KR101311748B1 - The binder for water permeable concrete and paving method using the same - Google Patents

Abstract

PURPOSE: A mixing binder for water-permeable concrete is provided to use a water-soluble urethane binder and inorganic material powder for improving the adhesive force to aggregate without using cement, and to secure water permeability and high intensity. CONSTITUTION: A mixing binder for water-permeable concrete contains 100 parts by weight of inorganic material powder, and 30-50 parts by weight of a water-soluble urethane binder containing more than 30.5 wt% of solid parts. The inorganic material powder contains 60-80 wt% of water-cooled blast furnace slag with the fineness greater than 8,000 cm^2/g, 5-20 wt% of natural anhydrous gypsum with the anhydrous gypsum content greater than 80wt%, 5-20 wt% of natural lime, and 0.5-10 wt% of natural microfiber obtained from bamboo trees or corn. The inorganic material powder has the fineness greater than 7,000 cm^2/g, and includes greater than 25.0 wt% of SiO2, less than 10.0 wt% of Al2O3, and greater than 35.0 wt% of CaO. [Reference numerals] (AA) Arrange sub-bases; (BB) Form sub water-permeable concrete (first mixing of materials); (CC) Place the sub water-permeable concrete (first placement); (DD) Form super water-permeable concrete (second mixing of materials); (EE) Place the super water-permeable concrete (second placement); (FF) Care/finish; (GG,JJ) Form a mixing binder; (HH,KK) Inject 1/2 of the mixing binder/mix aggregate; (II,LL) Inject 1/2 of the mixing binder/mix

Description

Mixed binder for permeable concrete and drainage packaging method using the same {The binder for water permeable concrete and paving method using the same}

The present invention relates to a mixed binder for water-permeable concrete and a drainage packaging method using the same, wherein an inorganic powder without cement is mixed with a water-soluble urethane binder to form a mixed binder, and combined with aggregate to provide excellent water permeability. The present invention relates to a mixed binder for permeable concrete and a drainage packaging method using the same.

Recently, due to the acceleration of urbanization, the area of roads and grounds paved with asphalt and concrete is increasing. In particular, when paving pedestrian sidewalks, bicycle roads, farm roads, village roads in the unpaved concrete, concrete layers were formed to a predetermined thickness by using ready-mixed concrete composed mainly of cement and aggregate. That is, the existing unpaved surface is rolled out to form a bottom layer with a predetermined thickness, and a small size of gravel is installed on the surface of the bottom layer to a predetermined thickness to form an auxiliary layer, and sand, gravel and cement on the surface of the auxiliary layer. After forming the feed surface layer to a predetermined thickness of the mixed composition was solidified to form a concrete layer so as to form joints on the surface at regular intervals to cope with the stretching phenomenon by geothermal heat.

However, since the concrete layer formed by the above construction method solidifies over time, the water does not penetrate into the concrete layer and is not absorbed, so the surface water does not naturally penetrate into the basement. As it flows directly into the river or the sea through urban rivers or sewers, a sudden increase in quantity occurs during a short time, causing problems of urban flooding.

In order to solve this problem, the use of permeable concrete is being expanded to allow air to pass through the floor. Water permeable concrete is concrete that has formed continuous voids by using fine aggregates so that rainwater flowing along the surface of the concrete or stagnating can be easily penetrated underground. Since its introduction into the city, it has been widely used not only for sidewalks but also for roadways.

However, conventionally used permeable concrete has long curing period after paving roadbeds such as road, and the whole process takes a long time, and also increased the porosity in order to increase permeability, but there was a problem that the strength is lowered.

In addition, the conventional permeable concrete uses organic volatile coating materials and one type of Portland cement in the materials used, causing secondary soil contamination due to the leaching of heavy metals in the cement, and the water backflow due to the limitation of drainage function due to heavy rain. When whitening occurs on the surface, this whitening phenomenon not only reduces the durability, but also damages the aesthetics of the surface of the package, thereby increasing the cost of surface reprocessing, and when paving permeable concrete in multiple layers, There are various problems in terms of functionality and economics, such as the need to install a separate adhesive layer because it is a factor that degrades the adhesion.

