KR100189324B1 - Construction method for preventing dew condensation of concrete structure - Google Patents

Abstract

The present invention relates to a method for preventing condensation of concrete buildings, the method comprising: applying a silicone emulsion on the surface of the concrete or mortar that is the waterproof layer to form a sealing layer (sealing layer) inside the surface of the waterproof layer; Forming a waterproof coating layer by applying a cement compound to the surface of the waterproof layer in which the waterproof sealing layer is formed; Plastering mortar formed by substituting a part of water with a silicone emulsion on the waterproof layer to form a mortar layer.

According to this method, condensation can be prevented only by waterproofing and finishing mortar plastering without laying a separate protective wall or insulating material, and it is simple to install, which has the effect of shortening the air, reducing cost, and preventing lifting of the plaster layer. have.

Description

Condensation prevention method of concrete building

The present invention relates to a method for preventing condensation of concrete buildings, and more particularly, in concrete buildings, the present invention can be applied to underground floors, verandas, baths, swimming pools, water tank reservoirs, and wastewater treatment plants. The present invention relates to a method for preventing condensation of concrete that can be applied to repairing cracks.

Conventionally, in the case of concrete buildings, in order to prevent condensation from occurring on the inner wall of the basement layer, after waterproofing the concrete walls, they are attached to the walls or spaced about 10 to 20 cm apart to build a protective wall and finish plastering, or concrete After waterproofing and plastering on the walls, a separate insulation was constructed on it.

However, the method of constructing the insulation has the disadvantage that the condensation occurs between the adjacent insulation, the method of building a separate protective wall has a problem that the interior area is reduced and the construction cost increases.

The present invention is to solve the above problems of the prior art, the purpose of which is to prevent condensation only by waterproofing and finishing mortar plastering without a separate protective wall or insulating material construction, and at the same time simple construction It is to provide a condensation prevention treatment method of concrete building having the effect of shortening the air, reducing the cost, and preventing the lifting of the plaster layer.

1 is a cross-sectional view after the condensation prevention treatment of a concrete building according to the present invention.

Explanation of symbols on the main parts of the drawings

10: concrete matrix 12: waterproof sealing layer

20: waterproofing layer 30: plaster mortar layer

Condensation prevention treatment method of a concrete building for achieving the object of the present invention,

Forming a waterproof sealing layer inside the surface of the waterproof layer by applying a silicone emulsion on a surface of concrete or mortar that is the waterproof layer;

Forming a waterproof coating layer by applying a cement compound to the surface of the waterproof layer in which the waterproof sealing layer is formed; And,

Plasma mortar made by substituting a part of water with a silicone emulsion is formed on the coating layer to form a mortar layer.

The present invention will be described in more detail.

First, spray silicone coating on the inner wall (reinforced concrete, unreinforced concrete, etc.) or cement mortar (surface of waterproof layer) of concrete structure to prevent condensation. It is dried to form a waterproof sealing layer up to 15 mm thick.

Here, the silicone emulsion used for forming the waterproof sealing layer is 100 parts by weight of the silane represented by the following formula 1, 2 to 20 parts by weight of colloidal silica, preferably 5 to 10 parts by weight, emulsifier 2 to 40 parts by weight, alcohol 5 to It is composed of 20 parts by weight and water, and each component will be described in detail as follows.

[Equation 1]

In Formula 1, R is a hydrocarboxyl group having 2 to 17 carbon atoms, R 'is a hydrolyzable group, and n is 1 or 2.

Specifically, the silane may be ethyltriethoxysilane, ethyltrimethoxysilane, ethyltri-n-propoxysilane, propyltriethoxysilane, trophyltridimethylaminosilane, butyltriethoxysilane, butyltrimeth Oxysilane, isobutylethoxysilane, isobutyltrimethoxysilane, isobutyltriacetoxysilane, n-hexyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, octyltrimethoxysilane, octyl Methyldiisopropoxysilane, lauryltrimethoxysilane, 2-ethylhexyltrimethoxysilane, decyltriethoxysilane, dodecyltribromosilane, tetradecyltriethoxysilane, hexadecyltriethoxysilane, octadecyl Triethoxysilane and the like, which may be used alone or in combination with dimers, trimers and oligomers thereof. In particular, it is good to use the thing whose molecular weight of a monomer is 150-500.

