KR102241950B1 - Water-proof and anti-corrosive composition and construction method by using the same - Google Patents

Abstract

The present invention relates to a water-proof and anti-corrosive composition and a water-proof and anti-corrosive construction method using the same. The water-proof and anti-corrosive composition comprises: 110-210 parts by weight of cement; 5-42 parts by weight of a cement modifier; 4-21 parts by weight of an adhesive improving agent; 0.5-28 parts by weight of an additive; and 0.1-5 parts by weight of clay minerals based on 100 parts by weight of a water-soluble acrylic composition. The water-proof and anti-corrosive composition according to the present invention shortens a construction time by omitting a separate drying step or a primer treating step with excellent bonding strength for a construction surface even in a wet state, facilitates easier construction, promotes safety of a worker because of not using an organic solvent, and forms a water-proof and anti-corrosive coating film having excellent weather resistance, chemical resistance, durability, and slip resistance.

Description

Water-proof and anti-corrosive composition and construction method by using the same}

The present invention relates to a waterproofing and anticorrosive composition and a waterproofing and anticorrosive construction method using the same, and more particularly, it has excellent bonding strength to the construction surface even in a wet state, and it is possible to promote the safety of workers by not using an organic solvent. And, it relates to a waterproof and anticorrosive composition excellent in weather resistance, chemical resistance, durability, and slip resistance, and a waterproof and anticorrosive construction method using the same.

In general, a waterproof layer is formed in commercial facilities such as apartment houses, public buildings, officetels or department stores, discount marts, underground parking lots of buildings, restaurants, kitchens, warehouses, large tanks and storage tanks of various factories and water treatment facilities, etc. It prevents damage to buildings or facilities and deterioration of durability due to moisture.

As such a waterproofing method, an asphalt waterproofing method, a sheet waterproofing method, and a coating film waterproofing method are widely used.

Asphalt waterproofing method has the longest history of use, has a lot of experience in use, and has a lot of experience in construction.However, since it must be used by heating and melting at the construction site, there is a problem that workers are exposed to danger during construction due to adverse odor and fire. In a climate where the four seasons are distinct like in Korea, there is a high possibility that the waterproofing performance is lost due to self-cracking of the waterproofing material coating film due to temperature difference.

The sheet waterproofing method is a method of forming a waterproof layer by making a sheet of synthetic rubber or thermoplastic synthetic resin having a predetermined thickness and width, and bonding the sheet to the waterproof surface at the construction site. It has high mechanical strength, can be installed at room temperature, and is weather resistant. , It has excellent chemical resistance, can secure a waterproof layer of a certain thickness, and has the advantage of easy construction, so it is a widely used construction method, but if the shape of the surface is complex, waterproof construction is difficult, and leakage from the joint between sheets may occur. In addition, partial repair is difficult, and there is a problem in that the waterproof layer swells due to the volatilization of the solvent contained in the adhesive used when attaching the sheet to the construction surface or the evaporation of moisture from the cement concrete, which is the construction surface.

The coating waterproofing method is a method of forming a waterproof coating layer by applying a liquid waterproof coating material to the construction surface at the construction site and curing and drying the waterproof coating material according to a chemical reaction or volatilization of a solvent. Because it is applied in a complex area, it is easy to construct, seamless construction is possible, and it has the advantages of good adhesion between layers of waterproofing material and the construction surface, high mechanical strength, and excellent durability, but it is applied in a liquid state at the construction site. Because of its good flowability, the thickness of the coating film becomes non-uniform due to the curvature of the construction surface, and it is difficult to fundamentally solve cracks in the base because it is a method that completely adheres to the floor surface, and swelling such as sheet waterproofing occurs due to moisture evaporation of concrete. There is a problem that the waterproof performance is lost. When such a swelling phenomenon occurs, contraction and expansion are repeated due to a difference in temperature and humidity, and the waterproof coating is damaged, and as a result, there is a problem in that the waterproof performance is lost.

In the case of the coating material composition or coating sheet used in the existing waterproofing method, when the construction surface is in a wet state, the adhesion to the construction surface decreases significantly, causing problems such as poor adhesion and peeling, resulting in loss of waterproof performance. , Since the construction is possible after completely drying the construction surface, it is greatly affected by the weather or season on the day of construction, so that construction is not possible or there is a problem that the waterproof performance reliability of the waterproof coating layer after construction is deteriorated.

In addition, in the case of water tanks installed in water purification ponds, drainage basins, apartment complexes and large buildings, the water tank's waterproof and anticorrosive performance is required. Problems such as organic waterproofing and anticorrosive coating material permeate into the water stored in the water tank, and the water stored in the water tank cannot be used, as well as waterproofing, anticorrosive construction or repair construction. In the step, since the work is carried out inside the water tank without ventilation, there is a problem such as a suffocation accident due to volatilization of the organic solvent.