Published Patent Publication No. 2005-0049821 (2005.05.27) Published Patent Publication No. 2003-0004194 (2003.01.14) Published Patent Publication No. 2002-0071241 (2002.09.12) Published Patent Publication No. 1996-0041526 (1996.12.19)

It is an object of the present invention to increase the adhesion to aggregates without using cement, to provide a natural binder and permeable concrete mixing binder that can realize a permeability and high strength, and a drainage packaging method using the same.

The mixed binder of the present invention includes 30 to 40 parts by weight of a water-soluble urethane binder based on 100 parts by weight of inorganic powder, wherein the inorganic powder is 60 to 80% by weight of blast furnace slag, 5 to 20% by weight of natural anhydrous gypsum and 5 to natural lime. 20 weight% and 0.5-10 weight% of natural fine fiber.

In addition, the present invention comprises a rearranging step of arranging the auxiliary base layer; A first mixing step of forming the lower permeable concrete by mixing the mixing binder with the aggregate of 6 to 10 mm; A first casting step of placing and compacting the lower permeable concrete on the auxiliary base layer to form a lower permeable concrete layer; A secondary mixing step of forming the upper permeable concrete by mixing the mixing binder with aggregate of 1 to 3 mm; A second placing step of placing and compacting the upper permeable concrete on the lower permeable concrete layer to form an upper permeable concrete layer; Curing step of curing curing the upper and lower permeable concrete layer; The surface finishing step of applying a water-soluble coating material to the cured upper permeable concrete layer.

Mixing binder according to the present invention is composed of inorganic powder and a water-soluble urethane binder, improve the compressive strength, adhesion strength, surface strength, tensile strength and durability without adding cement, and secure excellent permeability difficult to implement in cement concrete can do.

As the present invention improves permeability without using cement, pavement using the road can prevent rainwater from seeping into the ground during rainy weather and a water gushing phenomenon. In addition, the moisture permeated into the ground evaporates to a clear day surface has the effect of preventing ground weakening due to moisture infiltration.

In the present invention, by using inorganic powder instead of cement, as well as greenhouse gas reduction by reducing the amount of cement used, secondary environmental pollution caused by the addition of cement can be blocked in advance.

The present invention can improve the mixing ratio of the pigment by the addition of a water-soluble urethane binder, it is possible to realize a variety of colors through this, there is an anti-slip effect on the surface.

In the present invention, since the surface of the aggregate is coated and adhered by a mixed binder made of inorganic powder and a water-soluble urethane binder, compared to the conventional water-permeable concrete, it forms a continuous void of about 12% or more, and solidly without the flow of secondary surface finish. The porosity is maintained to provide excellent water permeability, and at the same time, it is possible to realize sufficient strength to withstand light vehicle loads such as general vehicles by minimizing the number of units.

The present invention consists of a permeable concrete layer comprising a lower permeable concrete layer containing 6 to 10 mm aggregates and an upper permeable concrete layer containing 1 to 3 mm aggregates, thereby preventing the blockage of pores by foreign matter, thereby maintaining excellent permeability. Done.

The present invention can improve the permeability while having excellent strength, prevent freezing damage due to winter function and drainage from the paved road surface to the roadbed can protect the underground ecosystem.

The present invention protects the soil by permeating water and air more smoothly with high permeability and air permeability to permeate water and air into the ground or evaporate into the atmosphere, and reduce the soil soil already damaged by impermeable pavement to the natural state. It has the effect of restoring its original properties.

In addition, the pavement according to the present invention has excellent water permeability, and is not only excellent in preserving the natural environment such as cultivation of groundwater, protection of underground ecosystems, and tree growth, but also very effective in improving the planting environment. to be.

