JP2002308680A - Surface treatment method for member using cement based finishing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface treatment method for a surface decorative member formed by using a cement based finishing material which has high decorativeness, durability, strength, or the like. SOLUTION: A vitrifying treatment solution is infiltrated into the surface of a member formed by using a cement based finishing material of concrete, mortar, or the like, so that the surface of the member is vitrified, and the vitrified surface is subjected to a grinding finish. The vitrifying treatment solution contains a sodium silicate solution, and pigments for coloring can be added thereto. Further, it is possible that a finished face with a joint obtained by pasting a joint sheet blanked into a joint shape on a substrate face for finishing operation in a peelable way, and coating the same with a cement based finishing material, is used as the surface of the member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a surface of a building or a structure using a cement-based finishing material such as a wall surface, a floor surface, a road surface or a precast member.

[0002]

2. Description of the Related Art
As described above, as a surface treatment method for a member whose surface is exposed to the surface of a cement-based material such as concrete or mortar, painting or sharpening such as a clear top coat for gloss (glazing) and surface protection is known. However, sharpening is not suitable for thin coating, it requires several steps of polishing itself, and requires special skills and a special grindstone.

[0003] In addition, aging performed mainly for the purpose of decorativeness of a concrete surface is to apply an acrylic paint or the like to a single color finish to form an old finished surface, but this method also requires special skills. Therefore, a special contractor is required, and there are problems in terms of construction period and cost.

[0004] On the other hand, there is also known a technique of applying an aqueous solution containing an alkali silicate as a main component to a concrete surface and penetrating the same to vitrify the surface, thereby imparting the strength, hardness and waterproofness of the concrete. It is not decorative in itself, has poor gloss and unnatural appearance.

The present invention has been made to solve these problems and to provide a surface treatment method for concrete and the like having high decorativeness and naturalness in terms of gloss and pattern, in addition to improvement in strength, durability and waterproofness. It is.

[0006]

SUMMARY OF THE INVENTION The method of the present invention for solving the above-mentioned problems firstly comprises concrete,
The surface of the member formed by using a cement-based finishing material such as mortar is permeated with a vitrification treatment liquid to convert the surface of the member to vitreous, and the vitreous surface is polished.

[0007] Second, the vitrification solution contains a sodium silicate solution.

Thirdly, a coloring pigment is added to the vitrification solution.

Fourthly, the surface of the member is a jointed finish surface obtained by applying a cement-based finishing material by releasably attaching a joint sheet punched in a joint shape to the ground under the finishing work. It is characterized by.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, first, a surface of a member which has been finished with a cement finishing material such as concrete or mortar and has been dried is cleaned, and then a solution containing uncolored sodium silicate as a vitrification treatment solution is applied. , Brush, roller, spray, dipping or the like.

The vitrification liquid permeates the surface of the cement-based finishing material, and sodium silicate and free calcium in the cement react in the permeated layer to form a siliceous water-insoluble vitrified layer having a predetermined thickness. Is done.

At this time, by-products composed of calcium silicate, sodium hydroxide, water and the like are precipitated on the surface of the member.
Wash or wipe off after or before drying. Since the by-product has a slimy feeling, it is desirable to remove the by-product from the viewpoint of danger prevention when the member surface is a floor surface or the like.

After washing and drying the surface of the member, the construction surface is polished using a rotary buff, sander or the like, so that the surface of the member is roughened or densified with cement, aggregate, etc. Patterns of convex portions polished due to differences in degree or fine irregularities on the surface and concave portions not polished appear with a texture and luster close to that of natural stone.

Conventionally, a vitrification solution used as a surface treatment agent for concrete or the like has been considered unsuitable for coloring because a uniform color is not obtained even when coloring by adding a pigment. In the surface treatment of the present invention, by adding a pigment to the vitrification liquid and coloring and polishing the surface,
It turned out that the above-mentioned drawbacks functioned as a unique decorative treatment.

That is, as described above, the natural texture of natural stones, bricks, fired materials such as bricks and tiles due to the unevenness of the cement and aggregates of the members and the variation in the degree of penetration of the vitrification treatment liquid due to these changes in the pigments due to the pigment addition. In addition to being emphasized by coloring, the coloring and non-uniformity cause a texture and luster closer to that of natural stone or the like.

In particular, by polishing the surface, the blur pattern and its shading become clearer, the texture of natural stone and ceramics is superior to that of the conventional aging of the concrete surface using a paint, and the strength is enhanced by vitreous properties and weather resistance. sex,
Improvements in water resistance, chemical resistance, hardness, etc. are seen.

Further, in the method of the present invention including the above-mentioned aging, the joint material (stencil) is adhered to the base surface, and concrete, mortar or the like is sprayed or painted. The method can be applied to any method such as a method of performing a natural stone-like surface finish, a finish in which a design including coloring is added in advance, a finish of a smooth surface, and a finish with a texture. If the above-mentioned colored or uncolored method of the present invention is applied to these finished surfaces, the decorative effect on the wall surface and the like is more effective.

Further, the surface treatment of the present invention is carried out on the surface of cast concrete or mortar as described above by cast-in-place, and can be applied to a thick concrete such as a thin-layer finish using an existing foundation or a newly formed embossed concrete. Besides, it can be applied to the surface of precast members such as concrete blocks and the surface of cement-based secondary products such as siding.

