KR100847375B1 - Composition of very-early strength penetrative hydrous polymer-modified paste using ultra-fine cement and road pavement using the same - Google Patents

Abstract

A rapid-hardening polymer-modified cement paste composition is provided to reduce a construction period, to enhance resistance against plastic deformation, to improve durability of asphalt, and to increase a service life of pavement. A rapid-hardening, penetrative polymer-modified cement paste composition includes an ultrafine rapid-hardening mixture cement, a lithium carbonate, and a polymer dispersion, wherein the mixture cement comprises 40-60wt% of ultrafine cement, 10-20wt% of ultrafine amorphous calcium aluminate, and 30-40wt% of ultrafine blast furnace slag powder. The mixture cement, lithium carbonate, and polymer dispersion are used in a weight ratio of 100:0.2-2.0:30-50. The polymer dispersion includes starch, polyacrylic acid-based absorptive polymer, and a mixture of acrylic resins comprising 70-90wt% of SBR latex and 10-30wt% of acrylic resin. The mixture of acrylic resins and the starch and polyacrylic acid-based absorptive polymer are contained in a weight amount of 100:1-3.

Description

Composition of very-early strength penetrative hydrous polymer-modified paste using ultra-fine cement and road pavement using the same}

1 is a process chart showing a process of paving a road using an absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement of the present invention.

The present invention relates to an absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement and a road paving method using the same. More particularly, the present invention relates to an absorbent polymer capable of shortening a construction period and improving resistance to plastic deformation and durability. Modified fast-curing polymer cement paste composition and a road pavement method using the same.

Generally, road pavement includes concrete pavement and asphalt pavement. Among them, the concrete paving method is a rigid paving method, which has a long construction and curing period, often generates cracks due to dry shrinkage, and has poor walking and running stability and comfort.

Due to various problems of the concrete paving method, asphalt paving method is used for most road paving.

Asphalt pavement is ductile and has a good ride comfort and low noise, so it is widely used. However, as heavy and medium sized vehicles pass, the pavement is damaged and the asphalt coating is easily peeled off due to the friction of the tires, wheel rutting and plastic deformation. Permanent deformation easily occurs, requiring frequent maintenance and shortening the lifespan, thereby increasing the maintenance cost of the road, causing problems in traffic communication.

In order to solve the problems of the asphalt paving method, the development of semi-rigid asphalt mixture that can improve the weakness of the asphalt is urgently required, and recently mixed with asphalt to give the asphalt semi-rigid characteristics Cement paste can be developed and used.

However, conventionally used cement pastes have different physical properties from asphalt, and thus, there is a problem in that bonding strength between the cement pastes is poor. Therefore, there is an urgent need for development of a cement paste to solve this problem.

In addition, the existing polymer dispersions used in the cement paste have high viscosity and low workability and fluidity, so that the injection performance is poor at the time of injection. Therefore, there is an urgent need to develop a polymer dispersion to solve this problem.

On the other hand, existing asphalt pavement has a problem of raising the air temperature due to radiant heat. Therefore, it is also urgent to develop a material to solve the problem of the rise of the atmospheric temperature by using a material having moisture retention and water retention to prevent the rise of radiant heat throughout the city. Therefore, in order to solve the problem of the increase in the atmospheric temperature, the present invention solves the problem of the increase in the atmospheric temperature by the release of water vapor, which is absorbed by the absorbent polymer added to the inside of the hardened super absorbent polymer cement cured body. I want to solve.

The present invention has been made to solve the above problems of the prior art, by shortening the construction period, increasing the resistance to plastic deformation, improve the durability of the asphalt, not only can increase the service life of the package An object of the present invention is to provide an absorbent polymer-modified fast-curing polymer cement paste composition using ultrafine cement and a road pavement method using the same, which reduce maintenance costs and lower atmospheric temperature rise.

