A Study on Ductility Capacity of Reinforced Concrete Beam without Shear Reinforcement Using Cockle Shells as Fine Aggregate

As a result of compressive strength, specimens having mixture rate of cockle shells of $15\%\;and\;20\%$ showed more increases of compressive strength than non-mixture specimens as age increases. Ductility capacity of specimens was higher in specimens mixing cockle shells than in specimens using general fine aggregates and specimen of $10\%$ of cockle shells was highest in ductility capacity. To sum up all experimental results, ductility capacity of specimen without shear reinforcement using mixture of cockle shell was higher than non-mixture specimen and it is considered that mixture of cockle shells up to $20\%$ as fine aggregate for concrete will be available. Continuous researches on durability, workability and economy of crushed cockle shells used for substitute fine aggregate of concrete will be needed.

고막 패각을 잔골재로 사용한 전단보강근이 없는 철근콘크리트 보의 연성에 관한 연구