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, result

Method used

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  • Graphene concrete and preparation process thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0027] Example 1

[0028] The preparation process of graphene concrete of the present invention includes the following steps:

[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 pH to 3, add 1mL of 27% hydrogen peroxide and 0.5 g Ferrous sulfate reacts for 1 hour, adjust the pH to 6; continue to raise the temperature to 70°C and adjust the pH to 8, add 0.5g of ferric chloride, and react for 1 hour; continue to raise the temperature to 85°C and add 1g of sodium sulfite; until the reaction is complete, then Stop stirring and heating, cool to room temperature, spray dry, and obtain lignosulfonate.

[0030] 2) Weigh in parts by weight, raw materials: strength grade 42.5 ordinary Portland cement 150 parts, sea sand 150 parts, particle size 5-10mm crushed stone 225 parts, silica fume 10 parts, grade I and specific surface area More than 400cm 2 / g, density is 2.6~2.8g / cm 3 15 parts of fly...

Example Embodiment

[0034] Example 2

[0035] The preparation process of graphene concrete of the present invention includes the following steps:

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

[0037] 2) Measured in parts by weight, raw materials: cement strength grade 42.5 ordinary Portland cement 220 parts, sea sand 220 parts, crushed stone size of 10-20mm crushed stone 330 parts, silica fume 40 parts, grade I Its specific surface area is greater than 400cm 2 / g, density is 2.6~2.8g / cm 3...

Example Embodiment

[0041] Example 3

[0042] The preparation process of graphene concrete of the present invention includes the following steps:

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

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

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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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