KR20130117911A - The penetrating waterproof agent and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A penetrating waterproof material is provided to form a gel in a state that the waterproof material penetrates from the surface of a concrete and the bottom of pores, thereby improving strength of concrete and making charging possible regardless of the depth of the pores. CONSTITUTION: A penetrating waterproof material is obtained by adding NaOH solution into the mixture solution of sodium silicate and aluminum silicate in which liquid sodium silicate(or Na2OSiO2) as an adhesive liquid aluminum silicate and liquid aluminum silicate as a reinforcing agent is mixed with the molar ratio of 1:1 and stirring the materials in a reactor rotating at 500 RPM at 50-80 °C for 30 minutes. The weight ratio of the NaOH solution to the total weight of the mixture solution is 1:0.3-1:0.7.

Description

Penetrating waterproof agent and manufacturing method

The present invention relates to a permeable waterproofing material and a method for manufacturing the same, and more specifically, a predetermined amount of sodium hydroxide solution is further added to and mixed with liquid sodium silicate and aluminum silicate mixed in a molar ratio of 1: 1 to apply or spray to the pores of concrete. The present invention relates to a permeable waterproof material and a method of manufacturing the same that are gelled in the pores of the city to reform concrete and thereby increase the resistance to absorption and permeability of the concrete.

In general, concrete has been recognized as a semi-permanent structural material due to its excellent durability and compressive strength, but ageing is promoted as time passes due to various physical, chemical and environmental factors, so that the surface of the concrete is left unprotected. In this case, aggregate exposure, surface peeling, cracking, rebar exposure, and corrosion strength reduction, combustion ion penetration, increased porosity, carbonation, salting, and water leakage may cause various deterioration phenomena such as deterioration of concrete structure and durability. This will lead to a serious problem.

In order to solve the above problems, waterproofing is being carried out on the roof, floor, and inside and outside walls of buildings. As a general waterproofing method, water and bibim are caused by excess water mixed in concrete or mortar. Permeable waterproofing materials that physically increase resistance to absorption and permeation by filling voids such as capillaries and the like directed to the surface with air, bleeding, etc. to the surface are mainly used.

The waterproofing method using the permeable waterproofing material is to promote the hydration reaction of cement to increase the resistance to absorption and permeation by physically filling the initial pores with cement gel, and is made of sodium silicate (or sodium silicate: Na2OSiO2) as a main component. The inorganic permeable waterproofing material is dried in the state where it is applied or injected into the concrete waterproofing position or the repairing position. At this time, the gel is formed while reacting with calcium hydroxide in the concrete to fill the voids to form the waterproofing waterproofing protection layer. The concrete is being reformed.

However, in the case of the concrete pores, there are a plurality of holes from the larger diameter to the smaller diameter, and the pores are continuously connected to each other.

Therefore, when waterproofing concrete only through the inorganic permeable waterproof material containing only sodium silicate, since the viscosity of sodium silicate is high, the reaction rate with calcium in the concrete is fast, and gels in a short time so that the pores of concrete are connected from the surface to the bottom. Sodium silicate coated or sprayed on the surface is crystallized even before it penetrates to the bottom, thereby lowering the effect of reforming the concrete.

Therefore, an object of the present invention is to slow the reaction rate with calcium in concrete so that the waterproofing material can be gelated in a deep penetration state from the surface to the bottom into the pores of the concrete to penetrate the waterproof material and a method for manufacturing the same that can be modified. To provide.

In addition, another object of the present invention is the addition of a predetermined amount of sodium hydroxide solution in the liquid sodium silicate and aluminum silicate mixed in a molar ratio of 1: 1, the gel inside the pores when applied or sprayed to the pores of concrete It is to provide a permeable waterproof material and a method of manufacturing the same to reform the concrete and thereby increase the resistance to absorption and permeability of the concrete.

