CN211172795U

CN211172795U - Concrete infiltration protective coating structure

Info

Publication number: CN211172795U
Application number: CN201921213446.7U
Authority: CN
Inventors: 王建莉; 徐荣归; 刘浩杰; 喻明洋; 朱永斌; 任银霞
Original assignee: Shanghai Gomidt New Material Technology Co ltd
Current assignee: Shanghai Gomidt New Material Technology Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-08-04
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a concrete infiltration protective coating structure relates to concrete protection technical field. Mainly by three layer construction complex, from inside to outside in proper order is: the concrete base surface (1), the cement base putty layer (2) and the two-component permeable fluorine-silicon protective coating layer (3). The main components of the two-component protective coating are water-based fluorocarbon coating and silane dipping emulsion. The protective coating structure has the advantages of good air permeability, capability of enabling water vapor in the concrete to escape, prevention of corrosion of external harmful media, water resistance, carbonization resistance, weather resistance, bacteria resistance, mildew resistance, attractiveness and the like.

Description

Concrete infiltration protective coating structure

Technical Field

The utility model relates to a protective coating, concretely relates to concrete infiltration protective coating structure belongs to concrete protection technical field.

Background

The application research of the waterproof, impervious, chlorine ion permeation resistant, carbonization and mildew resistant, aging resistant, long-term durability and aesthetic degree of modern buildings adopting reinforced concrete structures, whether from building materials or from the outer wall surfaces of the buildings, is increasingly concerned by scientific research and constructors. Due to Ca in the concrete²⁺、Mg²⁺、Al³⁺Soluble salts are easy to generate water-soluble migration, so that the surface of a building is carbonized, weathered and salt frost is formed, the visual attractiveness of the building is influenced, and meanwhile, wall surface cracks are caused, so that the texture and durability of the building are damaged.

The existing concrete protection materials mainly comprise two types: one is a silicone waterproof material represented by a silane impregnant, which can permeate into concrete and be chemically combined to play a certain protection role, but the silane impregnant is colorless and transparent and does not form a film, so that the surface protection performance is poor and the durability is poor. And the other is a sealing coating which has shielding and isolating functions, but needs to be matched with epoxy primer and surface coatings such as polyurethane, fluorocarbon and the like for use, the coating is a hard and brittle system, has weak adhesive force, is easy to fall off and crack, can not allow internal water vapor to escape, is easy to generate a bubbling phenomenon, and has poor long-term durability, inconvenient construction, high maintenance cost, and poor economy and safety.

At present, a large number of buildings need to be maintained, repaired and recoated, and therefore, both newly-built buildings and well-built buildings need a concrete permeation protection coating structure urgently, and the coating has the performances of air permeability, high adhesion, chloride ion permeation resistance, medium resistance, water and carbonization resistance, aging resistance, attractive appearance and the like.

Disclosure of Invention

To above-mentioned existing technical problem, in order to improve concrete structure's durability, the utility model provides a high adhesive force, resistant medium, waterproof carbonization, ageing-resistant, pleasing to the eye concrete infiltration protective coating structure with ventilation effect.

In order to realize the above purpose, concrete infiltration protective coating structure mainly forms by three layer construction is compound, is concrete base face, cement base putty layer and two ingredient infiltration type fluorine silicon protective coating layer from inside to outside in proper order.

Further, the cement-based putty layer is formed by coating cement-based putty, and the cement-based putty is prepared by adding water into cement-based putty powder according to the weight ratio of 1: 0.15-0.5 of the above-mentioned components. The cement-based putty layer has good compatibility with a concrete base material, has the main functions of repairing concrete surface defects such as honeycombs, pitted surfaces, cracks and the like, has no thickness requirement, has the self strength of more than C30, and can ensure that the penetration depth and the air permeability of the two-component permeable fluorine-silicon protective coating are not influenced.

