High-impermeability cement-based composite material and method for preparing same

A technology of composite materials and permeability, which is applied in the field of high-permeability cement-based composite materials and its preparation, can solve the problems of poor corrosion resistance, slow strength development, and reduced service life, so as to improve impermeability and promote flow good compatibility

Inactive Publication Date: 2018-08-17
吴远怀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary cement-based materials are porous materials after curing, and there will be disadvantages such as low tensile strength, poor corrosion resistance, slow strength development, and poor impermeability during use. Under the action, its service life will be greatly reduced, and it is prone to cracking and penetration, which affects its use

Method used

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  • High-impermeability cement-based composite material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]The whiskers are magnesium hydroxide whiskers, silicon carbide whiskers, and calcium carbonate whiskers mixed in a weight ratio of 1:1:1;

[0028] Take rice straw and crop stalks to dry and crush them, place the crushed crop straws in a carbonization furnace device for carbonization, set the carbonization temperature to 300°C, and carbonization time to 83 minutes, and finally crush the carbonized crop straws into 150 meshes to obtain crop straw powder;

[0029] Preparation of chitosan nanogel: dissolving chitosan with 5% acetic acid aqueous solution to obtain chitosan solution, adding cyclodextrin to 10% aqueous solution of sodium hydroxide and stirring to prepare cyclodextrin Dextrin alkali solution, slowly drop the cyclodextrin alkali solution into the chitosan solution and stir evenly to obtain a mixed solution, adjust the pH of the mixed solution to 9.0 and then react, set the reaction temperature to 50°C, and the reaction time to 12h. The stirring speed is 100r / min...

Embodiment 2

[0034] Whiskers are magnesium hydroxide whiskers, silicon carbide whiskers, and calcium carbonate whiskers mixed in a weight ratio of 1:1:1

[0035] The sugarcane crop stalks are dried in the sun and crushed, and the crushed crop stalks are placed in a carbonization furnace for carbonization. The carbonization temperature is set at 310°C, and the carbonization time is 80 minutes. Finally, the carbonized crop stalks are crushed into 120 meshes to obtain crop straw powder;

[0036] Preparation of chitosan nanogel: Dissolve chitosan with an acidic aqueous solution mixed with 3% acetic acid and hydrochloric acid to obtain a chitosan solution, add cyclodextrin to a 10% aqueous solution of sodium hydroxide and stir to mix Prepare a cyclodextrin alkali solution, slowly drop the cyclodextrin alkali solution into the chitosan solution and stir evenly to obtain a mixed solution, adjust the pH of the mixed solution to 6.0 and then react, set the reaction temperature to 45°C, and the reac...

Embodiment 3

[0041] The whiskers are magnesium hydroxide whiskers, silicon carbide whiskers, and calcium carbonate whiskers mixed in a weight ratio of 1:1:1;

[0042] Take the corn crop stalks and dry them for crushing, place the crushed crop stalks in the carbonization furnace for carbonization, set the carbonization temperature at 350°C, and the carbonization time for 85 minutes, and finally crush the carbonized crop stalks into 140 meshes to obtain crop straw powder;

[0043] Preparation of chitosan nanogel: dissolving chitosan with 3% sulfuric acid acidic aqueous solution to obtain chitosan solution, adding cyclodextrin to 10% sodium hydroxide aqueous solution and stirring to prepare cyclopaste Fine alkali solution, slowly drop the cyclodextrin alkali solution into the chitosan solution and stir evenly to obtain a mixed solution, adjust the pH of the mixed solution to 7.0 and then react, set the reaction temperature to 40°C, and the reaction time to 10.5h. The stirring speed is 120r / m...

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Abstract

The invention relates to a high-impermeability cement-based composite material and a method for preparing the same. The high-impermeability cement-based composite material comprises, by weight, 20-30parts of 525 white cement, 40-60 parts of quartz sand, 18-20 parts of titanium dioxide powder, 10-12 parts of fly ash, 5-15 parts of chitosan nanogel, 3-5 parts of polyacrylate emulsion, 1-10 parts ofpitchstone vitrified micro-spheres, 0.5-2 parts of PVA (polyvinyl alcohol) celluloses, 6-8 parts of ionic liquid, 10-12 parts of crop straw powder, 3-6 parts of clay, 3-5 parts of diatomaceous earth,3-5 parts of maleic anhydride, 1-3 parts of whiskers, 3-6 parts of silane coupling agents, 0.5-2 parts of cellulose ether, 0.3-2 parts of redispersible latex powder, 0.1-3 parts of superplasticizers,0.5-2 parts of inorganic pigment and 60-70 parts of water. The method includes preparing composite materials from the maleic anhydride, the clay, the diatomaceous earth and the PVA celluloses; mixingand stirring the composite materials and other raw materials with one another to obtain the high-impermeability cement-based composite material which is a product.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a high-permeability cement-based composite material and a preparation method thereof. Background technique [0002] Cement-based composite materials are based on Portland cement, reinforced with alkali-resistant glass fiber, general-purpose synthetic fiber, various ceramic fibers, high-performance fibers such as carbon and aramid fibers, metal wires, and natural plant fibers and mineral fibers. The composite material formed by adding fillers, chemical additives and water through the composite process has high toughness and strength, and its performance is better than ordinary concrete. [0003] As a new building material, cement soil has the advantages of good performance and low price. It is used in water conservancy, construction and mines, and has the functions of anti-seepage, soil retaining and reinforcement. wide range. However, ordinary cement-based materials are porous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/28C04B2201/50C04B14/06C04B14/305C04B18/08C04B24/00C04B24/2641C04B14/22C04B14/08C04B14/10C04B14/383C04B16/0641C04B18/24C04B24/04C04B24/383C04B24/42C04B24/24C04B2103/302C04B2103/54C04B24/006C04B24/005
Inventor 吴远怀
Owner 吴远怀
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