Construction Technology of Carbon Fiber Reinforcement for Concrete Elements

Compared with other reinforcement technologies, the construction technology of carbon fiber reinforcement has high advantages. It can greatly increase the strength value of concrete members without being affected by the construction environment and the shape of the reinforcement object.

Shantou China Merchants Port Belt Corridor Project


1 Case Overview

Shantou China Merchants Port Belt Corridor Project is located in Mashan Port District, which is located in Mashan, Haojiang District, Shantou City, adjacent to Huaneng Shantou Power Plant. The port area has a land area of 15×104m2, a coastline length of 1040m, a 3.5×104t coal berth, a length of 235m, a wharf front water depth of -11m, and a 1000t barge berth and a heavy cargo berth. The annual comprehensive passing capacity is 410×104t. Among them, the unloading capacity is 320×104t and the loading capacity is 90×104t. It is the largest coal loading and unloading terminal in eastern Guangdong.


2 Reinforcement scheme and material characteristics of carbon fiber cloth

(1) Reinforcement plan. Based on the actual situation of the area where the project is located, after the project manager, the project technical person in charge, and the project executive deputy manager's demonstration and economic feasibility analysis of the project, it was decided to adopt carbon fiber reinforcement construction technology.

(2) Material characteristics of carbon fiber cloth.

• Flexible
• High strength
• High modulus
• Easy to install
• Long shelf life
• Light self weight
• High toughness
• Anti high temperature
• Environmental-friendly
• Unidirectional carbon fiber fabric used for shear strengthening, confinement strengthening, flexural strengthening


3 Main construction content

(1) According to the on-site survey of the staff, it is found that the concrete components of the gallery and reprint building of this project have different degrees of damage, leakage, cracks, etc., and they must be reinforced in time.

(2) The concrete components of the gallery and reprint building have different degrees of damage, leakage, cracks, etc., and carbon fiber cloth is used to reinforce them in advance.

(3) Dismantle the corridors on the main wharf and approach bridge (the parts with enlarged cross-sections of BC1-2 and BC3-4), first use angle steel to reinforce, then use polymer sand to wrap and protect them.

(4) Remove the obstructive surrounding walls and then repair them.

(5) Repair and dispose of damaged parts such as plaster layer shedding, holes, pits, etc. appearing on the walls of corridors and reprinted buildings.

(6) Use carbon fiber cloth to strengthen all the beams and slabs of the corridor BC1-11.

(7) Replace the damaged, deformed, rusted and peeling steel railings in the gallery, and apply anticorrosive coating to the concrete surface of the gallery and the overall BC1-2 steel railings.


4 Analysis of construction characteristics and difficulties

4.1 Features

Due to the large number of wharf surface operations during the construction of this project, there are not only many sub-projects, but also cross-construction phenomena. Therefore, it is necessary to ensure the normal production and operation of the wharf to the greatest extent. This is not only a characteristic of this project, but also a fundamental requirement for the construction quality and progress of the project.


4.2 Difficulties

Everything has two sides. Although carbon fiber reinforced construction technology has many advantages such as reliability, economy and feasibility, there are still many important and difficult problems that need to be solved, which are embodied in the following aspects:

(1) It is easily affected by terminal production. Although in the construction process of this project, it is necessary to avoid affecting the normal production and operation of the terminal to the greatest extent. However, if there is a conflict between this project and the terminal's production and operation, it is still necessary to suspend all work of this project. This is mainly because the production and operation of the terminal will have varying degrees of impact on the progress and quality of the project. Forcibly facing up to difficulties will only cause a large number of work hours.

(2) The potential safety hazard is greater. In this project, the pasting of steel plates and the application of anticorrosive paint are all high-altitude operations, which poses a greater safety hazard. If the safety measures are not in place, it will cause irreparable economic losses to the construction enterprise at the lightest level, and at the worst it will bring serious threats to the life and safety of high-altitude workers.


5 Guiding Ideas for Construction Technology of Carbon Fiber Reinforcement

For those concrete components with good appearance, less steel corrosion, mild corrosion, and no cracks in the concrete protective layer, carbon fiber reinforcement only needs to be preventive reinforcement. Only in this way can the corrosion resistance of concrete components be improved in unfavorable environments. Because this type of reinforcement is structural reinforcement, there is no need to accurately calculate the required amount of carbon fiber cloth. However, for the phenomenon of severe corrosion and severe cracking of the protective layer of concrete components, when using carbon fiber cloth to reinforce, the number and size of the carbon fiber cloth should be strictly calculated based on the degree of corrosion of the concrete components. Improve the bending resistance and bearing capacity of concrete components. It should be noted that the fundamental purpose of carbon fiber reinforcement is to improve the performance and load-bearing capacity of concrete components, not to compensate for the loss of steel.


6 Conclusion

Compared with other reinforcement technologies, the construction technology of carbon fiber reinforcement has high advantages. It can greatly increase the strength value of concrete members without being affected by the construction environment and the shape of the reinforcement object. Therefore, carbon fiber construction technology should be popularized and adopted in the reinforcement construction of concrete members.


The products used in this casePeople who browsed this project also concern these products:

Back
Top
Close