KR102700612B1 - Liquid monomer anti-absorption agent for concrete surface coating and surface treating method for road concrete structure using thereof - Google Patents

Abstract

According to the invention, a liquid monomer anti-absorption agent for concrete surface application is provided, which comprises 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 5 to 8: 2 to 5; and an anti-absorption mixture in which 5 to 25 parts by weight of alkyltriethoxysilane, 0.5 to 15 parts by weight of nitrite, and 0.01 to 0.1 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture, wherein the penetrating mixture and the anti-absorption mixture are mixed in a volume ratio of 1:1 to 1:3 to produce a one-component type.

Description

Liquid monomer anti-absorption agent for concrete surface coating and surface treating method for road concrete structure using the same {Liquid monomer anti-absorption agent for concrete surface coating and surface treating method for road concrete structure using the same}

The present invention relates to a liquid monomer anti-absorption agent for concrete surface application, which prevents freezing, erosion and reinforcement corrosion of road concrete spheres such as medians and side ditches, and more specifically, to a method for surface treatment of road concrete spheres using the same, which forms a penetration/absorption prevention layer on road concrete spheres such as medians and side ditches using a penetrable mixture having excellent penetrability and an anti-absorption mixture having excellent anti-absorption, and provides a protective coating to prevent the concrete surface of medians and side ditches from being neutralized, deteriorated and carbonized, thereby shortening the lifespan of the concrete spheres due to freezing, erosion and reinforcement corrosion.

In general, the performance degradation due to the decrease in durability of road concrete structures such as median strips and side ditches requires considerable costs for repairs, reinforcement, and maintenance, and if a collapse occurs, the ripple effects will not only provide a factor that promotes anxiety about the country and those with knowledge beyond the economic and technical dimensions, but also lead to weakening competitiveness and loss of credibility in the international community.

Therefore, the recent domestic construction environment is changing from new investment to maintenance and repair/reinforcement for performance improvement of existing facilities, and interest in maintenance and life extension of facilities has been rapidly increasing in order to efficiently manage existing facilities and prevent duplicate investment of budget.

In addition, due to recent developments in construction technology, road concrete structures such as medians and side ditches are becoming larger and taller, and there is a growing tendency to value the appearance of road concrete structures, such as their function and harmony with the surrounding environment.

However, as shown in Fig. 1, the surface of concrete road surfaces, such as median strips and side ditches, can easily become contaminated by various external factors, resulting in damage or destruction of the exterior.

Therefore, damaged road concrete spheres must be properly repaired and reinforced according to their degree to restore their original function, and accordingly, development of repair and reinforcement methods and materials for road concrete spheres is actively underway.

Among the maintenance methods for road concrete spheres as described above, the most commonly used method is to paint the surface of road concrete spheres to ensure durability and watertightness against water leakage and cracking of large structures, and mainly, resin-based paints such as epoxy, urethane, and fluororesin, as well as organic paints, are widely used.

However, in the case of the resin type, since most of them are polymer series and have large molecular mass, they cannot penetrate deep into the concrete spheres for road use, and if the coating layer is removed due to surface lifting or impact, there is a problem that the concrete begins to deteriorate again.

In addition, in the case of organic systems, although they have excellent adhesion to road concrete, they have poor breathability and there is a problem that they gradually peel off from the surface over time due to shrinkage and expansion depending on temperature.

(Patent Document 0001) Registered Patent 10-1215403

(Patent Document 0002) Registered Patent 10-0192201

(Patent Document 0003) Registered Patent 10-0884015

(Patent Document 0004) Registered Patent 10-0949548

(Patent Document 0005) Registered Patent 10-1138829

Accordingly, the purpose of the present invention is to provide a liquid monomer anti-absorption agent for concrete surface application, which can rapidly penetrate deep into the surface of road concrete spheres such as median strips and side ditches by using a low molecular inorganic compound having a small molecular mass and small particle size as a penetrative mixture, and which can secure the absorption prevention property of water or chloride ions by considering the penetration depth and hardening time of the penetrative mixture, and can form a penetration/absorption prevention layer on the surface of road concrete spheres through an anti-absorption composition having a reactor or reaction time, and a surface treatment method of road concrete spheres using the same.

