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在建筑工程混凝土施工和混凝土预制构件的生产中,需要使用大量小直径钢筋。目前,国内生产的钢材中,小直径钢筋只有表面光滑的热轧钢筋和冷拔低碳钢筋。热轧光圆钢筋不仅强度较低,而且与混凝土的握裹力也差。因此在混凝土构件中应用耗钢量较大。冷拔底碳钢筋与热轧钢筋相比,强度上虽有较大的提高,但由于表面光滑,钢筋与混凝土之间的握裹力差,在构件受力后,钢筋与混凝土之间容易产生滑移。特别使用在
In the construction of concrete for concrete construction and the production of prefabricated concrete parts, a large number of small diameter rebars are required. At present, among the domestically produced steels, the small-diameter steel bars have only smooth hot-rolled steel bars and cold drawn low-carbon steel bars. Hot-rolled polished steel bars are not only less strong but also have poorer grip strength with concrete. Therefore, the application of steel consumption in concrete components is larger. Compared with hot-rolled steel bars, cold-drawn carbon steel bars have higher strength. However, due to the smooth surface, the grip strength between steel bars and concrete is poor. After the components are subjected to stress, they tend to occur between steel bars and concrete. Slip. Especially used in