Further, the two-component permeable fluorine-silicon protective coating layer is formed by coating a two-component permeable fluorine-silicon coating II, the thickness of the coating is 0.03-0.1 mm, the color of the coating is adjustable, the adhesion to a base surface is high, and the coating has the performances of permeability, air permeability, chlorine ion permeation resistance, water resistance, carbonization resistance, medium resistance, aging resistance, attractiveness and the like. The coating is a water-based system and mainly formed by mixing two components of a water-based fluorocarbon coating (component A) and a silane impregnated emulsion (component B), wherein the water-based fluorocarbon coating contains functional additives such as a penetration enhancer, a thickening agent and the like, the silane impregnated emulsion contains functional additives such as an adhesion promoter and the like, and the A, B components have a weight ratio of 1: 0.2 to 0.5.

Compared with the prior art, the utility model, not only pleasing to the eye, used coating infiltration effect is good moreover, can permeate to the inside 1~3mm of concrete, and the adhesive force is excellent, and adhesive force reaches 0 level, and equivalent air layer thickness reaches 0.3S_dLess than m, the penetration depth of chloride ions is less than 2mm, and the ultraviolet light aging resistance performance is achieved. The treated concrete permeation protection coating has the advantages of high structure air permeability, good durability and high strength. Good air permeability can enable water vapor in the concrete to escape, and the concrete hasHas the advantages of preventing the erosion of external harmful media, resisting water, carbonization, weather, bacteria and mildew, and the like. The service life of the building is prolonged, and the maintenance cost is reduced. Convenient use, wide application range and good application prospect.

Drawings

Fig. 1 is a schematic structural view of the present invention; in the figure, 1-concrete substrate, 2-cement-based putty layer and 3-two-component permeable fluorine-silicon protective coating layer.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example 1

Concrete infiltration protective coating structure is formed by three layer construction is compound, and three layer construction is concrete base face, cement base putty layer and two ingredient infiltration type fluorine silicon protective coating layer from inside to outside in proper order.

Wherein, the cement-based putty layer is formed by adding water into cement-based putty powder and stirring; the two-component permeable fluorine-silicon protective coating layer is prepared from a water-based fluorocarbon coating and a silane dipping emulsion according to the weight ratio of 1: 0.2-0.5, and the coating is adjustable in color and 0.03-0.1 mm in thickness.

The preparation process of the coating comprises the following specific steps:

1. polishing and finishing floating ash, oil stains and insecure attachments on the surface of the concrete;

2. adding water into the cement-based putty powder according to the weight ratio of 1: 0.25, uniformly stirring for later use;

3. coating a cement-based putty layer on the surface of clean concrete in a scraping way, covering and repairing the surface defect of the concrete, wherein the thickness is 2.5mm, and forming the cement-based putty layer;

4. according to the weight ratio of 1: 0.3, weighing a proper amount of water-based fluorocarbon coating and silane dipping emulsion to prepare light gray double-component permeable fluorine-silicon protective coating, and mixing and stirring uniformly for later use; wherein the aqueous fluorocarbon coating contains a penetration enhancer and a thickening agent component, and the silane dipping emulsion contains an adhesion promoter component.

4. And (3) rolling and coating the light gray two-component permeable fluorine-silicon protective coating in the step (4) after the cement-based putty layer in the step (3) is dried and cured, coating for the second time after molding and before surface drying, wherein the thickness is 0.05mm, and the optimal performance can be achieved after natural curing for 7 days, so that the two-component permeable fluorine-silicon protective coating layer is formed.

Through actual detection, the strength of the coating structure reaches C30, the adhesive force is 0 grade, the penetration depth is 2mm, and the thickness of the equivalent air layer reaches 0.3S_dAnd/m, the penetration depth of chloride ions is 1 mm. In addition, the water resistance, the acid and alkali salt resistance, the aging resistance and the appearance plumpness are all superior to the prior art.

Claims

1. A concrete permeation protective coating structure is characterized by being formed by compounding three layers of structures, namely a concrete base surface, a cement-based putty layer and a two-component permeation type fluorine-silicon protective coating layer from inside to outside in sequence;

the cement-based putty layer is formed by coating cement-based putty;

the two-component permeable fluorine-silicon protective coating layer is formed by coating two-component permeable fluorine-silicon coating II.