Meanwhile, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

To this end, according to the present invention, a liquid mixture of sodium silicate and aluminum silicate in a state in which a liquid sodium silicate (or sodium silicate) serving as an adhesive and a liquid aluminum silicate serving as a coagulant or a reinforcing agent are mixed in a molar ratio 1: 1 ratio. To a predetermined amount, that is, a sodium hydroxide solution is added so that the weight ratio with the mixed liquid is 1: 0.3 to 1: 0.7 with respect to the total weight with the mixed liquid, and the reactor rotates at 300 RPM to 500 RPM at a temperature of 50 ° C to 80 ° C. When stirred for about 30 minutes in the concrete, it penetrates deeply into the pores when applied or sprayed to concrete and reacts with calcium hydroxide in the concrete which is corroded by sodium hydroxide to form an alkali calcium silicate to fill the pores, and the alumina of aluminum silicate is the alkali calcium silicate. It is provided with a permeable waterproof material which is adsorbed on to improve the strength of concrete.

On the other hand, according to the present invention, the step of mixing the liquid sodium silicate (or sodium silicate) serving as an adhesive and the liquid aluminum silicate serving as a coagulant or reinforcing agent in a molar ratio of 1: 1; Sodium hydroxide solution is added to the mixed solution so that the weight ratio of the mixed solution to the total weight of the mixed solution is 1: 0.3 to 1: 0.7, and is rotated at 300 RPM to 500 RPM at a temperature of 50 ℃ to 80 ℃ Stirring for about 30 minutes; And a step of filtering the stirred mixed solution and the resulting solution of the sodium hydroxide solution through a membrane filter having a through hole of 1 μm to 3 μm.

Therefore, according to the present invention, when applied to the concrete according to the weight ratio of sodium hydroxide and the mixed liquid, the gelation in the state penetrated deeply into the surface as well as the bottom of the pores, enabling filling irrespective of the depth of the pores and at the same time the strength of the concrete To improve the concrete.

In addition, the two alkaline components neutralize the acidic components with respect to acid rain and absorb carbon dioxide, and the carbon dioxide reacts with calcium hydroxide to become calcium carbonate, thereby preventing the concrete from being neutralized. .

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing a modified state by the waterproofing material in the concrete sprayed or sprayed with a waterproofing material according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a modified state by the waterproofing material in the concrete sprayed or sprayed with a waterproofing material according to a preferred embodiment of the present invention.

As shown in FIG. 1, the permeable waterproof material CC according to the preferred embodiment of the present invention is gelled in a state deeply penetrated into the void O existing from the surface to the bottom in the concrete C. It is for reforming concrete (C), in which liquid sodium silicate (or sodium silicate: Na2OSiO2) serving as an adhesive and liquid aluminum silicate (Al2OSiO4) serving as a coagulant or reinforcing agent are mixed in a molar ratio of 1: 1. A sodium hydroxide (NaOH) solution is added to the mixed liquid of sodium silicate and aluminum silicate so that the weight ratio of the mixed liquid to a predetermined amount, that is, the total weight of the mixed liquid is 1: 0.3 to 1: 0.7, and the temperature is 50 ° C to 80 ° C. 30 minutes in the reactor rotating from 300 RPM to 500 RPM in the control of the gelation rate by adjusting the viscosity of sodium silicate to penetrate deeply into the pores (O) when applied or sprayed on the concrete (C) By the reaction with calcium hydroxide (Ca (OH) 2) in concrete (C), which is corroded by sodium hydroxide, it becomes an alkali calcium silicate to fill the pores (O), and the alumina of aluminum silicate (Al2O3) It is adsorbed on the alkali calcium silicate to improve the strength of the concrete (C) to enable the concrete (C) modification.

Here, the mixture of sodium silicate and aluminum silicate is preferably mixed in a molar ratio of 1: 1, which may allow silicic acid (SiO 3) to have a maximized catalyst role when reacting with calcium hydroxide. That is, when the molar ratio of 1: 1 does not occur, the chemical reaction between the mixed solution and calcium hydroxide occurs quickly or slowly, so that the rate of gelation may not be controlled as desired by mixing the weight ratio of calcium hydroxide. Therefore, when the sodium silicate and aluminum silicate are mixed in a molar ratio of 1: 1, the above problems can be prevented.

On the other hand, the sodium hydroxide solution is added with a weight ratio of 1: 0.3 to 1: 0.7 with respect to the total weight with the mixed solution as described above is added to the liquid is added to 300 RPM to 500 at a temperature of 50 ℃ to 80 ℃ When stirred in a reactor rotating at RPM, the silicic acid in the mixed solution is formed into a gelatinous siliceous having an appropriate viscosity.

