KR102016387B1 - Construction method of concrete floor - Google Patents

Abstract

The present invention relates to a method for preparing the surface of a concrete floor. The method for preparing the surface of a concrete floor includes: a first surface treating step of removing a mortar layer by grinding a concrete floor surface; a second surface treating step of grinding the floor surface firstly surface-treated and removing residues from the surface; a third surface treating step of grinding the surface floor secondly surface-treated and repairing pinholes and cracks; and a step of sealing the floor surface firstly surface-treated before the second surface treating step. The method for preparing the surface of a concrete floor has excellent rigidity, durability, and a condensed structure of the concrete floor surface which is the base floor surface of an industrial flooring material. The method for preparing the surface of a concrete floor can extend a period of finishing the flooring material and can fundamentally remove a cause of defect generation on the base floor surface. So, the method for preparing the surface of a concrete floor can remarkably save defect repair and maintenance costs for the industrial flooring material and also enables a user to freely select the finishing flooring material by considering the cost and purpose. The method for preparing the surface of a concrete floor can largely reduce the amount of dust generated during reconstruction and can contribute to environment protection.

Description

Construction method of concrete floor

The present invention relates to a method for preparing concrete surface treatment, and more particularly, by systematically and technically processing existing concrete, newly placed and machined concrete floor, thereby reinforcing the compactness, surface hardness, and durability of the concrete floor. The present invention relates to a concrete floor surface preparation method that can solve the fundamental problems of defects occurring after construction of epoxy, urethane, etc. used throughout the industry by improving.

The base floors of all buildings such as factories, warehouses, parking lots, distribution centers, rooftops, hotels, officetels, shops, and buildings are made of concrete and finished.

Conventionally, in order to protect the concrete floor surface, coating method of coating type floor finish such as epoxy, urethane, etc. on the concrete floor surface, a method of reinforcing the surface by using an inorganic compound permeable surface strengthening agent, polishing method, etc. Has been applied.

First, a method of applying and constructing a coating type floor finish is a method of protecting a floor surface by applying a finish after only a simple cleaning or simple surface treatment of a concrete surface. Most of these methods rely on the performance of floor finishes to protect concrete floors. After a certain period of time, problems occur due to concrete problems that require periodic reconstruction.

Due to these defects, the first step to rebuilding is to remove the existing floor finishes. However, these defects are not a floor finishing material that is to be demolished, but the mortar layer falling out of the concrete floor is a modern problem. In other words, in order to reconstruct the floor surface where the defective floor finishing material is constructed, the existing floor finishing material must be removed from the floor. In this process, the floor finishing material is also removed and decomposed or decayed up to the corroded and weak floor mortar layer. It is necessary to grind a concrete surface (weak surface) of a certain thickness, and the amount of dust generated in this process is more than twice the amount of material of the floor finishing material injected during construction, which also causes problems of dust treatment.

In addition, the existing floor finish construction method had to reapply a large amount of flooring to reinforce the weak concrete floor which was not processed, and also had to choose a method to endure longer periods with more expensive floor finishes. . In addition, rework requires the addition of a line of demolition, which adds much more time and money than the initial construction.

Therefore, the application and construction of the final finishing material is continuously causing not only cost problems but also environmental problems as the aforementioned vicious cycle is repeated repeatedly.

Another method, the method using the inorganic compound-based permeability enhancer and polishing method has the advantage that the surface strength of the concrete is improved, and the wear resistance and scratch resistance is improved, but has a disadvantage of weak pollution resistance, water resistance. In other words, this method is a method of penetrating the permeable surface strengthening agent in the polishing step (roughing) after several steps of surface treatment, which is a method of increasing the surface density and then spraying and applying the permeable surface strengthening agent, thus increasing only concrete surface strength. And only improve.

In other words, concrete surface reinforcement and concrete polishing are methods that increase the strength of the surface as a finishing material, and do not completely remove the mortar-free surface without keystone, and maintain the density of the floor surface to the highest level by grinding and repairing it properly. Since the reinforcing agent is added, the reinforcing agent does not penetrate deep into the concrete floor and only reinforces the mortar layer. Thus, after a certain time, the mortar layer and the concrete layer are separated and a defect occurs. That is, there is no significant difference from the cause of the defect that occurs in the method (epoxy, urethane, hybrid, etc.) using the previous coating type floor finish.

