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建筑业是我国经济的支柱行业,也是钢材消费大户。在我国现有的横列式小型线材轧机上,热轧Φ12mm以下的螺纹钢筋比较困难,Φ6～Φ12mm的建筑钢筋均为热轧光圆钢筋,热轧光圆钢筋用于建筑中,强度较低,而延伸率过高,综合性能不合理,造成钢材浪费,同时使混凝土构件的抗震性差,安全储备不足。而Φ4～Φ5mm等一些更小规格的钢筋,则由热轧钢筋拉拔加工成光圆钢丝,它们与混凝土的握裹力小,延伸率较低,硅构件的抗震性差,安全储备不足,为此,建设部已发文在全国推广应用冷轧带肋钢筋。(螺纹钢筋)
Construction industry is the pillar industry of our economy and also a big consumer of steel. In China’s existing horizontal small-scale wire rod mill, hot rolled Φ12mm below the screw is more difficult, Φ6 ~ Φ12mm building rebar are hot rolled round bar, hot rolled round bar used in the construction of the building, the intensity is low, The elongation is too high, the overall performance is irrational, resulting in steel waste, while making the seismic resistance of concrete components poor, lack of safety reserves. While some smaller sizes such as Φ4 ~ Φ5mm are drawn by hot-rolled steel bars into round steel wires. Their holding strength with concrete is small, the elongation is low, the seismic performance of silicon components is poor, and the safety reserve is insufficient. In this regard, the Ministry of Construction has issued a document to promote the use of cold-rolled ribbed bar across the country. (Rebar)