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A heat storage concrete and its preparation method

A technology of concrete and heat storage, applied in the field of building materials, can solve the problems of thermal cycle stability and durability to be improved, heat storage and release efficiency reduction, poor compatibility of concrete, etc., to increase thermal cycle stability and reduce volume Swelling and cracking, increasing compactness effect

Active Publication Date: 2022-06-07
北京民佳混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In this phase change energy storage concrete, graphite is added to paraffin as a thermal conductivity additive to improve the thermal conductivity, heat storage and release efficiency of energy storage concrete, but because paraffin is a mixture of organic matter, it has poor compatibility with concrete. It will slowly ooze out after a period of time, resulting in lower heat storage and release efficiency, thermal cycle stability and durability need to be improved

Method used

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  • A heat storage concrete and its preparation method
  • A heat storage concrete and its preparation method
  • A heat storage concrete and its preparation method

Examples

Experimental program
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Effect test

preparation example 1-3

[0039] In Preparation Example 1-3, the silane coupling agent was selected from Guangzhou Suixin Chemical Co., Ltd., and the model was KH550, and the graphite oxide was selected from Nanjing Xianfeng Nanomaterials Technology Co., Ltd., and the model was NF003.

preparation example 1

[0040] Preparation Example 1: Disperse 0.2kg of silane coupling agent, 2kg of graphite oxide and 5kg of water evenly with a power of 200W ultrasonically, adjust the pH to 4.5 with citric acid to obtain a graphite oxide dispersion, add 5kg of paraffin, and place in a water bath at 70°C. Melt in medium, then emulsify at 16000rpm for 30min to obtain paraffin.

preparation example 2

[0041] Preparation Example 2: Disperse 0.3kg of silane coupling agent, 4kg of graphite oxide and 8kg of water evenly with a power of 250W ultrasonically, adjust the pH to 4.8 with citric acid to obtain a graphite oxide dispersion, add 8kg of paraffin, and place in a water bath at 75°C. Melt in medium, then emulsify at 17000rpm for 25min to obtain paraffin.

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Abstract

The application relates to the field of building materials, and specifically discloses a heat storage concrete and a preparation method thereof. The heat storage concrete includes the following components by weight: 220-260 parts of cement, 900-1100 parts of coarse aggregate, 800-900 parts of fine aggregate, 140-180 parts of water, 4.8-8 parts of admixture, fly ash 80‑100 parts, 3‑8 parts of aramid fiber, 10‑15 parts of graphite, 5‑10 parts of microcapsules; the phase change core material of microcapsules includes paraffin, the wall material includes silica, phase change core material and wall material The mass ratio is 3-5:10; Paraffin is made of the components comprising the following parts by weight: 2-6 parts of graphite oxide, 5-10 parts of water, 0.2-0.4 parts by weight of silane coupling agent, 5-10 parts of paraffin . The heat storage concrete of the present application has the advantages of good heat storage performance, high heat storage and release efficiency after repeated cycles, good durability, long service life and high thermal cycle stability.

Description

technical field [0001] The present application relates to the technical field of building materials, and more particularly, to a heat storage concrete and a preparation method thereof. Background technique [0002] The heat storage system is an indispensable part of the solar thermal power generation system, because a big disadvantage of solar energy is its instability. Had to close. In order to improve the working efficiency of the power station, it is required to operate normally during these intermittent times. To meet this requirement, a solar thermal power generation heat storage system must be introduced. In the solar thermal power generation system, considering that the heat demand is relatively large, and the construction and maintenance costs of the power station are relatively high, the unique advantages of heat storage concrete technology appear. [0003] Heat storage concrete is a new type of cement-based composite material made by adding a certain content of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/32C04B14/06C04B14/02C04B18/08C04B24/36C04B16/0691C04B24/121C04B14/024C04B24/005C04B24/42C04B2103/302Y02W30/91
Inventor 谢玲丽
Owner 北京民佳混凝土有限公司
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