KR100976956B1 - Method of liquid typed inorganic waterproof agent - Google Patents

Abstract

PURPOSE: A producing method of a liquid typed inorganic waterproof agent is provided to improve the intensity and the corrosion resistance of a concrete structure by being penetrated into the surface of the structure. CONSTITUTION: A producing method of a liquid typed inorganic waterproof agent comprises the following steps: forming a first solution by mixing oleic acid and purified water inside a reaction bath(S10); mixing sodium m-silicate with the purified water and dissolving the mixture to make a second solution(S20); forming an ivory white syrup by inserting the second solution to the first solution(S30); and mixing silica sol with the ivory white syrup(S40). The ivory white syrup is produced by maintaining the temperature of the reaction bath at 40 deg C, and inserting the second solution slowly over 1 hour while stirring the mixture in an 80 rpm speed.

Description

Method for producing liquid-type inorganic penetration waterproofing material {method of liquid typed inorganic waterproof agent}

The present invention relates to a method for manufacturing a liquid inorganic penetration waterproofing material, and more particularly, to form an insoluble tissue having a stable crystal structure by penetrating the surface of a concrete structure, etc. and to form a waterproof film to prevent the intrusion of water and cause the structure to deteriorate. The present invention relates to a method for producing a liquid-type inorganic penetration waterproofing material which prevents generation of various harmful substances in advance.

In general, concrete structures are known to have a service life of 50 years, but increasing acid pollution and dust due to increasing environmental pollution, carbon dioxide, sulfurous acid gas, nitrogen compounds, chlorine, etc., shorten the life of the structure. .

In addition, the underground surface water is dissolved in sulfates, monoacids, and the like to damage the concrete structure. This deterioration inevitably leads to massive repairs and reconstructions, resulting in huge economic losses.

In case of leakage due to the lack of waterproof performance of concrete structure, compressive strength, freeze-thawing resistance, and resistance to chemical erosion are reduced, which shortens the life of the structure and greatly reduces the aesthetic damage of the building and the habitability as living space. It causes a great loss economically.

Therefore, to solve this problem, the present invention is to form and insoluble tissue to have a stable crystal structure by coating and penetrating the surface of the concrete structure, to form a waterproof film to prevent the intrusion of water and to cause various harmful substances that cause degradation of the structure It is an object of the present invention to provide a method for producing a liquid-type inorganic penetration waterproofing material which can be prevented in advance to extend the life of a building structure.

In order to achieve the above object, the present invention provides 10 to 15 parts by weight of m-sodium silicate, 0.1 to 0.3 parts by weight of surfactant, 5 to 15 parts by weight of water-repellent saturated fatty acid, and 5 to 10 parts by weight of silica sol as an adsorbent, It provides a liquid inorganic penetration waterproofing material, characterized in that consisting of 50 to 70 parts by weight of distilled water for dilution.

At this time, the surfactant is characterized in that the dialkyl sulfosuccinate (Dialkyl Sulfosuccinate).

In addition, the water-repellent saturated fatty acid is characterized in that any one of oleic acid, stearic acid, fumaric acid.

In addition, the present invention is 5 to 15 parts by weight of oleic acid, 0.1 to 0.3 parts by weight of dialkyl sulfosuccinate (anionic surfactant) and 25 to 35 parts by weight of purified water to the reaction tank to emulsify the primary solution Generating a first step; a second step of dissolving 10-15 parts by weight of m-sodium silicate in 25-35 parts by weight of purified water to produce a secondary solution; A third step of preparing the milky syrup by dropwise addition of the secondary solution to the reactor for 0.5 to 1.5 hours, and for 2.5 to 3.5 hours while maintaining the temperature of the primary solution at 35 to 45 ° C. step; The fourth step of adding and mixing 5 to 10 parts by weight of the silica sol to the milky white syrup obtained through the third step; also provides a method for producing a liquid-type inorganic penetration waterproofing material comprising a.

At this time, the first solution of the first step is characterized in that it is produced by rotating and stirring at a rate of 100 ~ 140rpm for 0.5 ~ 1.5 hours while maintaining 35 ~ 45 ℃ in the reaction tank.

The syrup of the third step was added dropwise to the reactor for 0.5 to 1.5 hours while stirring and rotating at a speed of 60 to 100 rpm while maintaining a temperature of 35 to 45 ° C. in the reactor, and 2.5 to It is characterized in that it is produced by reacting for 3.5 hours.

Impregnating the liquid-type inorganic penetration waterproofing material according to the present invention to the surface of the concrete structure, such as increasing the strength and corrosion resistance of the concrete structure, and imparting waterproofing by reducing the permeability and absorption, thereby impairing performance and economic loss due to deterioration of the concrete structure Has the effect of reducing

In particular, when the liquid-type inorganic permeable waterproofing material according to the present invention penetrates into the surface of concrete, the waterproofing material penetrates deeply into the concrete, reacts with the water-soluble material, forms an insoluble tissue having a stable crystal structure, forms a waterproofing membrane, prevents water ingress, and causes deterioration. Chloride ions, carbon dioxide, and intrusion can be prevented in advance to significantly improve the durability of the concrete structure, as well as useful to repair and reinforce the deteriorated structure.

