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Protective agent for improving self-protection capability of cement concrete in active service and preparation method of protective agent

A technology of cement concrete and protective agent, applied in the direction of anti-corrosion paint, coating, etc., can solve the problems of falling off, weakened protective effect, loss, etc., and achieve the effect of improving waterproof, low application cost and simple construction method

Pending Publication Date: 2022-07-29
BEIJING HUAXIA PIONEERING NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method of spraying paint or coating on the surface of cement concrete still has many deficiencies, because the coating is attached to the surface of cement concrete, there is a risk of coming off unavoidably, and many coatings are also just two or three years old. There will be more or less peeling off, once the coating falls off, its protective effect will be weakened, or even completely lost, and the aesthetics will become worse; if you want to re-spray a layer of paint or coating to restore the protective effect, Then the aging coating needs to be completely removed before spraying, so as to ensure the adhesion and aesthetics of the new coating, which increases the difficulty, cost and construction period of maintenance again

Method used

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  • Protective agent for improving self-protection capability of cement concrete in active service and preparation method of protective agent
  • Protective agent for improving self-protection capability of cement concrete in active service and preparation method of protective agent
  • Protective agent for improving self-protection capability of cement concrete in active service and preparation method of protective agent

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preparation example Construction

[0039] The present invention also provides a method for preparing a protective agent for improving the self-protection ability of cement concrete in active service, which is used to prepare the above-mentioned protective agent for improving the self-protection ability of cement concrete in active service. Specifically, the method may include the following steps:

[0040] Step 1. According to the above formula of the protective agent for improving the self-protection ability of the active cement concrete, weigh the methyl silicone resin, orthosilicic acid and double alkali solution.

[0041] Step 2, firstly add the double alkali solution to the open reaction kettle, then slowly add the silicic acid and the orthosilicic acid to the reaction kettle while stirring in random order, and the stirring speed can be 60 ~120 rev / min, to avoid the one-time dosage is too large and the temperature rises too fast, the temperature in the reaction kettle is controlled between 70 ℃ ~ 90 ℃, and t...

Embodiment 1

[0059] A protective agent for improving the self-protection ability of active cement concrete, the preparation method of which comprises the following steps:

[0060] Step 1A, the preparation of silicone resin: add distilled water in the empty reactor, then add monomethyltrichlorosilane to the reactor while stirring, the weight ratio of the monomethyltrichlorosilane to the distilled water Be 1:8, regulate and control the temperature of described reaction kettle, make the liquid temperature in described reaction kettle controlled at 50 ℃, the stirring blade rotation speed that described reaction kettle stirs is 60 rev / min, the reaction time is 150 minutes, a methyl Trichlorosilane is distilled and hydrolyzed to obtain a mixture containing silicone resin; the mixture containing silicone resin is filtered with a 50-micron screen, the liquid part is removed, and the liquid part is stored in a storage tank for continued use in the next production, obtaining Solid phase substance; a...

Embodiment 2

[0072] A protective agent for improving the self-protection ability of active cement concrete, the preparation method of which comprises the following steps:

[0073] Step 1B, preparation of silicone: the same as step 1A in Example 1 of the present invention.

[0074] Step 2B, preparation of orthosilicic acid: the same as step 2A in Example 1 of the present invention.

[0075] Step 3B, preparation of double alkali solution: the same as step 3A in Example 1 of the present invention.

[0076] Step 4B, synthesis: it is basically the same as step 4A in Example 1 of the present invention, and the difference is only that: the weight ratio of the silicone resin to the orthosilicic acid and the double alkali solution is 2:3:5 , not 3:2:5.

[0077] Specifically, the protective agent that improves the self-protection ability of active cement concrete prepared by the embodiment of the present invention 2 is subjected to the detection of the following product properties and protective p...

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Abstract

The invention discloses a protective agent for improving the self-protection capability of cement concrete in active service and a preparation method. The protective agent is prepared from the following raw materials in parts by weight: 2-4 parts of methyl silicone resin, 2-4 parts of orthosilicic acid, 4-10 parts of a double-alkali solution and a non-ionic surface active agent with alkali resistance, the dual-alkali solution is an aqueous solution prepared from water and soluble alkali, and the soluble alkali adopts two of lithium hydroxide, potassium hydroxide and sodium hydroxide. According to the present invention, the self-protection ability of the active cement concrete can be improved, and after the coating material is sprayed on the active cement concrete surface, the coating material can permeate into the active cement concrete to react with the active cement concrete to form the permanent whole body; according to the present invention, the self-protection ability such as water resistance, stain resistance, corrosion resistance, freeze thawing resistance, carbonization resistance, chloride ion permeation resistance, wear resistance and the like of the cement concrete in service is improved, no additional coating is provided on the surface of the cement concrete, such that the falling risk does not exist, the construction method is simple, and the application cost is low.

Description

technical field [0001] The invention relates to the technical field of active cement concrete protection, in particular to a protective agent and a preparation method for improving the self-protection ability of active cement concrete. Background technique [0002] Due to the damage of external factors such as freezing and thawing, corrosion, weathering, and water seepage, the cement concrete structure in active service will suffer from diseases such as contamination, peeling, exposed tendons, and local breakage. It is necessary to provide necessary protection to control the occurrence and spread of diseases. , to ensure its beauty, safety and service life. [0003] At present, the most conventional protection method of cement concrete in active service is to spray various paints or coatings on the surface of cement concrete. These paints or coatings will form an additional coating of different thicknesses on the surface of cement concrete. The protective effect of cement co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/61C09D7/65C04B41/64
CPCC09D183/04C09D5/08C09D7/61C09D7/65C04B41/495C04B41/64C04B41/009C08K2003/2203C08L71/02C08K3/34C08K3/22C04B28/02C04B41/4543C04B41/50C04B41/4896
Inventor 李金辉冯丽萍李沛然
Owner BEIJING HUAXIA PIONEERING NEW MATERIAL
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