Here, when the weight ratio of the sodium hydroxide solution is less than 0.3 compared to the mixed solution, the sodium ions contained in the liquid sodium silicate are not smoothly changed to the hydrophilicity released by water, so that the liquid sodium silicate is formed as a gelatinous silicate having a high viscosity. When it is applied to large-crete (C), a chemical reaction with calcium hydroxide occurs quickly and gelates quickly, so that it does not penetrate to the bottom of the pores (O) and is already excessively crystallized in the upper part of the pores (O) away from the surface by a predetermined distance. Only alkaline calcium silicate will fill the pores (O). When the weight ratio of the sodium hydroxide solution is greater than 0.7 compared to the mixed solution, the sodium ions contained in the liquid sodium silicate are easily changed to hydrophilicity released by water, so that the liquid sodium silicate is formed into a gelatinous silicate having a low viscosity. When the coating is applied to the crete (C), the strength is reduced so that a chemical reaction with calcium hydroxide does not occur, so that even if it penetrates to the bottom of the pore (O), it cannot be crystallized by alkali calcium silicate and thus cannot fill the pore (O).

Therefore, the weight ratio of the sodium hydroxide solution preferably has a weight ratio of 1: 0.3 to 1: 0.7 relative to the total weight of the mixed solution. Optionally, the weight ratio of the sodium hydroxide solution is preferably based on the case where the weight ratio of the mixed liquid and the total liquid is 1: 0.5 based on the weight ratio of the mixed liquid.

That is, when the waterproofing material (CC) is applied to the concrete (C) initially, a predetermined amount of the waterproofing material (CC) having a weight ratio of 1: 0.3 based on the total weight of the mixed solution and the sodium hydroxide solution is deeply extended to the bottom layer of the concrete (C). By penetrating and gelling, and then the mixed liquid and sodium hydroxide solution is gelled in a state in which a predetermined amount of waterproofing material (CC), which is sequentially mixed in a weight ratio of 1: 0.4 to 0.7 with respect to the total weight, is applied to the surface layer of concrete (C), It is preferable that the entirety of the pores O of the concrete C is filled with alkali calcium silicate.

Therefore, the above-described waterproofing material (CC) includes two alkalis of sodium (Na) and alumina (Al2O3), and in the case of an aqueous alkali silicate solution having a low viscosity depending on the degree of addition of sodium hydroxide solution, sodium and Since alumina shortens the anionic chain of silicic acid and delays gelation, the time required for gelation becomes long, and it reacts with calcium hydroxide of concrete (C) which is corroded by sodium hydroxide in the deep penetration into the bottom layer of concrete (C). That is, the calcium cation of calcium hydroxide chains with the anions of silicic acid to form calcium silicate chains, and these are bonded to each other to gel to form alkali calcium silicates and fill the pores (O) of the concrete (C).

Therefore, the concrete penetration depth of the waterproofing material (CC) can be sufficiently controlled by adjusting the weight ratio of the mixed solution and the sodium hydroxide solution according to the depth of the concrete (C), thereby allowing the entire void (O) regardless of the depth of the concrete (C). Filling may enable the modification of concrete.

On the other hand, in the waterproofing material (CC) as described above, sodium hydroxide corrodes the concrete (C) during penetration for the filling of the pores (O) of the concrete (C), and the calcium cation of calcium hydroxide, a by-product thereof, chain-bonds with anions of silicic acid. Since the solution is gelled, the overall strength of the concrete (C) may be greatly reduced even when the pores (O) are filled, but at this time, the alumina cation is chain-linked with other calcium anions that do not react with the anion of silicic acid to form concrete ( The strength of C) can be improved.

Therefore, according to the waterproofing material (CC) as described above, when applied to the concrete (C) in accordance with the weight ratio of sodium hydroxide and the mixed liquid by gelation in the state of deep penetration (up to about 200mm) not only the surface but also the bottom of the void (O), In addition to enabling filling irrespective of the depth of the voids (O), it is possible to improve the strength of the concrete (C) to enable the concrete modification.

