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无产阶级文化大革命以来,建筑部门采用的冷拔低碳钢丝预应力混凝土,数量日益增多,应用范围愈来愈广。冷拔低碳钢丝预应力混凝土具有生产工艺简单,设备易于自制,上马快,便于因地制宜、就地取材,有利于大搞群众运动和普及推广等优点。目前,我国冷拔低碳钢丝预应力混凝土数量已占预应力混凝土总量的一半以上,广泛应用于工业和民用建筑的楼板、屋面板、挂瓦板、檩条等中小型构件。在农村建筑中,也开始大量采用以代替木材,深受群众欢迎,走出了一条建筑业支援农业的广阔道路。实践证明,采用冷拔低碳钢丝的预应力混凝土结构代替普通钢筋混凝土结构,可节约钢材10～30%,节约混凝土25%,降低造价约10%。目前,每立米的冷拔低碳钢丝预应力
Since the proletarian cultural revolution, the number of cold drawn low carbon steel prestressed concrete used in the construction sector has been increasing and the scope of application has become wider. Cold-drawn low-carbon steel wire pre-stressed concrete has the advantages of simple production process, easy to self-manufactured equipment, quick implementation, easy adaptation to local conditions, and local materials, which is conducive to vigorously popularizing and popularizing. At present, China’s cold drawn low-carbon steel wire prestressed concrete accounts for more than half of the total amount of prestressed concrete, and is widely used in industrial and civil buildings such as floors, roof panels, hanging tiles, purlins and other small and medium-sized components. In rural construction, it has also begun to be used in large numbers to replace wood. It has been welcomed by the masses and has emerged from a broad road of support for agriculture in the construction industry. Practice has proved that the use of cold-drawn low carbon steel prestressed concrete structure instead of ordinary reinforced concrete structure, can save 10 to 30% of steel, save 25% of concrete, reduce the cost of about 10%. At present, prestressed cold-drawn low-carbon steel wire per cubic meter