Therefore, there is a need for a method for solving the underlying underlying resources of the film-like floor finish or non-coated floor finish that is constructed to protect the conventional concrete floor.

KR 10-1155174 B1 KR 10-0623674 B1

Therefore, an object of the present invention is to systematically process the existing and new concrete floor surface initially to make the concrete floor surface dense like the stone, causing the problems of the existing floor surface lifting, dropping, corrosion, etc. Is essentially eliminated.

Another object of the present invention is to enable the use of a small amount of materials and easy and quick construction during construction of the final floor finishing materials such as epoxy, urethane, etc. due to the method of preparing the concrete floor surface. In addition, it significantly reduces the amount of dust to be removed during reconstruction to minimize environmental pollution.

Yet another object of the invention is to provide a free choice of floor finishes.

The first surface treatment step of removing the mortar layer by grinding the concrete floor surface, the second surface treatment step of removing the surface residue by grinding on the first face treatment floor surface, the pinhole by grinding the second surface treatment floor surface And a third surface treatment step of repairing the crack, and may include sealing the first surface treated bottom surface before the second surface treatment step. Sealing the primary faced bottom may include removing dust from the first faceted bottom and sealing the spraying sealant or reinforcement onto the concrete floor. Sealing the primary faceted bottom may include repairing a flaw or break site of the sealed bottom. And applying a grouting material after the third surface treatment step of repairing the pinhole or crack by grinding the second surface treated bottom surface. The grouting material is a water-soluble grouting material, and may be any one of an acrylic emulsion, a styrene-emulsion, a vinyl acetate emulsion, a vinyl acetate-acrylic emulsion, an EVA (VAE) emulsion, a water-dispersed urethane, and a water-dispersion epoxy.

According to the present invention, it is excellent in strength, durability, denseness of the concrete floor surface, which is the foundation floor of the industrial flooring material, there is an advantage that the durability of the finish floor material can be extended thereby. In addition, since the cause of the defect is fundamentally removed from the foundation floor, there is an advantage that the repair cost, maintenance and management costs of the industrial flooring material can be drastically reduced. In addition, the floor finishing material can be freely selected in consideration of cost and use from the user's point of view, and the amount of dust generated during reconstruction is greatly reduced, thereby contributing to environmental protection.

1 is a cross-sectional view of a conventional concrete floor surface construction.
Figure 2 is a flow chart according to an embodiment of the concrete floor surface preparation method according to the present invention.
3 is a cross-sectional view of the concrete floor surface according to the conventional construction method.
Figure 4 is a cross-sectional view of the concrete floor surface constructed by the present invention.
5 is a cross-sectional view showing a sealant penetration portion of the conventional concrete floor surface.
6 is a cross-sectional view showing a sealant penetration portion of the concrete floor surface by the sealing step of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. In addition, the terms used are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of the participant operator. Therefore, the definitions of these terms should be made based on the contents throughout the present specification.

In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In describing the present invention, when it is determined that the detailed description of the configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the term, order, order, etc. of the components are not limited by the terms. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to other components, but between each component may be a " It is to be understood that the connection may be "coupled" or "connected".

The concrete floor surface to which the conventional floor finish is applied, for example, is composed of a concrete layer, a mortar layer, a latency layer and a finish layer as shown in FIG. At this time, the defects of the floor finishing layer is caused by the pores of the mortar layer and the concrete layer.

Therefore, in order to solve the cause of the defect, the present invention removes the mortar layer, and then closes the pores of the open concrete surface and secures a dense density, thereby densifying the density of the tissue like stone. It is to propose a method of applying a floor finish with a thin coating concept in order to process into a strong foundation floor, thereby securing functionality or aesthetics.

In order to protect the floor with a conventional floor finishing material, a floor finishing material such as epoxy or urethane should be applied to a thickness of 3 mm or more, but the concrete floor surface processed according to the method for preparing the concrete floor surface of the present invention is sufficient functionality with only a coating thickness of about 0.2 mm. And aesthetics.

