Structural strengthening or insufficient strength of concrete
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Structural strengthening or insufficient strength of concrete
The lack of concrete strength caused by improper construction and use will reduce the bearing capacity and stiffness of the structure, increase the deflection and deformation, and reduce the crack resistance, seepage resistance and durability of the structure, which will affect the use of the structure.
Summary
The lack of concrete strength caused by improper construction and use will reduce the bearing capacity and stiffness of the structure, increase the deflection and deformation, and reduce the crack resistance, seepage resistance and durability of the structure, which will affect the use of the structure.
Performance of insufficient strength of concrete
Performance of insufficient strength of concrete
The strength of concrete is not enough, it will be accompanied by low impermeability and low durability, and more importantly, it will affect the bearing capacity of the structure. The main manifestations are three aspects:
1 reduce structural strength and straight down.
2 the crack resistance is poor and a large number of wide cracks are produced.
3 the deformation of the component is large enough to affect the normal use.
Cause of insufficient strength of concrete
Poor quality of raw materials
Improper mixing ratio of concrete
Incorrect construction technology
The test block is not made by standard maintenance or not made in accordance with the regulations
In order to improve the load-bearing capacity, stiffness, stability and crack resistance of the original member by adding the reinforced concrete to the outer section of the component section and adding the reinforced bar or structural reinforcement.The slenderness ratio and axial compression ratio can also be reduced for compression members. Therefore, it is often used for reinforcement of beams, columns, plates and foundations.
Steel plate strengthening
The sticking steel plate method is a reinforcing method for improving the bearing capacity of components by using structural glue to paste steel plates on the surface of concrete components.
With structural adhesive externally bonded FRP fabric or FRP lamiante to the surface of the reinforced component. The purpose of improving the bearing capacity and ductility of the structure is to use the high tensile strength and tensile modulus of the fiber composite material to improve the structure's bearing capacity and ductility.
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