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Preparation method of graphene oxide enhanced cement-based mortar material

A technology for mortar materials and reinforced cement, which is applied in the field of preparation of graphene oxide reinforced cement-based mortar materials, and can solve problems such as agglomeration and flocculation, limiting the function of graphene oxide, etc.

Active Publication Date: 2018-08-21
张翼航
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, due to differences in different experimental conditions (ultrasonic power and time, type and dosage of dispersant, etc.), graphene oxide will still complex calcium ions produced by cement hydration, resulting in agglomeration and flocculation. This limits the maximum function of graphene oxide to a certain extent

Method used

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  • Preparation method of graphene oxide enhanced cement-based mortar material
  • Preparation method of graphene oxide enhanced cement-based mortar material
  • Preparation method of graphene oxide enhanced cement-based mortar material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh each component by weight as shown in the table below:

[0021]

[0022] The cement used in Example 1 is 42.5 grade ordinary Portland cement, the standard sand is produced by Xiamen Aisou Standard Sand Co., Ltd., the particle size is 1-5 μm, and the water is deionized water. The selected graphene oxide sheet diameter is 2 μm, the oxygen content rate is 30%, and the number of layers is 2 layers; the graphene oxide is added to deionized water and ultrasonically dispersed, the ultrasonic condition is 200W, the frequency is 40KHz, and the ultrasonic dispersion time The time is 30min; soak the obtained dispersion in liquid nitrogen for 30s to obtain ice cubes of the graphene oxide dispersion; add the ice cubes to the stirring pot under the operating condition of 3°C and stir the ice cubes at a low speed first. Broken, then continue to stir at low speed and add the weighed standard sand within 8s. After stirring for 3 minutes, add the weighed cement, and the cement is...

Embodiment 2

[0029] Weigh each component by weight as shown in the table below:

[0030]

[0031] The cement used in Example 2 is 42.5 grade ordinary Portland cement, the standard sand is produced by Xiamen Aisou Standard Sand Co., Ltd., the particle size is 1-5 μm, and the water is deionized water. The selected graphene oxide sheet diameter is 5 μm, the oxygen content rate is 50%, and the number of layers is 5 layers; the graphene oxide is added to deionized water and ultrasonically dispersed, the ultrasonic condition is 280W, the frequency is 60KHz, and the ultrasonic dispersion time The time is 30min; soak the obtained dispersion in liquid nitrogen for 90s to obtain ice cubes of the graphene oxide dispersion; add the ice cubes to the stirring pot under the operating condition of 1°C and stir the ice cubes at a low speed first. Broken, then continue to stir at low speed and add the weighed standard sand within 10s. After stirring for 4min, add the weighed cement, and the cement is add...

Embodiment 3

[0038] Weigh each component by weight as shown in the table below:

[0039]

[0040] The cement used in Example 3 is 42.5 grade ordinary Portland cement, the standard sand is produced by Xiamen Aisou Standard Sand Co., Ltd., the particle size is 1-5 μm, and the water is deionized water. The selected graphene oxide sheet diameter is 10 μm, the oxygen content rate is 60%, and the number of layers is 10 layers; the graphene oxide is added to deionized water and ultrasonically dispersed, the ultrasonic condition is 280W, the frequency is 80KHz, and the ultrasonic dispersion time The time is 60min; soak the obtained dispersion in liquid nitrogen for 180s to obtain ice cubes of the graphene oxide dispersion; add the ice cubes to the stirring pot under the operating condition of 0°C and stir the ice cubes at a low speed first. Crushing, then continue to stir at low speed and add the weighed standard sand within 10s, after stirring for 5 minutes, then add the weighed cement, the ce...

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Abstract

The invention discloses a preparation method of a graphene oxide enhanced cement-based mortar material. According to the method, an addition manner of graphene oxide is changed. The method comprises the following steps: rapidly freezing aqueous dispersion of graphene oxide with liquid nitrogen; crushing graphene oxide dispersion ice blocks, and gradually adding standard sand and cement in the process; finally, uniformly stirring the mixture, thereby obtaining the graphene oxide enhanced cement-based mortar material. According to the method disclosed by the invention, the graphene oxide can beuniformly dispersed in a cement matrix, the complexing action between the graphene oxide and calcium ions is well solved, a flocculation phenomenon of the graphene oxide in cement paste is effectivelyavoided, and excellent performance of the graphene oxide is further fully achieved. Moreover, any other dispersing agent does not need to be added, and introduction of impurities is reduced. The method disclosed by the invention provides a novel research thought for preparation of the graphene oxide enhanced cement-based mortar material.

Description

technical field [0001] The invention belongs to the field of nanotechnology modified cement-based materials, and in particular relates to a preparation method of graphene oxide reinforced cement-based mortar materials. Background technique [0002] Cement concrete is one of the most commonly used construction engineering materials in the world, and is widely used in roads, bridges, buildings and other infrastructure. The disadvantage of cement concrete material is its natural brittleness. During the actual service process of concrete, due to the action of load and external harmful substances, the concrete material will produce cracks, which will lead to the decline of the overall performance of the concrete. With the use of cement concrete materials under different environmental conditions, higher requirements are put forward for their related performance. In recent years, with the development of nanotechnology, the introduction of nanomaterials into cement concrete to impr...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02C04B14/02
CPCC04B20/02C04B28/04C04B2201/50C04B2201/52C04B14/06C04B14/024C04B22/0053
Inventor 张翼航冯旋
Owner 张翼航
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