Therefore, according to the present invention, it is possible to finish the concrete floor surface by only about 10% of the floor finishing vessels conventionally used, excellent material saving effect, significantly reduce the dust generated during demolition, time and cost reduction when reconstruction The effect is excellent, and the environmental protection effect is also excellent. In addition, by improving the strength, denseness, and durability of the concrete floor surface through the surface processing of the concrete floor surface, the choice of the final finishing material is free, construction is easy, and the occurrence of defects is minimized, so that the defect repair cost, maintenance management cost, etc. This has the advantage of being saved.

The concrete floor surface preparation method of the present invention, as shown in Figure 2, the first surface treatment step to remove the mortar layer by grinding the concrete floor surface, 2 to remove the surface residue by grinding on the first surface treated floor surface A primary face treatment step, a third face treatment step of repairing pinholes and cracks by grinding a second faceted bottom surface, and sealing the first faceted bottom surface prior to the second face treatment step Characterized in that.

First surface treatment step to remove mortar layer by grinding concrete floor.

First, the concrete floor is ground to completely remove the mortar layer. The mortar layer contains no or small amount of stones, and the concrete floor surface includes all cement mortar floors cured by pouring cement mortar on the floor surface of concrete or the upper surface of the concrete structure.

This step completely removes the mortar layer on the concrete floor through grinding, so as not only to structural defects such as micro cracks, irregularities, overburden, surface corrosion, etc. generated during concrete pouring, but also various moisture, oils, and latencies. To remove the same foreign object. In this process, it is not limited to the type of equipment and methods, but it is effective to maintain and secure the flatness of the floor by cross-crossing and cross-grinding method, and to remove the mortar layer by repeated grinding of information about 2-3 times.

Sealing the first faceted bottom surface.

When the primary face treatment is complete, sealants or reinforcements are applied to seal or strengthen the bottom. This step improves the strength, density, and durability of the concrete floor itself, thereby preventing the intrusion and absorption of water, chloride ions, and carbon dioxide from the outside. The step of spreading the sealant or reinforcing agent is not only for increasing the strength and durability of the surface of the primary faced floor, but also for increasing the strength and durability of the concrete layer by penetrating into the interior of the concrete floor. If the concrete layer is not strengthened by infiltrating the reinforcing agent or sealant, the concrete layer contracts and relaxes due to pressure when the heavy material moves in a building such as a factory, a parking lot, or a mall. Shrinkage and relaxation of the concrete layer cause defects such as pores, cracks, and cracks in the concrete. The use of steel reinforcing bars in buildings is due to the similar shrinkage and relaxation rates between concrete and reinforcing bars. If they do not, the shrinkage and relaxation are repeated, causing pores and cracks in the concrete, which in turn adversely affects the stability of the building. This shows that it is important to shrink and relax the concrete and to minimize the shrinkage and relaxation.Increasing the density or strength by infiltrating the sealant or reinforcement to the concrete layer increases the density of plants, parking lots, malls, apartments, etc. It can be seen that it is possible to prevent the occurrence of defects on the bottom surface.

In order to infiltrate the sealant or reinforcing agent into the interior of the concrete layer, the dust layer generated after the first surface treatment step must be removed in advance, and it is preferable to use a vacuum cleaner, a dust collector, a dust collector, and the like. The dust layer may contain not only concrete dust, but also other wastes that have adhered to the floor. If the dust is not treated, it will not be possible for the sealant or reinforcement to penetrate into the concrete layer, remaining on the surface and only sealing or strengthening the surface. However, grinding work, surface treatment work, etc. are impossible. How clean the dust treatment will affect the depth and effectiveness of the sealant or reinforcement in the concrete layer. Dust includes concrete dust from grinding the mortar layer, dust attached to the floor, and the like. In addition, since the pores and cracks in the bottom surface are gradually removed when the grinding is repeated, the sealant or reinforcement must be added after the first surface treatment step.

The sealant or reinforcement is fused with the concrete component through chemical reaction with calcium hydroxide in the concrete floor surface, and improves strength, durability, and the like by converting the concrete, which is neutralized by the strong alkalinity of the silicate itself, to alkalinity. Any of these silicate sealants may be used, but more preferably 100 parts by weight of the silicate resin, 1 to 5 parts by weight of fine silica powder, 0.1 to 5 parts by weight of polyacrylate, 0.1 to 5 parts by weight of quarterary ammonium solution, 0.1-5 weight part of polysiloxane emulsions, 0.1-3 weight part of polyether modified siloxane copolymers, and 5-50 weight part of water. The sealing operation is to fill the pores of the concrete layer with a sealing material such as silicate.

