KR102617930B1 - Infiltration type rainwater reservoir system having eco-friendly water permeable concrete composition with recycled aggregates - Google Patents

Abstract

The present invention includes a ground layer 500 excavated to a certain depth; A sand layer 400 formed by stacking on the bottom surface of the ground layer 500; A non-woven fabric layer (300) applied to a certain thickness on the upper surface of the sand layer (400) and the excavated surface of the ground layer (500); A crushed stone layer (200) formed by lamination and filling the inner surface of the non-woven fabric layer (300); Infiltration-type rainwater including a permeable concrete rainwater gutter 100 that is inserted into the crushed stone layer 200 and has a bottom and an outer surface adjacent to the crushed stone layer 200, but is formed at the top to allow rainwater to flow in. As a receiving system;
The pervious concrete rain gutter 100 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, and has a porosity of 13 to 28% and a permeability coefficient of 3 mm/sec or more. A grating (120) that is open at the top to allow rainwater to flow in, and is fixedly installed by hanging on the permeable concrete body (110); A first pipe 130 connected to one side of the permeable concrete body 110 and having an inclination so that the incoming rainwater can be collected by gravity. and is connected to the opposite direction of the one side portion, is formed in a direction that is offset from the central axis of the first pipe 130, and has an inclination so that rainwater collected in the permeable concrete body 110 can be discharged by gravity. It includes a second pipe 140 connected obliquely;
The eco-friendly permeable concrete composition containing the recycled aggregate includes 65 to 85% by weight of recycled aggregate, 10 to 30% by weight of cement, and 1 to 10% by weight of water;
The recycled aggregate includes an aggregate pretreatment step of grinding waste concrete according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then removing fine powder and foreign substances attached to the surface of the aggregate; An acid treatment step of maximizing pores of the aggregate by immersing the aggregate for which the aggregate pretreatment has been completed in an aqueous hydrochloric acid solution to elute calcium chloride; And an accelerated carbonation step of improving the strength of the aggregate by immersing the acid-treated aggregate in an aqueous carbonate solution in which carbon dioxide is dissolved in water to recrystallize the calcium chloride remaining on the pore surface of the aggregate into high-purity calcium carbonate. By using what is treated as a processing method;
By allowing rainwater collected and transported during rainfall to stably infiltrate into the ground, it facilitates rainwater flow and water circulation. It is eco-friendly by recycling recycled aggregate, an industrial by-product, and continuously maintains water permeability while maintaining excellent strength and water circulation. This relates to a permeable rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate that is durable and can maintain consistent quality.

Description

Infiltration type rainwater guttering system with eco-friendly permeable concrete composition containing recycled aggregate

The present invention facilitates rainwater flow and water circulation by allowing rainwater collected and moved during rainfall to stably infiltrate into the ground, and is environmentally friendly by recycling recycled aggregate, an industrial by-product, while continuously maintaining water permeability. This relates to a permeable rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate that can achieve excellent strength and durability and maintain consistent quality.

As urban development advances and expands, the ground surface is covered with road pavements, sidewalk blocks, and buildings made of impermeable asphalt, cement concrete, etc. Accordingly, during rainfall, it is difficult for rainwater that falls on road pavements or sidewalks to naturally penetrate into the ground, and is flown directly into rivers, etc. In particular, in Korea, it rains intensively during the summer rainy season, and topographically, there are many mountainous terrains with steep slopes. As urbanization has recently progressed rapidly, many places have had impermeable layers of pavement built on the ground, so rain that falls intensively for a short period of time does not reach the ground. Because it did not permeate sufficiently, it could not replenish groundwater, and it often flowed into the sea through streams and rivers, causing flood damage. As a result, the amount of rainwater seeping into the ground is reduced and groundwater is depleted, causing various problems due to water circulation disorders such as land subsidence, slowed growth of trees, and destruction of the ecosystem.

Therefore, in that rainwater, the source of water, is directly managed, there is an urgent need to develop a system that can easily control rainwater flow according to the amount of precipitation and facilitate water circulation using less cost and energy compared to other water management facilities. This is the situation. In other words, it is necessary to recognize rainwater as a usable resource and develop facilities and systems to continuously manage rainwater.

