Technical background

For many years, the operation and safety of infrastructure has been a particular concern of relevant government departments and the public. Taking highway bridges as an example, due to years of overloaded operation, construction quality, earthquakes and other accidental damages, my country will usher in a wide range of bridge aging phenomena, and it is urgently needed to be strengthened and strengthened to extend the service life. 

CFRP has the advantages of light weight, easy construction, weather resistance, long life, etc. It is expected to gradually replace the traditional steel plate and reinforced concrete reinforcement technology. In addition, CFRP can also be used for the reinforcement and reinforcement of old buildings.

Technical content

CFRP plate is prepared by pultrusion method, the main process includes silking, glue matching, pultrusion molding, cutting, performance testing, etc.

Technical advantages and indicators

The traditional steel plate and reinforced concrete reinforcement technologies have defects such as weighted bridges and tunnels, building weight, complex construction, and corrosion resistance. CFRP plate reinforcement technology has the advantages of light weight, easy construction, weather resistance, and long life.

Due to the high price of raw materials, the current cost of CFRP plate is relatively high, but considering the above advantages, as far as full cost accounting is concerned, it is still competitive with traditional reinforcement technology. Especially with the advancement of carbon fiber cost reduction, CFRP plate reinforcement technology is expected to gradually replace traditional reinforcement technology.

Application demonstration and economic evaluation

Horse carbon fiber plate has been applied in the reinforcement and maintenance of Nanyang Tuohe Bridge in Henan Province, and users have reported good reinforcement effects.

By the end of 2014, the total number of highway bridges in my country had reached 757,100, and the number of dangerous bridges reached 79,600. It is estimated that the market scale of bridge reinforcement and maintenance will reach more than 100 billion yuan within 10 years. The average annual import volume of CFRP sheets for bridge and tunnel reinforcement in my country is more than 1 million square meters, about 120 million US dollars. This shows that the project has a broad market prospect.