Reinforcement method for fiber reinforced composite plastic and concrete

A fiber-reinforced composite and concrete technology, which is applied in the field of composite materials and building materials, can solve the problems of accelerating FRP peeling, affecting structural durability, and low grouting pressure, so as to expand the application range, optimize the force form, and prolong the service life. Effect

Inactive Publication Date: 2012-07-11
SHANDONG UNIV
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Problems solved by technology

However, there are still many problems in this technology, such as the anchorage strength of steel nails is small, and the preload cannot be applied to FRP.
In addition, the existence of structural cracks not only affects the durability of the structure, but also affects the bond strength of FRP, making the structure under a small load, resulting in stress concentration at the cracks, the...

Method used

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  • Reinforcement method for fiber reinforced composite plastic and concrete
  • Reinforcement method for fiber reinforced composite plastic and concrete
  • Reinforcement method for fiber reinforced composite plastic and concrete

Examples

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Effect test

Embodiment 1

[0044] A reinforcement method between FRP material and concrete, the steps are as follows:

[0045] (1) Concrete base surface treatment

[0046] ① Use a wire wheel or an angle grinder to remove the degraded layer of the surface of the concrete 1 (peeling, honeycomb, laitance, cement foaming due to corrosion or weathering, mold release glue) along the FRP design adhesion position and crack direction (5cm wide range) Layer, loose concrete debris, asphalt, etc.), and blow it with an air compressor to expose a clean, solid surface. After cleaning off the dust and loose scum on the base surface, clean the base surface with water or blow it with a hair dryer to ensure that the base surface is clean, free of oil and fully dry.

[0047] ②For the phenomenon of concrete 1 cracking, looseness, and corrosion of steel bars, first remove the loose parts, manually derust the corroded steel bars, and then use epoxy resin for anticorrosion treatment, and use epoxy resin cement as a leveling material...

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Abstract

The invention relates to a reinforcement method for fiber reinforced composite plastic and concrete, which includes: firstly performing crack grouting on the surface of concrete to be reinforced; secondly, drilling holes at set positions and embedding bolt reinforcing members according to the need of reinforcement; thirdly, applying base cement to the positions with FRP (fiber reinforced plastic) material and adhering the FRP material; fourthly, painting surface protection glue, mounting steel plates and fastening the bolts; and fifthly, performing surface coating. The fiber reinforced composite plastic and the concrete are technically integrated, optimized and modified according to respective characteristics of FRP and HB-FRP (hybrid bonded fiber reinforced plastic) technology and high (stable) pressure chemical grouting technology, so that the fiber reinforced composite plastic and the concrete have respective technical advantages, technical complementation and comprehensive improvement in reinforcing repair of defective components can be realized, material function utilization rate is increased greatly, the reinforcing effect is improved evidently, and the application range of the fiber reinforced composite plastic and the concrete can be widened greatly.

Description

Technical field [0001] The invention relates to a structure strengthening method, in particular to a strengthening method suitable for concrete and reinforced concrete structures, and belongs to the technical field of composite materials and building materials. Background technique [0002] With the rapid development of infrastructure construction in my country, concrete structures, masonry structures and wood structures in railway engineering, highway engineering, port engineering, water conservancy and hydropower projects are increasing. Affected by many factors such as design level, construction quality, environmental erosion, service time, etc., many structures have suffered serious diseases such as insufficient load-bearing capacity and component cracking, which not only seriously affects their structural functions and durability, but also affects the structural performance. Security has left a huge hidden danger. Especially for the houses and bridges constructed in the ear...

Claims

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Application Information

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IPC IPC(8): E02D37/00E02D29/16E04G23/02
Inventor 管延华宋修广庄培芝张宏博吴明磊刘玮龙
Owner SHANDONG UNIV
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