KR101011504B1 - Color milk grout and method for concrete pavement enabling traffic opening using this - Google Patents

Abstract

PURPOSE: A color milk grout and a concrete pavement method for enabling early traffic opening using the same are provided to improve strength and durability for a long time by strong joint with concrete. CONSTITUTION: A color milk grout consists of Portland cement 55~76 weight%, fast-hardening cement 10~15 weight%, calcium sulfoaluminate 5~10 weight%, gypsum 1~3 weight%, re-emulsification type polymer 4~8 weight%, pigment 2~5 weight%, and admixture 2~5 weight%. A concrete pavement method for enabling early traffic opening using the same comprises following steps. Water-permeable concrete is placed on a road where ground work is completed.

Description

Color milk grout and early opening concrete paving method using the same {COLOR MILK GROUT AND METHOD FOR CONCRETE PAVEMENT ENABLING TRAFFIC OPENING USING THIS}

The present invention relates to a grout and a concrete pavement method using the same, and more specifically, to install a permeable concrete on the road surface is completed for ground repair and pavement such as bus lanes, bicycle lanes, child protection zones, etc. Color milk grout that can secure long-term durability of road pavement by incorporating high-performance color milk grout of fast curing that does not cause environmental problems or fade, and the method of early opening concrete pavement using the same It is about.

In recent years, color paving has been constructed in special sections such as bus lanes, bicycle lanes, and child protection areas to ventilate vehicle driving lanes or safe driving speeds to drivers, thereby violating traffic laws or accidental traffic accidents. It is preventing it from being caused.

However, in the case of color packaging using color asphalt or paint, the color paint melts according to changes in the natural environment such as snow and rain, causing environmental problems or fading, while existing concrete pavement has excellent durability. However, there is a problem that it is difficult to apply for repair that requires fast opening because it requires a long time curing than asphalt.

In addition, in case of the existing color ascon, the damage caused by heavy vehicles when applied to bus lanes, for example, is frequently caused by braking of the bus vehicle at the station and concentration of loads generated at the departure. In this case, the coating film is easily damaged by friction with the vehicle, or the coating film is lifted up due to seasonal temperature change, and in particular, a problem of sliding the vehicle during a wet season such as a rainy season is caused.

Conventional technologies for solving the above problems include Korean Patent Nos. 10-0902937 and 10-0895214, which are patents for producing colored concrete by adding pigments in concrete production. Although there is an advantage in producing concrete having various colors, the time required for curing the concrete is not suitable for repairing, and there is a problem in that the pigment melts in the concrete.

In addition, in the case of Korean Patent No. 10-0638785, it uses a scarlet powder as a permeable concrete packaging method to represent colors other than ocher color, and it has a disadvantage in that it produces a color by spraying a slurry type product on the permeable concrete. While the wear of the surface has a problem that the color can be discolored in a short time, the Korean Patent No. 10-0819500 is a technique related to the color asphalt pavement paved by using a pigment pigment containing the resin in conventional asphalt Due to the high cost of synthetic resins, the cost increases and durability is inferior to concrete.

On the other hand, according to the 2006 Korea Construction Waste Recycling Statistics Survey report, construction waste shows a steady increase from 28,754 tons in 2000 to 61,680 tons in 2006. Among the waste concrete, 18,013 tons in 2000 and 40,258 tons in 2006 In addition, industrial waste recycling rate has increased from 84.7% in 2000 to 97% in 2006, and 62% of construction waste is recycled into recycled aggregates. Most 72.4% are used only for low-grade fill, cover, backfill and backfill, so it is necessary to find an effective treatment plan.

The present invention has been made to solve the above problems of the prior art, the color paint of the existing paint type is aesthetics due to the melting of the paint in accordance with changes in the natural environment, such as snow, rain, causing environmental problems or fading It is a technology that can apply concrete that is more durable than asphalt as well as to complement disadvantages such as hatch, and can be solidly bound with concrete to secure strength and long-term durability, and early opening concrete paving method using the same. The purpose is to provide.