Meanwhile, the purpose of the present invention is not limited to the purpose mentioned above, and other purposes not mentioned can be clearly understood by those with ordinary skill in the art from the description below.

According to the invention, a liquid monomer anti-absorption agent for concrete surface application is provided, which comprises 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 5 to 8: 2 to 5; and an anti-absorption mixture in which 5 to 25 parts by weight of alkyltriethoxysilane, 0.5 to 15 parts by weight of nitrite, and 0.01 to 0.1 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture, wherein the penetrating mixture and the anti-absorption mixture are mixed in a volume ratio of 1:1 to 1:3 to produce a one-component type.

Here, lithium silicate preferably has a molar ratio of silicic acid and lithium of 1:2 to 1:4, potassium silicate preferably has a molar ratio of silicic acid and potassium of 1:4 to 1:6, and lithium silicate and potassium silicate preferably each have particles of 10 nm in size.

In addition, it is preferable that the liquid monomer absorption inhibitor for concrete surface application further contains 3 to 10 parts by weight of a catalyst or accelerator, carton, based on 100 parts by weight of the penetrative mixture.

Meanwhile, according to the present invention, a method for surface treatment of a road concrete sphere using a liquid monomer anti-absorption agent for concrete surface application is provided, which comprises a step of cleaning and treating the surface of a road concrete sphere; and a step of penetrating and coating the surface of a road concrete sphere with the above-mentioned liquid monomer anti-absorption agent for concrete surface application.

Therefore, according to the present invention, a low molecular inorganic compound having a small molecular mass and particle size is used as a penetrative mixture so as to rapidly penetrate deep into the concrete surface of a median strip and a side gutter, and an anti-absorption mixture having a reactor or reaction time so as to secure anti-absorption properties by considering the penetration depth and hardening time of the penetrative mixture can form a penetration/absorption prevention layer on the concrete surface of a median strip and a side gutter.

In addition, it is possible to prevent moisture or foreign substances from being absorbed on the concrete surface of the median strip and side gutter, thereby lowering the moisture content of the concrete, preventing neutralization or carbonation, and minimizing contamination, thereby increasing the lifespan of the median strip and side gutter.

Meanwhile, 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 with ordinary skill in the art from the description of the claims.

Figure 1 is a drawing showing the appearance of defects due to neutralization, deterioration, and carbonation of a median strip, which is one of the conventional road concrete spheres;
FIGS. 2 and 3 are drawings each showing a surface treatment method for a road concrete sphere using a liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

A liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention comprises a penetrative mixture in which lithium silicate and potassium silicate are mixed in a predetermined volume ratio, and an anti-absorption mixture to which alkyl triethoxysilane, nitrite, and chloride are added, and the penetrative mixture and the anti-absorption mixture are mixed.

More specifically, the liquid monomer anti-absorption agent for concrete surface application of the present invention comprises 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 5 to 8: 2 to 5, and an anti-absorption mixture in which 5 to 25 parts by weight of alkyltriethoxysilane, 0.5 to 15 parts by weight of nitrite, and 0.01 to 0.1 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture, and the penetrating mixture and the anti-absorption mixture are mixed in a volume ratio of 1:1 to 1:3 to produce a one-component type.

Lithium silicate, together with potassium silicate, is homogeneously dispersed in a state of rapid penetration deep into the concrete surface or pores of road concrete spheres such as median strips and side ditches, thereby improving the density, durability and waterproofness of the concrete, preventing neutralization or carbonation of the concrete surface and suppressing elastic deformation.

Here, lithium silicate has a molar ratio of silicic acid and lithium of 1:2 to 1:4. If the molar ratio is less than 1:2, silicic acid is not sufficiently added, so that the effect of improving the strength of the concrete is not sufficiently secured, resulting in reduced durability and waterproofing, and if the molar ratio exceeds 1:4, an overreaction occurs on the surface of the concrete, granules are generated, which hinders uniform penetration and causes deoxidation or formation of sediments, resulting in defects. Therefore, it is preferable to have the molar ratio as above.