In order to achieve the above object, the absorbent polymer modified fast-curing polymer cement paste composition using ultrafine cement according to the present invention is ultrafine cement 40 to 60% by weight, ultrafine amorphous calcium aluminate 10 to 20% by weight, ultrafine Ultrafine superhard mixed cement composed of blast furnace slag fine powder 30-40 wt%, lithium carbonate, polymer dispersion, and other additives (at least one of antifoaming agent, dispersing agent, leveling agent, shrink reducing agent and pigment) It is done by

In addition, the road paving method using an absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement according to the present invention in order to achieve the above object, the step of laying the asphalt mixture on the road, and absorbent using ultra-fine cement Injecting a polymer-modified fast-curing polymer cement paste composition into the asphalt-paved road, curing the pavement infused with the absorbent polymer-modified fast-hard polymer cement paste composition using the ultra-fine cement, and the ultra-fine cement It is composed of a surface finishing step of finishing the surface of the cement paste composition after curing of the absorbent polymer modified fast-curing polymer cement paste composition using.

Hereinafter, an absorbent polymer modified fast-curing polymer cement paste composition using ultrafine cement according to the present invention and a road pavement method using the same will be described in detail.

Absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement according to the present invention comprises an ultra-fine super fast-mixing cement, lithium carbonate, polymer dispersion and other additives.

The ultrafine cemented carbide mixed cement is made by mixing 40 to 60% by weight ultrafine cement, 10 to 20% by weight ultrafine amorphous calcium aluminate, and 30 to 40% by weight ultrafine blast furnace slag fine powder.

The ultra fine cement has a Blaine powder of 4,500-7,000 ㎠ / g and the fine powder of ordinary ordinary Portland cement is about 2,800-3,500 ㎠ / g. It is fast, which not only increases the initial strength of the cement but also the long-term strength of the hardened cement.

The ultra-fine amorphous calcium aluminate is an inorganic cemented carbide material obtained by grinding its Blaine powder to about 7,000-9,000 cm 2 / g to increase hydration reactivity. By producing ettringite hydrates, the compressive strength of a typical Portland cement obtained after several days or tens of days when mixed with cement can be achieved in hours.

The ultra-fine blast furnace slag powder is a latent hydrophobic inorganic powder having a Blaine powder level of about 7,000-10,000 cm 2 / g, which enhances the strength of the cement hardened material and densifies the hydrated structure of the cement hardened material, thereby improving chemical resistance and durability. At the same time, the viscosity of the superabsorbent polymer cement paste is reduced and the fluidity is enhanced to allow the superabsorbent polymer cement paste to be quickly and tightly filled between the porous asphalt voids.

The ultra fine cemented carbide mixed cement: lithium carbonate is mixed so that the weight ratio of lithium carbonate is 100: 0.2 to 2.0, the lithium carbonate serves as a catalyst to promote the calcium aluminate fine powder to start the first hydration ultrafine particles The cemented carbide compounding cement can develop strength early.

The polymer dispersion is to form a film in the cement paste cured body to improve the warpage, tensile and adhesion strength and improve the water retention to improve the durability, such as neutralization, chloride ion penetration, freeze-thawing, ultra-fine superhard mixed cement : Mix so that the weight ratio of polymer dispersion may be 100: 30-50.

The polymer dispersion is composed of a mixture of 70-90% by weight of SBR latex, acrylic resin consisting of 10-30% by weight of acrylic resin, and starch and polyacrylic acid-based absorbent polymers. The mixture of acrylic resin, starch, and polyacrylic acid-based water absorbent polymer has a weight ratio of 100: 1 to 3.

The absorbent polymer has a fast absorption rate, does not dissolve in water, and does not gel when absorbed by water. However, when only an absorbent polymer is used as a admixture when preparing a paste, the pot life is delayed, resulting in a construction period. It becomes longer, the compressive strength is lowered by about 50% than before, and the material cost is increased. In addition, the bleeding caused by the use of a large amount of polymer (Bleeding) the polymer rises to the surface, the surface is hardened, but the inside of the paste does not have a problem occurs. In the present invention, in order to compensate for these disadvantages, a small amount of absorbent polymer is added to the polymer dispersion and the W / C ratio can be effectively reduced to prevent bleeding and to exhibit much higher strength expression and durability improvement than existing paste compositions.