In order to achieve the above object, the color milk grout according to the present invention includes 55 to 76% by weight of Portland cement, 10 to 15% by weight fast cement, 5 to 10% by weight of calcium sulfur aluminate, and 1 to 3 gypsum. It consists of a weight%, 4-8 weight% of reemulsification type polymers, 2-5 weight% of pigments, and 2-5 weight% of admixtures.

Wherein the re-emulsifying polymer is at least one selected from the group consisting of ethylene vinyl acetate (EVA), styrene butadiene rubber (SBR), vinyl acetate, styrene acrylic ester and polyacrylic ester, the pigment is manganese oxide, chromium oxide , At least one selected from the group consisting of iron oxide and cobalt oxide, and the admixture may be an AE agent (Air-Entraining agent), a water reducing agent, an AE water reducing agent, a fluidizing agent, a retardant, a curing accelerator, a steel antirust agent, a foaming agent, a waterproofing agent, a thickening agent. And at least one selected from the group consisting of antifoaming agents.

On the other hand, the early opening concrete pavement method using the color milk grout according to the present invention, the first step of pouring the permeable concrete on the ground surface is completed; And a second step of mixing and pouring the color milk grout with water to the poured permeable concrete.

Wherein the permeable concrete is 8 to 15% by weight of Portland cement, 2 to 5% by weight fast cement, 1 to 3% by weight of calcium sulfur aluminate, 72 to 88% by weight of coarse aggregate of 5 to 25mm particle size, admixture It is made of 1 to 5% by weight, the coarse aggregate is characterized in that at least one selected from the group consisting of recycled aggregates, strong gravel and crushed stone.

As described above, the color milk grout and the early-opening concrete pavement method using the same according to the present invention are made of inorganic materials that are eco-friendly and do not discolor, and various colors can be applied to the bus lanes, bicycle lanes, child protection zones. By injecting into the permeable concrete placed on the road surface for construction, the grout is infiltrated with the permeable concrete so that the binding between the inorganic materials is achieved, so as not to cause problems such as discoloration of the color and dissolution of the pigment while increasing strength and durability. can do.

In addition, it secures the properties such as fastness, abrasion resistance, adhesive force, compressive strength and workability necessary for repairing and paving new paving roads, and can replace paving materials and construction methods such as color asphalt and paint, which have been used for color paving. In particular, the curing time, which is a disadvantage of concrete pavement, can be drastically reduced, so that the common time equivalent to asphalt can be secured, which is very useful for road repair and new paving.

In addition, by using recycled aggregates for road pavement as permeable concrete materials, it is possible to reduce treatment costs and energy through recycling industrial wastes.

1 is a plan view showing a state in which the color milk grout is applied to the pitcher concrete according to the present invention.
Figure 2 is a side view showing a state in which the color milk grout applied to the pitcher concrete according to the present invention.

Hereinafter, with reference to the drawings will be described a color milk grout and early opening concrete pavement method using the same.

Preferred color milk grout according to the present invention is 55 to 76% by weight of Portland cement, 10 to 15% by weight fast cement, 5 to 10% by weight of calcium sulfur aluminate, 1 to 3% by weight of gypsum, re-emulsification type It consists of 4-8 weight% of polymers, 2-5 weight% of pigments, and 2-5 weight% of admixtures.

The portland cement is used to ensure the strength of the grout, and the fast cement is used to combine the portland cement to give fast and roughness to the grout so that road repair and new pavement can be carried out quickly, it is applied to less than the range described In this case, the early strength may not be expressed due to the decrease in strength and the delay of condensation, which may cause a problem in that early opening becomes difficult, and when applied beyond the range, the problem of rapid workability and the occurrence of microcracks occurs. .

