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.
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机译：众所周知，在设计中忽略了受拉区中的混凝土。因此，合理的做法是在受拉区的混凝土中通过将其与聚苯乙烯泡沫塑料颗粒混合使用低抗压强度的混凝土。填充有混凝土颗粒的混凝土用发泡胶填充混凝土（SFC）命名。使用聚苯乙烯泡沫塑料的目的是减少天然骨料在混凝土生产中的使用，并减少混凝土结构的左重。聚苯乙烯泡沫塑料可以用作填充剂，以减少混凝土的体积，特别是在设计中忽略了混凝土截面的区域。为了研究使用SFC的钢筋混凝土梁的挠曲性能b，进行了一系列测试。试样为尺寸为15 cm x 25 cm x 300 cm的梁，普通混凝土抗压强度为25.8 MPa。横梁试样由普通钢筋混凝土横梁组成，在竖向和桁架系统加固的梁受拉区域中没有混凝土，而在竖向和桁架系统加固的梁受拉区域中则有SFC。本研究中使用的SFC含有30％的聚苯乙烯泡沫塑料体积分数。然后将梁试样放置在简单的支架上，并在中心跨距处使用两个集中荷载加载。结果表明，普通混凝土的最大弯曲荷载为38.8 kN，而采用竖向钢筋的受拉部分中无混凝土的梁的荷载减小了24.2 kN。在受拉部分使用无混凝土桁架加固的试样的最大载荷为36.0 kN，接近于正常梁试样。使用垂直和桁架系统加固对SFC为30％的梁进行的载荷试验分别具有38.2 kN和48.3 kN的最大载荷。可以得出结论，与普通钢筋混凝土梁相比，在混凝土梁受拉区中使用SFC表现出良好的一致性。与垂直加强筋相比，使用桁架系统加强筋可以增加梁的承载能力强度。
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