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Concrete alkaline-adjustment microcapsule and preparation method thereof

A technology of concrete and microcapsules, which is applied in the field of concrete alkali-adjusting microcapsules and its preparation, which can solve the problems of corrosion inhibitor loss and other problems, and achieve the effects of green environmental protection, good slow-release effect and long effective period of slow-release effect

Active Publication Date: 2014-02-26
SHENZHEN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Some scholars proposed to add corrosion inhibitors during the preparation of reinforced concrete, among which nitrite is a typical representative, but using this method, the large loss of corrosion inhibitors in the early stage makes its effect on steel corrosion inhibition very small

Method used

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  • Concrete alkaline-adjustment microcapsule and preparation method thereof
  • Concrete alkaline-adjustment microcapsule and preparation method thereof
  • Concrete alkaline-adjustment microcapsule and preparation method thereof

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preparation example Construction

[0035] 1. An example of the preparation method of concrete alkali-adjusting microcapsules:

[0036] 1. Preparation of capsule core:

[0037] Table 1. The mass ratio of raw materials in each embodiment of the capsule core

[0038]

[0039]

[0040] among them:

[0041] Calcium oxide (Chengdu Kelon Chemical Reagent Factory, analytical pure);

[0042] Ethanol (Chengdu Kelon Chemical Reagent Factory, analytical grade), used as a solvent;

[0043] Microcrystalline cellulose (Anhui Shanhe Pharmaceutical Excipients Co., Ltd., Shanhe brand) is used as a thickening agent;

[0044] Tween 80 (Guangdong Yueqiao Reagent Plastic Co., Ltd., Yueqiao Brand) is used as a dispersant;

[0045] Hydroxypropyl methylcellulose (Shandong Ningjin Dexin Cellulose Co., Ltd.) is used as a binder.

[0046] The preparation method of the capsule core includes the following steps:

[0047] 1) Preparation of capsule core: According to the mixing ratio of capsule core in Table 1, first mix 50% ethanol with microcrystalline ce...

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Abstract

The invention discloses a concrete alkaline-adjustment microcapsule and a preparation method thereof. The concrete alkaline-adjustment microcapsule comprises a capsule core and a coating, the capsule core comprises a water soluble alkaline oxide and a forming agent, the coating comprises an organic material sensitive to low alkali environment, the water soluble alkaline oxide is one or a plurality of substances from calcium oxide, potassium oxide and sodium oxide. The concrete alkaline-adjustment microcapsule has good stability, by changing of the mass ratio of the capsule core material and the coating material, the release rate of the corrosion inhibitor can be controllably optimized, the water soluble alkaline oxide is used for enhancing PH to achieve the purposes of steel bar corrosion inhibition and delaying of the concrete carbonation, and the used materials are green and environmentally friendly, so that the concrete alkaline-adjustment microcapsule has the effects of controllable optimization, long effective period, good sustained-release effect and green and environmental protection effect.

Description

[Technical Field] [0001] The invention relates to a concrete corrosion inhibitor capsule, in particular to a concrete alkalinity regulating microcapsule and a preparation method thereof. [Background technique] [0002] As a representative of traditional building materials, reinforced concrete has the characteristics of high compressive strength, strong durability, and low cost. It is widely used in industrial and civil buildings, bridges, road engineering, underground engineering, water conservancy and hydropower engineering, port and ocean engineering, etc. Structures are now penetrating into large-span structures, towering structures, megastructures and special structures, and they are the most widely used building materials. In the active concrete structure, with the long-term use and the influence of the surrounding complex environment, especially in the coastal environment, the steel bars implanted in the concrete will inevitably corrode, resulting in a significant reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B22/06
Inventor 董必钦邢锋李淑婷丁蔚健吴永潮王琰帅房国豪林立简震昭
Owner SHENZHEN UNIV
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