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Nano-material for freeze-thaw-resistant concrete and use method for nano-material

A technology of nano-materials and concrete, applied in the field of nano-materials, can solve the problems of low freezing point depression and freeze-thaw-resistant concrete that cannot meet the needs of roads, etc., and achieve the effect of increasing the anti-destructive strength, improving the anti-freeze performance, and reducing quality loss

Inactive Publication Date: 2020-01-24
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have certain limitations. Salts do not lower the freezing point of water much, and generally can only be maintained at a few degrees below zero without freezing.
In Northeast my country, especially in Heilongjiang, the lowest temperature in winter can reach minus 40°C, and seawater erosion and acid rain erosion lead to traditional freeze-thaw-resistant concrete that cannot meet the road needs in this area, so it is necessary to study a freeze-thaw-resistant concrete Using nano-materials, adding this material to concrete can not only improve the freeze-thaw resistance of concrete, but also have very good resistance to chloride ion corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet; the nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet loaded with titanium dioxide.

[0021] The preparation method of nanomaterials for freeze-thaw-resistant concrete comprises the following steps:

[0022] A. Disperse sodium acetate in deionized water, disperse evenly, then add aniline monomer for blending, the reaction temperature is 35°C, add ammonium persulfate aqueous solution dropwise, after the dropwise addition, continue to react for 12 hours, and stand still to obtain a template solution ;

[0023] B. Drop titanate into glacial acetic acid, mix evenly, then add long-chain alkylamine and mix evenly, and then mix evenly with template solution;

[0024] C. Transfer the material obtained in step B into a reaction kettle for reaction; after the reaction, it is cooled, filtered with suction, and spray-dried.

[0025] In the step A,...

Embodiment 2

[0030] A nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet; the nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet loaded with titanium dioxide.

[0031] The preparation method of nanomaterials for freeze-thaw-resistant concrete comprises the following steps:

[0032] A. Disperse sodium acetate in deionized water, disperse evenly, then add aniline monomer for blending, the reaction temperature is 20°C, add ammonium persulfate aqueous solution dropwise, after the dropwise addition, continue to react for 20h, stand still, and obtain a template solution ;

[0033] B. Drop titanate into glacial acetic acid, mix evenly, then add long-chain alkylamine and mix evenly, and then mix evenly with template solution;

[0034] C. Transfer the material obtained in step B into a reaction kettle for reaction; after the reaction, it is cooled, filtered with suction, and spray-dried.

[0035] In the step A, the ma...

Embodiment 3

[0040] A nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet; the nanometer material for freeze-thaw-resistant concrete is reticulated polyaniline nanosheet loaded with titanium dioxide.

[0041] The preparation method of nanomaterials for freeze-thaw-resistant concrete comprises the following steps:

[0042] A. Disperse sodium acetate in deionized water, disperse evenly, then add aniline monomer for blending, the reaction temperature is 40°C, add ammonium persulfate aqueous solution dropwise, after the dropwise addition, continue to react for 5 hours, and stand still to obtain a template solution ;

[0043] B. Drop titanate into glacial acetic acid, mix evenly, then add long-chain alkylamine and mix evenly, and then mix evenly with template solution;

[0044] C. Transfer the material obtained in step B into a reaction kettle for reaction; after the reaction, it is cooled, filtered with suction, and spray-dried.

[0045] In the step A, ...

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PUM

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Abstract

The invention discloses a nano-material for freeze-thaw-resistant concrete. The material is titanium dioxide loaded reticular polyaniline nanosheets. The titanium dioxide modified polyaniline nano-material is obtained through adopting non-toxic sodium acetate as a dopant, subjecting an aniline monomer to polymerization in deionized water at an appropriate temperature in the presence of a proper amount of initiator ammonium persulfate so as to obtain a tabular polyaniline nano-material with high specific surface area, and preparing titanium dioxide by taking the tabular polyaniline nano-material with high specific surface area as a template. According to the material, the freezing resistance of concrete can be improved through resisting volume contraction and expansion of the concrete, themass loss of the concrete can be obviously lowered on the premise of not affecting mechanical properties of the concrete, and the resistance to failure of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nanomaterial for freeze-thaw-resistant concrete and a use method thereof. Background technique [0002] With the rapid development of social economy, the durability requirements of concrete for buildings are constantly increasing, and the freeze-thaw resistance is an important durability index of concrete. At present, there are two main technical means to improve the freeze-thaw resistance of concrete: one is to lower the freezing point of water by adding some salts to the admixture, and the other is to relieve the ice swelling caused by the solid-liquid phase transition of water by entraining air stress. These two methods have certain limitations. Salts do not lower the freezing point of water much, and generally can only be maintained at a few degrees below zero without freezing. In Northeast my country, especially in Heilongjiang, the lowest temperature in winter can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B28/04C08G73/02C08K3/22B82Y40/00C04B111/20
CPCB82Y40/00C04B24/121C04B28/04C04B40/0046C04B2111/20C04B2201/50C08G73/0266C08K3/22C08K2003/2241C08K2201/011C04B14/062C04B2103/302C04B24/04C04B24/24C04B22/148C04B24/383C04B14/06C04B14/305
Inventor 王舜冯卓王柳燕谭庆国杨广宁王志宏李新祥苑东辉张大海安刚孙志友
Owner SHENYANG UNIV