The other additive is composed of at least one of an antifoaming agent, a dispersant, a leveling agent, a shrinkage reducing agent, and a pigment.
The antifoaming agent is mixed in a weight ratio of 100: 1 to 4 with respect to the polymer dispersion, the dispersing agent is a weight ratio of 100: 0.5 to 3.0 with respect to the ultrafine cemented carbide mixing cement, and the smoothing agent is mixed with the ultrafine cemented carbide A weight ratio of 100: 0.5 to 1.0 with respect to cement, and the shrinkage reducing agent is a weight ratio of 100: 1 to 4 with respect to the ultrafine cemented carbide mixed cement, and the pigment is 100: 0.3 to 2.0 with respect to the ultrafine cemented carbide mixed cement. It is mixed by weight ratio.

The antifoaming agent is added to reduce the increase in the amount of air due to the generation of entrained air, any one or more selected from polyether, silicone, ethyl alcohol and ethylene glycol may be used, but is not limited thereto. A commonly used kind may be used.

The dispersing agent reduces the required unit quantity required to secure the consistency of cement paste, thereby reducing the surplus amount other than the amount required for cement hydration, thereby densifying the internal structure of the cement hardened body, thereby improving watertightness and freeze-thawing resistance. Improve and increase durability. It also adds viscosity and fluidity to the cement paste that is not hardened to facilitate penetration without minimal compaction or compaction into the porous asphalt mixture voids. Such a dispersant may be used alone or in combination of any one or more selected from polycarboxylic acid, naphthalene, melamine and lignin, but is not limited thereto, and a type commonly used in the art may be used.

The leveling agent is added to improve the self leveling (self-charging performance) of the paste, any one or more selected from polyoxide, urethane, and polycarboxylic acid may be used, but is not limited thereto. The kind used as may be used.

The shrinkage reducing agent is added to prevent dry shrinkage of the cement hardened body, and any one or more selected from polyether, ethylene glycol, and propylene glycol may be used, but is not limited thereto. Can be used.

The pigment is added to facilitate the identification on the road, a type commonly used in the art may be used, and when added in the above-described content, the pigment may be easily distinguished by vivid color and the durability of the color may be improved.

In addition, the road paving method using the absorbent polymer modified fast-curing polymer cement paste composition using the ultra-fine cement according to the present invention, the step of laying a common porous asphalt mixture used for asphalt pavement on the road as shown in FIG. S1) and the step of injecting the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement according to the present invention into the road on which the porous asphalt mixture is installed (S2), and the absorbent polymer modified fast-hardening using the ultrafine cement. Curing the package in which the polymer cement paste composition is injected (S3), and after curing the absorbent polymer-modified fast-curing polymer cement paste composition using the ultrafine cement, the surface of the cement paste composition is roughened by using equipment such as sandblasting. Surface finishing It consists of a step (S4).

On the other hand, the road paving method using the absorbent polymer modified fast-curing polymer cement paste composition using the ultra-fine cement according to the present invention, in addition to the above-described method, the following methods, that is, a general porous asphalt mixture used for asphalt paving is laid on the road Step (S1), and the step of injecting the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement according to the present invention on the road on which the porous asphalt mixture is installed (S2), and using the injected ultrafine cement Dispersing silica sand or the like on the surface of the absorbent polymer-modified fast-curing polymer cement paste composition (S3 ′), and curing the package into which the absorbent polymer-modified fast-curing polymer cement paste composition using the ultrafine cement is injected (S4 ′). It may be composed of).

Once the pavement is completed by the above process, open the traffic.

From now on, examples of the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement according to the present invention are described in more detail, and the present invention is not limited to the following examples. .

<Examples 1 to 3>

In Examples 1 to 3, 60% by weight of ultra fine cement (Brain powder degree 6,000 cm 2 / g), 10% by weight of ultra fine amorphous calcium aluminate (Blain powder degree 7,000 cm 2 / g), ultrafine blast furnace slag fine powder ( Bran powder was also mixed with 30% by weight of 8,000 cm 2 / g) to prepare a super fine cemented carbide mixing cement, and mixed with lithium carbonate. At this time, the ultrafine ultrafine cemented mixture and lithium carbonate are mixed so that the weight ratio is 100: 2.0.