Accordingly, there is a need for a new waterproof and anticorrosive composition that can be constructed in a wet state and prevent side effects due to volatilization of organic solvents, and a waterproof and anticorrosive construction method using the same.

Registered Patent No. 10-1925220 (registered on November 28, 2018)

In the present invention, the bonding strength to the construction surface is excellent even in a wet state, and the safety of the worker can be promoted by not using an organic solvent, and a waterproof and anticorrosive composition having excellent weather resistance, chemical resistance, durability, and slip resistance, etc. We intend to provide the waterproof and anticorrosive construction method used.

One embodiment of the present invention for achieving the above object is, based on 100 parts by weight of the water-soluble acrylic composition, cement 110 to 210 parts by weight, cement modifier 5 to 42 parts by weight, adhesion improver 4 to 21 parts by weight, additives It relates to a waterproof and anticorrosive composition comprising 0.5 to 28 parts by weight and 0.1 to 5 parts by weight of clay minerals.

The cement modifier may include at least one or more of gypsum and calcium aluminate.

The adhesion improving agent may include at least one or more of conchiolin and gum resin.

The additive may include at least one or more of a pigment, a dispersant, an antifoam, a stabilizer, and an antioxidant.

The clay mineral may include at least one or more of bentonite, hectorite, perlite, and attapulgite.

The water-soluble acrylic composition may include 31 to 56 parts by weight of a water-soluble acrylic resin having a solid content of 60 to 80% by weight and 2 to 6 parts by weight of a diblock copolymer of polyacrylic and polybutyl acrylate based on 100 parts by weight of water.

Another embodiment of the present invention relates to a waterproof method construction method using the waterproof anticorrosive composition, comprising: a pretreatment step of removing foreign substances from a surface to be constructed; A wetting step of making the surface to be constructed from which foreign matters have been removed into a wet state; A waterproofing and anticorrosive composition coating step of applying the waterproofing and anticorrosive composition of any one of claims 1 to 6 on a wet construction target surface; Inorganic powder spraying step of spraying the inorganic powder on the top of the waterproof and anticorrosive composition; And a finishing step of applying a coating agent to the construction target surface sprayed with the inorganic powder.

The waterproof and anticorrosive composition of the present invention has excellent bonding strength to the construction surface even in a wet state, and does not use organic solvents to promote worker safety, and has excellent weather resistance, chemical resistance, durability, and slip resistance. There is this.

In addition, according to the waterproofing and anticorrosive construction method of the present invention, the drying step of drying the construction surface and the primer application step are not required, so that the construction period is remarkably shortened, and the waterproof and anticorrosive construction is possible regardless of season or temperature. There is this.

Before describing in detail through preferred embodiments of the present invention, terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and meanings consistent with the technical idea of the present invention. And should be interpreted as a concept.

Throughout the present specification, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Throughout this specification, "%" used to indicate the concentration of a specific substance is (weight/weight)% for solid/solid, (weight/volume)% for solid/liquid, and liquid /Liquid means (volume/volume)%.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of each step, and each step may be implemented differently from the specified order unless a specific sequence is clearly stated in the context. have. That is, each of the steps may be performed in the same order as the specified order, may be performed substantially simultaneously, or may be performed in the reverse order.

Hereinafter, an embodiment of the present invention will be described. However, the scope of the present invention is not limited to the following preferred embodiments, and those skilled in the art can implement various modified forms of the contents described in the present specification within the scope of the present invention.

The present invention has excellent bonding strength to the construction surface even in a wet state, and it is possible to promote the safety of workers by not using an organic solvent, and a waterproof and anticorrosive composition having excellent weather resistance, chemical resistance, durability, and slip resistance, and the like. It relates to the waterproofing and anticorrosive construction method used.

First, the waterproof and anticorrosive composition according to an embodiment of the present invention is based on 100 parts by weight of a water-soluble acrylic composition, 110 to 210 parts by weight of cement, 5 to 42 parts by weight of a cement modifier, 4 to 21 parts by weight of an adhesion improver, and 0.5 parts by weight of an additive. It contains ~28 parts by weight and 0.1 to 5 parts by weight of clay minerals.

The water-soluble acrylic composition is an acrylic aqueous solution containing an acrylic resin having excellent adhesion and material mixing properties, and can be adhered to the construction floor by coating various particulate materials including cement. It can form a solid adhesive force.

Since these water-soluble acrylic compositions contain water as a solvent, they do not emit volatile organic compounds (VOCs) that are harmful to the environment and human body during manufacturing or construction, so there is no problem of causing air pollution or harming the health and hygiene of workers. In addition, since a separate surfactant or organic solvent is not required for improvement of physical properties, appearance, and workability, it is environmentally and human-friendly.

