KR101586416B1 - Latex Modified Concrete Composition with Self-Healing Development Properties and Pavement Method Using the Same - Google Patents

Abstract

The present invention relates to a high performance latex modified concrete composition and a road pavement method using the same, wherein the high performance latex modified concrete composition applies a modified silicon cross-linked bond type latex resin to a latex modified concrete composition in order to improve permeation resistance of chloride ions and bonding performance in comparison with an existing latex modified concrete applied with a general latex resin, and thus obtain self-healing properties. In the present invention, provided is the high performance latex modified concrete composition. In latex modified concrete (LMC) in which a latex resin is mixed into cement concrete, the latex resin is a silicon latex resin containing an inorganic reaction group (CxHyOz, CaHCb) which is an end group of silane by making the latex resin mixed with a silane coupling agent. The cement concrete vitally contains a water-soluble inorganic gelation agent, alkali sulphate, sodium aluminate, and water-soluble silica. The cement concrete also contains and is mixed with self-healing admixture composed to selectively include a fluorinated retarder. A binding agent for the cement concrete vitally contains Portland cement, CSA, gypsum hemihydrate, and lithium carbonate and is used as an ultrarapid hardening binding agent selectively containing silica fume, citric acid, and a high-range water-reducing agent.

Description

TECHNICAL FIELD [0001] The present invention relates to a high-performance latex modified concrete composition having self-healing properties and a road paving method using the latex modified concrete composition.

The present invention relates to a LMC latex modified concrete excellent in chloride ion penetration resistance and a road paving method using the LMC latex modified concrete. More particularly, the present invention relates to a latex- The present invention relates to a high performance latex modified concrete composition which is improved in chloride ion penetration resistance and adhesion performance and has a self-healing property, as compared with existing latex modified concrete to which resin is applied, and a road paving method using the same.

On the surface of the road, the pavement is constructed so that vehicles can pass smoothly. In particular, roads can not be partially or fully accessible during the pavement construction period, so that the economic burden and loss due to traffic control can occur, so that the pavement construction needs to be carried out quickly and smoothly. As a result, road pavement materials are required to have high initial strength performance, long-term durability, protection of bridge slabs by preventing penetration of moisture or salt, and excellent physical performance for minimizing maintenance. In addition, waterproofing performance for preventing corrosion of road-bottomed concrete and reinforcing bars and preventing durability degradation, high bending tensile strength performance for crack resistance, and excellent adhesion performance with roadbed concrete (RC slab for bridges) .

On the other hand, the causes of damages of existing road pavement are as follows: plastic deformation and impact due to heavy vehicle traffic, freezing and thawing due to moisture penetration due to lowering of the winter temperature, chloride ion Deterioration of road-floor concrete due to penetration of water absorption on the pavement surface due to insufficient penetration and waterproof performance, and deterioration of adhesion of road pavement on the heat screen. Therefore, as a road pavement technology, a technique having work performance and physical characteristics similar to those of existing pavement concrete is required. In particular, as a pavement pavement technology for packing the surface of a bridge, And it is required to have a technique to improve durability through prevention of occurrence of micro cracks after cemented concrete pavement construction and improvement of curing performance.

As a road packaging material, asphalt concrete is representative. However, asphalt concrete has the advantage of low construction cost, but it has a disadvantage that it can be applied only to the part where the damage of the road floor concrete is not severe because the waterproof performance is insufficient and the protection property of the road floor concrete is low. Recently, concrete has been used to improve physical properties such as water tightness through the use of micro cement, silica fume, and ultra rapid cement. However, it has not satisfied the complex performance requirement. Latex Modified Concrete (LMC) mixed with latex resin is used to improve chloride ion penetration resistance. Latex modified concrete is expensive due to increase of raw material cost due to latex resin and sticky due to characteristics of latex resin. Therefore, There is a problem that workability is lowered and coagulation is shortened when applied.

[Table 1] shows the comparative analysis of new construction technology related to existing road pavement technology. In general, it is difficult to secure working time when initial strength is manifested, or the adhesion performance with existing concrete floor of bridge is decreased, There is a disadvantage that peeling phenomenon appears.