Potassium silicate, together with lithium silicate, penetrates deeply and quickly into the concrete surface or pores of road concrete spheres such as medians and side ditches, thereby enhancing the strength and surface hardness of the concrete, preventing cracks and enhancing chemical resistance, thereby preventing neutralization or carbonation of the concrete surface and ensuring sufficient adhesion when coating the concrete surface with an anti-absorption mixture.

Here, potassium silicate has a molar ratio of silicic acid and potassium of 1:4 to 1:6. If the molar ratio is less than 1:4, potassium is applied excessively and the silicic acid cannot penetrate into the concrete, so that hardening takes a long time. If the molar ratio exceeds 1:6, the concrete is not sufficiently protected from moisture, durability is not improved, and defects are caused on the surface of the concrete. Therefore, it is preferable to have the molar ratio as above.

Meanwhile, lithium silicate and potassium silicate are used to produce a penetrative mixture that improves the strength and durability of concrete by forming bonds in the form of silicate lattice and calcium silicate through a silicate reaction, that is, chemical interaction between silicate and calcium hydroxide and other substances in concrete, when penetrating the concrete surface of road concrete spheres such as medians and side ditches. More preferably, it is preferable that the mixture has particles of 10 nm in size so that it naturally penetrates the concrete surface even at a room temperature of 20°C and reacts with calcium hydroxide and hardens to form a gel.

Additionally, lithium silicate and potassium silicate are mixed in volume ratios of 5:5, 6:4, 7:3, and 8:2.

Here, lithium silicate and potassium silicate are added in a volume ratio of lithium silicate of at least 1 to 4 times that of potassium silicate. However, if the volume ratio of lithium silicate is less than 1 (for example, if lithium silicate and potassium silicate have a volume ratio of 4:6), there is a problem that the permeability is not secured and the material does not penetrate deeply enough into the concrete surface or pores but rather is discharged to the outside from the concrete surface. If the volume ratio of lithium silicate exceeds 4 times (for example, if lithium silicate and potassium silicate have a volume ratio of 9:1), the permeability is too strong and the material penetrates deeper than the unique material rejection point of the concrete surface, making it difficult to accurately evaluate the structural stability of the concrete surface and durability, and since the amount of potassium silicate added is small and the amount of silicate ions is insufficient, the material does not harden at room temperature, requiring a separate heat-curing means to deteriorate workability. Therefore, it is preferable to have a limited volume ratio as described above.

Alkyltriethoxysilane is used to improve the adhesion, durability and waterproofing of the penetration/absorption prevention layer when manufactured as an anti-absorption mixture with nitrite and chloride and when penetrating or spraying it on the concrete surface or pores. More preferably, it is good to have particles of 20 nm in size so that the penetrating mixture can penetrate into the micro-pores of the concrete.

In addition, when alkyltriethoxysilane is manufactured as an anti-absorption mixture together with nitrite and chloride, the reaction period or reaction time of the anti-absorption mixture can be such that the penetrable mixture penetrates into the pores of the concrete surface to a predetermined depth and then hardens, while ensuring a penetration/absorption prevention layer of a predetermined thickness, thereby maintaining waterproofing.

Here, alkyltriethoxysilane is added in an amount of 5 to 25 parts by weight per 100 parts by weight of the penetrating mixture. If it is less than 5 parts by weight, it is difficult to form a penetration/absorption-preventing layer with a sufficient thickness on the surface of the concrete, and it does not react with alkaline substances inside the concrete, thereby reducing the neutralization or carbonation-preventing effect. If it exceeds 25 parts by weight, the pH value of the concrete increases, which has a negative effect on the formation of the penetration/absorption-preventing layer, and the penetrating mixture does not penetrate deeply into the pores of the concrete but is concentrated only on the surface. Therefore, it is desirable to have a limited weight part as described above.

When manufactured as an anti-absorption mixture with alkyltriethoxysilane and chloride, nitrite provides the function of promoting oxidation and reduction during a chemical reaction with calcium hydroxide after the penetrating mixture has penetrated into the pores of concrete, thereby promoting a chemical reaction between concrete and silicate penetrant through calcium ions, thereby forming calcium silicate on the concrete surface or in the pores.