In addition, the present invention is to prevent rainwater drainage, urban river flooding or flooding due to rainwater storage infiltration, to reduce the burden of sewage facilities, to reduce the load on the oil storage facility, to reduce the equipment, drainage and abatement In the case of heavy rains in summer, there are many effects such as minimizing the flood damage caused by the excessive flow rate to the stream temporarily.

1 is an exemplary view showing a water-permeable concrete layer structure according to the present invention
2 is an exemplary view showing a construction method according to the present invention

The present invention includes 30 to 40 parts by weight of a water-soluble urethane binder based on 100 parts by weight of inorganic powder,

The inorganic powder contains 60 to 80% by weight of blast furnace chain slag, 5 to 20% by weight of natural anhydrite, 5 to 20% by weight of natural lime, and 0.5 to 10% by weight of natural fine fiber.

The blast furnace chain slag is used in the powder degree of 8,000 cm 2 / g or more, such blast furnace chain slag powder is about 2 times higher than the general cement, it is easy to settle on the surface of the aggregate, the adhesive strength when combined with the urethane binder To improve. In addition, the blast furnace chain slag has latent hydrophobicity, and improves initial strength by generating ettringite.

The natural anhydrous gypsum is a natural mineral, and has a function of sulfate stimulant of blast furnace chain slag powder to express early strength.

The natural anhydrous gypsum mainly consists of dihydrate gypsum and anhydrous gypsum, the present invention uses more than 80wt% anhydrous gypsum content. When the anhydrous gypsum content is more than 80wt%, SO ₄ ^2- ions are adsorbed to the Al ₂ O ₃ active component in the blast furnace slag and precipitate in the pores with the formation of ettringite, thereby accelerating the initial hydration reaction. However, if less than 80wt%, the content of hydrated gypsum is relatively high, and if the content of hydrated gypsum increases, only about half of the soluble material SO ₄ ^2- ion is eluted compared to anhydrous gypsum at 20 ° C. As the SO ₄ ^2- ion elution decreases, the amount of ettringite is also relatively insufficient, resulting in a high shrinkage rate and a decrease in strength under low temperature conditions.

The natural lime is an alkaline stimulant for stably controlling the strength expression, and the acidic film formed on the surface of the slag particles is rapidly destroyed from the beginning of hydration to elute Si and Al ions enclosed in the particles. Hydration reaction of ions is actively progressed initially by rapid diffusion of hydration products.

The natural particulate fiber refers to a fiber extracted from a plant, such as bamboo or corn, and is located between each component to provide coagulation control and strength enhancement functions, as well as to provide antibacterial properties.

Particularly, the natural fine fiber extracted from bamboo does not easily reproduce mold, various bacteria, etc. due to its unique cooling and antibacterial properties, and it has not only strong water resistance but also contains sodium, copper, and chlorophyll. Can deodorize the road.

In addition, the natural fine fiber extracted from corn has resistance to microorganisms and has excellent elasticity.

Inorganic powder of the present invention made as described above has the chemical properties of the following [Table 1] and the physical properties of [Table 2].

Table 1

As shown in Table 1, the inorganic powder of the present invention should be used in the SiO ₂ content of 25.0wt% or more, when the SiO ₂ content is less than 25.0wt%, the durability of the inorganic powder is reduced. In addition, the inorganic powder of the present invention should have an Al ₂ O ₃ content less than 10.0wt%. In addition, the inorganic powder of the present invention uses a CaO content of 35.0wt% or more, when using less than 35wt%, durability and expandability is reduced.

[Table 1] is limited to the content of the inorganic powders according to the present invention to limit the content, the remaining components other than the components described in Table 1 is a component that does not significantly affect the properties of the inorganic powder of the present invention This is not described. In other words, the inorganic powder according to the present invention comprises a total of 100wt% including impurities in addition to the important components described in [Table 1].

[Table 2]

In addition, the inorganic powder according to the present invention, as shown in the above [Table 2], the powder is also provided with more than 7,000 cm 2 / g, it is to have a powder level of about 2 times higher than the general cement powder In addition, such a high powder degree is to improve the adhesion strength by mixing with a water-soluble urethane binder.