Road construction method designated as new construction technology in Korea HPC (High Performance Concrete) method
(Construction New Technology No. 495) VES-LMC (Very Early Strength-Latex Modified Concrete) Method
(Construction New Technology 427) LMC (Latex Modified Concrete) method
(Construction New Technology 320) Configuration Plain concrete
Fly ash
Slag
Silica fume
Hydrophilic PVA fiber Awen-type fast-speed concrete
Latex resin Plain concrete
Latex resin Constituent material characteristic Improved drying shrinkage resistance by using hydrophilic PVA fiber - Securing early strength development with quick-speed concrete
- Improvement of watertightness and watertightness through formation of film after formation of cement particle hydrate by using latex resin
- Reduction of material segregation by application of latex resin - Improvement of watertightness and watertightness through formation of film after formation of cement particle hydrate by using latex resin
- Reduction of material segregation by application of latex resin durability Freezing and thawing, adhesion improvement Freezing and thawing, adhesion improvement
Reduction effect of plastic shrinkage crack Shortening traffic opening time by securing early strength
Excellent surface peel resistance Disadvantages Due to hydrophilicity, penetration characteristics of chloride ion are high, so inner corrosion of steel is easy. - It is difficult to secure sufficient working time by using cement at the first speed
- Durability limit due to deterioration of adhesion between inorganic concrete surface and latex resin (organic) - Low initial strength performance than latex unused concrete due to latex resin
- Degradation of adhesion between inorganic concrete surface and latex resin Economics About 30 ~ 40% of LMC material cost Material cost burden due to the use of latex as well as quick-curing cement Waterproof and early strength can be secured by using latex resin, but lack of product competitiveness due to poor adhesion performance

In particular, VES-LMC method is a method of applying ultra fast speed concrete and latex resin in a mixed way. However, waterproof performance is improved than that of ordinary concrete. However, there is a problem that work speed is slow due to shortening of drying speed of latex and latex. There is a limit to the durability due to low adhesion to concrete. In the above-mentioned prior art method, chloride ion penetrates due to moisture absorption at the time of failure of the repair surface, and a problem is caused by corrosion of the steel, and an alternative to such breakage is further required.

The present invention has been developed to improve the disadvantages of conventional latex modified concrete, and it is intended to provide a high performance latex modified concrete capable of significantly increasing the adhesion performance between existing roadside concrete surfaces and road pavement surfaces and enhancing chloride ion penetration resistance. .

It is another object of the present invention to provide a high performance latex modified concrete which can exhibit self-healing properties on the road surface to enhance the recovery performance against penetration of water / chloride ions and damaged areas.

Further, the present invention provides a road paving method using a high-performance latex modified concrete.

In order to solve the above-described technical problem, the present invention provides a method for producing a latex-modified concrete (LMC) in which a latex resin is mixed with a latex resin in a cement concrete, wherein the latex resin is mixed with a latex resin, CxHyOz, CaHCb), and water-soluble inorganic-based gel fire to cement concrete; Alkali sulfates; Sodium aluminate; The present invention provides a high performance latex modified concrete composition characterized by further incorporating a self-healing admixture comprising a water-soluble silica and optionally a fluorinated retarder. Here, the silicone-based latex resin is prepared by adding and stirring a silane coupling agent in an amount of 1 to 10 wt% based on the latex resin solution and a silicone resin solution in which ethanol is mixed in a ratio of 1: 1.5 to 3 by weight, to a latex resin solution having a solid content of 40 to 50 wt% . Also, the binder in cement concrete is portland cement; CSA; Half gypsum; Silica fume essentially containing lithium carbonate; Citric acid; It is preferable to use it as a super fast cement binder optionally containing a fluidizing agent.

Further, the present invention provides a road paving method characterized in that the above-mentioned high-performance latex modified concrete composition is installed on the surface of a road and treated uniformly.

According to the present invention, the following effects can be expected.

First, the present invention can be applied to a latex-modified concrete for pavement use by applying a silicone latex resin prepared by mixing and reacting a silicone resin in place of a conventional latex resin to form an inorganic component Since the silicon (-Si) forms an intermediate bond structure, adhesion performance of the cross-linked packaging surface can be greatly increased.