In addition, when moisture contained in the water-soluble acrylic composition is dried to form a coating film, a waterproof coating film with excellent elasticity, elongation, and tensile strength is formed because it exists in a similar crystal form, so it can flexibly respond to the behavior of the surface to be constructed. There is an advantage of excellent durability because no crack or damage to the coating film occurs due to the behavior of the surface.

The water-soluble acrylic composition may include 31 to 56 parts by weight of a water-soluble acrylic resin having a solid content of 60 to 80% by weight and 2 to 6 parts by weight of a diblock copolymer of polyacrylic and polybutyl acrylate based on 100 parts by weight of water.

The water-soluble acrylic resin is an acrylic aqueous solution having a solid content of 60 to 80% by weight obtained by reacting an acrylic monomer with an initiator in a solvent and then adding a stabilizer. Such water-soluble acrylic resin is soluble in water before drying, but a similar crystal form after drying. There is a characteristic of forming a coating film of.

At this time, the acrylic monomers include 45 to 74% by weight of 2-ethylhexyl acrylate, 15 to 38% by weight of 3-trimethoxy silylpropyl methacrylate, 3 to 15% by weight of methyl methacrylate, and 7 to 20% by weight of methacrylic acid. % Can be used.

2-ethylhexyl acrylate improves the adhesion of water-soluble acrylic resins, and 3-trimethoxy silylpropyl methacrylate improves adhesion by controlling the glass transition temperature, and improves elongation, elasticity and tensile strength, and methyl Methacrylate can improve impact resistance, transparency and chemical resistance, and methacrylic acid and acrylic acid can impart water-soluble properties to acrylic resins by including a carboxyl group in the chemical structure.

That is, when the content of 2-ethylhexyl acrylate, 3-trimethoxy silylpropyl methacrylate, or methyl methacrylate is insufficient, or when the content of methacrylic acid and acrylic acid is excessive, the adhesion, strength, durability, elasticity, and elongation of the coating film , Weather resistance, chemical resistance, and other characteristics are not sufficiently expressed. Conversely, the content of 2-ethylhexyl acrylate, 3-trimethoxy silylpropyl methacrylate, and methyl methacrylate is excessive, or the content of methacrylic acid and acrylic acid is excessive. If the content is insufficient, the solubility of the acrylic resin in water, which is a solvent, is lowered to form a non-uniform composition, making it difficult to express physical and chemical properties of the coating film, and deteriorating the reliability of the coating film because certain physical properties are not expressed in the entire area. There is.

The type of initiator used when manufacturing a water-soluble acrylic resin is not particularly limited, and the stabilizer exhibits a property of being dissolved in water before drying by hydrogen bonding with a carboxyl group, but forming a similar crystal-like state after drying. Will appear. Diethylenetriamine may be used as such a stabilizer.

The diblock copolymer of polyacrylic and polybutyl acrylate is a component added to improve the elasticity, elongation and tensile strength of a water-soluble acrylic resin, and when it is added in less than 2 parts by weight, it is difficult to obtain such an effect, and 6 parts by weight If it is added in excess, the stability of the water-soluble acrylic resin is lowered, resulting in agglomeration phenomenon, which may lower the physical properties of the coating film, and thus it is preferably contained within the above-described weight range.

Cement is a component that exhibits strength by reacting with water and curing, and can be cured by reacting with water present on the wet construction surface and water contained in the water-soluble acrylic composition. As such a cement, any one or more selected from ordinary Portland cement, coarse steel cement, ultra-coarse steel cement, super fast-diameter cement, and white cement can be used.

Cement can be used in the range of 110 to 210 parts by weight based on 100 parts by weight of the water-soluble acrylic composition.If the content of cement is less than 110 parts by weight, it is difficult to develop sufficient strength for the waterproof and anticorrosive coating, and if it exceeds 210 parts by weight Since the difference in curing speed between the surface and the interior becomes large, microcracks or cracks are generated, and the waterproofing and anticorrosive function is deteriorated, it is preferable to be included within the above-described weight range.

Cement modifier is a component added to enable rapid hardening by controlling the hydrocuring reaction of cement, to prevent cracking due to drying shrinkage of cement, improve durability, and to improve the tensile strength of waterproof and anticorrosive coatings. At least one or more of gypsum and calcium aluminate may be included.

Gypsum is added to reduce the initial heat of hydration of cement to prevent cracking due to initial rapid setting, and at least one of anhydrite, semihydrated gypsum, and dihydrate gypsum may be used as gypsum.