In addition, the two alkaline components neutralize the acidic components against acid rain, absorb carbon dioxide, and react with calcium hydroxide to form calcium carbonate resulting in neutralization of concrete (C). can do.

Hereinafter, a method for manufacturing a permeable waterproofing material according to a preferred embodiment of the present invention will be described in detail.

First, a liquid sodium silicate (or sodium silicate: Na 2 OSiO 2) serving as an adhesive and a liquid aluminum silicate (Al 2 OSiO 4) serving as a coagulant or a reinforcing agent are mixed in a molar ratio 1: 1.

Here, the liquid sodium silicate is called water glass and is a transparent solution showing viscous alkali property. The molar ratio of liquid sodium silicate determined by Korean Industrial Standard (KS M 1415) is 1: 2.064 to 1: 4.300 for Na2O and SiO2. It can have several compositions. In addition, the liquid aluminum silicate does not dissolve in water as a solid of white powder and reacts with calcium hydroxide in concrete (C) to play a role of improving the strength of concrete (C).

Thereafter, a sodium hydroxide solution is added to the mixed solution such that the weight ratio of the mixed solution is 1: 0.3 to 1: 0.7 with respect to the total weight of the mixed solution and rotated at 300 RPM to 500 RPM at a temperature of 50 ° C. to 80 ° C. It is stirred for about 30 minutes in the reactor.

Here, the stirring time varies depending on the reaction temperature, but since the movement of molecules is active at the temperature of 50 ° C. to 80 ° C., sufficient stirring efficiency may be obtained in about 30 minutes.

Thereafter, the agitated mixed solution and the resulting solution of the sodium hydroxide solution are filtered through a membrane filter having a pore size of 1 μm to 3 μm to filter out agglomerated alumina in aluminum silicate that is not soluble in water during stirring.

Here, when the sodium hydroxide solution is sequentially blended from 0.3 to 0.7 with respect to the weight ratio of the mixed solution to the total weight with the mixed solution, the hydrophilicity of the sodium ions contained in the liquid sodium silicate is gradually smoothed according to the weight ratio increase. As it is dissolved, it is formed of gelatinous silicate with a high viscosity of liquid sodium silicate, and when applied to large crit, the rate of gelation is gradually increased through chemical reaction with calcium hydroxide. In the mixed solution and sodium hydroxide solution, a predetermined amount of waterproofing material (CC) having a weight ratio of 1: 0.3 to the total weight is allowed to penetrate deeply to the bottom layer of concrete (C), and after a predetermined time, the mixed solution and sodium hydroxide solution are subsequently added. With respect to the total weight, a predetermined amount of waterproofing material (CC) mixed at a weight ratio of 1: 0.4 to 0.7 was added to the surface layer of concrete (C). By making stepwise applied and gelled with, the total void (O) of the concrete (C) it can be charged by the alkaline calcium silicate.

On the other hand, the concrete (C), which has been corroded by sodium hydroxide during penetration for the filling of the pores (O) of the concrete (C), is reinforced by the reaction coupling of the alumina cation of aluminum silicate and other calcium anions that do not react with the anion of silicic acid. The strength can be improved.

Therefore, the waterproofing material (CC) prepared by the above step is applied to the concrete (C) can be filled with the voids (O) of the concrete (C) as a whole, the strength can be improved.

Hereinafter, a method for manufacturing a permeable waterproof material according to a preferred embodiment of the present invention will be described in detail by implementing according to the following embodiment.

Example 1 Sodium Hydroxide Solution When the Weight Ratio of the Mixed Solution Is Prepared to 1: 0.3 to the Total Weight

In a state where liquid sodium silicate and liquid aluminum silicate are mixed in a molar ratio of 1: 1, a sodium hydroxide solution is added so as to be 1: 0.3 with respect to the weight ratio of the mixed liquid to the total weight of the mixed liquid, and thus 50 ° C. to 80 ° C. After stirring for about 30 minutes in a reactor rotating at 300 RPM to 500 RPM at a temperature of and filtered through a membrane filter to prepare a waterproof material (CC).

Example 2 Sodium Hydroxide Solution When the Weight Ratio of the Mixture Is Prepared to 1: 0.5 to the Total Weight

In a state where the liquid sodium silicate and the liquid aluminum silicate are mixed in a molar ratio of 1: 1, a sodium hydroxide solution is added so as to be 1: 0.5 to the weight ratio of the mixed liquid to the total weight of the mixed liquid, and thus 50 to 80 ° C. After stirring for about 30 minutes in a reactor rotating at 300 RPM to 500 RPM at a temperature of and filtered through a membrane filter to prepare a waterproof material (CC).

Example 3 Sodium Hydroxide Solution When the Weight Ratio of the Mixture Is Prepared to 1: 0.7 Based on the Total Weight

In a state where the liquid sodium silicate and the liquid aluminum silicate are mixed in a molar ratio of 1: 1, a sodium hydroxide solution is added so as to be 1: 0.7 to the weight ratio of the mixed liquid to the total weight of the mixed liquid and thus 50 to 80 ° C. After stirring for about 30 minutes in a reactor rotating at 300 RPM to 500 RPM at a temperature of and filtered through a membrane filter to prepare a waterproof material (CC).

Subsequently, concrete having the same area, depth, number of voids, and compressive strength of the waterproofing material (CC) prepared according to Examples 1 to 3 and the commercially available waterproofing material (A), that is, sodium silicate as a main component After application to (C), the results of penetration depth, void filling depth, and compressive strength after a certain period of time are shown in Table 1 below.

Test Items Example 1 Example 2 Example 3 A Penetration depth 200mm or more 100mm-200mm 100mm 50mm Void filling depth 200mm or less 100mm-200mm 0mm-100mm 0mm-50mm Compressive strength 287kg / cm2 or more 287kg / cm2 or more 287kg / cm2 278kg / cm2 or less

 Thus, as shown in Table 1, the permeable waterproofing material (CC) of Examples 1 to 3 according to the present invention, the weight ratio of the total weight of sodium hydroxide compared to the inorganic permeable waterproofing material containing only sodium silicate as a general component According to the production method of Examples 1 to 3, by allowing the formation of the alkali calcium silicate, the penetration depth of the concrete (C) and the filling depth of the pores can be adjusted according to the voids (O) In addition to enabling the filling irrespective of the depth of the) can be improved concrete (C) to improve the strength of the concrete.

While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains have various permutations and modifications without departing from the spirit or essential features of the present invention. It is to be understood that the present invention may be practiced in other specific forms, as modifications are possible. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (2)

A predetermined amount is added to the mixed solution of sodium silicate and aluminum silicate in a state in which a liquid sodium silicate (or sodium silicate: Na 2 OSiO 2) serving as an adhesive and a liquid aluminum silicate (Al 2 OSiO 4) serving as a coagulant or a reinforcing agent are mixed in a molar ratio 1: 1 ratio. That is, a sodium hydroxide (NaOH) solution is added so that the weight ratio with the mixed liquid is 1: 0.3 to 1: 0.7 with respect to the total weight with the mixed liquid, and the reactor rotates at 300 RPM to 500 RPM at a temperature of 50 ° C to 80 ° C. Alkali calcium through reaction with calcium hydroxide (Ca (OH) 2) in concrete (C) which is stirred for about 30 minutes and penetrates deeply into the void (O) when applied or sprayed on concrete (C) and corroded by sodium hydroxide. Silicate to fill the voids (O) and aluminum alumina (Al2O3) is adsorbed on the alkali calcium silicate to improve the strength of the concrete (C) Penetration of waterproofing. Mixing liquid sodium silicate (or sodium silicate: Na 2 OSiO 2) serving as an adhesive and liquid aluminum silicate (Al 2 OSiO 4) serving as a coagulant or reinforcing agent in a molar ratio 1: 1 ratio;
Sodium hydroxide solution is added to the mixed solution so that the weight ratio of the mixed solution to the total weight of the mixed solution is 1: 0.3 to 1: 0.7, and is rotated at 300 RPM to 500 RPM at a temperature of 50 ℃ to 80 ℃ Stirring for about 30 minutes; And
And a step of filtering the stirred mixed solution and the resulting solution of sodium hydroxide solution through a membrane filter having a through hole of 1 μm to 3 μm.

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