Second, the present invention preferably incorporates a self-healing admixture in a latex-modified concrete for road-paving purposes, so that when micropracks are generated on the road surface, it is possible to prevent moisture penetration and ensure physical performance, Durability is improved due to improved recovery performance against chloride ion penetration and breakage.

Third, since the high-performance latex modified concrete according to the present invention is preferably used as a quick-setting binder, it can be advantageously applied to a road pavement maintenance method in which a curing time is short and rapid construction progress is required.

Figs. 1 and 2 are a permeability test body and a permeability testing apparatus for confirming the self-healing property in the test example of the present invention.
Fig. 3 is a graph showing the results of self-healing characteristics determined in the test example of the present invention.

The present invention relates to a latex modified concrete composition for road pavement. In the latex modified concrete (LMC) mixed with a latex resin in cement concrete, an inorganic reactor (CxHyOz, CaHb And a self-healing admixture is applied together with the silicone-based latex resin.

The silicon-based latex resin has an inorganic reactor (CxHyOz, CaHb), which is an end group of the silane, by reacting a general latex resin with a silane coupling agent such as the following bonding formula. The inorganic reactor (CxHyOz, CaHb) And SiC ₃ H ₆ NHnCα, which is the center of the silane structure, is excellent in bonding properties to latex resin, so that the silicone latex resin contributes to enhancement of adhesion with the bottom concrete surface of the bridge.

[Silane coupling agent bonding structure]

Where x = 1, 2; y = 3,5; z = 0, 1; n = 1, 2, 6; α = 0, 1, 2; a = 0, 1, 4, 6; b = 0, 2, 3, 6, 9

The silane coupling agent in the silicone-based latex resin is characterized by having an amino group (-NH2) group and having a functional group such as ethanol (C2H5O) or methanol (CH3O) group, preferably a refractive index of 1.43, a specific gravity of 0.94, It is preferable to use N-2 (aminoethyl) 3-Aminopropyltriethoxysilane having 97%. The silicone-based latex resin is prepared by adding 1 to 10% by weight of a silane coupling agent to a latex resin solution to a latex resin solution having a solid content of 40 to 50% by weight and a silicone resin solution mixed with ethanol at a ratio of 1: 1.5-3 by weight do. The time required for the addition is preferably ((silicone resin + ethanol) weight * 0.4) seconds. The silane coupling agent is suitably 1 to 10% by weight based on the weight of the latex resin solution (solid content 47%). If it is less than 1%, the adhesion property of the latex resin solution and the silane coupling agent is insufficient, Partial solidification problems of the latex resin appear due to the rapid hydrolysis reaction between the water in the solution and the silane coupling agent. The silicone resin solution is added to the latex resin solution and stirred for 12 hours or longer to ensure the reaction stability of the prepared silicone latex resin. After agitation maintenance, it is heated to 30 ~ 35 ℃ by heating with stirring, and ethanol is removed through vacuum to become a silicone latex resin applicable to final concrete.

Self-healing admixture creates self-healing microcrystalline particles when micro-cracks such as cracks occur on the construction surface, and mitigates the physical performance reduction of concrete surface and prevents penetration of water or chloride ions . The self-healing admixture may be suitably substituted with 20 to 40% by weight of the binder. When the amount is less than 20% by weight, the microcrystalline forming property is low and the charging characteristics are poor. When the amount is more than 40% by weight, the physical properties are deteriorated. The self-healing admixture may be a water-soluble inorganic-based gel fire caused by at least one of Al ₂ (SO ₄ ) ₃ and AlK (SO ₄ ) ₂ ; Alkali sulfate composed of at least one of CaSO ₄ , CaSO ₄ .2H ₂ O, and CaSO ₄ .1 / 2H ₂ O; Sodium aluminate having an Na ₂ O content of 35% by weight or more; Silica fume, water-soluble silica by at least one of the reactive silica powders; and a fluorinated retarder. In particular, the self-healing admixture comprises 20 to 50% by weight of a water-soluble inorganic gel-like fire; 15-30% by weight of alkali sulfate; 25 to 35% by weight of sodium aluminate; 5 to 20% by weight of water-soluble silica; And 0.5 to 5% by weight of a fluorine-based retarder.