And, 90% by weight of SBR latex and 10% by weight of acrylic resin (Example 1), 80% by weight of SBR latex and 20% by weight of acrylic resin (Example 2), 70% by weight of SBR latex and 30% by weight of acrylic resin (Example 3) are mixed to form a mixture of acrylic resin, and starch and polyacrylic acid-based absorbent polymer are mixed therein to prepare a polymer dispersion. At this time, the mixture of the acrylic resin, starch and the polyacrylic acid-based absorbent polymer so that the weight ratio is 100: 2.
The polymer dispersion thus constructed is added to the ultrafine cemented carbide mixing cement, wherein the ultrafine cemented carbide mixing cement and the polymer dispersion have a weight ratio of 100: 50.

On the other hand, the dispersant, the smoothing agent, the shrinkage reducing agent, and the pigment were respectively added in the weight ratio of 100: 2, 100: 1, 100: 3, 100: 1 for the ultra fine cemented carbide mixed cement, and 100: for the polymer dispersion. Antifoam was added at a weight ratio of 2.

<Examples 4 to 6>

In Examples 4 to 6, 50% by weight of ultra fine cement (by 6,000 cm 2 / g of fine powder), 15% by weight of ultra fine amorphous calcium aluminate (by 7,000 cm 2 / g of fine powder), ultrafine blast furnace slag fine powder ( Blaine powder was also mixed with 8,000 cm 2 / g) 35% by weight to prepare a super fine cemented carbide mixing cement, and mixed with lithium carbonate. At this time, the ultra-fine superhard mirror mixing cement and lithium carbonate are mixed so that the weight ratio is 100: 1.

And, 90% by weight of SBR latex and 10% by weight of acrylic resin (Example 4), 80% by weight of SBR latex and 20% by weight of acrylic resin (Example 5), 70% by weight of SBR latex and 30% by weight of acrylic resin (Example 6) are mixed to form a mixture of acrylic resin, and starch and polyacrylic acid-based absorbent polymer are mixed therein to prepare a polymer dispersion. At this time, the mixture of the acrylic resin, starch and the polyacrylic acid-based absorbent polymer so that the weight ratio is 100: 2.
The polymer dispersion thus constructed is added to the ultrafine cemented carbide mixed cement, wherein the ultrafine cemented carbide mixed cement and polymer dispersion have a weight ratio of 100: 40.

On the other hand, the dispersant, the smoothing agent, the shrinkage reducing agent and the pigment were added in the weight ratio of 100: 2, 100: 1, 100: 3, and 100: 1 for the ultrafine cemented carbide mixed cement, respectively. Antifoam was added at a weight ratio of 100: 2.

<Example 7 to Example 9>

In Examples 7 to 9, 40% by weight of ultra fine cement (Brain powder degree 6,000 cm 2 / g), 20% by weight of ultra fine amorphous calcium aluminate (Blain powder degree 7,000 cm 2 / g), ultrafine blast furnace slag fine powder ( Blaine powder was also mixed with 8,000 cm 2 / g) 40% by weight to prepare a super fine cemented carbide mixing cement, and mixed with lithium carbonate. At this time, the ultra-fine superhard diameter mixing cement and lithium carbonate are mixed so that the weight ratio is 100: 0.2.

And, 90% by weight of SBR latex and 10% by weight of acrylic resin (Example 7), 80% by weight of SBR latex and 20% by weight of acrylic resin (Example 8), 70% by weight of SBR latex and 30% by weight of acrylic resin (Example 9) are mixed to form a mixture of acrylic resins, and starch and polyacrylic acid-based absorbent polymers are mixed thereto to prepare a polymer dispersion. At this time, the mixture of the acrylic resin, starch and the polyacrylic acid-based absorbent polymer so that the weight ratio is 100: 2.
The polymer dispersion thus constructed is added to the ultrafine cemented carbide mixing cement, wherein the ultrafine cemented carbide mixing cement and the polymer dispersion have a weight ratio of 100: 30.

