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Summary:The invention relates to a composite steel bar and a manufacturing method in the field of buildings. The slow-bonding material uniformly covers the surface of the PSB steel bar; and the protective tube layer is arranged outside the slow-bonding material in a sleeving manner and is in contact with the slow-bonding material. The composite reinforcing steel bar has good corrosion resistance, the protection pipe of the composite reinforcing steel bar forms a hole channel by itself, construction can be conducted on site compared with a pre-tensioning method, the working procedures of hole channel reserving, grouting and hole sealing and the like are reduced compared with a post-tensioning method, the composite reinforcing steel bar is high in self-strength, large in inertia moment and large in flexural rigidity and can be reliably made into a reinforcing steel bar cage, and by controlling the final setting time of a slow-bonding material, the service life of the composite reinforcing steel bar is prolonged. The co
Bibliography:Application Number: CN202311864844