In the self-healing admixture, the water-soluble mineral gel fire is a form of coagulant that forms ettringite through gelation water supply after curing. It is used in an amount of 20 to 50% by weight. If it is less than 20% by weight, the amount of ettringite produced is small When the amount is more than 50% by weight, physical performance deterioration is caused by excessive moisture. Alkali sulfate reacts with water to generate ettringite to form an explosive hydrate, thereby restoring cracks. It is used in an amount of 15 to 30% by weight. If less than 15% by weight, sufficient ettringite formation is not achieved. And the workability is deteriorated. Sodium aluminate dissolves in water to emit strong alkalinity, thereby promoting hydration reaction of cement and affecting the production and growth of self-healing substances. It is used in an amount of 25 to 35% by weight, and if it is less than 25% by weight, alkalinity The effect of promoting the hydration reaction is insufficient, and if it exceeds 35% by weight, the alkaline degree is increased and the quickness of the quickness is accelerated and the workability becomes insufficient. The water-soluble silica is used in an amount of from 5 to 20% by weight. When the amount is less than 5% by weight, the homogeneous dispersion property of the admixture is deteriorated. When the amount of the water-soluble silica is less than 20% If it exceeds, the physical performance deteriorates due to an excessive amount of mixing. The fluorine-based retarder is a material that controls the superalloy and the dispersion stability of the admixture by alkali ions, and is used in an amount of 0.1 to 5 wt%. When the amount is less than 0.1 wt%, the effect of controlling the superalloy speed is insufficient. It is difficult to secure initial strength.

Further, the present invention relates to a method for producing a latex-modified concrete, Calcium Sulfo-Aluminate (CSA); Half gypsum; Lithium carbonate; and silica fume; Citric acid; A fluidizing agent; ≪ RTI ID = 0.0 > 1, < / RTI > The quick-setting binder is intended to suitably utilize the high-performance latex modified concrete of the present invention for repairing road pavement through shortening the curing time. The ultra rapid binder comprises 25 to 65% by weight of portland cement; 25 to 40% by weight of CSA; 5 to 15% by weight of semi-gypsum; 0.1 to 5% by weight of lithium carbonate; 1 to 10% by weight of silica fume; 0.1 to 2% by weight citric acid; 0.5 to 5% by weight of a fluidizing agent;

Portland cement is used as a basic binder for securing concrete properties by hydration reaction. It is used as 25 ~ 65 wt% for physical performance and initial strength. CSA is used as a material for enhancing and securing initial strength through improvement of initial reactivity, and it is used in an amount of 25 to 40% by weight. When it is more than 40% by weight, it is difficult to perform a construction work due to swelling. The semi-gypsum is used as a material for securing the initial physical performance and quick clean characteristics, and it is used in an amount of 5 ~ 15 wt%. If it is less than 5 wt%, it is difficult to secure the characteristics. Lithium carbonate is a material for accelerating initial curing and securing initial strength, and is used in the range of 0.1 to 5 wt%. Silica fume is used for the development of long-term strength and the improvement of the confinement properties in concrete. If it is used in the range of 1 ~ 10 wt%, if it is less than 1 wt%, the strength is lowered due to lack of tightness of concrete. If it exceeds 10 wt% There is a fear of deterioration of the property. Citric acid is a material for ensuring workability through delayed initial curing due to the viscosity property of latex. It is used in an amount of 0.1 to 2% by weight. When the amount is less than 0.1% by weight, it is difficult to secure initial fluidity. When the amount is more than 2% by weight, There is a fear of deterioration. The naphthalene-based fluidizing agent is used as a material for improving the working performance through securing the fluidity. If the amount of the naphthalene-based fluidizing agent is less than 0.5 wt%, the initial fluidity is insufficient. If the amount is more than 5 wt% do.