The colloidal silica is preferably a silica sol having a pH of 8 to 11, the SiO ₂ content of 20% or less, and commercially available products such as Nalkok 1115, 2326 (manufactured by Nalco Chemical), Niacol 215 (manufactured by Niacol) ), Snowtex 20 (manufactured by Nissan Chemical), and Shiton W15 (manufactured by Monsanto).

The emulsifiers include polyoxypropylene mannitol dioleate, polyoxyethylene sorbitol oleate, polyoxyethylene stearate, sorbitan monostearate, sorbitan monooleate, glycerol monostearate, polyoxyethylene sorbitol hexastearate, One or more nonionic emulsifiers selected from sorbitan fatty acid esters composed of sorbitan tristearate and sorbitan trioleate, fatty acid glycerides, polyoxyethylene alcohols, and polyoxyethylene sorbitan fatty acid esters Use it. Moreover, it is more preferable to add and use a polyhydroxy compound to a nonionic emulsifier.

The alcohol is preferably 4 to 12 carbon atoms, a strong hydrogen bonding force, and a solubility parameter of 9 to 16, which is methanol, ethanol, n-butanol, isopropanol, 2-ethoxyethanol t Butanol, 2-ethylhexanol, isoamyl alcohol, n-octyl alcohol, 2-ethylbutanol, n-hexanol, n-amyl alcohol, cyclohexanol, n-propanol, benzyl alcohol and the like.

In addition, ground water, tap water, rainwater, etc. may be used as water, but distilled water is best used because the storage stability of the silicone emulsion is deteriorated by impurities contained therein.

Next, a spray coating or brush coating is applied to the surface of the concrete matrix on which the watertight sealing layer is formed, in an intermediate or upper degree, to form an inorganic coating waterproof layer having a thickness of up to 3 mm after drying.

The coating layer formed in this way not only plays a role of waterproofing but also has excellent interfacial adhesion with the mortar plastering layer applied thereon, even if the surface of the waterproof layer is poorly dried or poor in smoothness. There is no fear of poor adhesion between layers (lack of interfacial adhesion, lifting and breakage of waterproof layer).

The cement compound used for forming the waterproofing layer of the coating layer is 100: 20 to 300 parts by weight of at least one rubber latex composed of styrene butadiene rubber latex, acrylonitrile butadiene rubber latex, and chloroprene rubber latex alone or in an acrylic emulsion. After mixing with Soro Seal (Soro System Co., Ltd.) 5 to 50: 100 parts by weight, or mixed with an acrylic emulsion and cement alone or calcined with 10 to 30: 100 parts by weight of a certain amount to adjust the viscosity Use something made by adding water.

The acrylic emulsion is prepared by mixing an acrylic emulsifier 0.6-30 parts by weight and a reaction initiator 0.1-1 part by weight with 100 parts by weight of an acrylate monomer and then polymerizing the reaction at a temperature of room temperature to 200 ° C for 30 minutes to 24 hours.

Herein, the acrylic monomers include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl methacrylate, lauryl methacrylate and 2-hydride. Oxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate do.

As an emulsifier, dodecyl methyl ammonium bromide, hexadecyl trimethyl ammonium bromide, dodecyl pyridium chloride, and dodecyl hydrochloride are used individually or in mixture of 2 or more types.

Initiators include 2,2-azobis (2-amidipropane) dihydrochloride, 2,2-azobisisobutyronitrile, 2-tert-butyl azo-2-cyanopropane, 2-tert-butyl azo 2-cyanobutane, 2-tert-butyl azo-2-cyano-4-methylpentane, cumyl peroxide neodecanoate, tert-butyl peroxy-2-ethylhexanoate and the like can be used.

Next, a mortar plastering layer having a heat insulating property and a condensation preventing property is formed on the coating film waterproof layer to a thickness of up to 30 mm. Mortar plastering layer is a part of the water in the conventional mortar mix, that is, 5 to 50% by replacing with a silicone emulsion, and when sufficiently dried after plastering will not absorb or permeate the water, as well as having heat insulating properties and condensation prevention properties.

Hereinafter, as shown in FIG. 1, the waterproof sealing layer 12 is formed on the surface of the concrete matrix 10, and the waterproofing layer 20 and the mortar plastering layer 30 are formed thereon. The condensation prevention construction method will be described in detail by examples.