Here, nitrite is added in an amount of 0.5 to 15 parts by weight per 100 parts by weight of the penetrative mixture. If it is less than 0.5 parts by weight, calcium and anions are insufficient, so that the silicate reaction does not occur smoothly. If it exceeds 15 parts by weight, a substance combined with calcium and anions precipitates in granule form or the reaction is concentrated on the concrete surface, so that the properties of the concrete change and the appearance deteriorates. Therefore, it is preferable to have a limited amount by weight as described above.

Chloride may be known to provide the function of promoting penetration of the penetrable mixture, inducing neutralization, and improving the adhesion and durability of the penetration/absorption-preventing layer when prepared as an anti-absorption mixture together with alkyltriethoxysilane and nitrite.

Here, chloride is added in an amount of 0.01 to 0.01 parts by weight per 100 parts by weight of the penetrative mixture. If it is less than 0.01 parts by weight, the silicate ions of the penetrative mixture cannot penetrate deeply into the pores of the concrete, so that the silicate reaction is reduced and the adhesion of the penetration/absorption prevention layer is reduced. If it exceeds 0.1 parts by weight, it interacts with the reinforcing bars in the concrete, causing corrosion and reducing the penetration and adhesion of the penetrative mixture. Therefore, it is preferable to have the weight parts as above.

Meanwhile, in the present invention, it is preferable that the liquid monomer anti-absorption agent for concrete surface application contains 3 to 10 parts by weight of CaCl2·2H2O, which is a catalyst or accelerator that enables penetration and water or chloride ion absorption prevention when forming a penetration/absorption prevention layer through a penetrable mixture and an anti-absorption mixture, so that the chemical reaction between the concrete and the silicate penetrating material is promoted through calcium ions, thereby forming calcium silicate on the concrete surface or in pores.

Here, the carton is added in an amount of 3 to 10 parts by weight per 100 parts by weight of the penetrating mixture. If it is less than 3 parts by weight, the amount of calcium chloride is insufficient, so that the silicate reaction does not occur smoothly, the gelation of the penetrating mixture at room temperature (20°C) becomes difficult, and the moisture removal function and freezing point depression function are not sufficiently exerted. If it exceeds 10 parts by weight, the calcium chloride precipitates in the form of granules or the reaction is concentrated on the surface of the concrete, so that the properties of the concrete change and the appearance deteriorates. Therefore, it is preferable to have a limited weight part as described above.

Meanwhile, in the present invention, the penetrable mixture and the anti-absorbent mixture are mixed in a volume ratio of 1:1 to 1:3 to manufacture a one-component type. However, if the volume ratio of the anti-absorbent mixture is less than 1 with respect to the volume ratio of the penetrable mixture, the neutralization or carbonation prevention properties of the concrete surface are not sufficiently secured, so that the durability of the concrete is not improved. In addition, if the volume ratio of the anti-absorbent mixture exceeds 3 with respect to the volume ratio of the penetrable mixture, a large amount of a composition such as chloride is added, so that the inside of the concrete is easily neutralized, and thus an abnormal chemical reaction may occur. Therefore, it is preferable to have a limited volume ratio as described above.

Hereinafter, the effect of a liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention will be described through specific examples.

A liquid monomer anti-absorption agent for concrete surface application in a one-component type is manufactured by including 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 5:5, and an anti-absorption mixture in which 3 parts by weight of alkyltriethoxysilane, 0.1 parts by weight of nitrite, and 0.009 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture, and the penetrating mixture and the anti-absorption mixture are mixed in a volume ratio of 1:0.8.

A liquid monomer anti-absorption agent for concrete surface application in a one-component type is manufactured by mixing 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 7:3, and an anti-absorption mixture in which 12 parts by weight of alkyltriethoxysilane, 6 parts by weight of nitrite, and 0.03 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture.

A liquid monomer anti-absorption agent for concrete surface application in a one-component type is manufactured by mixing 100 parts by weight of a penetrating mixture in which lithium silicate and potassium silicate are mixed in a volume ratio of 8:2, and an anti-absorption mixture in which 30 parts by weight of alkyltriethoxysilane, 25 parts by weight of nitrite, and 0.3 parts by weight of chloride are mixed based on 100 parts by weight of the penetrating mixture, and the penetrating mixture and the anti-absorption mixture are mixed in a volume ratio of 1:3.2.

Meanwhile, in order to evaluate the performance of the liquid monomer anti-absorption agent for concrete surface application of each of the above examples, test pieces were manufactured as described above, and then, using Company A's anti-absorption agent as a comparative example, the freeze-thaw resistance through KSF 2456, the surface peeling resistance through ASTC 672, the chloride ion penetration resistance through KSF 2711, and the curing time at room temperature and the water absorption resistance (water absorption amount after 5 hours of submerging the concrete sphere coated with the examples and comparative examples in water) were evaluated. The results are shown in Table 1 below.

Therefore, it can be seen that the liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention has excellent neutralization and carbonation prevention effects through excellent freeze-thaw resistance, surface peeling resistance, chloride ion penetration resistance, room temperature curing property, and water absorption resistance compared to conventional anti-absorption agents, as shown in Table 1 above.

In addition, in order to evaluate the performance of the liquid monomer absorption inhibitor for concrete surface application of Example 2 among each of the above examples, test pieces were prepared as described above, and then, using a known epoxy/acrylic coating as a comparative example, penetration depth, UV protection, service life, chloride ion reduction and moisture absorption rate reduction effects, water vapor transmission rate, crack prevention, and deicing salt corrosion prevention, etc. were evaluated, and the results are shown in Table 2 below.

Therefore, it can be seen that the liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention provides excellent penetration depth, UV protection, chloride ion reduction and moisture absorption rate reduction, water vapor transmission rate, crack prevention, and deicing salt corrosion prevention effects compared to conventional epoxy/acrylic coating agents, as shown in Table 2 above.

Meanwhile, a method for surface treatment of a road concrete sphere using a liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention is as follows.

First, as shown in FIGS. 2 and 3, the concrete surface of a road concrete sphere, such as a median strip and a side gutter, on which a liquid monomer absorption inhibitor for concrete surface application is to be applied is cleaned and treated.

Here, in the case where the road concrete sphere of the present invention is a median strip (10), if there is an installation such as a glare net on the top of the existing median strip (1), the second step is to remove it, the third step is to install a central support anchor that is vertically erected at a certain interval in the center of the top surface of the existing median strip (1) and protrudes upward, and the third step is to install a tipping-prevention anchor that is vertically erected at a certain interval and protrudes upward on the outer side of the bottom of the existing median strip (1), and the fourth step is to form the improved median strip (10) by arranging reinforcing bars or wire mesh on one or both sides of the existing median strip (1) by connecting the central support anchor and the tipping-prevention anchor, thereby casting concrete, and the median strip (10) is formed, and prior to the second step, the existing median strip (1) is measured and, based on the measurements, a wood-plastic composite (WPC) or steel fiber (Steel) is applied to cement mortar. It is preferable that the improvement be constructed by a method for improving a central divider (10), which comprises the following steps: 1) pre-fabricates in a factory a non-dispersive formwork for an improved central divider (10) by selectively using one of those made by adding fiber; 5) after the 4th step, washes the exterior of the existing central divider (1) or the area around the anti-fall anchor to remove foreign substances; 6) sprays or applies a new and old concrete adhesive to the exterior of the existing central divider (1) or the area around the anti-fall anchor; 7) fixes and installs the pre-fabricated non-dispersive formwork on the exterior of the existing central divider (1); and 8) pours concrete into the non-dispersive formwork and compacts it to allow it to cure.

Thereafter, a liquid monomer anti-absorption agent for concrete surface application corresponding to the above examples is manufactured.

Thereafter, a liquid monomer anti-absorption agent for concrete surface application is applied or sprayed on the concrete surface of a road concrete sphere such as the surface-treated median strip (10) by means of an application or spraying means, or is hardened after penetrating into the micro-pores, thereby completing the construction of a penetration/absorption prevention layer (20) on the concrete surface.

In addition, when a hole is drilled to install a structure such as a glaring net on a central divider (10), a liquid monomer anti-absorption agent for concrete surface application is applied or sprayed toward the inside of the hole (2) by a coating or spraying means, or is hardened after penetrating into the micro-pores, thereby completing the construction of a penetration/absorption prevention layer (20) on the concrete surface.

Here, the above-mentioned liquid monomer absorption inhibitor for concrete surface application is applied twice at 200 to 300 ml per unit area (m^2) of concrete of road concrete spheres such as median strips and side ditches through a low-pressure (75 kPa) automatic spray device. At this time, it is preferable that the working temperature be 20℃ and the relative humidity be 55%, and then the application be applied once more after curing for 7 hours.

Meanwhile, in order to measure the neutralization or carbonation prevention performance of road concrete spheres such as median strips and side ditches, in which a penetration/absorption prevention layer was formed by a liquid monomer anti-absorption agent for concrete surface application corresponding to Example 2 as described above, various items were measured, and the results are shown in Table 3 in comparison with the standard values.

Therefore, it can be seen that the surface treatment method of road concrete spheres such as median strips and side ditches using a liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention has better performance than the standard values in terms of items such as penetration depth, water absorption resistance, water permeability resistance, chloride ion penetration resistance, and flash point, as shown in Table 3 above.

Meanwhile, in order to measure the neutralization or carbonation prevention performance of road concrete spheres formed with a penetration/absorption prevention layer by a liquid monomer anti-absorption agent for concrete surface application corresponding to Example 2 as described above, items such as the absorption rate before and after coating the penetration/absorption prevention layer and the compressive strength after an immersion test were measured, and the results are shown in Table 4.

Therefore, it can be seen that the surface treatment method of a road concrete sphere using a liquid monomer anti-absorption agent for concrete surface application according to a preferred embodiment of the present invention has superior performance in terms of compressive strength and absorption rate after an immersion test after coating than before coating, as shown in Table 4 above.

Therefore, according to the present invention, a low molecular inorganic compound having a small molecular mass and particle size is used as a penetrative mixture so as to penetrate deeply and quickly into the concrete surface of a median strip, a side gutter, etc., and an anti-absorption mixture having a reactor or reaction time so as to secure anti-absorption properties by considering the penetration depth and hardening time of the penetrative mixture can form a penetration/absorption prevention layer on the concrete surface of a median strip, a side gutter, etc., and through this, the concrete surface of a median strip, a side gutter, etc. can be prevented from being neutralized, deteriorated, and carbonated, thereby preventing the lifespan of the concrete surface of the median strip, a side gutter, etc. from being shortened by freezing, erosion, and corrosion of reinforcing steel.

Although the preferred embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms because various substitutions, modifications, and changes can be made without departing from the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims (4)

100 parts by weight of a penetrative mixture comprising lithium silicate and potassium silicate in a volume ratio of 5 to 8: 2 to 5;
Based on 100 parts by weight of penetrating mixture,
Contains an anti-absorption mixture containing 5 to 25 parts by weight of alkyltriethoxysilane, 0.5 to 15 parts by weight of nitrite, and 0.01 to 0.1 parts by weight of chloride.
A liquid monomer anti-absorption agent for concrete surface application, characterized in that it is manufactured as a single-component type by mixing a penetrative mixture and an anti-absorption mixture in a volume ratio of 1:1 to 1:3. In the first paragraph,
Lithium silicate has a molar ratio of silicate and lithium of 1:2 to 1:4.
Potassium silicate has a molar ratio of silicic acid and potassium of 1:4 to 1:6.
A liquid monomer anti-absorption agent for concrete surface application, characterized in that lithium silicate and potassium silicate each have particles of 10 nm in size. In the first paragraph,
Based on 100 parts by weight of penetrating mixture,
A liquid monomer absorption inhibitor for concrete surface application, characterized in that it further contains 3 to 10 parts by weight of carton (CaCl2·2H2O), which is a catalyst or accelerator. A step in which the surface of a concrete sphere for a road is cleaned and treated;
A method for surface treatment of a road concrete sphere using a liquid monomer anti-absorption agent for concrete surface application, characterized in that it comprises a step of penetrating and coating the concrete surface of a road concrete sphere, the liquid monomer anti-absorption agent for concrete surface application according to any one of claims 1 to 3.