Specifically, a method of reinforcing the bottom surface by spraying a sealant or a reinforcing agent will be described. First, a silicate sealant and water are mixed in a 1: 0.5 to 1.5 weight ratio to prepare a diluent, and then the diluent is sprayed onto the bottom. Make sure to absorb enough. At this time, due to the difference in the density of the bottom surface may be a part that is absorbed a lot and a part that is absorbed, the part where there is a lot of absorption is sprayed with an additional diluent to keep the entire floor surface wet for at least 2 hours Ensure sealing or strengthening. The method and equipment of the spraying is not limited, but after spraying, curing is preferably performed at room temperature of 20 ° C. for 0 to 48 hours.

After spraying the sealant or reinforcing agent to cure, it may include the step of repairing the defect or damage. When the first surface treatment step is carried out, there are many defects and the like, so it is necessary to repair the defects or the damaged parts to flatten the floor. Mortar may be used to repair such defects or damaged parts, and a mortar dedicated to repair may be used for a faster process. Repair-only mortar can be used as a fast diameter repair mortar, fast curing mortar 100 parts by weight of cement, 1-10 parts by weight of calcium chloride, 5-10 parts by weight of phosphate, 2-5 parts by weight of calcium silicate, 5-10 weight by silica fume It is preferably composed of 15 to 25 parts by weight of an inorganic binder composed of parts, blast furnace slag or fly ash and 3 to 5 parts by weight of aluminum oxide. Also, in order to improve the adhesion between the repair mortar and the defect or damage site, water-soluble primer may be applied to the defect or site breakage, and then repaired with mortar. The water-soluble primer may contain about 6: 4 weight ratio of the water-soluble resin and the maintenance solvent. It is preferable that it consists of.

Second surface treatment step to remove surface residues.

After the sealant or reinforcing agent penetrates to the concrete layer and is sealed or reinforced, the bottom surface is ground and the second surface treatment is performed to clean up the surface of the sealing portion or the repair portion, and surface residues such as scratches generated during the first surface treatment. Remove it. There are no limitations on surface treatment methods and equipment, but it is desirable to grind through grinding.

Grinding in the first surface treatment step is to remove the mortar layer, but in the second surface treatment step to clean the surface of the sealing or repairing part, and to remove surface residues such as scratches generated during the first surface treatment. Grinding equipment and methods vary. The bottom contact of the grinding equipment used in the first surface treatment step is very rough to remove the mortar layer, while the grinding equipment used in the second surface treatment step is softer than the primary surface treatment step.

Removal of dust generated after the second surface treatment step can maximize efficiency in the next step.

Tertiary surface treatment step for repairing pinholes or cracks by grinding the secondary faced bottom surface.

This step is to grind the second faceted bottom once more to remove surface residues not removed in the second facet step, to repair pinholes or cracks and to remove scratches. If the pinholes or cracks remain or the scratches are not removed after the third surface treatment step, the fourth surface treatment and the fifth surface treatment may be performed.

It may include the step of applying a grouting material between each surface treatment step proceeded after the second surface treatment step. That is, the grouting material may be applied after the second surface treatment step and the grouting material may be applied even after the third surface treatment step. The location of the grouting material application step depends on the condition of the concrete floor. The grouting material is injected to fill the cracks, cavities, etc. in the concrete sea surface. The application of grouting material removes pinholes or cracks from the entire floor surface and fills the cavity of the surface to increase the density, and also prevents intrusion of water, chloride ion, carbon dioxide, etc. from the outside. As the grouting material, it is preferable to use a water-soluble grouting material, and specifically, an acrylic emulsion, a styrene-acrylic emulsion, a vinyl acetate emulsion, a vinyl acetate-acrylic emulsion, an EVA (VAE) emulsion, a water-dispersed urethane, a water-based epoxy, or the like can be used. Can be. The application method of the grouting material is to remove the dust on the faceted bottom surface, and then spray water to make it wet and apply a water-soluble grouting material. At this time, if the brush is sufficiently rubbed into the gaps such as pinholes and cracks, the efficiency is increased.

Applying a finish.