The silicone latex resin, self-healing admixture and ultra fast curing binder as described above can be blended with aggregate, various additives, and water in the same manner as the conventional latex modified concrete, resulting in high performance latex modified concrete for road pavement. The high-performance latex modified concrete thus prepared is placed on the surface of the road to be treated uniformly, thereby realizing a road pavement method or road pavement repair method. Prior to laying, the substrate surface of the bridge floor concrete is evenly cleaned, and after the laying, the concrete is quickly planarized and cured.

Hereinafter, the present invention will be described in detail based on a test example. However, the following test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

[Test example] Concrete properties

1. Manufacture of silicone latex resin

5 g of N-2 (aminoethyl) 3-aminopropyltriethoxysilane was mixed with 10 g of ethanol (99.5%) to prepare a silicone resin solution. Then, a silicone resin solution was added to 100 g of a latex resin solution (solid content 47% . The time required for the addition was ((silicone resin + ethanol) weight * 0.4) seconds. The silicone resin solution was added to the latex resin solution, and the mixture was stirred for 12 hours or longer. Then, ethanol was removed by vacuum while heating and stirring at 30 to 35 ° C to prepare a final silicone latex resin.

2. Self-Healing Admixture Manufacturing

The self-healing admixture was prepared as shown in Table 2 below.

Self-healing admixture division Composition (% by weight) Remarks Water soluble mineral gel fire 38 A specific gravity of 1.69, a solubility of 8% or more (25 캜), Al2O3 18% Alkali sulfate 24 CaSO4 with a specific gravity of 2.96, a CO3 content of 55% and a CaO content of 40% Sodium aluminate 27 Al2O3nH2O (n = 1.3 to 1.8), and was composed of 35% of Na2O, 0.61 g / cm < 3 & Water-soluble silica 10.3 Silica fume with particle size less than 5micron, SiO2 93%, specific gravity 2.44 Fluoric retarder 0.7 A specific gravity of 2.5, a solubility of 93% (18 DEG C), 0.06% of K2CO3, 0.10% sub Total 100 -

3. Composition of fast-bonding binder

The fast velocity binder was prepared in the same composition as in Table 3 below.

Ultra fast binder division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 CSA Specific gravity 2.88, Specific surface area 2400 cm 2 / g, Al2O3 14.2%, CaO 53% 30 29 37 36.0 36.0 36.0 Portland
cement Powder figure 3,300 ~ 3,500㎠ / g 50 51 42 47.0 47.0 47.0 Half plaster A true specific gravity of 2.67, a powder of 1400 to 1800 cm 2 / g, a pH of 6 to 8 (20% concentration) 13 10 14 11.1 11.1 11.1 Silica fume A specific gravity of 2.23, a powder density of 210,000 cm2 / g, a unit weight of 260 kg / m3, a SiO2 of 90% 3 5 3 2.7 2.7 2.7 Lithium carbonate Specific gravity 2.1, solubility 1.3g / 100cc, pH 11.2 (1% solution), SO4 0.05% or less One 1.5 2.4 1.4 1.4 1.4 Citric acid Specific gravity 1.67, colorless transparent particles, mp 153 to 154 ° C One One 0.5 1.0 1.0 1.0 Naphthalene series
Fluidizing agent Light brown powder, 0.7g / cc in gibbsite, pH 8.4, SO2 concentration 2.3% 2 2.5 1.1 0.8 0.8 0.8 sub Total 100 100 100 100 100.0 100.0

4. Concrete formulation

The concrete was formulated as shown in Table 4 below using the silicone latex resin, self-healing admixture, and ultrahigh speed binder.

Concrete formulations division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 W / B (%) 37 39 40 38 37 37 S / a (%) 52 52 52 52 52 52 Mixed water (kg / m3) 95 91 91 133 91 91 Powder
(kg / m3) Ultra fast binder 296 263 246 360 360 360 Self-healing admixture 64 97 114 - - - sub Total 360 360 360 360 360 360 Silicone latex resin (kg / m3) 70 75 76 - 76 - General latex resin (kg / m3) - - - - - 76 Fine aggregate (kg / m3) 875 875 875 875 875 875 Coarse aggregate (kg / m3) 850 850 850 850 850 850

5. Concrete properties

Table 5 shows the results of the tests on the concrete according to the formulation of [Table 4], such as setting time, compressive strength, adhesion strength and chloride ion penetration resistance.