In order to solve these conventional problems, by manufacturing and constructing a rainwater catchment structure using porous concrete with water permeability, rainwater is filtered to remove impurities and penetrate into the existing soil below the ground surface to easily control the rainwater flow. , The goal was to facilitate water circulation.

However, the permeable concrete of this conventional infiltration-type rainwater catchment system had pores easily clogged due to the inflow of soil, suspended matter, and contaminants after a certain period of time, making it difficult to maintain the permeability function continuously. As a result, there was a problem in that flood damage frequently occurred. . In addition, in these conventional permeable concrete structures, the strength of the structure decreases as the volume of voids is increased to improve permeability, and chloride is easily dissolved in rainwater and permeated due to snow removers sprayed on the road. , due to winter snowfall and temperature drops, rainwater penetrating inside the concrete structure repeatedly freezes and thaws, resulting in various problems of durability degradation, such as shortening the service life of the concrete structure.

Meanwhile, a huge amount of construction industry by-products are generated at domestic construction sites, and waste concrete, which accounts for the largest proportion of these construction industry by-products, is generated annually at about 42.13 million tons. In Korea, policies such as recycling support measures for waste concrete are insufficient, and disposal costs are increasing every year due to waste generation due to dismantling construction without considering waste treatment and recycling. Accordingly, construction waste, which accounts for more than 80% of construction waste (inorganic construction waste such as waste concrete, waste asphalt concrete, waste bricks, waste blocks, waste tiles, etc., of which waste concrete accounts for more than 80%) is shredded into physical and waste materials. It is institutionalized to be recycled into recycled aggregate through a chemical treatment process, and public construction projects are mandatorily required to use a certain percentage of used aggregate as recycled aggregate.

However, in the case of recycled aggregate for concrete, old mortar is attached to the surface, which reduces workability, increases slump and changes in air volume over time, reduces strength characteristics such as compression, tension, bending, shear, fatigue, and elastic modulus, and causes drying. There were problems in which the physical and mechanical properties of concrete could be deteriorated, such as shrinkage, crack occurrence, increase in creep, freeze-thaw, neutralization, salt damage, and decrease in durability such as chemical resistance. In addition, in order to satisfy KS quality regulations, recycled aggregate not only requires a lot of economic costs, such as removing the old mortar attached to the recycled aggregate, but also has the problem of making it difficult to secure consistent quality.

Republic of Korea Patent No. 10-0731773 Republic of Korea Patent No. 10-1195378 Republic of Korea Patent No. 10-1334884 Republic of Korea Patent No. 10-1553509

The present invention was devised to solve the above-mentioned problems, and one embodiment of the present invention can prevent depletion of groundwater by smoothing rainwater flow and water circulation, recycling recycled aggregate, which is an industrial by-product, and soil and sand. , a permeable rainwater gutter system applied with an eco-friendly permeable concrete composition containing recycled aggregate that prevents pores from being easily clogged due to the inflow of suspended matter and contaminants, while realizing excellent strength and durability and maintaining uniform quality. This is what we want to provide.

The various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

One embodiment of the present invention includes a ground layer 500 excavated to a certain depth; A sand layer 400 formed by stacking on the bottom surface of the ground layer 500; A non-woven fabric layer (300) applied to a certain thickness on the upper surface of the sand layer (400) and the excavated surface of the ground layer (500); A crushed stone layer (200) formed by lamination and filling the inner surface of the non-woven fabric layer (300); Infiltration-type rainwater including a permeable concrete rainwater gutter 100 that is inserted into the crushed stone layer 200 and has a bottom and an outer surface adjacent to the crushed stone layer 200, but is formed at the top to allow rainwater to flow in. As a receiving system;

The pervious concrete rain gutter 100 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, and has a porosity of 13 to 28% and a permeability coefficient of 3 mm/sec or more. A grating (120) that is open at the top to allow rainwater to flow in, and is fixedly installed by hanging on the permeable concrete body (110); A first pipe 130 connected to one side of the permeable concrete body 110 and having an inclination so that the incoming rainwater can be collected by gravity. and is connected to the opposite direction of the one side portion, is formed in a direction that is offset from the central axis of the first pipe 130, and has an inclination so that rainwater collected in the permeable concrete body 110 can be discharged by gravity. It includes a second pipe 140 connected obliquely;

The eco-friendly permeable concrete composition containing the recycled aggregate includes 65 to 85% by weight of recycled aggregate, 10 to 30% by weight of cement, and 1 to 10% by weight of water;

