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Treatment method for improving CFRP-steel plate bonding interface performance

A technology of interface performance and treatment method, applied in the direction of surface pretreatment bonding methods, chemical instruments and methods, adhesives, etc., can solve the problems of insufficient durability of CFRP-steel interface, and achieve strong competitive advantages and application value, matching Reasonable and scientifically designed effects

Pending Publication Date: 2021-03-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of long-term performance degradation of the interface of steel structures reinforced with CFRP plates in a corrosive environment, the present invention provides a treatment method for improving the performance of the CFRP-steel plate bonding interface, which is used in the reinforcement of steel structures reinforced with CFRP plates in civil engineering. Provide assistance for the application and promotion of the field, and solve the problems of insufficient durability of the CFRP-steel interface in the long-term actual service process

Method used

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  • Treatment method for improving CFRP-steel plate bonding interface performance
  • Treatment method for improving CFRP-steel plate bonding interface performance
  • Treatment method for improving CFRP-steel plate bonding interface performance

Examples

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Effect test

example 1

[0033] Environment settings for artificial seawater immersion: use the artificial seawater prepared at the ratio listed in Table 1, set the temperature at 40°C, and set the corrosion ages at 1 month, 3 months, and 6 months, respectively.

[0034] There are two types of specimens: (1) CFRP-steel single-shear specimens without any interface treatment measures (2) CFRP-steel single-shear specimens treated with interface performance improvement measures proposed by the present invention. The test results are shown in Table 2.

[0035] Table 1: Composition of artificial seawater

[0036]

[0037] Table 2: Artificial seawater corrosion test results

[0038]

example 2

[0040] Freeze-thaw cycle environment setting: adopt the quick-freeze method in the "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete (GB / T50082-2009)", the freeze-thaw cycle control temperature is +8℃~-20℃, each freeze-thaw cycle The cycle time is 5-6 hours. The number of freeze-thaw cycles was 100, 200, and 400, respectively.

[0041] There are two types of specimens: (1) CFRP-steel single-shear specimens without any interface treatment measures (2) CFRP-steel single-shear specimens treated with interface performance improvement measures proposed by the present invention. The test results are shown in Table 3.

[0042] Table 3: Results of freeze-thaw cycle corrosion test

[0043]

[0044] In order to compare the effect of the scheme of this case, CFRP-steel simple shear joints were selected as the research object, and two comparative experiments of Example 1 and Example 2 were carried out. From the results of Table 2 and Table 3, it ...

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Abstract

The invention relates to the technical field of FRP plate application, in particular to a treatment method for improving CFRP steel plate bonding interface performance, which specifically comprises the following steps: coatingthe surface of a steel plate with a silane coupling agent, adding a toughening agent into a bonding adhesive, and paving an insulating layer for preventing electrochemical corrosion in the middle of a bonding adhesive layer between the steel plate and a CFRP plate. According to the method, the durability of the interface of the reinforced steel structure externally pastedwith the CFRP plate in the corrosive environment can be effectively improved, the implementation process is simple, the effect is stable, popularization and application are easy, the treated CFRP steel interface can adapt to various complex corrosive environments, the service life is long, and the method has high competitive advantages and application value in the field of reinforced steel structures externally pasted with the CFRP plate.

Description

technical field [0001] The invention relates to the technical field of FRP plate application, in particular to a treatment method for improving the performance of CFRP-steel plate bonding interface. Background technique [0002] Carbon Fiber Reinforced Polymer / Plastic (CFRP for short) is a high-performance new composite material formed by mixing carbon fiber and resin matrix in a certain proportion and forming through a certain molding process. With the advancement of science and technology and the improvement of composite material technology, CFRP panels are more and more widely used in the field of civil engineering, especially the application of CFRP panels in the field of reinforcement due to their good durability, high strength, and convenient reinforcement methods It is more and more affirmed by people, especially in recent years, CFRP panels have been paid more and more attention in the field of reinforcement of concrete and steel structures. [0003] Compared with t...

Claims

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Application Information

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IPC IPC(8): C09J5/02C09J163/00C09J11/08B32B7/12B32B9/00B32B9/04B32B15/14B32B15/18B32B17/02B32B17/12B32B17/06B32B27/02B32B27/34B32B27/12B32B37/06B32B37/12B32B38/16
CPCC09J5/02C09J163/00C09J11/08B32B5/022B32B5/26B32B9/047B32B17/067B32B27/12B32B15/14B32B15/18B32B7/12B32B37/12B32B38/162B32B37/06B32B2038/002B32B2262/101B32B2262/10B32B2262/0269B32B2307/714
Inventor 庞育阳高丹盈温方正汤寄予谷志强
Owner ZHENGZHOU UNIV