Concrete properties Characteristics Example 1 Example 2 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Condensation time (min) Fresh 25 24 23 24 25 21 closing 33 30 32 30 32 31 Structural characteristics Compressive strength
(MPa) 4 hours 28.7 31.4 31.9 23.2 27.7 28.1 1 day 36.7 39.3 38.0 31.5 32.2 33.0 28th 46.3 49.8 49.5 36.7 41.7 41.3 Bond strength (4 hours) (MPa) 2.97 2.91 2.72 1.1 2.85 1.74 Fit characteristic Dry shrinkage (7 days) (%) 0.016 0.012 0.013 0.08 0.021 0.029 Thermal Expansion Coefficient (7 days)
(* 10 < -6 > / DEG C) 7.2 6.8 8.0 6.1 7.1 6.4 Elastic modulus (* 10 ^ 4 MPa) 2.69 3.47 3.11 2.50 2.88 3.02 Endurance characteristics 0.50 Abrasion Resistance (7 days) (mm) 0.44 0.39 0.45 0.81 0.40 0.50 Chloride ion penetration resistance (28 days)
(Coulomb) 249 230 284 2887 591 650 Freeze-thaw resistance (28 days) (%) 86 84 86 82 83 83

The curing time was measured in accordance with KS L 5103. As a result of the measurement, it was confirmed that Comparative Examples 1 to 3, which did not use the self-healing admixture and the silicone latex resin, and the Examples 1 to 3 according to the present invention, had a similar setting time. Therefore, it can be said that the use of the self-healing admixture as well as the silicone latex resin does not significantly affect the working characteristics of the concrete.

The compressive strength was measured by the intensity of elapsed time (4 hours, 1 day, 28 days) while curing under the condition of molding (temperature 20 to 25 ° C, humidity 45 to 60%). As a result, In all of Examples 1 to 3, the improved compressive strength performance was confirmed. It is believed that the application of silicone latex resin and self - healing admixture resulted in the formation of microcrystallites by the self - healing admixture.

It is also seen that the characteristic values in Examples 1 to 3 are significantly improved as compared with Comparative Examples 1 to 3. It is believed that the silicone-based latex resin in Examples 1 to 3 improved adhesion through the inorganic bonding with the existing concrete floor.

It was confirmed that the drying shrinkage, the thermal expansion coefficient, and the elastic modulus of the conformable characteristics portion were equal to or more than those of Examples 1 to 3. It can be seen that this does not affect the deterioration of the compatibility characteristics when using the silicone-based latex resin and the self-healing admixture.

The abrasion resistance and freeze-thaw resistance in the durability properties were also confirmed to be equal to or better than those in Comparative Examples 1 to 3 in Examples 1 to 3. This is because the latex resin in the concrete was applied to the adhesion between the aggregate and the binder particles And thus the penetration of moisture from the outside is minimized. It was also confirmed that Examples 1 to 3 were superior to Comparative Examples in terms of chloride ion penetration resistance results. In addition, since the penetration of moisture in Examples 1 to 3 can be minimized, chloride ions present in water are also less likely to migrate into concrete .

6. Self-Healing Properties

The self-healing performance was evaluated by measuring the permeation amount and the daily water amount reduction after permeating the test piece made as shown in FIG. 1 to the permeation device as shown in FIG. In other words, after forming the circular concrete specimen (100mmX200m), standard curing was carried out. After 28 days, the specimen was ruptured with respect to the specimen and controlled to have a crack interval of 0.2-0.3 mm. (Water level: 12 cm, water pressure: 1.3 Kpa), but the water level was maintained at the beginning of the water test. The self-healing performance was evaluated by measuring the amount of water. The results are shown in [Table 6] and FIG. 3 below.

