earticle

영어

This paper presents studies of the long-term behavior of the beams with recycled aggregate in transfer ratio under sustained loading. In this experimental program, three beams with replacement level(0%, recycled coarse aggregate 100%, recycled fine aggregate 50%) were tested in long-term bending to evaluate flexural strengthening effect of recycled aggregate and flexural performance when the sustained load removed. The beam were designed with net span of 2,000㎜ and rectangular cross-section of 170㎜ width and 170㎜ effective depth. Observation were recorded regularly for 380days on sustained multiple load. The experimental results showed that reinforced concrete beams with recycled aggregate(water absorption : 1.86～3.64%) were about similar long-term bending flexural mode with natural aggregate concrete beam. And concrete beams with recycled aggregate were higher than natural aggregate concrete beam.