The water-soluble urethane binder is a urethane-based aqueous binder, solid content of 30.5wt% or more, specific gravity 1.04, pot life 60 minutes or more. The water-soluble urethane binder is well mixed with the pigment, and when mixed with the inorganic powder to form a mixing binder, the compressive strength, and exhibits the performance of improving the adhesion strength, surface strength, tensile strength. Such a water-soluble urethane binder has physical properties according to the following [Table 3].

[Table 3]

Hereinafter, the coating and packaging method using the mixed binder for water-permeable concrete according to the present invention will be described.

1 is an exemplary view showing the structure of the water-permeable concrete layer according to the present invention, Figure 2 is an exemplary view showing a construction method according to the present invention, the present invention is a cleanup step of arranging the auxiliary base layer; A first mixing step of mixing the mixing binder in the aggregate of 6 to 10 mm to form a lower permeable concrete; A first casting step of placing and compacting the lower permeable concrete on the auxiliary base layer to form a lower permeable concrete layer; A second mixing step of mixing the mixing binder with the aggregate of 1 to 3 mm to form the upper permeable concrete; A second placing step of placing and compacting the upper permeable concrete on the lower permeable concrete layer to form an upper permeable concrete layer; Curing step of curing curing the upper and lower permeable concrete layer; The surface finishing step of applying a water-soluble coating material to the cured upper permeable concrete layer.

The clean-up step is to clean up and pave the road surface to create a construction environment. In order to prevent the auxiliary base from rapidly sucking moisture from the lower permeable concrete, the auxiliary base is sprayed with water using a sprinkler wheel. At this time, spray too much water so that there is no place.

The first mixing step is to mix the lower permeable concrete by mixing 25 to 40 parts by weight of the mixing binder with respect to 100 parts by weight of the washed aggregate of 6 to 10 mm, the inorganic powder and the water-soluble urethane binder for about 50 to 80 seconds While stirring and mixing to form a mixing binder, and the mixture is mixed with aggregate for about 30 to 60 seconds by adding 1/2 of the mixed binder, and then adding the other half of the mixing binder for about 50 to 80 seconds Mix to form lower permeable concrete.

This mixing method is not only to promote uniform mixing of the inorganic powder and the water-soluble urethane binder, to uniformly adhere the mixing binder along the surface of the aggregate, but also to improve the adhesion of the mixing binder to the aggregate to lower the permeability concrete. It is for increasing the strength of the layer.

In addition, the primary mixing step may be used by adding 1 to 3 parts by weight of water to the mixing binder because the temperature may be more than 30 ℃ may adversely affect the strength due to the rapid evaporation of water.

At this time, since the mixing binder is a mixing binder according to the present invention, a detailed description thereof will be omitted.

In the first pouring step, the lower permeable concrete is first poured on the auxiliary base layer, and is compacted by using a vibration roller or a compactor. In addition, when compacting, the reference is about two times, and if the vibration stays in the same plane for more than 25 seconds, material separation is caused, resulting in a decrease in performance, and thus not staying for more than 25 seconds.

The second mixing step is to mix 25 to 40 parts by weight of the mixing binder with respect to 100 parts by weight of the washed aggregate of 1 to 3 mm to mix the upper permeable concrete, the inorganic powder and the water-soluble urethane binder for about 50 to 80 seconds While stirring and mixing to form a mixing binder, and half of the tangled mixing binder is mixed with the aggregate for about 30 to 60 seconds, and then the other half of the mixing binder is put into about 50 to 80 seconds While mixing to form the upper permeable concrete.

As the aggregate used in the first mixing step and the second mixing step, it is preferable to use the aggregate according to the specification of the following [Table 4].

[Table 4]

In the secondary casting step, the upper permeable concrete is poured on the lower permeable concrete layer to a thickness of about 1 to 2 cm and compacted by a vibration roller or a compactor. In addition, when compacting, the reference is about two times, and if the vibration stays in the same plane for more than 25 seconds, material separation is caused, resulting in a decrease in performance, and thus not staying for more than 25 seconds. As a result of the secondary casting, porosity is maintained and pore blocking is prevented.