The recycled aggregate includes an aggregate pretreatment step of grinding waste concrete according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then removing fine powder and foreign substances attached to the surface of the aggregate; An acid treatment step of maximizing pores of the aggregate by immersing the aggregate for which the aggregate pretreatment has been completed in an aqueous hydrochloric acid solution to elute calcium chloride; And an accelerated carbonation step of improving the strength of the aggregate by immersing the acid-treated aggregate in an aqueous carbonate solution in which carbon dioxide is dissolved in water to recrystallize the calcium chloride remaining on the pore surface of the aggregate into high-purity calcium carbonate. Provided is a permeable rainwater gutter system applied with an eco-friendly permeable concrete composition containing recycled aggregate, which is treated by a treatment method.

The recycled aggregate further includes the step of coating the surface of the accelerated carbonation-completed aggregate with a foaming performance-enhancing coating and then foaming the surface to treat the surface;

The foamable performance-enhancing coating agent includes 100 parts by weight of poly(meth)acrylimide, 30 to 50 parts by weight of styrene butadiene rubber, 10 to 30 parts by weight of ethylene vinyl acetate, 1 to 10 parts by weight of iron hydroxide, 1 to 10 parts by weight of organic acid, and carbonic acid. It may contain 0.5 to 5 parts by weight of sodium hydrogen, 0.5 to 5 parts by weight of a dispersant, and 50 to 100 parts by weight of a solvent.

The dispersant is a mixture of sodium or potassium salt of polyoxyethylene alkyl ether sulfuric acid ester, N-methyl-morpholine-N-oxide and sodium hexametal phosphate in a weight ratio of 1:0.1 to 0.5:0.1 to 0.5;

The solvent may be a mixture of water, dimethyl sulfoxide (DMSO), and C1 to C4 alkyl alcohol in a weight ratio of 1:0.2 to 0.7:0.1 to 0.3.

The iron hydroxide is an iron hydroxide powder having a chestnut shape;

The iron hydroxide powder having the shape of a chestnut is prepared by adding an Fe precursor compound to an aqueous solution of carbonyl diamide (CH ₄ N ₂ O) at a concentration of 1 to 10 M to a concentration of 1 to 10 M, and then adding 0.001 to 0.001 to 0.001 of cetyltrimethylammonium bromide. Preparing a mixed solution by adding and mixing 0.005 mole; reacting the mixed solution at a temperature of 70 to 150° C. for 0.5 to 3 hours; And filtering and washing the reaction product after completion of the reaction, then drying it at a temperature of 40 to 80 ° C. for 1 to 10 hours to prepare iron hydroxide powder having a chestnut shape.

The eco-friendly permeable concrete composition containing the recycled aggregate further includes 0.1 to 5% by weight of a performance improver;

The performance improver includes 100 parts by weight of red clay, 30 to 70 parts by weight of metakaolin, 10 to 30 parts by weight of zeolite, 5 to 15 parts by weight of styrene butadiene rubber, 1 to 10 parts by weight of fluorocarbon resin, and pipette represented by the following formula (1). It may contain 0.1 to 5 parts by weight of piperonylic acid and 0.1 to 5 parts by weight of ursolic acid.

[Formula 1]

According to an infiltration type rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate according to an embodiment of the present invention; Rainwater collected and transported during rainfall is filtered and discharged to the outside through the porous pores of the permeable rainwater catchment system of the present invention, which has the effect of allowing rainwater to stably infiltrate into the ground. As a result, rainwater flow can be easily controlled, water circulation can be facilitated, and depletion of groundwater can be effectively prevented. In addition, it is eco-friendly by maximizing the recycling effect of recycled aggregate, which is an industrial by-product, and effectively prevents pores from being easily clogged due to the inflow of soil, suspended matter, and contaminants, thereby maintaining water permeability on a continuous basis. At the same time, it has the effect of realizing excellent strength and durability and maintaining consistent quality.

