Concrete material with phase change heat storage function and preparation method

A phase change heat storage and concrete technology, applied in the field of concrete, can solve problems such as the decrease of concrete compressive strength, and achieve the effects of improving impermeability, increasing compressive strength and flexural strength, reducing thermal conductivity and adiabatic temperature rise

Active Publication Date: 2021-02-26
上海群宝建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventor found in the practical application of adding paraffin to concrete that the compressive strength of concrete

Method used

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  • Concrete material with phase change heat storage function and preparation method

Examples

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preparation example 1

[0048] A modified silicon dioxide grafted graphene oxide, prepared by the following method:

[0049] Under the protection of nitrogen, add graphene oxide into N,N-dimethylformamide, and ultrasonically disperse for 40 minutes under an ultrasonic wave with a power of 1000W to obtain a mixed solution for later use.

[0050] Under the protection of nitrogen, raise the temperature of the mixed solution to 50°C, add 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, heat and stir for 3 hours, then add modified silica, and continue to heat Stir for 10 hours, then cool down to room temperature, then filter, then wash with 10% ethanol solution, repeat the washing three times, and then vacuum freeze-dry for 28 hours to obtain modified silicon dioxide grafted graphene oxide.

[0051] Among them, the weight ratio of N,N-dimethylformamide, graphene oxide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and modified silica is 5:0.05 :0.1:1.

[0052] Graphene oxide is graphene oxide GO1211, and...

preparation example 2

[0061] A modified silicon dioxide grafted graphene oxide, prepared by the following method:

[0062] Under the protection of nitrogen, add graphene oxide into N,N-dimethylformamide, and ultrasonically disperse for 35 minutes under an ultrasonic wave with a power of 1500W to obtain a mixed solution for later use.

[0063] Under the protection of nitrogen, the temperature of the mixed solution was raised to 55°C, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide was added, and the heat preservation and stirring treatment was carried out for 2.5h, then the modified silica was added, and continued Insulated and stirred for 9 hours, then cooled to room temperature, filtered, and then washed with a 15% ethanol solution, repeated washing three times, and then vacuum freeze-dried for 26 hours to obtain modified silica-grafted graphene oxide.

[0064] Among them, the weight ratio of N,N-dimethylformamide, graphene oxide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and modified silica is...

preparation example 3

[0074] A modified silicon dioxide grafted graphene oxide, prepared by the following method:

[0075] Under the protection of nitrogen, add graphene oxide into N,N-dimethylformamide, and ultrasonically disperse for 30 minutes under an ultrasonic wave with a power of 2000W to obtain a mixed solution for later use.

[0076] Under the protection of nitrogen, raise the temperature of the mixed solution to 60°C, add 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, heat and stir for 2 hours, then add modified silica, and continue to heat Stir for 8 hours, then cool down to room temperature, then filter, then wash with 15% ethanol solution, repeat the washing three times, and then vacuum freeze-dry for 24 hours to obtain modified silica-grafted graphene oxide.

[0077] Among them, the weight ratio of N,N-dimethylformamide, graphene oxide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and modified silica is 10:0.1 :0.2:1.

[0078] Graphene oxide is graphene oxide GO1211, and is select...

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Abstract

The invention relates to the technical field of concrete, and particularly discloses a concrete material with a phase change heat storage function and a preparation method of the concrete material. The concrete material with a phase change heat storage function is prepared from the following raw materials: water, Portland cement, silica fume, fly ash, slag powder, quartz sand, stones, a water reducing agent, polyvinyl alcohol fibers, graphene oxide and solid-phase phase change powder, wherein the solid phase change powder is obtained by wrapping modified silicon dioxide grafted graphene oxidewith n-alkane paraffin, and modified silicon dioxide is obtained by modifying silicon dioxide with ferric nitrate and 3-aminopropyltriethoxysilane. According to the concrete material with the phase change heat storage function, the heat conductivity coefficient and the adiabatic temperature rise of the concrete material are reduced, so that the concrete material has a good heat storage effect, andthe compressive strength and the breaking strength of the concrete material are also improved.

Description

technical field [0001] The application relates to the technical field of concrete, more specifically, it relates to a concrete material with a phase change heat storage function and a preparation method thereof. Background technique [0002] With the continuous development of my country's construction industry, concrete, as an important material in the construction industry, has also made rapid progress, and put forward higher requirements for concrete. Among them, adding phase-change heat storage materials to concrete, phase-change heat storage materials generally use paraffin, and using paraffin wax can effectively reduce the occurrence of temperature cracks in concrete. However, the inventors found in the practical application of adding paraffin to concrete that the compressive strength of concrete decreased significantly, and the more the amount of paraffin added, the more obvious the decrease in compressive strength of concrete. Contents of the invention [0003] In ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/10C04B18/02C04B20/02C04B24/36
CPCC04B28/04C04B20/1044C04B18/02C04B20/023C04B2103/0071C04B2201/32C04B2201/50C04B18/146C04B18/141C04B18/08C04B14/06C04B14/02C04B16/0641C04B14/024C04B2103/302
Inventor 周宗群
Owner 上海群宝建材有限公司
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