Steel is the main material used as reinforcement in reinforced concrete structures. Naturally, the number of steels used rapidly increase every year. The increase has an effect on the availability of steel’s main raw materials which is iron ore, a non-renewable natural resource. Therefore, an alternative steel replacement material is needed. Bamboo is chosen as an alternative substitute for reinforcing steel in reinforced concrete structures. In this study, petung bamboo caps anchored using screw nails was used as flexible reinforcement in reinforced concrete beams. This study aimed to analyze the behavior of load and deflection relationships in the flexural capacity of bamboo reinforced concrete beams against steel reinforced concrete beams. There were 6 beams used as specimens, consisting of 2 bamboo reinforced concrete beams with 1cm long screws, 2 bamboo reinforcing beams with 2 cm long screw nails, and 2 beams with 12 mm diameter steel reinforcement as a control beam. The results showed the flexural strength of bamboo reinforced concrete beams with 1 and cm hook length was 44.32 kN and 46.98 kN or 48.64% and 51.56 compared to steel reinforced concrete beams with flexural strength values of 91.10 kN.
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