| Popis: |
It is well known that the concrete in the tension zone is neglected in the design. Therefore, it is reasonable if the concrete on the tension zone uses a low compressive strength concrete by mixing them with the Styrofoam grains. The concrete that filled with the concrete grains is named with Styrofoam Filled Concrete (SFC). Utilizing of Styrofoam aims to reduce the using of the natural aggregate in producing of concrete as well as to reduce the left-weight of the concrete structures. Styrofoam as waste can be used as a filler to reduce the volume of concrete, especially for areas where the concrete section is neglected in design. In an effort to study the flexural b of behavior of the reinforced concrete beams using SFC, a series of test were conducted. The specimens were beams with dimensions of 15 cm x 25 cm x 300 cm with normal concrete compression strength of 25.8 MPa. The beam specimens consisted of normal reinforced concrete beam, without concrete in tension area of beams using vertical and truss system reinforcement, with SFC in the tension zone of beams using vertical and truss system reinforcement. SFC used in this study were with 30% Styrofoam volume fractions. Beams specimens were then placed on the simple supports and loaded using two concentrated loads at the center span. Results indicated that the normal concrete had maximum flexural load of 38.8 kN, while the beams without concrete in the tension parts using vertical reinforcement had decreased load of 24.2 kN. The specimens using truss reinforcement without concrete in the tension parts had maximum load of 36.0 kN, close to the normal beam specimen. Loading test of the beam with SFC of 30% using vertical and truss system reinforcement had maximum load of 38.2 kN and 48.3 kN, respectively. It can be concluded that the use of SFC in tension zone of the concrete beams showed a good agreement in performance compared to the normal reinforced concrete beams. The use of truss system reinforcement can increase the strength of the loading capacity of the beam is significant compared to the vertical reinforcement. |
