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Graphene oxide-modified fly-ash cementing material, mortar and concrete for buildings and preparation method

A graphene modification, cementitious material technology, applied in cement production and other directions, can solve problems such as large energy consumption, and achieve the effects of solving pollution problems, good durability, and reducing costs

Inactive Publication Date: 2018-08-03
WUHAN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0002] At present, the main cementitious material used in engineering construction is cement. In the production process of cement, it will not only consume a lot of energy, but also emit a lot of carbon dioxide, which will have a great impact on the environment. Therefore, it is necessary to seek a A new type of cementitious material that can replace cement to prepare high-performance concrete is of great significance to environmental protection and sustainable development

Method used

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  • Graphene oxide-modified fly-ash cementing material, mortar and concrete for buildings and preparation method
  • Graphene oxide-modified fly-ash cementing material, mortar and concrete for buildings and preparation method
  • Graphene oxide-modified fly-ash cementing material, mortar and concrete for buildings and preparation method

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preparation example Construction

[0035] The present invention further proposes a kind of preparation method of graphene oxide modified fly ash construction cementitious material as above, comprising the following steps:

[0036] Step S10, dissolving graphene oxide in 1 / 3 mixing water to form a first solution;

[0037] Wherein, the dissolution of the graphene oxide in the mixing water can be carried out by means of ultrasonic dispersion, and the graphene oxide can be fully dissolved. Of course, in other embodiments, other conventional dispersion methods can also be used, such as rapid stirring and the like.

[0038] Step S20, dissolving sodium α-olefin sulfonate, triisopropanolamine and water reducer in the remaining 2 / 3 mixing water to form a second solution;

[0039] Step S30, waste incineration fly ash, 425 # Cement, silica fume, sodium hydroxide and sodium phosphate are mixed by dry mixing to form a powder, then the second solution is added to the powder, the first stirring is carried out, and the first ...

Embodiment 1

[0048] Embodiment 1 Preparation of graphene oxide modified fly ash cementitious material for construction

[0049] (1) Raw material preparation: correspondingly weigh 2000Kg of waste incineration fly ash, 425 # Cement 1500Kg, silica fume 60Kg, sodium hydroxide 40Kg, sodium α-olefin sulfonate 3Kg, sodium phosphate 0.6Kg, graphene oxide 0.7Kg, triisopropanolamine 40Kg, TJ-1 series polycarboxylate high-performance water reducer 40Kg and 1200Kg of mixing water, set aside.

[0050] (2) Preparation of gelling material:

[0051] Add graphene oxide into 400Kg mixing water, and ultrasonically disperse until graphene oxide is fully dissolved to form the first solution;

[0052] Add α-olefin sulfonate sodium, triisopropanolamine and water reducer to 800Kg of mixing water, stir until α-olefin sulfonate sodium, triisopropanolamine and water reducer are fully dissolved to form a second solution;

[0053] Waste incineration fly ash, 425 # Dry mix cement, silica fume, sodium hydroxide and...

Embodiment 2

[0054] Example 2 Preparation of Graphene Oxide Modified Fly Ash Construction Cementitious Material

[0055] (1) Raw material preparation: correspondingly weigh 2000Kg of waste incineration fly ash, 425 # Cement 1000Kg, silica fume 60Kg, sodium hydroxide 45Kg, α-olefin sulfonate sodium 2.5Kg, sodium phosphate 0.5Kg, graphene oxide 0.75Kg, triisopropanolamine 40Kg, TJ-1 series polycarboxylic acid high-performance water reducing 30Kg of agent and 1050Kg of mixing water are set aside.

[0056] (2) Preparation of gelling material:

[0057] Add graphene oxide into 350Kg mixing water, and ultrasonically disperse until graphene oxide is fully dissolved to form the first solution;

[0058] Add sodium α-olefin sulfonate, triisopropanolamine and water reducer to 700Kg of mixing water, stir until sodium α-olefin sulfonate, triisopropanolamine and water reducer are fully dissolved to form a second solution;

[0059] Waste incineration fly ash, 425 # Dry mix cement, silica fume, sodium ...

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Abstract

The invention discloses a graphene oxide-modified fly-ash cementing material, mortar and concrete for buildings and a preparation method. The graphene oxide-modified fly-ash cementing material is prepared from the following components in parts by mass: 1000 to 3000 parts of waste incineration fly ash, 1000 to 3000 parts of number-425 cement, 20 to 200 parts of silica fume, 10 to 100 parts of sodium hydroxide, 1 to 5 parts of alpha-sodium olefinsulfonate, 0.1 to 4 parts of sodium phosphate, 0.1 to 3 parts of graphene oxide, 10 to 120 parts of triisopropanolamine, 20 to 150 parts of water reduction agent and mixed water, wherein a water-to-solid ratio is 0.2 to 0.5. By adopting the technical scheme provided by the invention, the waste incineration fly ash can be effectively used, the obtained mortar and concrete are good in performance, and the pollution problem of the fly ash can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cementitious material, mortar, concrete and a preparation method for graphene oxide modified fly ash construction. Background technique [0002] At present, the main cementitious material used in engineering construction is cement. In the production process of cement, it will not only consume a lot of energy, but also emit a lot of carbon dioxide, which will have a great impact on the environment. Therefore, we are looking for a A new type of cementitious material that can replace cement to prepare high-performance concrete is of great significance to environmental protection and sustainable development. Contents of the invention [0003] The main purpose of the present invention is to propose a cementitious material, mortar, concrete and preparation method for a graphene oxide modified fly ash building, aiming to provide a new cementitious material that can replac...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B28/02
CPCC04B7/26C04B28/021C04B2201/50C04B14/06C04B14/02Y02P40/10
Inventor 龚静石鲜明张荣堂李建芬钟晶卢爽
Owner WUHAN POLYTECHNIC UNIVERSITY
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