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Graphene geopolymer material as well as preparation method, application and regeneration method thereof

A geopolymer and graphene technology, applied in cement production, etc., can solve the problems of difficult sludge treatment and high treatment cost, and achieve the effects of controllable coagulation time, good toughness and reduced material waste

Active Publication Date: 2020-06-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a graphene geopolymer material and its preparation method, application and regeneration method, which are used to solve the problems of difficult sludge treatment and high treatment cost

Method used

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  • Graphene geopolymer material as well as preparation method, application and regeneration method thereof
  • Graphene geopolymer material as well as preparation method, application and regeneration method thereof
  • Graphene geopolymer material as well as preparation method, application and regeneration method thereof

Examples

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Embodiment 1

[0053] The present embodiment carries out the preparation of graphene geopolymer material, and raw material comprises sludge 0.2kg, activated silica-alumina material calcined kaolin 0.597kg, alkali activator 0.2kg, graphene 0.001kg, tartaric acid 0.0005kg, potassium phosphate 0.0003kg, Naphthalene series water reducer 0.001kg (sodium sulfate content is 10wt%), preparation comprises the following steps:

[0054] 1) Put calcined kaolin into a container, add sludge and mix mechanically at 200rpm for 5min, then add graphene, tartaric acid, potassium phosphate and naphthalene-based water reducer and stir mechanically at 500rpm for 3min, stir well and then add alkali activator , with 100rpm mechanical stirring for 2min to obtain a slurry;

[0055] 2) Pour the slurry into the mold, place it on a shaking table and vibrate for 3 minutes, then place it in a steam curing box for 24 hours of steam curing at 80°C and a relative humidity of 95%, and then spray water at room temperature for ...

Embodiment 2

[0057] This example prepares a graphene geopolymer material, and the difference from Example 1 is that calcined kaolin is replaced by fly ash.

Embodiment 3

[0059] The present embodiment carries out the recycling of graphene geopolymer material, comprises the following steps:

[0060] 1) Putting the graphene geopolymer material of Example 1 into a concrete pulverizer for pulverization, and calcining the graphene geopolymer particles with a particle size of 100 to 2500 meshes to obtain calcined graphene geopolymer materials;

[0061] 2) Return the calcined graphene geopolymer material to the pulverizer, pulverize and sieve, select the powder with a particle size of 1600 mesh, and then use it in combination with calcined kaolin, the mass ratio of calcined graphene geopolymer material to calcined kaolin 1:2, then mixed with sludge, then added graphene, tartaric acid, potassium phosphate and naphthalene-based water reducer, stirred evenly, and then added alkali activator to obtain regeneration slurry;

[0062] 3) Pour the regenerated slurry into the mold, then steam curing, and then spray water at room temperature for curing, use a no...

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Abstract

The invention belongs to the technical field of resource recycling, and particularly relates to a graphene geopolymer material as well as a preparation method, application and a regeneration method thereof. According to the invention, sludge, an active silicon-aluminum material and an alkali activator are adopted as raw materials, and graphene is added as a modifier to obtain graphene geopolymer,so that the resource utilization of the sludge can be realized, and the problems of difficulty in sludge treatment and high treatment cost are solved; moreover, through the synergistic effect of graphene, tartaric acid, phosphate and a naphthalene water reducer, the performance of the geopolymer can be remarkably improved, the compressive strength and breaking strength of the graphene geopolymer are high, the defect that an existing geopolymer is high in strength but high in brittleness is overcome, and the graphene geopolymer further has high temperature resistance, corrosion resistance and wear resistance; and besides, the graphene geopolymer contains a large amount of silicon-aluminum materials, recycling can be achieved, material waste is reduced, and resources are saved.

Description

technical field [0001] The invention belongs to the technical field of resource reuse, and in particular relates to a graphene geopolymer material and a preparation method, application and regeneration method thereof. Background technique [0002] With the rapid improvement of my country's economic development and people's living standards, the annual discharge of urban sewage in my country is huge, and the amount of sludge continues to increase at an average annual rate of 10%. Therefore, to achieve sludge reduction, resource utilization, and harmless And stabilization is the top priority of sludge treatment. Sludge is divided into industrial sludge, water treatment sludge, river and lake sludge, etc. Sludge is produced in a large amount and has serious hazards, so it needs to be paid attention to. The sludge itself contains a large amount of usable substances that can be used in resource utilization. . [0003] However, the current utilization of sludge resources is mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00C04B28/26
CPCC04B12/005C04B28/006C04B18/0418C04B18/08C04B14/106C04B14/14C04B14/047C04B12/04C04B22/062C04B14/024C04B24/06C04B22/16C04B2103/302Y02P40/10
Inventor 蒋树贤李宇峰林泽彬谢建和叶润鑫梁文添黎东宇徐源彬
Owner GUANGDONG UNIV OF TECH
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