Graphene-base concrete resist and application thereof

A graphene and graphene technology, applied in the field of graphene-based concrete resist, can solve problems such as ignoring the corrosion resistance of sulfate radicals, achieve significant economic benefits, inhibit gel decomposition, and improve mechanical properties

Active Publication Date: 2017-05-31
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanism of action of concrete preservatives mentioned in the above invention patents mainly depends on the inorganic components to improve the compactness of concrete, while ignoring the problem of improving the sulfate attack resistance of concrete from the concrete structure itself

Method used

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  • Graphene-base concrete resist and application thereof
  • Graphene-base concrete resist and application thereof
  • Graphene-base concrete resist and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1) After stirring 100g of graphene oxide and 30L of deionized water evenly, ultrasonically disperse for 80min (ultrasonic power is 200W) to obtain a uniformly dispersed graphene oxide aqueous suspension;

[0066] 2) Place a mixture of 200 g of maleic anhydride and 400 mL of water in a water bath at 60° C., heat and stir for 50 min to obtain maleic acid. Take the graphene oxide aqueous suspension in step 1) and slowly add it dropwise to the maleic acid in step 2), and react for 60 minutes under heating in a water bath at 80°C to obtain maleic acid-modified graphene oxide;

[0067] 3) Add 200 g of triethanolamine dropwise to the maleic acid-modified graphene oxide solution in step 2), and react for 100 min under heating in a water bath at 80° C. After the reaction is completed, filter the reactant, and then use deionized water to After washing and repeated filtration to neutrality, functionalized graphene oxide was obtained, marked as A1.

Embodiment 2

[0069] 1) After stirring 100g of graphene oxide and 200L of deionized water evenly, ultrasonically disperse for 100min (ultrasonic power is 250W) to obtain a uniformly dispersed graphene oxide aqueous suspension;

[0070] 2) Place a mixture of 200 g of maleic anhydride and 600 mL of water in a water bath at 60° C., heat and stir for 35 min to obtain maleic acid. Take the graphene oxide aqueous suspension in step 1) and slowly add it dropwise to the maleic acid in step 2), and react for 60 minutes under heating in a water bath at 80°C to obtain maleic acid-modified graphene oxide;

[0071] 3) Add 150 g of triethanolamine dropwise to the maleic acid-modified graphene oxide solution in step 2), and react for 60 minutes under heating in a water bath at 80° C. After the reaction is completed, filter the reactant, and then use deionized water After washing, repeat filtration until neutral to obtain a functionalized graphene oxide solution, marked as A2.

Embodiment 3

[0073] 1) After stirring 200g of graphene oxide and 50L of deionized water evenly, ultrasonically disperse for 90min (ultrasonic power is 240W) to obtain a uniformly dispersed graphene oxide aqueous suspension;

[0074] 2) Place a mixture of 600 g of maleic anhydride and 800 mL of water in a water bath at 65° C., heat and stir for 45 min to obtain maleic acid. Take the graphene oxide aqueous suspension in step 1) and slowly add it dropwise to the maleic acid in step 2), and react for 90 minutes under heating in a water bath at 80°C to obtain maleic acid-modified graphene oxide;

[0075] 3) Add 250 g of triethanolamine dropwise to the maleic acid-modified graphene oxide solution in step 2), and react for 100 min under heating in a water bath at 80° C. After the reaction is completed, filter the reactant, and then use deionized water After washing, repeat filtration to neutrality to obtain functionalized graphene oxide, marked as A3.

[0076] 4) 70g dispersant was dissolved in ...

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Abstract

The invention discloses a graphene-base concrete resist and a preparation method thereof, a functionalized graphene oxide and a preparation method thereof, and a functionalized graphene and a preparation method thereof. The graphene-base concrete resist comprises the following raw materials in parts by weight: 20-60 parts of graphene carbon material, 10-50 parts of alcamine compounds, 2-8 parts of inorganic salt, 1-6 parts of expanding agent, 5-10 parts of filler, 0.1-0.5 part of air entraining agent and 5-50 parts of water. The graphene carbon material is graphene oxide or a graphene oxide-graphene mixture. The experimental research indicates that when the graphene concrete resist is used, the sulfate attack resistance coefficient of the concrete can reach 0.82 or above, thereby obviously prolonging the service life of the concrete material, and bringing in obvious economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, and in particular relates to a graphene-based concrete anticorrosion agent and its application. Background technique [0002] In recent years, concrete damage by sulfate corrosion has become an important factor affecting the service life of concrete engineering structures such as roads and bridges at home and abroad. The degree of damage of erosion is large and the speed is fast. When a concrete structure is attacked by sulfates, it will expand in volume, turn white on the surface, and gradually crack and peel off from the corners. At the same time, non-gel products will be generated, which will seriously soften the hardened cement paste and lose its cementing ability, which is manifested by a severe decrease in mechanical strength, and the concrete structure is in a brittle or even loose state. Therefore, great attention must be paid to the sulfate corrosion resistance of concrete. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B14/02C04B24/34C04B24/12C04B24/20C04B103/61
CPCC04B20/023C04B40/0039C04B2103/61C04B14/024C04B24/122C04B22/085C04B22/148C04B24/34C04B14/062C04B24/06C04B14/303C04B24/20C04B18/146C04B24/04C04B2103/0068C04B24/026C04B18/141
Inventor 郑雅轩张娟娟蒋晓峰赖健平瞿研
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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