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Graphene concrete and preparation process thereof

A graphene and concrete technology, applied in the field of building materials, can solve problems such as accelerated intrusion, corrosion of steel bars, shortening the service life of concrete structures, etc., and achieve the effects of reducing shrinkage, dense arrangement, and superior corrosion resistance

Inactive Publication Date: 2018-05-25
山东昇昀国际贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the defects of the concrete itself, there are many micro-cracks and pores inside the concrete.
The existence of pores and microcracks makes oxygen and water vapor after shrinkage of cement remain in the concrete, resulting in corrosion of steel bars; on the other hand, these cracks will also greatly accelerate the intrusion of some corrosive media such as chloride salts, sulfates, etc. Thus greatly shortening the service life of concrete structures

Method used

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  • Graphene concrete and preparation process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation technology of graphene concrete of the present invention, step is as follows:

[0029] 1) Preparation of lignosulfonate: Weigh 5g of industrial lignin, add 100mL of water and 0.2g of sodium hydroxide and stir; heat to 45°C, adjust the pH to 3, add 1mL of hydrogen peroxide with a concentration of 27% and 0.5 React with 1 g of ferrous sulfate for 1 hour, adjust the pH to 6; continue to heat up to 70°C and adjust the pH to 8, add 0.5g of ferric chloride, and react for 1 hour; continue to heat up to 85°C, add 1g of sodium sulfite; until the reaction is complete, then Stop stirring and heating, and cool to room temperature, spray dry to obtain lignosulfonate.

[0030] 2) Weigh by weight, raw materials: 150 parts of ordinary Portland cement with a strength grade of 42.5, 150 parts of sea sand, 225 parts of gravel with a particle size of 5-10 mm, 10 parts of silicon powder, grade I and specific surface area Greater than 400cm 2 / g, the density is 2.6~2....

Embodiment 2

[0035] A kind of preparation technology of graphene concrete of the present invention, step is as follows:

[0036] 1) Preparation of lignosulfonate: Weigh 5g of industrial lignin, add 100mL of water and 0.5g of sodium hydroxide and stir; heat to 55°C, adjust the pH to 5, add 2mL of 33% hydrogen peroxide and 0.7g React ferrous sulfate for 2 hours, adjust the pH to 7; continue to heat up to 80°C and adjust the pH to 9, add 1g of ferric chloride, and react for 1.5h; continue to heat up to 95°C, add 5g of sodium sulfite; until the reaction is complete, then stop Stir and heat, and cool to room temperature, spray dry to get lignosulfonate.

[0037] 2) Weigh by weight, raw materials: 220 parts of ordinary portland cement with cement strength grade of 42.5, 220 parts of sea sand, 330 parts of crushed stone with particle size of 10-20 mm, 40 parts of silicon powder, grade I Its specific surface area is greater than 400cm 2 / g, the density is 2.6~2.8g / cm 3 45 parts of fly ash, 5 pa...

Embodiment 3

[0042] A kind of preparation technology of graphene concrete of the present invention, step is as follows:

[0043] 1) Preparation of lignosulfonate aqueous solution: Weigh 5 g of industrial lignin, add 100 mL of water and 0.4 g of sodium hydroxide and stir; heat to 50° C., adjust pH to 4, add 1.5 mL of 30% hydrogen peroxide and React 0.6g of ferrous sulfate for 1.5h, adjust the pH to 6.5; continue to heat up to 75°C and adjust the pH to 8.5, add 0.8g of ferric chloride, react for 1.2h; continue to heat up to 90°C, add 3g of sodium sulfite. After the reaction is complete, stop stirring and heating, cool to room temperature, and spray dry to obtain lignosulfonate.

[0044] 2) Weigh by weight, raw materials: 180 parts of ordinary Portland cement with a strength grade of 42.5, 180 parts of sea sand, 250 parts of crushed stone with a particle size of 20-25mm, 20 parts of silicon powder, grade I, its ratio Surface area greater than 400cm 2 / g, the density is 2.6~2.8g / cm 3 20 par...

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Abstract

The invention relates to graphene concrete and a preparation process thereof and solves technical problems of poor durability and proneness to corrosion of concrete in the prior art. The graphene concrete is prepared from, by weight, 150-220 parts of cement, 150-220 parts of sea sand, 225-330 parts of gravels, 5-18 parts of lignosulfonate, 40-100 parts of water, 10-40 parts of silicon powder, 15-45 parts of coal ash, 2-5 parts of graphene, 3-6 parts of oxidized graphene, 1-2.5 parts of magnesium powder, 2-12 parts of polypropylene fibers, 5-15 parts of carbon fibers and 0.5-1 part of ethyleneglycol. The graphene concrete is widely applied to the field of building materials.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a graphene concrete and a preparation process thereof. Background technique [0002] Concrete has also become the material of choice for roads, dams, and bridges, as industrial development and urbanization accelerate. With the proposal of high-performance concrete, the durability of concrete has attracted more and more attention from all aspects. [0003] In the field of civil engineering, building materials represented by cement concrete are still the most widely used and most successful structural engineering materials. However, with the high-rise, large-scale and multi-functionalization of modern engineering structures, cement concrete, as the largest structural material, is gradually changing from traditional structural materials with only bearing capacity to green and sustainable, super composite, super Durability, high-strength and high-performance, high-function, intell...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/02C04B24/18C04B40/00C04B14/02C04B111/27C04B111/20
CPCC04B24/18C04B28/04C04B40/0028C04B2111/20C04B2111/27C04B2201/50C04B14/068C04B18/08C04B14/02C04B18/146C04B14/024C04B22/04C04B16/0633C04B14/386C04B24/026C04B38/02
Inventor 李正坤李文涛
Owner 山东昇昀国际贸易有限公司
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