High-strength and high-impermeability multilayer graphene oxide concrete and preparation method thereof

A graphene and concrete technology, applied in the field of concrete, can solve the problems of small thickness and high cost of cement materials, and achieve the effects of improving performance, improving impermeability, and improving economic practicability

Inactive Publication Date: 2020-12-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene oxide used in existing cement-based materials has a thinner thickness and a smaller sheet diameter, resulting in higher costs for cement materials

Method used

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  • High-strength and high-impermeability multilayer graphene oxide concrete and preparation method thereof
  • High-strength and high-impermeability multilayer graphene oxide concrete and preparation method thereof
  • High-strength and high-impermeability multilayer graphene oxide concrete and preparation method thereof

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preparation example Construction

[0036] The present invention provides the preparation method of high-strength and high-impermeability multilayer graphene oxide concrete described in the above scheme, comprising the following steps:

[0037] Dispersing the multilayer graphene oxide into the first part of water to obtain a multilayer graphene oxide dispersion;

[0038] Premix the reference cement, graded sand, gravel and the second part of water to obtain the ready-mixed mixture;

[0039] Adding the multilayer graphene oxide dispersion and the remaining water to the ready-mixed mixture for stirring to obtain a slurry;

[0040] Put the slurry into the test mold, and after vibration, wipe off the slurry on the upper surface of the test mold to make the upper surface of the test piece smooth, remove the mold after the test piece is formed, and perform standard maintenance to obtain high-strength, high-impermeability, and more layers of graphene oxide concrete.

[0041] The invention disperses the multilayer gra...

Embodiment 1

[0056] The purity of multi-layer graphene oxide is ≥95%, the sheet diameter is 10-50 μm, the thickness is 3.4-7.0 nm, and the number of layers is 5-10; figure 1 is the TEM image of multilayer graphene oxide, from figure 1 It can be seen from the figure that it is multi-layered and has a large diameter; the reference cement is the reference cement with a strength of 42.5, and the fineness modulus of the graded sand is 2.7; Stones account for 40% of the total volume of stones, and stones with a particle size of 10mm to 20mm account for 60% of the total volume of stones;

[0057] Take 0.038 parts of multilayer graphene oxide and slowly add it to 20.5 parts of water for mixing, and stir magnetically until there is no suspended multilayer graphene oxide on the water surface, then put the initially stirred dispersion solution in an ultrasonic instrument, and perform ultrasonic dispersion for 30 minutes. The multi-layer graphene oxide dispersion is prepared for use; then 387 parts o...

Embodiment 2

[0059] The purity of multilayer graphene oxide is ≥95%, the sheet diameter is 10-50μm, the thickness is 3.4-7.0nm, and the number of layers is 5-10 layers; the reference cement is the reference cement with a strength of 42.5, and the fineness modulus of the graded sand The number is 2.7; the stones are secondary graded stones, the stones with a particle size of 5mm to 10mm account for 40% of the total volume of the stones, and the stones with a particle size of 10mm to 20mm account for 60% of the total volume of the stones;

[0060] Take 0.193 parts of multi-layer graphene oxide and slowly add it to 20.5 parts of water for mixing, and magnetically stir until there is no suspended multi-layer graphene oxide on the water surface, then put the initially stirred dispersion solution in an ultrasonic instrument, and carry out ultrasonic dispersion for 30 minutes. The multi-layer graphene oxide dispersion is prepared for use; then 387 parts of benchmark cement, 685 parts of graded san...

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Abstract

The invention relates to the technical field of concrete, in particular to high-strength and high-impermeability multilayer graphene oxide concrete and a preparation method thereof. The large-sheet-diameter and multi-layer graphene oxide is adopted, so that the large-sheet-diameter and multi-layer graphene oxide plays a bridging role in the concrete, internal pores can be filled, microcracks can be connected, formation of cement hydration crystals is accelerated, and the microstructure in the concrete is improved. Tests prove that the mechanical property and the impermeability of the multilayer graphene oxide concrete are greatly improved, compared with common concrete, the compressive strength and the breaking strength of the multilayer graphene oxide concrete are improved by 17% and 32%respectively in 28 days, the impermeability is improved by 44.8%, the performance is remarkably improved, and the limitation of traditional concrete is improved. The multilayer graphene oxide used inthe invention is multilayer and large in sheet diameter, so that the preparation is simpler and more economical than other nano materials, the economic practicability is greatly improved, and the costis reduced.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a high-strength and high-impermeability multilayer graphene oxide concrete and a preparation method thereof. Background technique [0002] As one of the most widely used building materials today, cement is widely used in projects such as housing construction and bridges. However, the disadvantages of cement-based materials, such as low flexural strength and poor crack resistance, limit its development. In order to overcome its shortcomings, some scholars have mixed materials such as polypropylene fibers and steel fibers, but the incorporation of materials such as steel fibers has not improved the microstructure of cement-based materials, nor has it inhibited the development of microcracks in cement. In recent years, nanomaterials such as carbon nanotubes, carbon fibers, and graphene have attracted much attention due to their ultra-high strength and stretchability, and have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/02
CPCC04B28/04C04B14/026C04B2201/50C04B14/06C04B14/02
Inventor 何威许吉航焦志男王亚伟
Owner YANSHAN UNIV
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