A kind of graphene functionalized cement-based material and preparation method thereof

A technology of cement-based materials and ene functions, which is applied in the field of graphene-functionalized cement-based materials and its preparation, can solve problems such as relatively difficult engineering applications, complicated operations, and difficult physical mixing, and achieve the goal of overcoming the physical ultrasonic dispersion process, Achieve uniform dispersion and improve compressive strength

Active Publication Date: 2022-05-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this preparation method is that the operation is complicated, and the purchase cost of commercial graphene is high. According to the current market price, the unit price of 1g graphene has reached about 800 yuan. Even the laboratory can only prepare small batches, and the engineering application has great potential difficulty
Therefore, graphene concrete preparation technology still faces problems such as high price and difficult physical mixing, which lead to its failure to be applied in engineering
[0003] Compared with graphene concrete, graphene oxide concrete, which is the most widely studied at present, saves the complicated process of surface modification in preparation, but it still needs to use ultrasonic equipment to prepare aqueous solution.

Method used

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  • A kind of graphene functionalized cement-based material and preparation method thereof
  • A kind of graphene functionalized cement-based material and preparation method thereof
  • A kind of graphene functionalized cement-based material and preparation method thereof

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preparation example Construction

[0024] The preparation method for in-situ growth of graphene functionalized cement-based material of the present invention comprises the following steps:

[0025] Step 1, mixing cement powder and carbon source for 12-72h to make it evenly mixed; wherein, the carbon source is glucose, sucrose, wheat straw powder or corn stalk powder, and the mass of graphene obtained accounts for 3% of the total mass of cement powder and carbon source %-10%, wherein the yields of carbon source glucose, sucrose, wheat straw powder and corn straw powder to generate graphene are 5%, 5%, 4% and 4.5%, respectively.

[0026] Step 2, put the mixture of carbon source and cement thoroughly stirred in step 1 into a high-temperature furnace, raise the temperature of the high-temperature furnace to 500-700 degrees, and maintain the temperature for 0.5-10 hours.

[0027] Step 3, after naturally cooling to room temperature, the fired sample is taken out of the muffle furnace.

[0028] Step 4, pour the fired...

Embodiment 1

[0032] Step 1, stirring and mixing cement powder and glucose for 24 hours to make them evenly mixed; wherein, the mass of glucose accounts for 3% of the total mass of cement powder and glucose.

[0033] Step 2, put the mixture of carbon source and cement thoroughly stirred in step 1 into a high-temperature furnace, raise the temperature of the high-temperature furnace to 550 degrees, and keep the temperature for 4 hours.

[0034] Step 3, after naturally cooling to room temperature, the fired sample is taken out of the furnace.

[0035] Step 4, pour the fired mixture and polycarboxylate superplasticizer powder into a blender and stir for 10 minutes.

[0036] Step 5, the net slurry of the material obtained in step 4 is prepared into a standard 50mm 3 As for the module, the prepared module was cured for 14 days according to the standard for testing mechanical properties.

Embodiment 2

[0038] Step 1, stirring and mixing cement powder and glucose for 24 hours to make them evenly mixed; wherein, the mass of glucose accounts for 6% of the total mass of cement powder and glucose.

[0039] Step 2, put the mixture of carbon source and cement thoroughly stirred in step 1 into a high-temperature furnace, raise the temperature of the high-temperature furnace to 550 degrees, and keep the temperature for 4 hours.

[0040] Step 3, after naturally cooling to room temperature, the fired sample is taken out of the furnace.

[0041] Step 4, pour the fired mixture and polycarboxylate superplasticizer powder into a blender and stir for 10 minutes.

[0042] Step 5, the net slurry of the material obtained in step 4 is prepared into a standard 50mm 3 As for the module, the prepared module was cured for 14 days according to the standard for testing mechanical properties.

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Abstract

The invention discloses a graphene functionalized cement-based material and a preparation method thereof, comprising the following steps: step 1, stirring and mixing cement powder and carbon source evenly; step 2, mixing the mixture of carbon source and cement powder obtained in step 1 Put it into a high-temperature furnace, raise the temperature of the high-temperature furnace to 500-700 degrees for calcination, and obtain a graphene-functionalized cement-based material. The present invention mixes the carbon source and the cement material uniformly, and realizes the in-situ growth of graphene in the cement matrix under the environment of 500-700° C. The basic components of cement finally improve the compressive strength of cement materials, overcome the cumbersome chemical modification and physical ultrasonic dispersion process of the original technical method, and reduce the preparation cost.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a graphene functionalized cement-based material and a preparation method thereof. Background technique [0002] The application of graphene to modified cement materials is a class of functional materials with the most application potential. The existing graphene concrete preparation method is mainly to modify the surface of commercial graphene, use high-power ultrasonic dispersion equipment to prepare temporarily stable graphene aqueous solution, and then add the mixed solution to the cementitious material for concrete mixing. The problem with this preparation method is that the operation is complicated, and the purchase cost of commercial graphene is high. According to the current market price, the unit price of 1g graphene has reached about 800 yuan. Even the laboratory can only prepare small batches, and the engineering application has great potentia...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B22/02C04B2103/302
Inventor姚尧张震宇刘虎曾涛
OwnerXI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY