Abstract
The utilization of steel as on construction material is very high, otherwise the main resource to product the steel, iron ore is un renewable. Therefore we have to find another material that can replace steel especially as reinforcement. Bamboo is a material that has a high tensile strength nearly equivalent to steel. Bamboo predicted can be replace steel on a simple structure. But, bamboo has a lack as a reinforcement, the texture is very sleek that weak the bonding between bamboo and concrete. Therefore, it should be treaded to strengthen the bonding, in this case we use notches. This experiment is purposed to determine the flextural capacity of concrete beam using Bamboo Petung Type U Notches 1 cm and 2 cm Wide with 15 cm Spacing Reinforcement.
The kind of bamboo that will be used in this experiment is bamboo petung. There will be 18 speciment of beam. There are three type of reinforcement that is 1 cm notches, 2 cm notche and steel, six speciment for every type. The dimension of the beam is 1700mm  x 110 mm x 150 mm. The concrete compression strength be conditioned 17,5 MPa minimum. The flexural test will be proceed at 28th days of concrete age using two point loading method.
The result of the test, flexural capacity of steel reinforced concrete beam is 567.5 kg.m. The flexural capacity of 1 cm notches reinforced concrete beam is 285.5 kg.m equal to 50.27 % flexural capacity of reinforced concrete beam. The flexural capacity of 2 cm notches reinforced concrete beam is 413.3 kg.m equal to 72.70 % flexural capacity of reinforced concrete beam.
Key word :flexural capacity, bamboo reinforcement, bamboo reinforcement concrete beam