Due to the increased use load of a factory office building, the second-floor hollow floor slab needs to be reinforced. The load is increased from the original design 2kg/m to 8kg/m2. According to the design requirements, it needs to be reinforced with sticky steel plate, and the steel plate is 6mm thick. When the hollow floor slab is made of bonded steel, due to the large number of circular holes in the prestressed hollow slab, when the expansion bolts are used for compression, the expansion bolts driven into the circular holes are not easy to be anchored and fixed. After comparing multiple programs. After negotiating with the design, it was finally determined to be reinforced with carbon fiber(CFRP) wrap.

Technical Features

1) Compared with traditional reinforcement methods, bonding with carbon fiber wrap has many advantages

3) Matching resin

The function of the first two including the bottom resin, the leveling material and the sticking resin is to improve the bonding quality of the carbon fiber, while the function of the latter is to make the carbon fiber and the concrete form a composite whole and work together.

The prestressed concrete hollow slab structure reinforced with carbon fiber wrap can effectively improve the bearing capacity of the slab without large deflection. And it does not significantly increase the net height of the layer, which is an ideal reinforcement method for concrete structures.