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Crack-resistant self-repairing reinforced concrete preparation method

A reinforced concrete and self-healing technology, which is applied in the field of building material preparation, can solve the problems of reduced impermeability, difficult to find cracks, and labor and material resources.

Pending Publication Date: 2019-10-22
梁家杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that due to the composition of the structure itself and the characteristics of the bearing capacity of the current traditional concrete materials, there are often some original micro-cracks inside. , the internal cracks will expand into cracks, which will reduce the mechanical properties of concrete and reduce the anti-seepage performance. However, the conventional repair method for concrete cracks mainly focuses on repairing afterwards: after artificially observing the formation of cracks, a series of remedial measures are taken to repair them. Repairing cracks, because these post-event repairing techniques consume a lot of manpower and material resources, and the cracks in some parts are difficult to find, a preparation method for crack-resistant self-repairing reinforced concrete is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] Preparation of the mixture:

[0030] In parts by weight, weigh 20 parts of polyacrylic resin, 5 parts of ethyl cellulose, 1 part of polyethylene glycol, 0.5 part of talcum powder and 0.5 part of diethyl phthalate and 50 parts of mass fraction of 95% The ethanol solution was put into a stirrer, stirred and mixed at a speed of 200r / min for 15min to obtain a mixed solution;

[0031] Preparation of coated catechol oxidase microcapsules:

[0032] Mix the mixed solution and catechol oxidase at a mass ratio of 2:1 and put it into a fluidized bed granulation dryer. The atomization pressure is 0.3MPa, the inlet air temperature is 35°C, and the outlet air temperature is 20°C. , the damper is atomized and granulated under the condition of 50%, and the discharging obtains coated catechol oxidase microcapsules, which are set aside;

[0033] Preparation of fermentation products:

[0034]Put the agar and chicken feathers into a pulverizer at a mass ratio of 1:3 and pulverize for 1 ...

example 2

[0042] Preparation of the mixture:

[0043] In parts by weight, weigh 22 parts of polyacrylic resin, 7 parts of ethyl cellulose, 1 part of polyethylene glycol, 0.7 part of talcum powder and 0.7 part of diethyl phthalate and 52 parts of mass fraction of 95% The ethanol solution was put into a stirrer, and stirred and mixed at a speed of 220r / min for 17min to obtain a mixed solution;

[0044] Preparation of coated catechol oxidase microcapsules:

[0045] Mix the mixed solution and catechol oxidase at a mass ratio of 2:1 and put it into a fluidized bed granulation dryer. The atomization pressure is 0.3MPa, the inlet air temperature is 37°C, and the outlet air temperature is 22°C. , the damper is atomized and granulated under the condition of 70%, and the discharging obtains coated catechol oxidase microcapsules, which are set aside;

[0046] Preparation of fermentation products:

[0047] Put the agar and chicken feathers into a pulverizer at a mass ratio of 1:3 and pulverize t...

example 3

[0055] Preparation of the mixture:

[0056] In parts by weight, weigh 28 parts of polyacrylic resin, 7 parts of ethyl cellulose, 1 part of polyethylene glycol, 0.7 part of talcum powder and 0.7 part of diethyl phthalate and 52 parts of mass fraction of 95% The ethanol solution was put into a stirrer, and stirred and mixed at a speed of 280r / min for 18min to obtain a mixed solution;

[0057] Preparation of coated catechol oxidase microcapsules:

[0058] Mix the mixed solution and catechol oxidase at a mass ratio of 2:1 and put it into a fluidized bed granulation dryer. The atomization pressure is 0.4MPa, the inlet air temperature is 42°C, and the outlet air temperature is 28°C. , the air door is atomized and granulated under the condition of 80%, and the coated catechol oxidase microcapsules are obtained from the discharging, which is set aside;

[0059] Preparation of fermentation products:

[0060] Put the agar and chicken feathers into a pulverizer at a mass ratio of 1:3 ...

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Abstract

The invention relates to a crack-resistant self-repairing reinforced concrete preparation method, and belongs to the technical field of building material preparation. According to the method, a polyacrylic resin and ethyl cellulose are used as film-forming materials; catechol oxidase is coated by a spraying method to form coated catechol oxidase microcapsules; protein-rich agar and chicken feathers are mixed and crushed, and then are subjected to sealed fermentation with microorganism-rich river bottom silt to obtain a fermentation product; polyvinyl alcohol and a concrete raw material are mixed, and a reaction is performed with 3,4-dihydroxybenzoic acid under high temperature conditions; and finally the reaction product, the fermentation product and the coated catechol oxidase microcapsules are mixed and stirred to finally prepare the crack-resistant self-repairing reinforced concrete. According to the present invention, the prepared crack-resistant self-repairing reinforced concretehas excellent crack resistance, can self-repair the generated micro cracks, and further has strong mechanical property and broad application prospects.

Description

technical field [0001] The invention relates to a preparation method of anti-crack self-repair reinforced concrete, which belongs to the technical field of building material preparation. Background technique [0002] As we all know, cement concrete cracking is one of the main forms of cement concrete main pavement failure, and it is also the main cracking form of other cement concrete structures (such as high-speed railway bridge beam slabs, pier bodies, and track slabs without cracks, etc.). Concrete will produce self-shrinkage during the hardening process; it will show elastic and inelastic strains under load; it will produce drying shrinkage related to water loss or thermal shrinkage related to cooling (or humidity shrinkage) when exposed to environmental temperature and humidity; when shrinking Constraint will cause complex stress and cause it to crack. Under certain conditions, which kind of shrinkage is dominant depends on many factors such as the size of the component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/38C04B111/34
CPCC04B28/04C04B40/0046C04B2111/343C04B2201/50C04B14/068C04B14/102C04B24/2623C04B24/06C04B24/2641C04B24/383C04B24/32C04B14/042C04B24/045C04B24/026C04B24/02C04B24/38C04B24/001C04B18/0418
Inventor 梁家杰
Owner 梁家杰
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