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目前,建筑行业混凝土用钢材大都采用热轧(圆钢、螺纹钢)和冷拔钢丝两类。其中热轧钢筋强度较低,金属耗用量大,不经济。而且规格不全,标准上虽有φ6、φ8的螺纹钢筋,实际上几乎没有生产厂家,对用户很不方便。冷拔低碳钢丝虽有很高的抗拉强度,但因其表面光滑,与混凝土之间容易产生滑移,因而不能充分发挥强度。同时,冷拔钢
At present, the steel used for concrete in the construction industry is mostly hot-rolled (round steel, rebar) and cold drawn steel wire. Among them, the strength of hot-rolled steel bar is low, and the consumption of metal is large and it is not economical. Moreover, the specifications are not complete. Although there are φ6 and φ8 rebars on the standard, there are practically no manufacturers, and it is inconvenient for users. Cold-drawn low-carbon steel wire has high tensile strength, but due to its smooth surface, it easily slips with concrete, and therefore cannot fully exert its strength. At the same time, cold drawn steel