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二、使用国外进口钢筋今参照国家建委颁发的《进口热轧变形钢筋应用若干规定》及编制说明,和某些国家的钢筋标准以及铁道部对于使用进口钢筋的某些规定,对此问题作一综合叙述。 (一)进口钢筋的基本知识 1.进口变形钢筋的特点进口钢筋基本上都是热轧变形钢筋,就是在它加热轧制过程中,钢筋的表面轧成纵肋和横肋,以此来保证它和混凝土之间有良好的结合作用。它和圆钢筋相比,具有抗裂
Second, the use of imported steel reference to the State Construction Commission issued a “number of provisions of the application of imported hot rolled deformed bar” and preparation instructions, and some countries of the standard reinforcement and the Ministry of Railways for the use of imported steel certain provisions of this issue Comprehensive description. (A) the basic knowledge of imported steel 1. The characteristics of imported deformed bar Imported rebar are basically hot deformed bar, that is, in its heating and rolling process, the surface of the bar rolled into vertical ribs and transverse ribs, in order to ensure It has a good combination with concrete. Compared with round bars, it has crack resistance