Calcium aluminate can impart expandability to prevent cracking due to drying shrinkage and improve tensile strength, improve chemical resistance and promote cement hardening, thereby imparting crude stiffness.

As the cement modifier, preferably both gypsum and calcium aluminate may be included, and in this case, gypsum and calcium aluminate are preferably included in a weight ratio of 1:0.8 to 4.3.

The cement modifier may be included in an amount of 5 to 42 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if it is contained in less than 5 parts by weight, it is difficult to obtain effects such as crack prevention, accelerating hardening, and increasing strength and chemical resistance, and 42 parts by weight. If it exceeds parts, the strength of the cement is not sufficient due to the content of the modifier, so that the strength is lowered, and the adhesiveness with the construction base surface is lowered.Therefore, it is included within the above-described weight range. desirable.

The adhesion improving agent improves the adhesion between the waterproof and anticorrosive composition to the surface to be applied and the adhesion between other components, including particulate components included in the waterproofing and anticorrosive composition. It is an ingredient that is added to prevent delamination and the like.

The adhesion improving agent may be included in an amount of 4 to 21 parts by weight based on 100 parts by weight of the water-soluble acrylic composition.If it is contained in less than 4 parts by weight, the effect of improving adhesion is insignificant, and if it is contained in more than 21 parts by weight, the physical properties of the coating film are lowered. And, since it is difficult to form a flat surface, it is preferably contained within the above-described weight range.

The adhesion improving agent may include at least one or more of conchiolin and gum resin.

Conchiolin is an adhesive protein contained in shellfish such as abalone, clams, oysters, clams, and mother-of-pearl. As it has excellent adhesion and forms strong adhesion even in the presence of water, it is excellent even in humid environments. Although it has the advantage of expressing adhesion, it is characterized by a slight decrease in adhesion in a dry environment.

Gum resin is a component added to improve the adhesion of the waterproof and anticorrosive composition, and functions to improve dispersion stability by uniformly dispersing the components included in the waterproof and anticorrosive composition as well as improving adhesion. As such gum resin, at least one or more selected from the group consisting of guar gum, xanthan gum, locust bean gum, gellan gum, gum arabic, pectin, and carrageenan may be used.

At this time, as an adhesion improving agent, preferably, conchiolin and gum resin may be used together. In this case, the initial adhesion is improved by conchiolin in the wet state at the beginning of construction, and high adhesion is expressed by the gum resin after drying. There is an advantage in that high adhesion is formed both in the early and late stages of construction.

In particular, it is preferable to use conchiolin and gum resin in a weight ratio of 1: 1.5 to 2.3, and in this case, the adhesive strength in the wet state and the dry state become similar, so that the physical properties of the finally dried coating film will be better formed. In addition, the defective rate may be significantly reduced, so that the reliability of the coating film may be improved.

When the content of gum resin is insufficient or the content of conchiolin is excessive, there is a problem that the adhesion of the dry coating film to the surface to be applied is deteriorated, and the physical properties of the coating film are deteriorated, and in the opposite case, the adhesion to the wet surface at the beginning of construction. Since this is not sufficiently expressed, there is a problem that the adhesion stability of the finally formed coating film is deteriorated, and therefore, it is preferably used together within the above-described weight range.

As described above, conchiolin may cause a decrease in adhesion after drying, and there is a problem that the strength of the coating film decreases due to the addition of conchiolin, and to prevent this, an adhesion aid, myricetin, may be additionally included. have. These adhesion aids interfere with the protein structure of conchiolin, maintain adhesion in the wet state, and improve adhesion and physical properties after drying, and at the same time, improve the durability of the coating film by compensating for the decrease in strength caused by conchiolin. Has.

The adhesion aid may be included in an amount of 10 to 22 parts by weight based on 100 parts by weight of conchiolin, and if it is contained in less than 10 parts by weight, the effect of improving adhesion and physical properties after drying is insignificant, and if it contains more than 22 parts by weight, conchiolin Since there is a problem that the adhesive force in the wet state is rather lowered due to excessive interference with the structure of, it is preferable to be included within the above-described weight range.

Additives impart additional functions to the waterproof and anticorrosive composition, thereby improving the performance of the waterproof and anticorrosive coating film and improving workability. As such an additive, at least one or more of a pigment, a dispersant, an antifoam, a stabilizer, and an antioxidant may be included.

The additive may be included in an amount of 0.5 to 28 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if the content of the additive is less than 0.5 parts by weight, it is difficult to obtain the effect of improving additional functionality by the additive, and if it exceeds 28 parts by weight, the content Due to this excessive, the adhesiveness with the construction surface may be lowered, the waterproofness, strength, and durability of the waterproof and anticorrosive coating may be deteriorated, or a problem of poor workability may occur, so it is included within the above-described weight range. It is desirable to be.