Figures 1 and 2 show a schematic cross-sectional view of a permeable rainwater gutter system to which an eco-friendly permeable concrete composition containing recycled aggregate is applied according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention includes a ground layer 500 excavated to a certain depth; A sand layer 400 formed by stacking on the bottom surface of the ground layer 500; A non-woven fabric layer (300) applied to a certain thickness on the upper surface of the sand layer (400) and the excavated surface of the ground layer (500); A crushed stone layer (200) formed by lamination and filling the inner surface of the non-woven fabric layer (300); Infiltration-type rainwater including a permeable concrete rainwater gutter 100 that is inserted into the crushed stone layer 200 and has a bottom and an outer surface adjacent to the crushed stone layer 200, but is formed at the top to allow rainwater to flow in. As a receiving system;

The pervious concrete rain gutter 100 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, and has a porosity of 13 to 28% and a permeability coefficient of 3 mm/sec or more. A grating (120) that is open at the top to allow rainwater to flow in, and is fixedly installed by hanging on the permeable concrete body (110); A first pipe 130 connected to one side of the permeable concrete body 110 and having an inclination so that the incoming rainwater can be collected by gravity. and is connected to the opposite direction of the one side portion, is formed in a direction that is offset from the central axis of the first pipe 130, and has an inclination so that rainwater collected in the permeable concrete body 110 can be discharged by gravity. It includes a second pipe 140 connected obliquely;

The eco-friendly permeable concrete composition containing the recycled aggregate includes 65 to 85% by weight of recycled aggregate, 10 to 30% by weight of cement, and 1 to 10% by weight of water;

The recycled aggregate includes an aggregate pretreatment step of grinding waste concrete according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then removing fine powder and foreign substances attached to the surface of the aggregate; An acid treatment step of maximizing pores of the aggregate by immersing the aggregate for which the aggregate pretreatment has been completed in an aqueous hydrochloric acid solution to elute calcium chloride; And an accelerated carbonation step of improving the strength of the aggregate by immersing the acid-treated aggregate in an aqueous carbonate solution in which carbon dioxide is dissolved in water to recrystallize the calcium chloride remaining on the pore surface of the aggregate into high-purity calcium carbonate. Provided is a permeable rainwater gutter system applied with an eco-friendly permeable concrete composition containing recycled aggregate, which is treated by a treatment method.

According to an infiltration-type rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate according to an embodiment of the present invention; Rainwater collected and transported during rainfall is filtered and discharged to the outside through the porous pores of the permeable rainwater catchment system of the present invention, which has the effect of allowing rainwater to stably infiltrate into the ground. As a result, rainwater flow can be easily controlled, water circulation can be facilitated, and depletion of groundwater can be effectively prevented. In addition, it is eco-friendly by maximizing the recycling effect of recycled aggregate, which is an industrial by-product, and effectively prevents pores from being easily clogged due to the inflow of soil, suspended matter, and contaminants, thereby maintaining water permeability on a continuous basis. At the same time, it has the effect of realizing excellent strength and durability and maintaining consistent quality.

A permeable rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate according to an embodiment of the present invention includes a ground layer 500 excavated to a certain depth; A sand layer 400 formed by stacking on the bottom surface of the ground layer 500; A non-woven fabric layer (300) applied to a certain thickness on the upper surface of the sand layer (400) and the excavated surface of the ground layer (500); A crushed stone layer (200) formed by lamination and filling the inner surface of the non-woven fabric layer (300); It includes a permeable concrete rain gutter 100 that is inserted into the crushed stone layer 200 and has a bottom and an outer surface adjacent to the crushed stone layer 200, but is formed at the top to allow rainwater to flow in.

A schematic cross-sectional view of a permeable rainwater gutter system to which an eco-friendly permeable concrete composition containing recycled aggregate according to an embodiment of the present invention is applied is shown in Figures 1 and 2.

First, in order to excavate the ground layer 500 to a certain depth, it can be performed using manpower using a shovel or an excavating machine using a bucket. At this time, in order to protect the infiltration ability of the ground layer, be careful not to compact the bottom surface of the excavated ground excessively. Additionally, in the case of ground with a risk of collapse, earthworks may be carried out as needed.

In addition, the sand layer 400 may be formed by stacking sand on the bottom surface of the ground layer 500 in order to protect the bottom surface of the excavated ground and prevent a decrease in penetration ability. At this time, the sand may preferably be river sand. Additionally, when the ground is sandy soil, the sand layer 400 may be omitted.