On the other hand, the dispersant, the smoothing agent, the shrinkage reducing agent and the pigment were added in the weight ratio of 100: 2, 100: 1, 100: 3, and 100: 1 for the ultrafine cemented carbide mixed cement, respectively. Antifoam was added at a weight ratio of 100: 2.

The following presents comparative examples that can be compared with the embodiments of the present invention to more easily understand the characteristics of the above embodiments.

Comparative Example 1

In Comparative Example 1, a cement paste composition was prepared by mixing 90% by weight of one type of ordinary portland cement (blow powder degree of 3,200 cm &lt; 2 &gt; At this time, the weight ratio of the cement paste composition, the high fluidizing agent, and the pigment was 100: 2: 1.

Comparative Example 2

In Comparative Example 2, a cement paste composition was prepared by mixing 90% by weight of one kind of ordinary Portland cement (Blain powder degree 3,200 cm 2 / g) and 10% by weight of silica sand, and a pigment was added thereto. At this time, the weight ratio of the cement paste composition and the pigment was set to 100: 1.

<Comparative Example 3 to Comparative Example 4>

In Comparative Examples 3 to 4, 50% by weight of ultrafine cement, 17% by weight of amorphous calcium aluminate (5,500 cm 2 / g of a grain powder), 33% by weight of blast furnace slag fine powder (4,500 cm 2 / g of a powder) were mixed. Ultrafine cemented carbide mixed cement was prepared.

Meanwhile, sodium gluconate and lithium carbonate were added to the ultrafine cemented carbide mixed cement, wherein the weight ratio of the ultrafine cemented carbide mixed cement to sodium gluconate and lithium carbonate was 100: 0.2: 0.2.

Then, a polymer dispersion was prepared by using 100% by weight of SBR latex or acrylic resin (Comparative Examples 3 and 4), and a superhard polymer cement paste composition was prepared by adding the polymer dispersion. At this time, the ultra-fine superhard diameter mixed cement and the polymer dispersion had a weight ratio of 100: 50.

On the other hand, dispersing agent, leveling agent, shrinkage reducing agent and pigment were added in the weight ratio of 100: 2, 100: 1, 100: 3, 100: 1 for the ultrafine cemented carbide mixed cement, and 100: Antifoam was added at a weight ratio of 2.

Test Example 1 Preparation of Test Specimen

Each of the compositions prepared in Examples 1 to 9 and Comparative Examples 1 and 2 were subjected to dimensions Ø 7.5 × 15 cm (for compressive strength and tensile strength test), 6 × 6 × 24 cm (for bending strength test), 4 × 4 × 1 cm (adhesion) Strength test), 4 × 4 × 16 cm (for dry shrinkage test, workability slump-flow test, chloride ion penetration depth test, and water absorption test).

In addition, the specimens were prepared by injecting each of the compositions prepared after spraying silica sand to test the anti-slip resistance.

As a curing method, 4 hours and 3 days of drying [20 ° C, 50% (RH)] curing and 2 days of wet [20 ° C, 80% (RH)] + 5 days of water [20 ° C] + 21 days of drying [20 ° C, 50% (RH)] was cured to prepare test specimens.

Test Example 2 Strength Test

In order to compare the physical properties of the composition prepared according to the present invention and the composition prepared in Comparative Example, the compressive strength of each specimen prepared in Test Example 1 by KS F 2477 (Strength Test Method of Polymer Cement Mortar) And the flexural strength test was performed, the results are shown in Table-1 below.

In addition, the tensile strength test was performed according to KS L 5104 (Test Method for Tensile Strength of Cement Mortar), and the adhesive strength of the specimen was measured by JIS A 6916 (Wall coatings for thick textured finishes). Each result is shown in Table 1 below.

