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Concrete anti-carbonization environment-friendly coating and construction method

A technology of environmentally friendly coatings and construction methods, applied in chemical instruments and methods, cement coatings, coatings, etc., can solve problems such as the negative effect of anti-carbonation of concrete, improve the brittleness of the coating film, reduce the cost of coatings, and protect the ecological environment. Effect

Inactive Publication Date: 2020-11-13
江西奇信集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional concrete interface agents and exterior wall coatings are mixed with polymer emulsions to ensure good adhesion to the base surface, but commonly used polymers, such as VAE emulsions, acrylic emulsions, styrene-acrylic emulsions, and polyurethane emulsions, although It has good adhesion, excellent waterproof performance, and can form a film at low temperature, but it is acidic, and concrete is an alkaline substance, and acid and alkali will undergo neutralization reactions, which have a certain impact on the film-forming properties of polymer emulsions. The anti-carbonization has a negative effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare the raw materials according to the predetermined formula ratio, first prepare component A: at room temperature, under the high-speed disperser of 1000r / min, uniformly disperse the silica sol in the water-based fluorine-containing acrylic polymer emulsion in proportion to obtain the silica sol / water-based fluorine-containing polymer emulsion The polyacrylate composite emulsion is the A component.

[0048] Preparation of component B: Mix cement, high-efficiency water reducer, and nano-silicon carbide whiskers in proportion, and fully mechanically stir them evenly, then add sepiolite powder, high-alkalinity steel slag powder, and heavy calcium carbonate powder and continue stirring until they are evenly stirred , to get the components.

[0049] Before construction, the concrete base surface should be polished and smoothed, and the floating dust, floating slurry, oil stains, etc. on the base surface should be removed with a wire brush. No water spots. Mix componen...

Embodiment 2

[0062] Prepare A component and B component according to the same method as in Example 1. After the concrete base surface is pretreated, mix A component, B component, and water in proportion and stir evenly. Use as you mix, and the paint is stirred It should be left to stand for 3 minutes before use.

[0063] The formula of present embodiment 2 is as follows:

[0064] Silica sol: 5 parts

[0065] High alkalinity steel slag powder: 80 parts

[0066] Water-based fluorine-containing acrylic polymer emulsion: 25 parts

[0067] Ground calcium carbonate powder: 20 parts

[0068] Meerschaum powder: 0.8 parts

[0069] Nano silicon carbide whiskers: 0.3 parts

[0070] Superplasticizer: 1.0 parts

[0071] Silica fume: 5 parts

[0072] Cement: 45 parts

[0073] Water: 15-25 parts

Embodiment 3

[0075] Prepare A component and B component according to the same method as in Example 1. After the concrete base surface is pretreated, mix A component, B component, and water in proportion and stir evenly. It should be left to stand for 3 minutes before use.

[0076] The formula of present embodiment 3 is as follows:

[0077] Silica sol: 9 parts

[0078] High alkalinity steel slag powder: 72 parts

[0079] Water-based fluorine-containing acrylic polymer emulsion: 30 parts

[0080] Ground calcium carbonate powder: 20 parts

[0081] Meerschaum powder: 1.5 parts

[0082] Nano silicon carbide whiskers: 0.5 parts

[0083] Superplasticizer: 2.0 parts

[0084] Silica fume: 3 parts

[0085] Cement: 35 parts

[0086] Water: 12-20 parts

[0087] The coatings formed in the above three embodiments were subjected to standard curing, and then carbonization experiments were performed according to different curing days to test the carbonization resistance of the coatings in each emb...

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Abstract

The invention relates to a concrete anti-carbonization environment-friendly coating and a construction method thereof. The coating comprises the following components in parts by weight: 2-10 parts ofsilica sol; 20-80 parts of steel slag powder; 15-40 parts of a water-based fluorine-containing acrylic polymer emulsion; 15 to 30 parts of heavy calcium carbonate powder; 0.5 to 3 parts of meerschaumpowder; 0.1 to 0.5 part of nano silicon carbide whisker; 0.1 to 2.5 parts of a water reducing agent; 2-8 parts of silica fume; 20 to 60 parts of cement; and 25-80 parts of water. Through the characteristic effects and the mutual synergistic effect of the components in the formula, the concrete anti-carbonization environment-friendly coating is good in anti-carbonization effect and good in performance of multiple properties, and can be widely applied to construction of various concrete base surfaces to form an anti-carbonization environment-friendly coating.

Description

technical field [0001] The invention relates to the technical field of building coating materials and construction, in particular to a concrete anti-carbonation environmental protection coating and a construction method. Background technique [0002] Concrete carbonation is a kind of chemical corrosion suffered by concrete, which refers to the CO in the air 2 In the presence of water, it reacts with cement hydration products (alkaline substances) to generate calcium carbonate and water, reducing the alkalinity of concrete. The cement in the concrete generates a large amount of calcium hydroxide during the hydration process, so that the concrete voids are filled with saturated calcium hydroxide solution, and its alkaline medium has a good protective effect on the steel bar, making the surface of the steel bar generate insoluble Fe 2 o 3 and Fe 3 o 4 , called the passivation film. Carbonation of concrete consumes Ca(OH) in concrete 2 , to reduce the alkalinity of concret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/08C09D7/61C09D7/65B28C5/00E04F13/02
CPCC09D1/08C09D7/61C09D7/65C09D7/70B28C5/003E04F13/02
Inventor 余少雄吴宙李菁许红
Owner 江西奇信集团股份有限公司
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