Hereinafter, with reference to the accompanying drawings, a liquid inorganic penetration waterproofing material and a method for manufacturing the same according to the present invention will be understood by the embodiments described in detail below.

At this time, Figure 1 is a manufacturing process chart of the liquid-type inorganic penetration waterproofing material according to the present invention.

The present invention is a liquid inorganic penetration waterproofing material 10 to 15 parts by weight of m-sodium silicate, 0.1 to 0.3 parts by weight of surfactants (anionic and nonionic), 5 to 15 parts by weight of water-repellent saturated fatty acids (C ₁₂ ~ C ₁₈ ) And 5 to 10 parts by weight of silica sol, which is an adsorbent, and 50 to 70 parts by weight of distilled distilled water.

First, the m-sodium silicate (Sodium metasilcate) is a molecular formula Na ₂ OSiO ₂ * 5H ₂ O or Na ₂ OSiO ₂ * 9H ₂ O, white lip has a strong penetration soluble in water.

Dialkyl Sulfosuccinate is used as the surfactant. The dialkyl sulfosuccinate is mainly used as a wetting or penetrating agent as an anionic surfactant.

On the other hand, as the water-repellent saturated fatty acids (C ₁₂ ~ C ₁₈ ) is used a higher fatty acid, such higher fatty acids may be used oleic acid, stearic acid, fumaric acid and the like, preferably oleic acid.

These higher fatty acids have excellent self-water repellency, which reduces water absorption by capillaries in concrete.

Next, the colloidal silica (SiO ₂ , xH ₂ O) is an ultra fine colloidal solution having a particle diameter of about 10 to 20 μm, and easily penetrates into capillaries and fine pores of a concrete structure, and thus, silica is a component. Reaction with the resulting calcium hydroxide (Ca (OH) ₂ ) forms a calcium silicate CSH (mCaO.SiO ₂ .nH ₂ O) bond. Such a large amount of calcium silicate CSH is densely packed in the pores of the concrete to improve the waterproofing and fire resistance, thereby exhibiting the effect of inhibiting the penetration of chlorides and excellent rust resistance to the steel structure.

Such liquid inorganic penetration waterproofing material according to the present invention is prepared through a process as shown in FIG.

(S10; emulsification step)

First, 5 to 15 parts by weight of oleic acid, which is a water-repellent saturated fatty acid (C ₁₂ to C ₁₈ ), 0.1 to 0.3 parts by weight of dialkyl sulfosuccinate, which is an anionic surfactant, and 25 to 35 parts by weight of purified water Emulsification gives a primary solution.

At this time, the emulsification reaction is added to the oleic acid, dialkyl sulfosoxinate and purified water in a known reaction tank (not shown) to rotate and stirred at a speed of 100 ~ 140rpm (preferably 120rpm). The emulsification is such that the primary solution is maintained at 35-45 ° C. (preferably 40 ° C.), and takes 0.5-1.5 hours (preferably 1 hour).

(S20; m-sodium silicate dissolution step)

10 to 15 parts by weight of m-sodium silicate is dissolved in 25 to 35 parts by weight of purified water to produce a secondary solution.

At this time, the m-sodium silicate is easily dissolved in purified water (water) and can be manufactured without using a different temperature condition or a separate device.

(S30; syrup manufacturing step)

Maintain the temperature of the primary solution obtained through the step (S20; emulsification step) at 35 ~ 45 ℃ (preferably 40 ℃) and the rotation speed of the reaction tank (not shown) 60 ~ 100rpm (preferably 80rpm) ), The secondary solution obtained through the step (S20; m-sodium silicate dissolution step) is added dropwise to the reactor (not shown) for 0.5 to 1.5 (preferably 1 hour) time, It is reacted for 2.5 to 3.5 hours (preferably 3 hours) to prepare a milky syrup.

(S40; silica sol mixing step)

5 to 10 parts by weight of silica sol is added to and mixed with the milky white syrup obtained through the step (S30; syrup manufacturing step) to prepare a liquid inorganic penetration waterproofing material according to the present invention.

The above steps (S10 to S40) can also be carried out within the optimized range of the numerical value of the components within the range of parts by weight, temperature, time.

For example, in the step (S10; emulsification step), 10 parts by weight of oleic acid, 30 parts by weight of water, 0.2 parts by weight of surfactant is put into the reaction tank while maintaining the rotation speed at 40 rpm while stirring the rotation speed 120rpm for 1 hour To produce a primary solution, and 12 parts by weight of sodium m-silicate and 35 parts by weight of water were mixed through the step (S20; m-sodium silicate dissolution step) to generate a secondary solution, and (S30; syrup manufacturing step). The secondary solution is slowly added to the reactor for 1 hour and reacted for 3 hours to prepare a milky syrup. Then, by mixing 10 parts by weight of the silica sol (Colloidal Sillica) through the step (S40; silica sol mixing step) to prepare a liquid-type inorganic penetration waterproofing material according to the present invention is a milky white amorphous solution.