The calcium sulfur aluminate and gypsum are used for the purpose of expansion agent to compensate for the shrinkage generated during the hydration of cement, more specifically, Ettringite, which combines with portland cement to develop early strength of the grout and needle-like expansion material. It is used for shrinkage compensation before complete formation of hydrate tissue by forming (Eteringite), and it is preferable to add 5 to 10% by weight of calcium sulfur aluminate and 1 to 3% by weight according to the amount of Portland cement. The reason for this is that the input effect is insufficient when it is below the range, and when it exceeds the range, cracking may occur due to overexpansion.

The re-emulsified polymer forms a film integrated in the grout to be combined with the water-permeable concrete to prevent water tightness and dissolution of the pigment, to prevent penetration of water and harmful substances by filling the voids, to reduce shrinkage, and to prevent wear and tear. It plays a role of chemical properties, mechanical properties to resist warpage and impact, and gives viscosity to prevent material separation during operation, in particular ethylene vinyl acetate (EVA), styrene-butadiene rubber (SBR), vinyl acetate vinyl acetate, styrene At least one member selected from the group consisting of acrylic esters and polyacrylic esters may be used, and 4 to 8% by weight may be added to prevent the use of more re-emulsified polymers while the function is sufficiently expressed.

The pigment is intended to give the color of the grout can be added to 2-5% by weight to give the grout clearly visible color, the pigment is an inorganic pigment composed of manganese oxide, chromium oxide, iron oxide, cobalt oxide It is more preferable to use at least one selected from the group.

The admixture is one or more selected from the group consisting of AE (Air-Entraining agent), water reducing agent, AE water reducing agent, fluidizing agent, retardant, curing accelerator, rebar rust inhibitor, foaming agent, waterproofing agent, expanding agent, thickener and antifoaming agent, Appropriately adopted and used to perform the usual known functions related to workability during construction, such as adjusting the time, developing the appropriate viscosity, and reducing the amount of air.

1 and 2 are a plan view and a side view showing a state in which the color milk grout is applied to the pitcher concrete according to the present invention.

On the other hand, the early opening concrete pavement method using the color milk grout according to the present invention is the first step of placing the permeable concrete on the ground surface, and the color milk grout of the present invention as described in the poured permeable concrete And a second step of injecting.

Permeable concrete in the first step is 8 to 15% by weight of Portland cement, 2 to 5% by weight fast cement, 1 to 3% by weight of calcium sulfur aluminate, 72 to 88 weight of coarse aggregate of 5 to 25mm particle size %, And 1 to 5% by weight of admixture, and 6 to 12 parts by weight of water is added to and blended with 100 parts by weight of the permeable concrete solid content, and then the surface is uniformly poured.

Such permeable concrete is composed of almost the same material used in the color milk grout of the present invention. In the case of Portland cement, the surface of the coarse aggregate is coated to prevent the absorption of moisture into the aggregate and to connect the aggregate to the aggregate. It is preferable to add ˜15% by weight, and in the case of fast cement, it is preferable to use 2 to 5% by weight to react with portland cement so that the permeable concrete has a fast hardness, while not used in the grout of the present invention described. In the case of coarse aggregates, at least one selected from the group consisting of recycled aggregates, cobbles, and crushed stone having a particle size of 5 to 25 mm is used so that grout can be filled with a predetermined gap between aggregates. Particularly, the recycled aggregate has improved shape in the regeneration process, and thus has a rounder shape than the general crushed stone, thereby forming a certain void in the permeable concrete to improve the packaging strength and durability according to the uniform filling of the grout. For reference, when coarse aggregate is added less than 72% by weight, it is difficult to inject grout due to the decrease in porosity due to the increase of cement paste, and when added in excess of 88% by weight, the workability decreases and the strength decreases. Problems such as this occur. Since the calcium sulfaluminate and admixture exhibit the functions as described, details thereof will not be mentioned.

