A Method for Strengthening Concrete Protective Door with Composite Material Grid

A technology for composite materials and protective doors, which is applied in doors for defense against harmful radiation, anti-war damage, and building maintenance. It can solve problems such as easy peeling and poor bonding performance, and achieve improved mechanical properties, effective bonding, The effect of high strength and rigidity

Active Publication Date: 2021-10-26
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding performance between polyurea and concrete is poor, and it is easy to peel off on the concrete surface, which is an important reason restricting the use of polyurea on protective doors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, strengthening newly-built concrete protective door structure;

[0026] A method for reinforcing a concrete protective door with a composite material grid, comprising the following steps:

[0027] The first step, the preparation of mixed solution, take appropriate amount of nano silicon dioxide (SiO 2 ), dried at 260°C for 4 hours in an air environment; placed in xylene, and ultrasonically oscillated for 1 hour to obtain the mixture;

[0028] The second step is the preparation of the modified resin. Pour the mixed solution prepared in the first step into the epoxy resin, heat it to 40°C in a vacuum environment, and stir it mechanically until the solvent is completely volatilized to obtain the modified resin; among them, the nanometer Silicon oxide (SiO 2 ), the mass ratio of xylene and resin is 1:8:100.

[0029] The third step is to chisel the surface of the concrete protective door, remove the floating layer until the hard concrete layer is exposed, and...

Embodiment 2

[0033] Embodiment 2, strengthening the old concrete protective door structure;

[0034] A method for reinforcing a concrete protective door with a composite material grid, comprising the following steps:

[0035] The first step, the preparation of mixed solution, take appropriate amount of nano silicon dioxide (SiO 2), dried at 300°C for 6 hours in an air environment; placed in acetone, and ultrasonically oscillated for 2 hours to obtain the mixture;

[0036] The second step is the preparation of the modified resin. Pour the mixed solution prepared in the first step into the epoxy resin, heat it to 50°C in a vacuum environment, and stir it mechanically until the solvent is completely volatilized to obtain the modified resin; among them, the nanometer Silicon oxide (SiO 2 ), the mass ratio of acetone and resin is 3:10:100;

[0037] The third step is to chisel the surface of the concrete protective door, remove the floating layer until the hard concrete layer is exposed, and ...

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Abstract

The invention relates to a method for reinforcing a concrete protective door with a composite material grid, and belongs to the technical field of protective door reinforcement. The technical scheme of the present invention is: a method for reinforcing concrete protection doors with composite material grids, comprising the following steps: the first step, preparation of mixed solution, second step, preparation of modified resin, third step, concrete protection The surface of the door is chiseled, and the floating layer is removed until the hard concrete layer is exposed, and then the epoxy resin primer is applied; the fourth step is to place the fiber-reinforced composite material grid horizontally; the fifth step is to spray polyurea on the surface of the protective door . The beneficial effect of the present invention is that, adopting the reinforcement technology of the concrete protective door of the present invention has a simple process, can be used to reinforce new protective doors and old protective doors, and can effectively improve the mechanical properties of the protective doors.

Description

technical field [0001] The invention relates to a method for reinforcing a concrete protective door with a composite material grid, which is used for reinforcing existing and newly-built concrete protective doors, and belongs to the technical field of protective door reinforcement. Background technique [0002] Protective doors are widely used in various fields such as the Navy, Air Force, Second Artillery, and civil air defense projects. They play the role of blocking the explosion shock waves generated by nuclear weapons and conventional weapons, and undertake the important responsibility of protecting life safety and important material safety in wartime. Key content of research in the field of protective engineering. Reinforced concrete protective doors are still the most used protective doors at present. However, reinforced concrete protective doors have problems such as bulky door bodies, inconvenient maintenance, and difficult repairs and rush constructions, which can...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E04G23/02E06B5/12E06B5/18C08K3/36C08L63/00C08L63/10C08L75/04
CPCC08K3/36C08K2201/011E04G23/0296E06B5/12E06B5/18C08L63/00C08L63/10C08L75/04
Inventor周寅智周健南徐迎邬建华金丰年孔新立王鹏陈艺顺
OwnerARMY ENG UNIV OF PLA