Strength Properties of Concrete using Non-Washed Recycled Coarse Aggregate

비세척된 재생 조골재 콘크리트의 강도특성

This paper describes the possibility to reuse concrete waste produced by demolition of reinforced concrete structures as aggregate for concrete from the viewpoint of strength. Concrete rubble obtained from the demolished buildings at Taejon were crushing machine to reuse as coarse aggregate. The strength properties, such as compressive strength, splitting tensile strength, bending strength and shear strength, of recycled and normal concrete were examined and compared experimentally when water cement ratio was varied. From the results of this study, it was thought that in case of non-washed aggregate concrete, strength properties of recycled coarse aggregate is similar to that of normal concrete, In W/C 55%~45%, stress-strain curve of recycled concrete shows more stable than that of normal concrete, while in W/C 35%, it shows brittle behavior.