Abstract:
This study aims to analyze the Stiffness, ductility and moment capacity of hollow core that placing in tension
zone of reinforced concrete beams. The hollow was filled with plastic bottle waste. The partial replacement of concrete
below the neutral axis by using different length of plastic bottles was discussed. The cross section is filled with plastic
bottles, in order to get a lighter structure, reduce the volume of concrete / cement and the reduction of environmental
pollution. This study used RC beams with concrete strength of 27MPa and dimensions of 150x350mm, with 3D16mm
longitudinal reinforcement with the yielding strength of 487MPa. Five type specimens are tested, consisting of control
beam (BN) and hollow beams type with length variation of 880mm (BR3A), 1760mm (BR3B) and 2640mm (BR3C). The
height of the hollow for each type was 1800mm (three layer bottles).
All beams are tested for their flexural characteristics with 4 loading points using an actuator with a maximum load of
1500kN. A load cell with a capacity of 200kN is used to measure the load. Three LVDT (Linear Variable Displacement
Transducers) are used to measure beam deflection. All data is recorded automatically using a data logger. The results
indicated that the moment capacity of reinforced concrete beam with hollow core using plastic bottles was almost same
with the normal beam. Moreover, the effect of the length of the hollow core was different significant of the stiffness and
ductility. The stiffness of the BR3A, BR3B and BR3C, respectively 93.40 %, 79.00 % and 67.53 % to stiffness of BN and
the ductility of the BR3A, BR3B and BR3C, respectively about 96.1%, 91.0% and 84.2 % to ductility of the BN.