Pigments are added to give effects such as improved aesthetics and improved visibility by imparting color to the waterproof and anticorrosive coating, and are not particularly limited in their kind, for example, lead chromate salt, titanium dioxide, calcium carbonate, barium sulfate, Aluminum silicate, talc, graphite, carbon black, iron oxide green, iron oxide red and metal oxides or fillers coated therewith can be used as the pigments of the present invention.

The pigment may be included in an amount of 5.2 to 13.5 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if the amount used is small, the color development by the pigment is not sufficiently achieved, and if excessive, the durability and chemical resistance of the waterproof and anticorrosive coating may be deteriorated. have.

The dispersant functions to increase the dispersibility of the components included in the waterproof/anticorrosive composition so that uniform physical properties are formed in the entire area of the waterproof/anticorrosive coating film.

As such a dispersant, preferably an anionic dispersant may be used, and in this case, since the cement particle dispersant is adsorbed and consumed and is reduced to below the limit micelle concentration (CMC), it is possible to prevent the decrease in the reactivity of the cement due to the adsorption of the dispersant on the surface of the cement particles. I can. As such anionic dispersant, dimethyl propionic acid, dimethyl butanoic acid, or a mixture thereof may be used.

The dispersant may be included in an amount of 2.4 to 7.7 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if it is contained in less than 2.4 parts by weight, the effect of improving dispersibility is insignificant, and if excessive, the adhesiveness and strength of the waterproof and anticorrosive composition decrease. Problems may occur.

Antifoaming agent is a component added to prevent deterioration of physical properties due to air bubbles in the coating film by removing air bubbles generated when mixing each component when preparing a waterproof/anticorrosive composition. As the antifoaming agent, a silicone-based antifoaming agent may be used, but is not limited thereto, and various known materials known to have a defoaming function in the same technical field may be used.

The antifoaming agent may be included in an amount of 0.5 to 2.2 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if it is contained in less than 0.5 parts by weight, the antifoaming effect is insignificant during the mixing process, and if it exceeds 2.2 parts by weight, the properties of the waterproof/anticorrosive composition Since there is a risk of lowering, it is preferable to be included within the above-described weight range.

Stabilizer is a component added to improve the dispersion stability of each component contained in the waterproof and anticorrosive composition and to give uniform properties of the waterproof and anticorrosive coating film by maintaining the dispersed state. As a stabilizer, hexamethylenebis-hydroxy Stearamide may be used, but is not limited thereto.

The stabilizer may be included in an amount of 0.8 to 2.7 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if it is contained in less than 0.8 parts by weight, the dispersion stability effect by the stabilizer does not appear, and if it is contained in more than 2.7 parts by weight, the stabilizer is excessive. It is included to reduce workability in the waterproofing and anticorrosive construction process, and there may be a problem of lowering the physical properties of the waterproofing and anticorrosive coating.

Antioxidants are added to prevent oxidation of the waterproof/anticorrosive composition and the coating film containing the same, thereby expressing long-term stable performance, 2,2-thiobis(4-methyl-6-t-butylphenol) or 2, 6-di-t-butylphenol may be used, but is not limited thereto, and various known antioxidants may be used.

Antioxidants may be included in an amount of 0.5 to 1.9 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and if the content is insufficient, the antioxidant effect is insignificant and the effect of improving the storage performance cannot be obtained. Since it can reduce the weight, it is preferably included within the above-described weight range.

In particular, in order to improve the physical properties and workability of the waterproof and anticorrosive composition, it is more preferable that all of a pigment, a dispersant, an antifoaming agent, a stabilizer, and an antioxidant are included as additives.

Clay minerals play a role in controlling the viscosity of the waterproof and anticorrosive composition so that the components contained in it are well dispersed and present, while at the same time playing a role in controlling workability and thixotropy. In addition, since water is absorbed in the clay mineral due to its porosity, it is possible to secure sufficient working time by preventing the dryness of the coating film at the construction stage, and the drying speed of the upper and lower surfaces of the coating is similar. It functions to help form uniform physical properties in the direction of the depth of the coating film by adjusting it so that it is removed.

In addition, it exhibits alkalinity, improves resistance to external environments such as acid rain, and has a function of improving the adhesion of waterproof and anticorrosive compositions.

At least one of bentonite, hectorite, pearlite, and attapulgite may be used as the clay mineral, and preferably bentonite and attafulgite may be mixed in a weight ratio of 1:0.6 to 1.2.