The curing step protects the poured upper and lower permeable concrete layers by using vinyl or a curing cloth, and minimizes the damage caused by the temperature drop by using a warming curing cloth when the weather is below 10 ° C.

The surface finishing step is to spray the water-soluble coating material mixed with natural inorganic pigments and surface reinforcing agent within 0.3 mm to the surface of the cured upper permeable concrete layer to prevent surface material separation phenomenon, increase the durability, vivid color long-term To be preserved.

The water-soluble coating material is composed of acrylic liquid resin or EVA liquid resin 20-40wt%, liquid sodium silicate 10-30wt%, liquid silica sol 10-30wt%, thickener 5-15wt%, natural inorganic pigment 5-10wt% The surface hardener is mixed with water at a weight ratio of 1: 1 to 10. In this case, since the natural inorganic pigment is a known commercially available commercially available, a detailed description thereof will be omitted.

The water-soluble coating material made as described above serves to increase the adhesion by reacting with the upper surface of the water-permeable concrete layer, thereby preventing the separation of the raw material and improve the durability of the surface of the water-permeable layer. That is, when the water-soluble coating material is sprayed / coated on the upper permeable concrete layer, the active silica, which is one of the components, reacts to form insoluble bonds to provide stable surface durability, and the acrylic polymer forms an insoluble film, thereby releasing the raw material of the water-soluble coating material. It also prevents the formation and enhances the overall durability. The product features environmentally stable and stable insoluble coatings using eco-friendly organic-inorganic and composite materials that do not contain VOCs, volatiles and heavy metals. It will stay long.

The acrylic liquid resin or the EVA liquid resin affects the binder and the surface coating effect and the penetration resistance of water or salt, and the sodium silicate affects the binder and the curing rate and the surface coating and the water penetration resistance. Mix within the range.

The pavement road according to the present invention constructed as described above is laminated with the surface coating layer, the upper permeable concrete layer and the lower permeable concrete layer sequentially, not only has a high continuous porosity of about 12% or more as a whole, but also by a water-soluble coating Excellent water permeability by finishing the surface coating layer and the top permeable concrete layer using aggregates of 1 to 3 mm and the bottom permeable concrete layer using aggregates of 6 to 10 mm to prevent pore blocking while maintaining porosity. It will be provided.

Hereinafter, the present invention will be described in detail by way of examples.

Example 1

27 parts by weight of the mixing binder (20 parts by weight of the inorganic powder and 7 parts by weight of the water-soluble urethane binder) were mixed with respect to 100 parts by weight of the aggregate, and the permeable concrete was blended and poured to measure the compressive strength, the bending strength, and the permeability coefficient.

At this time, the inorganic powder was formulated according to [Table 5], the measurement results are shown in [Table 6]. Natural fine fiber used fine fiber extracted from bamboo.

[Table 5]

[Table 6]

Example 2

With respect to 100 parts by weight of aggregate, 27 parts by weight of a mixing binder (20 parts by weight of inorganic powder and 7 parts by weight of water-soluble urethane binder) were mixed to mix permeable concrete, and compression molding was carried out to form a test piece. The presence or absence was examined and the results are shown in [Table 7]. At this time, the inorganic powder was blended No. 3 according to the above [Table 5].

[Table 7]

In the above [Table 7], the present invention has an environmentally friendly property that no harmful substances are detected.

Example 3

With respect to 100 parts by weight of aggregate, 20 parts by weight of inorganic binder and 7 parts by weight of water were mixed and poured to measure compressive strength, bending strength, and permeability coefficient, and the permeability concrete of Example 1 (inorganic powder-No. 3 in Table 4). ).

At this time, the inorganic binder was used 1 type normal cement, slag cement, fly ash cement, the results are shown in [Table 8].