Example 1

First, 5 g of Nalcock 1115 (manufactured by Nalco Chemical Co., Ltd.), 7 g of 2-ethoxyethanol and 5 g of n-butanol are mixed as a colloidal silica. Then, 100 g of 2-ethylhexyltriethoxysilane is gradually added to the mixture, followed by stirring. After stirring and adding 20 g of sorbitol oleate, 360 g of distilled water was added thereto and diluted to obtain a stable milky silicone emulsion.

Then, 70 g of ethyl methacrylate and 30 g of 2-hydroxyethyl methacrylate were added 2.9 g of dodecylmethylammonium bromide as an emulsifier, followed by emulsification and dispersion with 230 g of water, followed by 2,2-azobis (2-azo) as a reaction initiator. 0.08 g of midipropane) dihydrocollide was injected and polymerized for 3 hours to give a milky acrylic emulsion. Next, 120 g of this acrylic emulsion, 1 kg of Soro Seal (manufactured by Soro System Co., Ltd.), and 360 g of water were mixed and stirred to prepare a cement compound.

The silicone emulsion obtained above was applied to the surface of the concrete sample of the same size as the cement brick (190 × 90 × 55 mm), and after the milky color disappeared, the cement compound was applied twice with a thickness of 1 mm using a brush. After 2 hours at room temperature, a mortar mixed with a volume of cement, sand, water, and silicone emulsion in a volume ratio of 1: 3: 0.6: 0.4 was plastered to a thickness of 12 mm and dried for 72 hours to prepare a sample.

After cutting one side of the sample and immersing it in water for 72 hours, it was taken out and observed for water penetration. When the mortar plaster layer separated by the waterproof sealing layer and the waterproof layer was not penetrated by water, the surface was cut through the cutting surface. The other part water soaked.

Example 2

A sample was prepared and immersed in the same manner as in Example 1 except that 879 g of Portland cement and 130 g of slaked lime were used together with the cement compound obtained by stirring together with 145 g of the acrylic emulsion obtained in Example 1 and 360 g of water. The result was similar to that of Example 1.

Example 3

Condensation prevention treatment is performed on the 3rd floor of the building below 3m in height and 4.2m in height by the same method as in Example 1, and it is applied to cement liquid waterproofing Class C / Mortal plastering in the same way as in Example 1, and then it is about 120mm in summer. After rain, we observed the condensation of wall at 26 ℃ and outside temperature at -18 ℃ in winter. At the time, the former had no condensation on the wall, while the latter had condensation on the wall, causing water to condense to the floor.

Example 4

The silicone emulsion prepared in Example 1 was used as it was, except that cement compound was used by mixing 1 kg of sawo seal, 60 g of acrylic emulsion, 60 g of SBR latex 2108 (manufactured by JSR Japan) and 340 g of water. Condensation was observed in the same manner, and condensation was the same as in Example 3.

Example 5

18 g of polyoxyethylene monooleate and 365 g of water were added to 100 g of octyl triethoxysilane, and then emulsified and dispersed. Then, 5 g of n-butanol and 5 g of n-octyl alcohol were mixed and mixed sufficiently, followed by colloidal silica niacol 215 (manufactured by Niacol Corporation). 10 g) was added and stirred to obtain a milky silicone emulsion.

Then, 65 g of ethyl methacrylate and 35 g of 2-ethylhexyl acrylate were added 2.6 g of dodecyl hydrochloride as an emulsifier, followed by emulsification and dispersion with 220 g of water, followed by 0.2 g of 2-tert-butylbutyl azo-2-cyanopropane as a reaction initiator. After addition and polymerization for 3 hours, a milky acrylic emulsion was obtained. Then, 120 g of the acrylic emulsion, 1 kg of sawo seals, and 360 g of water were added thereto to prepare a cement compound.

As a result of making the sample in the same manner as in Example 1, the thickness of the waterproof sealing layer by the silicone emulsion was thinly formed to 10 mm in case of brick and 2.5 mm in case of concrete, but showed the same characteristics as the sample of Example 1. .

Example 6

Using the silicone emulsion prepared in Example 5 and the cement-based compound as in Example 3 was compared to observe the condensation phenomenon, the results of Example 3 were the same.