Bentonite is a component that functions to control dispersibility, workability, and thixotropy by increasing the viscosity of a waterproof and anticorrosive composition. In particular, in the case of using bentonite having a plate-like structure with an average particle size of 300 to 800 mesh, different charges are arranged on the surface and edges of the bentonite, forming a unique gel structure due to the electrostatic attraction of positive and negative charges, and has a thickening effect. As a result, it exhibits a strong thixotropic stabilizing effect to improve the stability of the waterproof/anticorrosive composition.

However, since bentonite has high swelling properties, when used alone, there is a risk of cracking due to shrinkage after drying. Therefore, when attapulgite having a crystal structure of an open channel in the form of elongation is used together, attapulgite Due to the structural characteristics of the waterproof and anticorrosive coatings, the resilience of the coating is improved, thereby preventing side effects caused by drying shrinkage.

Therefore, it is preferable to use bentonite and attapulgite together as clay minerals.

In particular, when the average particle size of attapulgite is 1000 to 2500 mesh, attapulgite, which has a smaller particle size than bentonite, is distributed around bentonite to more stably compensate for the deformation of the coating film due to swelling and contraction of bentonite. As described above, it is preferable that the average particle size of attapulgite is formed smaller than the average particle size of bentonite.

These clay minerals may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the water-soluble acrylic composition, and when it is contained in less than 0.1 parts by weight, it is difficult to obtain the above-described effect, and when it exceeds 5 parts by weight, viscosity and thixotropic properties It is preferable to be included within the above-described weight range because it may be excessively increased to reduce workability and decrease the strength of the coating film.

On the other hand, another embodiment of the present invention relates to a method of performing waterproofing and anticorrosive construction on a construction target surface requiring waterproofing and anticorrosive performance by using the waterproofing and anticorrosive composition according to an embodiment of the present invention described above, in which case The target surface for construction includes not only the floor surface of the roof of the building, underground parking lot, restaurant, warehouse, etc., but also the water tank used for water treatment facilities or storage tanks, the floor of the swimming pool, and the wall surface, so that construction can be performed in a wet state. Since the step of drying the cotton is omitted, quick construction is possible, and it has the advantage of providing constant waterproofing and anticorrosive performance regardless of season, weather, and humidity.

Specifically, a waterproof/corrosive construction method according to another embodiment of the present invention includes a pretreatment step of removing foreign substances from a construction target surface; A wetting step of making the surface to be constructed from which foreign matters have been removed into a wet state; Applying a waterproofing and anticorrosive composition to a wet construction target surface according to an embodiment of the present invention; Inorganic powder spraying step of spraying the inorganic powder on the top of the waterproof and anticorrosive composition; And a finishing step of applying a coating agent to the construction target surface sprayed with the inorganic powder.

The pretreatment step is a step of removing foreign substances on the construction target surface, removing foreign substances such as dust or fallen leaves attached to the construction target surface, and flattening the construction target surface by removing irregularities.

If the construction target surface is a concrete floor surface where cracks have occurred, the work of flattening by cutting the crack area and repairing it with a mortar composition may be performed at this stage.

The wetting step is a step of making the construction target surface from which foreign matters have been removed into a wet state, and water can be sprayed on the construction target surface to make the construction target surface wet. In this step, water washing of the construction target surface is performed together. It can be done.

The step of applying the waterproofing and anticorrosive composition is a step of applying the waterproofing and anticorrosive composition according to an embodiment of the present invention to the wetted construction target surface to impart waterproofing performance to the construction target surface. · The anticorrosive composition can be applied to the surface to be applied to impart waterproof performance to the surface to be constructed.

At this time, since some of the components included in the waterproof/anticorrosive composition react with water, the water-soluble acrylic composition containing water is separately packaged from other components, and then the water-soluble acrylic composition has the weight ratio described above at this stage. It can be used in combination with other ingredients. Other ingredients such as cement, cement modifier, adhesion enhancer, additives and clay minerals can be mixed together and stored before use.

The inorganic powder spraying step is a step of imparting slip resistance by spraying the inorganic powder on the top of the waterproofing/corrosive composition previously applied to the construction target surface, and the inorganic powder used at this time is sand, silica sand, calcium carbonate, or other minerals. , Ceramics, inorganic powders, etc. are not particularly limited.

In this step, since the waterproofing and anticorrosive composition is sprayed in an uncured state, the inorganic powder can be firmly bonded to the waterproofing and anticorrosive composition without using a separate adhesive.

The finishing step is a step of applying a coating agent to the construction target surface that has been subjected to the inorganic powder spraying step to more firmly adhere the inorganic powder, and the coating agent used in this step is, for example, a ceramic coating agent, a polyurea coating agent, a urea fluorine agent. It may be a coating agent or a urethane coating agent, and any coating agent that can be used as a finishing material is not limited thereto and may be used.

Hereinafter, specific actions and effects of the present invention will be described through an embodiment of the present invention. However, this has been presented as a preferred example of the present invention, and the scope of the present invention is not limited according to the embodiment.