TABLE-1

As shown in Table 1, the compositions prepared in the present invention (Examples 1 to 9) have a compressive strength of 210-237kgf / cm 2 at 4 hours of age, and the compositions prepared in Comparative Examples 1 and 2 Since hardening did not occur at 4 hours of age, the compressive strength value was very fast compared to that of 0kgf / ㎠, and the compressive strength value was high even when compared to the cemented carbide mixed cement material.

In addition, the flexural strength, tensile strength, and adhesive strength of the composition prepared in the present invention also showed ultra-high hardness properties at 4 hours compared to the composition of the comparative example, and showed high strength values even when compared to the cemented carbide mixed cement material using general fine powder. .

That is, it was confirmed that the composition prepared in the present invention exhibited superior superhard diameter performance compared to the compositions prepared in Comparative Examples 1 to 4.

In addition, as shown in Table 1, the composition prepared in the present invention (Examples 1 to 9) is the compressive strength, bending strength, tensile strength, adhesive strength of the comparative examples 1 to 4 even at 3 days and 28 days of age It showed excellent physical properties compared to the composition.

Test Example 3 Drying Shrinkage Rate Measurement

In the specimen preparation process as in Test Example 1, the length of the specimen after the wet curing was measured, and again subjected to dry curing [20 ℃, 50% (RH)] to KS F 2424 (test method of concrete length change) The dry shrinkage was measured, and the results are shown in Table 2 below.

TABLE-2

As shown in Table 2, the composition prepared in the present invention (Examples 1 to 9) is significantly reduced in the dry shrinkage compared to the composition prepared in Comparative Examples 1 to 4, reducing the shrinkage and crack prevention effect It was confirmed that there is.

Test Example 4 Slump-flow Measurement

In order to compare the workability of the composition prepared according to the present invention and the composition prepared in Comparative Example, the slump-flow value was measured for the specimen prepared in Test Example 1, and the results are shown in Table-3 below. It was.

TABLE-3

As shown in Table-3, the composition prepared in the present invention (Examples 1 to 9) had a higher slump-flow value without the occurrence of bleeding compared to the composition prepared in the comparative example. The slump-flow value is used to measure the workability of high flow mortar and concrete. High slump-flow value means excellent workability.

That is, the composition prepared in the present invention (Examples 1 to 9) enhances workability by effectively filling the pores of the porous asphalt mixture compared to the compositions prepared in Comparative Examples 1 to 4, resulting in the It was confirmed that the disadvantages of plastic deformation and strength characteristics and durability could be improved.

Test Example 5 Chloride Ion Penetration Depth

In order to compare the chloride ion penetration depth between the composition prepared according to the present invention and the composition prepared in Comparative Example, JIS A 6203 (cement mixing polymer dispersion and re-emulsified powder) was used for each specimen prepared in Test Example 1. Resin) was performed and the results are shown in Table 4 below.

Table-4

As shown in Table 4, the composition (Examples 1 to 9) prepared in the present invention has a relatively low chloride ion penetration depth compared to the compositions prepared in Comparative Examples 1 to 4, resulting in resistance to salt damage. It was confirmed that this is high.

Test Example 6 Absorption Rate

In order to compare the water absorption of the composition prepared according to the present invention and the composition prepared in Comparative Example, the water absorption was measured by KS F 4004 (absorption test method of concrete brick) for each specimen prepared in Test Example 1. The results are shown in Table 5 below.

TABLE-5

As shown in Table 5, the compositions prepared in the present invention (Examples 1 to 9) had a higher water absorption than the compositions prepared in Comparative Examples 1 to 4.

In general, when concrete or asphalt concrete pavement is performed, water penetrates into the lower slab concrete layer, causing corrosion of reinforcing bars and whitening of the lower part of the bridge. The composition of the present invention is a polymer dispersion and a superabsorbent polymer. Due to the interaction, the moisture of the air does not penetrate the lower slab layer but stays only in the composition, and it is effective in suppressing corrosion of the rebar, and at the same time lowering the temperature of the pavement surface.

Test Example 7 Measurement of Slip Resistance

In order to compare the sliding resistance of the composition prepared according to the present invention and the composition prepared in Comparative Example, ASTM E303 (Method of Measuring Surface Friction), AASHTO T 278 (British pendulum) for each specimen prepared in Test Example 1 The surface friction characteristics measured by the tester) was performed, and the results are shown in Table-6.