[0019]

Next, specific examples of actual construction using the method of the present invention will be described for each work content and the like.

(1) Formation of treated surface As a cement-based finishing material for forming a treated surface, 25 kg of mortar material containing cement and aggregate, 5 kg of acrylic resin emulsion (aqueous mortar reinforcing material), and 333 ml of pigment (pigment) were used. A color mortar is manufactured by addition and kneading, applied to the base surface at a rate of 5 kg / m ² , and finished with a gold trowel. The pigment gives the ground color of the whole mortar.

(2) Preparation of Surface Treatment Solution The surface treatment solution is mainly composed of an alkali silicate, and uses an aqueous solution of sodium silicate (Na ₂ SiO ₃ ).
This solution is a light milky white suspension solution if uncolored,
To 15 kg of the main agent, 0.5 kg of an effect promoting additive (catalyst) for accelerating the onset of vitrification is added, and the mixture is stirred and mixed. At this time, 333 ml of pigment (dye) is added.
The pigment in this case is mainly for emphasizing the appearance of the pattern on the surface.

As the above-mentioned main agent and additive, a permeation type concrete surface strengthening agent “Zero Guard” manufactured by Atmix Co., Ltd. (Tokyo) was used. When an effect promoter was added, application within 60 minutes after blending was carried out. is necessary.

(3) Application of treatment liquid After the mortar surface is dried, the treated surface is cleaned with a brush, high-pressure air, water washing or the like to remove dust, sand, oil, etc. which hinder the adhesion and penetration of the treatment liquid. , 0.2 k
g / m ² .

This coating may be carried out by using a brush, a roller, a spray or the like.
It is applied at a rate of kg / m ² . After application, it is desirable to keep the drying state for about 30 minutes in order to achieve sufficient penetration, and water is sprayed or leveled to assist the penetration of the thickened treatment solution as uniformly as possible.

After drying, by-products and pigments precipitate on the coated surface, and are removed by washing with water as described above. Even before drying, it is desirable to remove in advance the processing liquid that has excessively overflowed the surface of the processing surface.

(4) Surface Polishing After drying the treated surface (the day after coating), the surface was polished by attaching a No. 400 sandpaper to a rotary buff.
Depending on the degree of surface polishing, the greater the amount of polishing, the more the porcelain-like (glass surface) glossy surface polished on the treated surface becomes more uneven compared to the non-polished rough surface which is a concave portion that is not polished. It appears as a pattern, and if no non-polished surface is left, the whole becomes a glass surface.

Further, on the glass surface, a blurred pattern, a sedimentary rock-like pattern, and the like appear more clearly due to the difference in the density of the cement-based finishing material and the difference in the penetration of the treatment liquid or the coloring treatment liquid due to the density.

It is ideal that the polishing is performed two days after the application of the treatment liquid. However, if the polishing is dried and solidified early, it can be performed before that.

(5) Reaction between the treatment liquid and the cement-based finishing material When the above-mentioned treatment solution is applied to the surface of the cement-based finishing material, sodium silicate (Na ₂ SiO ₃ ), catalyst, water, cement mortar components react, and silica It changes to calcium, sodium hydroxide, and water, and the water-insoluble calcium silicate gradually solidifies and vitrifies, forming a vitreous layer on the surface and in the portion of the mortar pores where the treatment liquid permeates. Is done.

[0030]

According to the method of the present invention constituted as described above, the finishing surface of a cement-based cement-based finishing material such as concrete or mortar is strengthened by vitrification, thereby improving weather resistance and water resistance. In addition to being excellent in chemical resistance, etc., it is possible to give a smooth and glossy texture to glass-based members by simple surface polishing. It is possible to clearly show a material feeling including a pattern by a pattern or the like transferred from the surface.

Further, these patterns and textures can be made clearer by coloring the treatment liquid. In particular, the unevenness of the mixing of the pigment with the treatment liquid and the unevenness of the degree of penetration into the cement-based finishing surface can be enhanced. Since the original blur pattern appears, there is a surface decoration effect that cannot be seen by other methods.

Further, not only is there no need for repeated coating as in the case of aging with conventional paints, but also there is no need for special skills, and the durability is remarkably excellent. The time required for surface treatment is 1 /
It is reduced to 5/3 and the processing cost is 50
There is an advantage that it can be reduced by about 70%.

Claims (4)

[Claims] 1. The surface of a member formed using a cement-based finishing material such as concrete or mortar is converted into vitreous by infiltrating the surface of the member with vitrification treatment liquid, and the vitreous surface is polished. A surface treatment method for a member using a cement-based finishing material. 2. The surface treatment method for a member using a cement-based finishing material according to claim 1, wherein the vitrification treatment solution contains a sodium silicate solution. 3. The method for surface treatment of a member using a cement-based finishing material according to claim 1, wherein a pigment for coloring is added to the vitrification treatment liquid. 4. The joint member according to claim 1, wherein the surface of the member is a jointed surface obtained by applying a cement-based finishing material by releasably attaching a joint sheet punched in a joint shape on the ground under the finishing work. Alternatively, a surface treatment method of a member using the cement finishing material of 2 or 3.