[ Manufacturing example ]

Preparation of water-soluble acrylic composition

First, 135 g of water as a solvent, 162 g of 2-ethylhexyl acrylate, 75 g of 3-trimethoxy silylpropyl methacrylate, 24 g of methyl methacrylate, 39 g of methacrylic acid, and 4.5 g of BPO as an initiator were reacted and then polymerized, A water-soluble acrylic composition was obtained by mixing 36 g of diethylenetriamine as a stabilizer.

Next, a water-soluble acrylic composition was prepared by mixing 45 parts by weight of the water-soluble acrylic composition and 3 parts by weight of a diblock copolymer of polyacrylic and polybutyl acrylate based on 100 parts by weight of water.

Preparation of waterproof anticorrosive composition

100 parts by weight of the water-soluble acrylic composition, 160 parts by weight of white cement, 28 parts by weight of a mixture in which anhydrous gypsum as a cement modifier and calcium aluminate are mixed in a weight ratio of 1: 2, conchiolin and gum resin as an adhesion improver are 1: 1.6 12 parts by weight of the mixture mixed in a weight ratio, 1.2 parts by weight of a mixture in which bentonite, a clay mineral and attapulgite were mixed in a weight ratio of 1:0.8, and an additive were mixed and stirred to prepare a waterproof anticorrosive composition of Example 1.

Additives include 8 parts by weight of iron oxide green as a pigment, 3.5 parts by weight of dimethyl propionic acid as a dispersant, 1.8 parts by weight of a silicone antifoam, 1.5 parts by weight of hexamethylenebis-hydroxystearamid as a stabilizer, and 2,6-di-t as an antioxidant. -1 part by weight of butylphenol was used.

[ Experimental example One]

A waterproof anticorrosive composition was prepared using the same method as in Preparation Example, but the contents of conchiolin and gum resin used as adhesion improving agents were changed as shown in Table 1 below to prepare the waterproof anticorrosive compositions of Examples and Comparative Examples. In this case, the content of conchiolin and gum resin in Table 1 refers to the content of 100 parts by weight of the water-soluble acrylic composition.

Adhesion improving agent (parts by weight) Conchiolin Sword resin Conchiolin: Sword Resin Comparative Example 1 - - - Example 1 4.6 7.4 1: 1.6 Example 2 - 10.4 - Example 3 13.5 - - Example 4 5.2 7.4 1: 1.4 Example 5 4.2 8.3 1: 2.0 Example 6 3.8 8.3 1: 2.2 Example 7 3.6 8.8 1: 2.4

Next, water resistance and physical properties were measured for each of the waterproof anticorrosive compositions, and the results are shown in Table 2.

Specifically, the water permeability was measured according to KS F 4919, the adhesion strength, compressive strength and fine crack resistance were measured according to KS F 4918, and the wet surface adhesion performance was measured according to KS F 4935.

Water permeability Adhesion strength
(kgf/cm ² ) Compressive strength
(kgf/cm ² ) Crack resistance Wet surface adhesion Comparative Example 1 clear 33.2 272.3 Good Not eliminated Example 1 clear 42.8 277.5 Good Not eliminated Example 2 clear 35.5 279.7 Good Not eliminated Example 3 clear 36.0 265.4 Good Not eliminated Example 4 clear 36.4 275.8 Good Not eliminated Example 5 clear 43.1 286.9 Good Not eliminated Example 6 clear 43.3 289.2 Good Not eliminated Example 7 clear 42.8 255.4 Good Not eliminated

Looking at the results in Table 2, it can be seen that in the case of Comparative Example 1 and Examples 1 to 7, the fine crack resistance and adhesion to the wet surface were excellent. However, in the case of Comparative Example 1, adhesion compared to the Examples. It can be seen that the strength is remarkably decreased, and when an adhesion improving agent is added, an effect of improving adhesion is exhibited.

In addition, it can be seen that in Examples 2 and 3 in which gum resin or conchiolin was used alone as an adhesion improving agent, the adhesion strength was significantly lower than in other examples in which gum resin and conchiolin were used together.

In the case of Examples 1, 5, and 6, conchiolin and gum resin were used together, resulting in significantly improved adhesion strength and compressive strength compared to other examples. Comparing with Example 7 showed this result according to the content ratio of conchiolin and gum resin, it can be seen that when conchiolin and gum resin are included in an appropriate content ratio, adhesion strength and compressive strength are remarkably improved.

Therefore, from the results of this experiment, an adhesion improving agent is added to improve the adhesion of the waterproof anticorrosive composition of the present invention, but it is preferable to use a mixture in which conchiolin and gum resin are mixed in a weight ratio of 1: 1.5 to 2.3 as adhesion improving Was able to confirm.