Self-Healing Properties Pitcher
lapse Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Permeation volume (ml / s) Permeability Permeation volume (ml / s) Permeability Permeation volume (ml / s) Permeability Permeation volume (ml / s) Permeability Permeation volume (ml / s) Permeability Permeation volume (ml / s) Permeability 0day 0.312 100.0% 0.291 100.0% 0.287 100.0% 0.378 100.0% 0.365 100.0% 0.414 100.0% 1day 0.167 53.5% 0.132 42.3% 0.118 37.8% 0.287 92.0% 0.284 91.0% 0.309 99.0% 3day 0.057 18.3% 0.046 14.7% 0.039 12.5% 0.237 76.0% 0.230 73.7% 0.274 87.8% 5day 0.043 13.8% 0.029 9.3% 0.026 8.3% 0.217 69.6% 0.227 72.8% 0.272 87.2% 7day 0.021 6.7% 0.012 3.8% 0.009 2.9% 0.207 66.3% 0.221 70.8% 0.234 75.0% 14day 0.013 4.2% 0.008 2.6% 0.007 2.2% 0.194 62.2% 0.216 69.2% 0.231 74.0%

As shown in [Table 6] and FIG. 3, in Comparative Examples 1 to 3 in which the self-healing admixture was not used, the permeability reduction rate was remarkably low, but in Examples 1 to 3 using the self-healing admixture it was confirmed that the permeability reduction rate was high. Accordingly, even when the self-healing admixture is applied together with the silicone latex resin, the self-healing property is exhibited to be excellent.

Claims (9)

delete In Latex Modified Concrete (LMC) mixed with latex resin in cement concrete,
The latex resin is a silicone-type latex resin having an inorganic reactor (CxHyOz, CaHb) which is an end group of silane by incorporating a silane coupling agent into a latex resin. The latex resin is mixed with a latex resin solution having a solid content of 40 to 50% A silicone resin solution mixed with 10 wt% of a silane coupling agent and ethanol in a weight ratio of 1: 1.5-3,
Wherein the cement concrete is a water soluble mineral based gel fire caused by at least one of Al ₂ (SO ₄ ) ₃ and AlK (SO ₄ ) ₂ ; Alkali sulfate composed of at least one of CaSO ₄ , CaSO ₄ .2H ₂ O, and CaSO ₄ .1 / 2H ₂ O; Sodium aluminate having an Na ₂ O content of 35% by weight or more; Wherein the self-healing admixture further comprises a water-soluble silica comprising at least one of silica fume, silica powder, and reactive silica powder. 3. The method of claim 2,
Characterized in that the self-healing admixture further comprises a fluorine-based retarder. 4. The method of claim 3,
Wherein the self-healing admixture comprises 20 to 50% by weight of water-soluble inorganic gel-like fire; 15-30% by weight of alkali sulfate; 25 to 35% by weight of sodium aluminate; 5 to 20% by weight of water-soluble silica; 0.5 to 5% by weight of a fluorine-based retarder. 5. The method according to any one of claims 2 to 4,
The cement concrete is a binder, a portland cement; Calcium Sulfo-Aluminate (CSA); Half gypsum; Wherein the ultra low velocity binder comprises a lithium carbonate and a lithium carbonate. The method of claim 5,
The ultra rapid binder may be selected from the group consisting of silica fume; Citric acid; A fluidizing agent; The latex modified concrete composition according to claim 1, The method of claim 6,
Wherein the ultra rapid binder comprises 25 to 65% by weight of a portland cement; 25 to 40% by weight of calcium sulfo-aluminate (CSA); 5 to 15% by weight of semi-gypsum; 0.1 to 5% by weight of lithium carbonate; 1 to 10% by weight of silica fume; 0.1 to 2% by weight citric acid; And 0.5 to 5% by weight of a fluidizing agent, based on the total weight of the latex modified concrete composition. A road pavement method, characterized in that a high-performance latex-modified concrete composition according to any one of claims 2 to 4 is laid on the surface of a road and treated uniformly. 9. The method of claim 8,
The high performance latex modified concrete composition may be used as a binder, a portland cement; Calcium Sulfo-Aluminate (CSA); Half gypsum; Lithium bicarbonate, and lithium bicarbonate.

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