Liquid inorganic penetration waterproofing material according to the present invention manufactured through the above process is deeply penetrated through the capillary or fine pores of the concrete, brick, stone surface when cement is applied to the surface of the inorganic material such as concrete, brick, stone of the building structure cement It slowly combines with calcium hydroxide (Ca (OH) ₂ ) produced during the hydration reaction to form an insoluble CSH gel, which fills the mother tube and pores to confine the sphere to improve durability, thereby eliminating the cause of surface waterproofing and deterioration of building structures.

Liquid type inorganic penetration waterproofing material according to the present invention is particularly preferably used for waterproofing, anticorrosion, flame resistance, neutralization of concrete structures, civil structures, marine structures, wastewater treatment plants, waterworks, railways, bridges, etc., excellent construction results The effect was confirmed by the following application example.

First of all, the concrete surface, foreign matter, oil and paint, etc. are removed from the construction surface of the building structure, and then the protrusions are removed, and the cracks and trenches are filled with epoxy mortar. In addition, after hitting the concrete using a shot blast or water jet, a fine substance inside is raised due to curing (a phenomenon of rising water), and the white color is formed on the surface after the concrete is cured. By removing the thin layer of laitance completely, the concrete construction surface is neatly trimmed and 0.4L / m2 is applied and penetrated with a low pressure (5kg / ㎠) spray or roller. The number of coatings can be adjusted according to the conditions.

Hereinafter, a test example of the liquid-type inorganic penetration waterproofing material according to the present invention will be described in detail.

Test Example 1 Measurement of Chloride Ion Penetration Resistance (KS F4930)

A test specimen of 100 × 100 × 100 mm size was prepared from test specimen mortar with a weight ratio of cement, sand and water of 1: 2.5: 0.65, and the liquid inorganic permeation waterproofing material according to the present invention was applied to the bottom of the specimen, and 2.5% sodium chloride was used. It was immersed in aqueous solution for 7 days. Thereafter, the mixture was dried at room temperature for 24 hours, sprayed with 0.1 N aqueous solution of silver nitrate, and burned on a cross section of the test body, which was divided into two parts. The average value of the nine measured values obtained by measuring the depth of the color development portion of each of the three test specimens was defined as chloride ion penetration depth, as shown in Table 1 below.

TABLE 1

   Chloride ion penetration depth (㎜)    Experimental Example 1    0.02    Experimental Example 2    0.023    Experimental Example 3    0.019    Experimental Example 4    0.18

As shown in Table 1, when the liquid-type inorganic permeation waterproofing material according to the present invention was applied to the test body and permeated, it was confirmed that it can be effectively used to prevent salt and neutralization of concrete because it completely inhibits the penetration of chloride ions.

Test Example 2 Water Permeability Measurement

As a result of the water permeability test using the test body according to the KS F4930 test standard is shown in Table 2 below.

TABLE 2

   Pitching cost    Experimental Example 1    0.26    Experimental Example 2    0.23    Experimental Example 3    0.29    Control (no treatment)    One

As shown in Table 2, the liquid inorganic penetration waterproofing material according to the present invention was confirmed to be an excellent waterproofing material by significantly lowering the permeability ratio compared to the control.

Test Example 3 Measurement of Absorption Resistance

As a result of testing the water absorption resistance using the test body according to the KS F4930 test standard is shown in Table 3 below.

[Table 3]

   Standard condition After alkali resistance test Low temperature, high temperature
After repeated resistance test    Experimental Example 1    0.08    0.9    0.16    Experimental Example 2    0.07    0.09    0.10    Experimental Example 3    0.05    0.07    0.10    Control (no treatment)    One    One    One

As shown in Table 3, the liquid-type inorganic penetration waterproofing material according to the present invention can be confirmed to have excellent waterproofing performance by significantly lowering the water absorption coefficient ratio compared to the control.

As described above, embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

1 is a manufacturing process chart of the liquid-type inorganic penetration waterproofing material according to the present invention.

Claims (6)

delete delete delete (a) 10 parts by weight of oleic acid and 30 parts by weight of purified water are added to a reaction tank to produce a primary solution; (b) mixing 35 parts by weight of purified water with 12 parts by weight of m-sodium silicate and dissolving to produce a secondary solution; (c) preparing a milky syrup by adding a secondary solution to the primary solution; (d) a method of producing a liquid-type inorganic penetration waterproofing material comprising mixing 10 parts by weight of a silica sol (Colloidal Sillica) to the milky white syrup, 0.2 parts by weight of dialkyl sulfosuccinate was added to the primary solution, mixed, and the formation of the primary solution was carried out for 1 hour while maintaining the reactor at 40 ° C. while stirring the reactor at a rotational speed of 120 rpm. Raising, The preparation of the milky white syrup is characterized by maintaining the reaction tank temperature of the primary solution at 40 ℃ and slowly adding the secondary solution for 1 hour while rotating stirring at a speed of 80rpm to react for 3 hours Way. delete delete

Images