Method for manufacturing fiber reinforced resin based composite reinforcements

Abstract

The invention discloses a method for manufacturing fiber reinforced resin based composite reinforcements, which comprises the following steps of: putting fibers in an impregnation device to carry out impregnation treatment; winding the fibers treated by the impregnation device by using a spiral winding device; putting the fibers subjected to winding by the spiral winding device into a sand adding device so as to add sand on the fibers; putting the fibers treated by the sand adding device into a gelling device for gelling; putting the fibers subjected to gelling into a curing device for curing; and putting the fibers subjected to curing into a post-curing device for post-curing, thereby obtaining a fiber reinforced resin based composite reinforcement. The fiber reinforced resin based composite reinforcement manufactured by using the method disclosed by the invention has the characteristics of electrical insulation, non-magnetism, good bonding property with cement concrete, acid resistance, alkali resistance, corrosion resistance, light specific gravity, high strength, weld-free continuous reinforcement, and the like.

Description

technical field [0001] The embodiment of the present invention relates to a method for manufacturing a fiber-reinforced resin-based composite bar, which belongs to the development of new materials in related fields such as civil engineering and transportation. Background technique [0002] Concrete structure is one of the most widely used building materials in the world. Its structure is reinforced with steel bars. The steel bars are protected by alkaline concrete with a pH value (hydrogen ion concentration index) between 11 and 13, so that reinforced concrete structures have A certain amount of durability. Reinforced concrete exposed to corrosive environments will intrude carbides and chlorides under certain conditions, making the concrete change from alkaline to neutral, and the passivation film of steel bars will be destroyed and corrosion will begin. The volume of the corroded steel bars is larger than that of the iron metal in the original tissue, thus forming a large ...

AI Technical Summary

Problems solved by technology

The volume of the corroded steel bars is larger than that of the iron metal in the original tissue, thus forming a large internal expansion force, causing cracking and spalling of the concrete, and finally causing the destruction of the building

[0003] According to statistics, the loss caused by corrosion of steel bars in the United States is as high as 70 billion U.S. dollars every year, and more than 200,000 of the nearly 600,000 bridges have structural defects, and nearly 100,000 bridges have serious corrosion of steel bars; Among the reinforced concrete structures, more than 1 / 3 of them need to be rebuilt or replaced due to the corrosion of steel bars; because sea sand is used as fine aggregate in concrete in many areas in Japan, steel bar corrosion has become a serious problem; The survey of reinforced concrete wharves shows that although the service life is only 7-16 years, the steel bars of 16 wharves are severely corroded; the survey of 22 small and medium-sized offshore structures in Zhenhai, Zhejiang shows that 967 components are due to steel bar corrosion. There are 538 cracks and damages along the reinforcement, accounting for 56% of the total number of components; Beijing Xizhimen Overpass was rebuilt in 1999 due to a large amount of corrosion of steel reinforcement, and its service life is less than 19 years

[0004] However, the above-mentioned measures are limited. After long-term analysis and research, fiber-reinforced composite bars are the most practical solution for roads, bridges, heavy-duty roads and Effective Measures for Corrosion of Reinforced Concrete Structures in Cold and Harsh Corrosion Environment Areas