In addition, the non-woven layer 300 is applied at a certain thickness to the upper surface of the sand layer 400 and the excavated surface of the ground layer 500 to prevent soil from flowing into the crushed stone and at the same time prevent the ground from collapsing. It can be formed to surround the entire surface of the crushed stone layer 200, which will be described later. The type of the non-woven fabric layer 300 is not particularly limited as it is commonly used in the art, but for example, it can be made of polyester, polypropylene, etc.; Those with a permeability coefficient of 0.1 mm/sec or more can be preferably used.

In addition, the crushed stone layer 200 protects the infiltration surface and allows rainwater to stably penetrate into the ground, easily controlling the flow of rainwater, and forming an inner surface of the non-woven fabric layer 300 to facilitate water circulation. It can be formed by lamination and filling. The type of crushed stone that can be filled in the crushed stone layer 200 is not particularly limited as it is commonly used in the art, but for example, those having an average particle diameter of 20 to 30 mm can be used; It is better to stack and fill so that the porosity is 30 to 40%.

In addition, the permeable concrete rainwater gutter 100 is inserted into the crushed stone layer 200 so that its bottom and outer surface are adjacent to the crushed stone layer 200, but the top is open to allow rainwater to flow in.

More specifically, the pervious concrete rainwater gutter 100 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, and has a porosity of 13 to 28% and a permeability coefficient of 3 mm/sec or more. ; A grating (120) that is open at the top to allow rainwater to flow in, and is fixedly installed by hanging on the permeable concrete body (110); A first pipe 130 connected to one side of the permeable concrete body 110 and having an inclination so that the incoming rainwater can be collected by gravity. and is connected to the opposite direction of the one side portion, is formed in a direction that is offset from the central axis of the first pipe 130, and has an inclination so that rainwater collected in the permeable concrete body 110 can be discharged by gravity. One that includes a second pipe 140 connected at an angle can be preferably used.

First, the permeable concrete body 110 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, has a porosity of 13 to 28%, and has a permeability coefficient of 3 mm/sec or more; During rainfall, rainwater that flows directly from the top or flows in through the first pipe 130 is filtered and discharged into the ground so that it can stably infiltrate, thereby easily controlling the flow of rainwater and facilitating the circulation of water. It can effectively prevent depletion of groundwater. In addition, it can continuously maintain water permeability, achieve excellent strength and durability, and maintain uniform quality for a long period of time.

More specifically, the eco-friendly permeable concrete composition containing the recycled aggregate may preferably contain 65 to 85% by weight of recycled aggregate, 10 to 30% by weight of cement, and 1 to 10% by weight of water.

First, the recycled aggregate is manufactured by grinding waste concrete according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then an aggregate pretreatment step of removing fine powder and foreign substances attached to the surface of the aggregate; An acid treatment step of maximizing pores of the aggregate by immersing the aggregate for which the aggregate pretreatment has been completed in an aqueous hydrochloric acid solution to elute calcium chloride; And an accelerated carbonation step of improving the strength of the aggregate by immersing the acid-treated aggregate in an aqueous carbonate solution in which carbon dioxide is dissolved in water to recrystallize the calcium chloride remaining on the pore surface of the aggregate into high-purity calcium carbonate. A treatment method can be preferably used. As a result, not only can water permeability be further improved by further improving the porosity of the recycled aggregate, but it can also provide excellent miscibility within an eco-friendly permeable concrete composition and achieve excellent strength and durability improvement effects.

More specifically, the aggregate pretreatment step is to promote the ease of supply and demand of recycled aggregate and the spread of technology, and to improve the permeability and strength of eco-friendly permeable concrete compositions, by converting waste concrete into KS F 2573 (recycled aggregate for concrete). It can be performed by grinding according to the particle size specifications, producing aggregate, and then removing fine powder and foreign substances attached to the surface of the aggregate. At this time, the removal of fine powder and foreign substances attached to the surface of the aggregate can be performed by a conventional method commonly used in the art, for example, using washing water, a blower, etc.

Additionally, the acid treatment step may be performed by immersing the pre-treated aggregate in an aqueous hydrochloric acid solution to elute calcium chloride in order to maximize the pores of the aggregate.

In the case of waste concrete, calcium hydroxide reacts with carbon dioxide in the air for a long period of time, and carbonation progresses, so it contains a large amount of calcium carbonate. Accordingly, through the acid treatment step, the calcium carbonate component present on the surface and inside the waste concrete reacts with hydrochloric acid to produce calcium chloride, and this calcium chloride is eluted into an aqueous solution, thereby maximizing the pores of the aggregate.