[ Experimental example 2]

A waterproof anticorrosive composition was prepared using the same method as in Example 1, but the waterproof anticorrosive compositions of Examples 8 to 12 were prepared by further including an adhesive adjuvant, paroxetine, in the amount of Table 3 below. In addition, a waterproof composition of Example 13 was prepared by using the same method as in Example 2, but further including paroxetine as an adhesion aid.

Next, after performing the same waterproofing and physical property evaluation as in Experimental Example 1 for each of the Examples, the results are also shown in Table 3. At this time, the content of paroxetine in Examples 1 to 12 described in Table 3 refers to the content of 100 parts by weight of conchiolin, and in the case of Example 13, it refers to the content of 100 parts by weight of gum resin.

Paroxetine
(Part by weight) Water permeability Adhesion strength
(kgf/cm ² ) Compressive strength
(kgf/cm ² ) Crack resistance Wet surface adhesion Example 1 0 clear 42.8 277.5 Good Not eliminated Example 8 8 clear 43.0 282.6 Good Not eliminated Example 9 12 clear 45.7 311.1 Good Not eliminated Example 10 16 clear 46.1 314.6 Good Not eliminated Example 11 20 clear 45.3 308.7 Good Not eliminated Example 12 24 clear 37.1 255.4 Good Eliminated Example 13 10 clear 34.8 275.4 Good Not eliminated

Looking at the experimental results in Table 3, it can be seen that when precetin is additionally included as an adhesion aid, the adhesion strength and the compressive strength are improved. This is judged as the result that appeared because the function of conchiolin was enhanced by paroxetine.

However, when the content of paroxetine is insufficient as in Example 8, the improvement is not large, and when the content of paroxetine is excessive as in Example 12, the adhesion performance to the wet surface by conchiolin is lowered, and the strength of the coating film is reduced. It can be seen that it is lowered.

On the other hand, looking at Example 13, it can be seen that when conchiolin is not included, even if precetin is added, the water resistance or physical properties are not significantly affected.

Therefore, from the results of this experiment, it can be seen that when the waterproofing composition of the present invention further contains paroxetine as an adhesion aid, the function of conchiolin, an adhesion improving agent, is enhanced, and in particular, 10 parts by weight of conchiolin, based on 100 parts by weight of conchiolin. When included in ~22 parts by weight, it was confirmed that such adhesion and strength were significantly improved.

The present invention is not limited to the specific embodiments and description described above, and any person with ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims can implement various modifications. And, such modifications are within the scope of protection of the present invention.

Claims (7)

Based on 100 parts by weight of the water-soluble acrylic composition,
Cement 110 to 210 parts by weight, cement modifier 5 to 42 parts by weight, adhesion improver 4 to 21 parts by weight, additives 0.5 to 28 parts by weight, and clay minerals 0.1 to 5 parts by weight,
The adhesion improving agent is a mixture of conchiolin and gum resin in a weight ratio of 1:1.5 to 2.3,
The water-soluble acrylic composition comprises 31 to 56 parts by weight of a water-soluble acrylic resin having a solid content of 60 to 80% by weight and 2 to 6 parts by weight of a diblock copolymer of polyacrylic and polybutyl acrylate, based on 100 parts by weight of water. A composition for waterproofing and anticorrosive to be made. The method of claim 1,
The cement modifier is a waterproofing/corrosive composition containing at least any one or more of gypsum and calcium aluminate. delete The method of claim 1,
The additive is a waterproof/anticorrosive composition containing at least one or more of a pigment, a dispersant, an antifoam, a stabilizer, and an antioxidant. The method of claim 1,
The said clay mineral contains at least any one or more of bentonite, hectorite, pearlite, and attapulgite, a waterproofing and anticorrosive composition. A pretreatment step of removing foreign substances on the surface to be constructed;
A wetting step of making the surface to be constructed from which foreign matters have been removed into a wet state;
A waterproofing and anticorrosive composition application step of applying the waterproofing and anticorrosive composition according to any one of claims 1, 2, 4, and 5 to a wet construction target surface;
Inorganic powder spraying step of spraying the inorganic powder on the top of the waterproof and anticorrosive composition; And
A finishing step of applying a coating agent to the construction target surface sprayed with the inorganic powder; including, waterproofing and anticorrosive construction method. The method of claim 6,
The construction target surface, the roof of the building; underground parking lot; The floor of a restaurant or warehouse; Water tanks used in water treatment facilities or storage tanks; Or the bottom or wall of the pool; and,
The coating agent is a ceramic coating agent, a polyurea coating agent, a urea fluorine coating agent, or a urethane coating agent.