[Table 8]

As shown in the above [Table 8], the present invention can be seen that the compressive strength and the coefficient of permeability are excellent when compared with the permeable concrete in which the first group of cement, slag cement, and fly ash cement are mixed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10: auxiliary base layer 20: bottom permeable concrete layer
(30): upper permeable concrete layer (40): surface coating layer

Claims (8)

30 to 40 parts by weight of a water-soluble urethane binder having a solid content of 30.5 wt% or more based on 100 parts by weight of inorganic powder,
The inorganic powder is from 5 to 20% by weight of natural anhydrite, 5 to 20% by weight of natural lime, bamboo or corn, having a blast furnace slag 60 to 80% by weight or more, 8,000 ㎠ / g or more of anhydrous gypsum content It comprises 0.5 to 10% by weight of extracted natural particulate fiber,
The powder also has more than 7,000㎠ / g,
Mixing binder for water-permeable concrete, characterized in that it contains SiO ₂ content 25.0wt% or more, Al ₂ O ₃ content less than 10.0wt%, CaO content 35.0wt% or more.
delete delete delete Arranging the auxiliary base;
A first mixing step of mixing the mixing binder in the aggregate of 6 to 10 mm to form a lower permeable concrete;
A first casting step of placing and compacting the lower permeable concrete on the auxiliary base layer to form a lower permeable concrete layer;
A second mixing step of mixing the mixing binder with the aggregate of 1 to 3 mm to form the upper permeable concrete;
A second placing step of placing and compacting the upper permeable concrete on the lower permeable concrete layer to form an upper permeable concrete layer;
Curing step of curing curing the upper and lower permeable concrete layer;
To include a surface finishing step of applying a water-soluble coating to the cured upper permeable concrete layer;
The mixing binder,
Mineral powder containing 60 to 80% by weight of blast furnace chain slag, 5 to 20% by weight of natural anhydrous gypsum, 5 to 20% by weight of natural lime, and 0.5 to 10% by weight of natural fine fiber, and having a powder of 7,000 cm 2 / g or more Per 100 parts by weight,
Drainage packaging method using a mixed binder for water-permeable concrete, characterized in that it comprises 30 to 40 parts by weight of a water-soluble urethane binder.
The method of claim 5, further comprising:
The first mixing step is to mix 25 to 40 parts by weight of the mixing binder consisting of the inorganic powder and the water-soluble urethane binder with respect to 100 parts by weight of the washed aggregate of 6 to 10 mm, the inorganic powder and the water-soluble urethane binder for 50 to 80 seconds Stir and mix to form a mixing binder, add 1/2 of the mixing binder and mix with aggregate for 30 to 60 seconds, then add the remaining 1/2 of the mixing binder and mix for 50 to 80 seconds Forming concrete,
In the second mixing step, 25 to 40 parts by weight of the mixing binder made of the inorganic powder and the water-soluble urethane binder are mixed with respect to 100 parts by weight of the washed aggregate of 1 to 3 mm, and the inorganic powder and the water-soluble urethane binder are mixed for 50 to 80 seconds. Stir and mix to form a mixing binder, add 1/2 of the mixing binder and mix with aggregate for 30 to 60 seconds, then add the remaining 1/2 of the mixing binder and mix for 50 to 80 seconds Drainage paving method using a mixed binder for permeable concrete, characterized in that to form concrete.
The method of claim 5, further comprising:
The secondary casting step is a drainage packaging method using a mixed binder for permeable concrete, characterized in that the upper permeable concrete is cast on the lower permeable concrete layer 1 ~ 2 cm thick.
The method of claim 5, further comprising:
The water-soluble coating material is composed of acrylic liquid resin or EVA liquid resin 20-40wt%, liquid sodium silicate 10-30wt%, liquid silica sol 10-30wt%, thickener 5-15wt%, natural inorganic pigment 5-10wt% Drainage packaging method using a mixed binder for water-permeable concrete, characterized in that the surface strengthening agent is mixed with water in a weight ratio of 1: 1 to 10.

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