At this time, the aqueous hydrochloric acid solution has a concentration of 2 to 5 N; The immersion may be performed at a temperature of 40 to 60 °C. Additionally, the acid-treated aggregate can be finished by washing with water and then drying. However, the present invention is not limited thereto.

In addition, in the accelerated carbonation step, in order to improve the strength of the aggregate with maximized pores, the acid-treated aggregate is immersed in an aqueous carbonate solution in which carbon dioxide is dissolved in water, and the calcium chloride remaining on the pore surface of the aggregate is converted into high-purity carbonate. This can be accomplished by recrystallization from calcium carbonate.

In addition, the accelerated carbonation step can reduce the alkali content of the recycled aggregate, preventing the alkaline aggregate reaction that causes expansion and cracking due to the additional alkali content (calcium hydroxide component) of the mortar attached to or contained in the recycled aggregate of waste concrete. can do.

In addition, the recycled aggregate further improves the strength of the aggregate by reinforcing the surface of the recycled aggregate, provides excellent miscibility in the eco-friendly permeable concrete composition, and further improves excellent strength, durability, water permeability, and filtration performance. In order to do this, it may further include the step of coating the surface of the aggregate on which the accelerated carbonation has been completed with a foaming performance-enhancing coating and then foaming and treating the surface.

At this time, the foaming performance-enhancing coating agent includes 100 parts by weight of poly(meth)acrylimide, 30 to 50 parts by weight of styrene butadiene rubber, 10 to 30 parts by weight of ethylene vinyl acetate, 1 to 10 parts by weight of iron hydroxide, and 1 to 10 parts by weight of organic acid. , can be preferably used containing 0.5 to 5 parts by weight of sodium bicarbonate, 0.5 to 5 parts by weight of a dispersant, and 50 to 100 parts by weight of a solvent.

First, the poly(meth)acrylimide is foamed on the surface of the recycled aggregate to provide excellent adhesion, strength reinforcement, chemical resistance, heat resistance, and durability to the recycled aggregate.

Hereinafter, the content of other components constituting the foamable performance-enhancing coating agent is based on 100 parts by weight of the poly(meth)acrylimide.

The styrene-butadiene rubber is foamed on the surface of the recycled aggregate to further improve excellent adhesion, elasticity, and strength reinforcing effects, provides excellent miscibility in eco-friendly permeable concrete compositions, and further improves excellent strength and durability improvement effects. .

The styrene butadiene rubber is preferably contained in the range of 30 to 50 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of the styrene butadiene rubber is too small, the improvement effect may be insufficient, and if the content of the styrene butadiene rubber is too high, price competitiveness may be reduced.

The ethylene vinyl acetate is foamed on the surface of the recycled aggregate to further improve the strength of the aggregate by reinforcing and coating the surface with excellent adhesion, strength reinforcing effect, and deformation prevention performance, and has excellent strength, heat resistance, and durability improvement effects in the eco-friendly permeable concrete composition. It functions to further improve.

The ethylene vinyl acetate is preferably contained in the range of 10 to 30 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of ethylene vinyl acetate is too small, the improvement effect may be insufficient, and if the content of ethylene vinyl acetate is too high, price competitiveness may be reduced.

The iron hydroxide not only reinforces the strength of the coating layer but also the recycled aggregate, and further improves the excellent strength, heat resistance, chemical resistance, salt damage resistance, neutralization resistance, and durability improvement effect in the eco-friendly permeable concrete composition.

The iron hydroxide powder having the shape of a chestnut cluster is used, which has the effect of further improving the above-described improvement effect compared to ordinary iron hydroxide powder or iron hydroxide powder having the shape of a rod. In particular, by providing a capillary effect, it provides a function to physically attract moisture and transfer it to the ground, which has the effect of greatly improving the water permeability and filtration performance of the permeable concrete body 110.

