earticle

영어

Previous study on recycled aggregate(RA) has largely been limited to the manufacture of nonstructural-grade concrete due to undesirable physical properties of them such as, high water absorption leading to high water demand of concrete.
The restriction seriously limits its market and consequently diminishes the use of RA as a construction material. This paper presents the flexural behavior of beam made of recycled concrete substituted by both waste foundry sand(WFS) and recycled coarse aggregate replaced with fine and coarse aggregate concurrently. From the test, specimens with high tension reinforcement ratio not less than 0.75ρ b showed high ultimate strength decreasing linearly after peak point due to the compressive failure of concrete. In case of specimens with under 0.5ρ b there was not strength decrement until the end of test by showing plastic elongation of tension reinforcement.