Table-6

As shown in Table 6, the composition (Examples 1 to 9) prepared in the present invention was confirmed that the sliding resistance is higher than the composition prepared in Comparative Examples 1 to 4.

As described above, the absorbent polymer modified cemented carbide polymer cement paste composition and the road paving method using the same according to the present invention have been described through various embodiments, but the present invention is not limited to the embodiments described in detail herein. Various modifications can be made within the spirit and scope.

According to the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement of the present invention configured as described above and the road paving method using the same, the composition consisting of the ultrafine superhard cement mixture, polymer dispersion and other additives is semi It is a composition with stiffness, high adhesion to pavement such as asphalt, high resistance to plastic deformation, excellent durability and excellent color persistence, ensuring sufficient driver safety and excellent strength. Excellent savings in maintenance costs. In addition, in order to reduce the temperature rise in the air due to the generation of water vapor at the time of temperature rise, the absorbent polymer modified fast-curing polymer cement paste is prepared by mixing a polymer dispersion containing the absorbent polymer. It was.

Absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement can be used for coating and packaging in various places such as bus stops, highway access roads, intersections, etc. It is possible to save cost, labor loss and construction time, so it is possible to construct more economically. For reference, since the conventional polymer cement paste composition has to be metered in the field, the work is cumbersome and manpower loss occurs.

Claims (5)

Ultra fine cemented carbide mixed cement composed of 40 ~ 60 wt% of ultra fine cement, 10 ~ 20 wt% of ultrafine amorphous calcium aluminate, and 30 ~ 40 wt% of ultrafine blast furnace slag, and lithium carbonate and polymer dispersion. , The ultra fine cemented carbide mixed cement and lithium carbonate and polymer dispersion have a weight ratio of 100: 0.2 to 2.0: 30 to 50, The polymer dispersion is composed of a mixture of acrylic resin consisting of 70 to 90% by weight SBR latex, 10 to 30% by weight acrylic resin, starch and polyacrylic acid-based absorbent polymer, The mixture of the acrylic resin, starch and the polyacrylic acid-based absorbent polymer is a water-absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement, characterized in that the weight ratio is 100: 1-3. The method according to claim 1, The absorbent polymer-modified fast-curing polymer cement paste composition using the ultrafine cement is made of at least one or more of an antifoaming agent, a dispersant, a smoothing agent, a shrinkage reducing agent, and a pigment. The antifoaming agent is mixed in a weight ratio of 100: 1 to 4 with respect to the polymer dispersion, The rest is absorbent polymer using ultra-fine cement, characterized in that the mixture is mixed in a weight ratio of 100: 0.5 ~ 3.0, 100: 0.5 ~ 1.0, 100: 1 ~ 4, 100: 0.3 ~ 2.0 with respect to the ultra fine cemented carbide mixing cement Modified fast curing polymer cement paste composition. delete Laying the asphalt mixture on the roadway; Injecting the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement of claim 2 into a road on which an asphalt mixture is installed; Curing the package into which the absorbent polymer modified fast-curing polymer cement paste composition using the ultra fine cement is injected; The surface finishing step of finishing the surface of the cement paste composition after curing the absorbent polymer modified fast-curing polymer cement paste composition using the ultra-fine cement; absorbent polymer modified fast-curing polymer cement paste composition using ultra-fine cement, characterized in that consisting of Road paving method using. Laying the asphalt mixture on the roadway; Injecting the absorbent polymer modified fast-curing polymer cement paste composition using the ultrafine cement of claim 2 into a road on which an asphalt mixture is installed; Dispersing silica sand on the surface of the absorbent polymer-modified fast-curing polymer cement paste composition using the injected ultra-fine cement; Curing the pavement into which the absorbent polymer-modified fast-curing polymer cement paste composition is injected using the ultra-fine cement; and comprising the absorbent polymer-modified fast-curing polymer cement paste composition using the ultra-fine cement.

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