More specifically, the iron hydroxide powder having the chestnut shape is obtained by adding an Fe precursor compound to a concentration of 1 to 10 M in an aqueous solution of carbonyl diamide (CH ₄ N ₂ O) at a concentration of 1 to 10 M, and then adding cetyltrimethylammonium. Preparing a mixed solution by adding and mixing 0.001 to 0.005 mole of bromide; reacting the mixed solution at a temperature of 70 to 150° C. for 0.5 to 3 hours; and filtering and washing the reaction product, and then drying the reactant at a temperature of 40 to 80° C. for 1 to 10 hours to prepare iron hydroxide powder having a chestnut shape. there is.

At this time, the Fe precursor compound is a group consisting of Fe(NO ₃ ) ₃ , FeCl ₃ , FeC ₂ O ₄ , FeCl ₂ , FeBr ₂ , FeBr ₃ , FeI ₂ , FeI ₃ , Fe(NO ₃ ) ₂ and their hydrates. It may be one or more types selected from.

The iron hydroxide is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of iron hydroxide is too small, the improvement effect may be insufficient, and if the content of iron hydroxide is too high, price competitiveness may be reduced.

The organic acid reacts with the sodium bicarbonate in a solvent to generate carbon dioxide, which functions to foam the foamable performance-enhancing coating agent.

These organic acids are generally used in the art, as long as they are organic acids that react with sodium bicarbonate to generate carbon dioxide, and their types are not particularly limited. For example, citric acid, citric acid, malic acid, tartaric acid, fumaric acid, lactic acid, Adipic acid, etc. can be used.

The organic acid is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of the organic acid is too small, the improvement effect may be insufficient, and if the content of the organic acid is too high, the strength improvement effect of the aggregate may be reduced.

The sodium bicarbonate reacts with the organic acid in the solvent to generate carbon dioxide, which functions to foam the foamable performance-enhancing coating agent.

The sodium bicarbonate is preferably contained in the range of 0.5 to 5 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of sodium bicarbonate is too small, the improvement effect may be insufficient, and if the content of sodium bicarbonate is too high, the strength improvement effect of the aggregate may be reduced.

The dispersant can uniformly mix the foamable performance-enhancing coating to consistently achieve the performance of the coating layer, thereby further improving the effect of strengthening the strength of the aggregate and improving the durability of the composition.

These dispersants are commonly used in the art and are not particularly limited in type, but include, for example, surfactants, ammonium carbamate-based, ammonium carbonate-based, ammonium bicarbonate-based compounds, ethyl cellusolve, and methyl cellusolve. , ethylene glycol, etc. can be used.

More specifically, the dispersant is a mixture of sodium or potassium salt of polyoxyethylene alkyl ether sulfuric acid ester, N-methyl-morpholine-N-oxide, and sodium hexametal phosphate in a weight ratio of 1: 0.1 to 0.5: 0.1 to 0.5. By using it, not only can the above-described effects be further improved, but in particular, the excellent strength, chemical resistance, salt damage resistance, neutralization resistance, and durability improvement effects can be further improved within the eco-friendly permeable concrete composition.

In addition, the dispersant is a mixture of sodium or potassium salt of the polyoxyethylene alkyl ether sulfuric acid ester, N-methyl-morpholine-N-oxide, and sodium hexametal phosphate in a weight ratio of 1: 0.1 to 0.5: 0.1 to 0.5. , by further including hesperidin methyl chalcone in a weight ratio of 0.05 to 0.3, there is an effect of greatly improving chemical resistance, freeze-thaw resistance, and weather resistance.

The dispersant is preferably contained in the range of 0.5 to 5 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the content of the dispersant is too small, the improvement effect may be insufficient, and if the content of the dispersant is too high, the effect of improving the strength of the aggregate may be reduced.

The solvent functions to allow the foamable performance-enhancing coating agent to be uniformly mixed and foamed.

These solvents are commonly used in the art and are not particularly limited in type, but include, for example, water, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), and N-methyl-2-pyrrolidinone. (NMP), 2-butanone, 4-methyl-2-pentanone, methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol, ethylene glycol, etc. can be used.

More specifically, the above effect can be further improved by using a mixture of water, dimethyl sulfoxide (DMSO), and C1 to C4 alkyl alcohol in a weight ratio of 1: 0.2 to 0.7: 0.1 to 0.3 as the solvent. In addition, in particular, it has the effect of greatly improving the compressive strength improvement effect.

The solvent is preferably contained in the range of 50 to 100 parts by weight based on 100 parts by weight of the poly(meth)acrylimide. If the solvent content is too small, the improvement effect may be insufficient, and if the solvent content is too high, the strength improvement effect of the aggregate may be reduced.