The step of applying the finish may proceed after the grouted floor or surface treatment step, but the surface treatment step is not limited. That is, the finishing material may be applied after the third surface treatment step or the finishing material may be applied after the fourth surface treatment step.

Hereinafter, the present invention will be described in more detail with reference to specific examples.

(Example 1)

The flooring finished with concrete was prepared, and the surface of the flooring was ground to completely remove the mortar layer.

The dust generated during grinding was removed using a vacuum cleaner and a dust collecting robot.

Next, the silicate sealant or reinforcing agent was sprayed on the flooring material, and the curing was carried out for 12 hours after the flooring material was kept wet.

And after applying the primer mixed with the water-soluble epoxy resin and ethyl ether to the flaw and the damaged part of the flooring material, and repaired with a repair mortar. At this time, the repair mortar used was composed of 100 parts by weight of cement, 5 parts by weight of calcium chloride, 7 parts by weight of phosphate, 3 parts by weight of calcium silicate, 7 parts by weight of silica fume, 20 parts by weight of blast furnace slag and 4 parts by weight of aluminum oxide.

And after removing the surface residues by grinding, the dust of the flooring material was removed.

And the grouting material was applied to the flooring material.

And after grinding to soften the bottom surface, the dust of the flooring material was removed.

(Test Example 1)

The durability of the flooring of Example 1 and Non-Example 1 was tested. In the durability test, the surface of the flooring material was ground with diamond according to the method of KS F 2813-01, and the total amount of dust generated during grinding was measured. And the results are shown in Table 1 below.

Test Example 1 Results Test Items Wear loss (mg) Wear loss
(H-22, 100g, 500times) Example 1 605 Comparative Example 1 5015

As can be seen in Table 1, the wear loss in Example 1 was significantly less than the wear loss in Comparative Example 1, it was determined that the surface strength was improved.

(Test Example 2)

The chlorine ion permeation resistance performance of the flooring materials of Example 1 and Comparative Example 1 was tested. The test was based on the method of ASTM C1202 Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration. Aqueous 3.0% NaCl solution was added to the anode (-) cell, 0.3M NaOH solution was added to the anode (+) cell, and chlorine ion was applied to the surface of the flooring material for 6 hours using a power supply capable of continuously applying a voltage of 60V. . After the test type, flooring was split and sprayed with 0.1N AgNO ₃ solution, and chlorine ion-nitric acid was measured by dividing the discolored area according to the titration method into 5 equal parts. Was evaluated. The results are shown in Table 2 below.

Test Example 2 Results Test Items Average penetration depth (mm) Chlorine Ion Penetration
Resistance Example 1 0.28 Comparative Example 1 9.30

As can be seen in Table 2, the penetration depth of the chlorine ion of Example 1 was significantly reduced than the penetration depth of the chlorine ion of Comparative Example 1, it was determined that this is because the density of the flooring material improved.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: floor finish 5: surface layer
2: latency layer 6: pore or pinhole or scratch
3: mortar layer 7: sealant or reinforcing agent penetration
4: concrete layer 8: keystone

Claims (5)

A first surface treatment step of removing the mortar layer by grinding the concrete bottom surface;
A second surface treatment step of removing surface residues by grinding on the first surface treated bottom surface;
A third surface treatment step of repairing pinholes and cracks by grinding the second surface treated bottom surface; Including;
Sealing the first faceted bottom surface prior to the second face treatment step; Concrete floor surface preparation method comprising a. The method of claim 1,
Sealing the first faceted bottom surface,
Removing the dust layer on the bottom surface generated after the first surface treatment;
A sealing step of spraying a sealant or reinforcing agent onto the concrete floor; Concrete floor surface preparation method comprising a. The method of claim 1,
Sealing the first faceted bottom surface,
Repairing the defect or the damaged portion of the sealed bottom surface; Concrete floor surface preparation method comprising a. The method of claim 1,
After the third surface treatment step of repairing the pinhole or crack by grinding the second surface-treated bottom surface,
Applying a grouting material; Concrete floor surface preparation method comprising a. The method of claim 4, wherein
The grouting material is a water-soluble grouting material, which is any one of an acrylic emulsion, a styrene-emulsion, a vinyl acetate emulsion, a vinyl acetate-acrylic emulsion, an EVA (VAE) emulsion, a water-dispersed urethane, and a water-disperse epoxy. Surface preparation method.

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