In the second step, 35-50 parts by weight of water is added and blended with respect to 100 parts by weight of color milk grout, followed by pouring and injecting the same into a predetermined gap of coarse aggregate, thereby pouring the permeable concrete. Next, by allowing the color milk grout to be injected into the permeable concrete, the curing time, which is a disadvantage of concrete pavement, is drastically reduced, thereby securing a traffic opening time similar to the time required for asphalt pavement.

Hereinafter, a color milk grout and an early-opening concrete pavement method using the same will be described through examples.

Example

70 g of water was mixed with the water-permeable concrete of the formulation as shown in Table 1 below, and 500 g of water was mixed with the color milk grout of the formulation as shown in Table 2 and injected into the specimen to complete the package test group. Physical properties of the general concrete produced in the same size as the specimen as the physical properties and the control is shown in Table 3 below.

division Weight (g) Portland Cement 100.0 Fast cement 50 Coarse aggregate 840.0 Functional Admixture 10.0 system 1,000

division Weight (g) Portland Cement 600.0 Fast cement 250.0 Calcium Sulfur Aluminate (CSA) 60.0 gypsum 10.0 Remulsifying Polymer 40.0 Pigment 20.0 Admixture 20.0 system 1,000

division result standard 6 hours compressive strength (MPa) 11.2 0 Daily Compressive Strength (MPa) 22.6 6.3 3-day compressive strength (MPa) 29.4 9.1 7 Day Compressive Strength (MPa) 32.1 14.0 28 Day Compressive Strength (MPa) 38.3 24.2 6 hours bending strength (MPa) 5.1 0 Daily Flexural Strength (MPa) 6.1 2.1 3-day flexural strength (MPa) 6.9 2.5 7-day flexural strength (MPa) 7.5 3.0 28 days flexural strength (MPa) 8.9 4.5 Freeze thawing resistance (%) 90.2 80 Wear resistance (%) 18 25

As described above, it can be seen that the color milk grout and the early-opening concrete pavement method using the same exhibit very excellent physical properties in comparison with general concrete in terms of compressive strength, flexural strength, and wear resistance.

Claims (7)

55 to 76% by weight of Portland cement, 10 to 15% by weight fast cement, 5 to 10% by weight of calcium sulfur aluminate, 1 to 3% by weight of gypsum, 4 to 8% by weight of reemulsifying polymer, pigment 2 It consists of ~ 5% by weight, admixture 2 ~ 5% by weight,
The pigment is color milk grout, characterized in that at least one selected from the group consisting of manganese oxide, chromium oxide, iron oxide and cobalt oxide. The method according to claim 1,
The re-emulsifying polymer is a color milk grout, characterized in that at least one selected from the group consisting of ethylene vinyl acetate (EVA), styrene butadiene rubber (SBR), vinyl acetate, styrene acrylic ester and polyacrylic ester. delete The method according to claim 1,
The admixture is a color characterized in that at least one selected from the group consisting of AE agent (Air-Entraining agent), water reducing agent, AE water reducing agent, fluidizing agent, retardant, curing accelerator, rebar rust inhibitor, foaming agent, waterproofing agent, thickener and antifoaming agent. Milk grout.
A first step of pouring permeable concrete onto the road surface on which the ground work is completed;
Early opening concrete pavement using a color milk grout, characterized in that the second step of mixing and pouring the color milk grout according to any one of claims 1, 2 and 4 in the poured permeable concrete; Way. The method according to claim 5,
The water-permeable concrete is 8 to 15% by weight of Portland cement, 2 to 5% by weight fast cement, 1 to 3% by weight of calcium sulfur aluminate, 72 to 88% by weight of coarse aggregate of 5 to 25mm particle size, admixture 1 Early-opening concrete paving method using a color milk grout, characterized in that consisting of ~ 5% by weight. The method of claim 6,
The coarse aggregate is a pre-opening concrete paving method using a color milk grout, characterized in that at least one selected from the group consisting of recycled aggregates, strong gravel and crushed stone.

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