As described in detail above, the present invention can completely prevent condensation by forming a waterproof sealing layer on the concrete matrix, which is the waterproof layer, and only waterproofing and finishing mortar plastering thereon without stacking a separate protective wall or installing insulation. At the same time, the construction is simple, which has the effect of shortening the air, reducing the cost, and preventing lifting of the plaster layer.

Claims (10)

Forming a waterproof sealing layer inside the surface of the waterproof layer by applying a silicone emulsion on a surface of concrete or mortar that is the waterproof layer; Forming a waterproof coating layer by applying a cement compound to the surface of the waterproof layer in which the waterproof sealing layer is formed; And, Plastering mortar formed by substituting a part of water with a silicone emulsion on top of the coating layer to form a mortar layer; Condensation prevention method of concrete building comprising a. The method of claim 1, wherein the silicone emulsion is composed of 100 parts by weight of silane, 2 to 20 parts by weight of colloidal silica, 2 to 30 parts by weight of emulsifier, 5 to 20 parts by weight of alcohol, and water. . The method of claim 2, wherein the silane is represented by the following formula. [expression]

(Wherein R is a hydrocarboxyl group having 2 to 17 carbon atoms, R 'is a hydrolyzable group and n is 1 or 2) 4. The silane according to claim 3, wherein the silane is ethyltriethoxysilane, ethyltrimethoxysilane, ethyltri-n-propoxysilane, propyltriethoxysilane, trophyltridimethylaminosilane, butyltriethoxysilane, butyl Trimethoxysilane, isobutylethoxysilane, isobutyltrimethoxysilane, isobutyltriacetoxysilane, n-hexyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, octyltrimethoxysilane , Octylmethyldiisopropoxysilane, lauryltrimethoxysilane, 2-ethylhexyltrimethoxysilane, decyltriethoxysilane, dodecyltribromosilane, tetradecyltriethoxysilane, hexadecyltriethoxysilane, An octadecyltriethoxysilane, at least one selected from dimers, trimers and oligomers thereof, for preventing condensation in concrete buildings. The method of claim 2, wherein the colloidal silica is a silica sol having a pH of 8 to 11, SiO ₂ content of 20% or less. The method of claim 2, wherein the emulsifier is polyoxypropylene manitol dioleate, polyoxyethylene sorbitol oleate, polyoxyethylene stearate, sorbitan monostearate, sorbitan monooleate, glycerol monostearate, polyoxyethylene At least one selected from sorbitan fatty acid esters composed of sorbitol hexastearate, sorbitan tristearate, and sorbitan trioleate, fatty acid glycerides, polyoxyethylene alcohols, and polyoxyethylene sorbitan fatty acid esters Condensation prevention treatment method of concrete building to assume. The condensation prevention treatment method for a concrete building according to claim 2, wherein the alcohol has 4 to 12 carbon atoms and a solubility parameter value of 9 to 16. The method of claim 1, wherein the cement compound is a mixture of acryl emulsion alone or at least one rubber latex consisting of styrene butadiene rubber latex, acrylonitrile butadiene rubber, chloroprene rubber latex mixed with the sawo seals and then a predetermined amount of water Condensation prevention treatment method of concrete building characterized in that it is made. The method of claim 1, wherein the cement compound is mixed with cement alone or with slaked lime and then added to water in an acrylic emulsion. 10. The method of claim 8 or 9, wherein the acrylic emulsion is methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl Methacrylate, lauryl methacrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, ethyl amethacrylate, isopropyl acrylate, n-butyl acrylate, 2 At least one acrylate monomer composed of ethylhexyl acrylate, at least one anionic emulsifier composed of dodecylmethylammonium bromide, hexadecyltrimethylammonium bromide, dodecylpyridium chloride, dodecylhydrochloride, and 2, 2-azobis (2-amidipropane) dihydrochloride, 2,2-azobisisobutyronitrile, 2-tertiarybutylazo-2-cyanoprop , 2-tert-butyl azo-2-cyanobutane, 2-tert-butyl azo-2-cyano-4-methylpentane, cumyl peroxide neodecanoate, tert-butyl peroxy-2-ethylhexano Condensation prevention treatment method of concrete, characterized in that the polymerization reaction by mixing at least one reaction initiator consisting of a.

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