing Resistance and Chloride Migration

해양콘크리트의 연행공기량이 동결융해 저항성 및 염화물 확산특성에 미치는 영향에 관한 연구

This study investigates the effect of air contents on concrete properties, compressive strength, chloride migration coefficient and freeze-thaw resistance. Chloride migration and freeze-thawing test conducted in accordance with NT-BUILD 492 and pr-EN 12390-9, respectively. As a result, compressive strength reduced with air contents increase, but chloride migration coefficient more influenced by the water-binder ratios than air contents. Air contents of hardened concrete measured half times that of fresh concrete after mixing. Also, concrete scaling decreased with air contents increased.