In addition, the coating of the foamable performance-enhancing coating agent on the surface of the accelerated carbonation-completed aggregate is a method commonly used in the art, and the type is not particularly limited, but is performed, for example, by coating methods such as dipping and spraying. It can be.

Additionally, foaming of the foamable performance enhancing coating agent may be performed at a temperature of 150 to 210°C. More specifically, it is preferable to perform primary foaming at a temperature of 190 to 210°C for 1 to 3 hours and then perform secondary foaming at a temperature of 150 to 180°C for 3 to 8 hours. As a result, not only can the strength improvement effect of the excellent aggregate be maximized, but it also has the effect of greatly improving water permeability.

Considering water permeability performance, strength and durability, the recycled aggregate is preferably contained in the range of 65 to 85% by weight in the eco-friendly permeable concrete composition containing the recycled aggregate of the present invention.

Meanwhile, the cement undergoes a hydration reaction with water to induce setting and hardening of the eco-friendly permeable concrete composition containing the recycled aggregate of the present invention, thereby increasing internal density and increasing strength.

More specifically, the cement is suitable for the conditions of KS L 5201 (Portland Cement) and can be used having a fineness of 3,000 to 4,500 cm ² /g. However, the present invention is not limited thereto.

Considering water permeability performance and strength, the cement is preferably contained in an amount of 10 to 30% by weight in the eco-friendly permeable concrete composition containing recycled aggregate of the present invention.

In addition, the eco-friendly permeable concrete composition containing the recycled aggregate may further include 0.01 to 0.5% by weight of a high-performance water reducing agent. The high-performance water reducing agent evenly generates small bubbles in the concrete during construction, improves the fluidity of the composition, facilitates work, and improves watertightness, freeze-thaw resistance, chemical resistance, and durability.

These high-performance water reducing agents are commonly used in the art and are not particularly limited in type, but for example, naphthalene-type, melamine-type, polycarboxylic acid-type, amino sulfonic acid-type water reducing agents or mixtures thereof may be used. You can.

More specifically, the naphthalene-type water reducing agent includes modified lignin, alkylaryl sulfonic acid and active sustained polymer, polyalkylaryl sulfonic acid salt and reactive polymer, alkylaryl sulfonic acid salt high condensate, polypolymer containing sulfonic acid group carboxyl group, alkyl naphthalene sulfonic acid salt, and alkylaryl sulfonic acid salt. At least one selected from the group consisting of sulfonate modified lignin cocondensate, modified lignin, lignin derivative, alkylaryl sulfonate, and mixtures thereof can be used.

In addition, the melamine-type water reducing agent may be one or more selected from the group consisting of modified methylmelamine condensate, water-soluble special polymer compound, sulfonated melamine high condensate, and mixtures thereof.

In addition, representative polycarboxylic acid-type water reducing agents include copolymers containing unsaturated carboxylic acid monomers as a single component or salts thereof, such as poly(alkylene glycol)monoacrylate, poly(alkylene glycol)monomethacrylate, and anhydrous. One or more types selected from the group consisting of copolymers of maleic acid and styrene, copolymers of acrylate or methacrylate, copolymers derived from monomers copolymerizable with these monomers, and mixtures thereof can be used.

In addition, representative examples of the amino sulfonic acid type water reducing agent may be one or more selected from the group consisting of aromatic amino sulfonic acid polymer compounds, aromatic polymer condensates, lignin sulfonic acid derivatives, and mixtures thereof.

In addition, the eco-friendly permeable concrete composition containing the recycled aggregate further contains 0.1 to 5% by weight of a performance improver, which has the effect of further improving excellent strength, durability, permeability performance, and filtration performance.

More specifically, the performance improver includes 100 parts by weight of red clay, 30 to 70 parts by weight of metakaolin, 10 to 30 parts by weight of zeolite, 5 to 15 parts by weight of styrenebutadiene rubber, 1 to 10 parts by weight of fluorocarbon resin, and the following formula (1) It can be preferably used as containing 0.1 to 5 parts by weight of piperonyl acid and 0.1 to 5 parts by weight of ursolic acid.

[Formula 1]

First, the red clay contains a large amount of calcium carbonate (CaCO ₃ ) and has a cohesive strength that does not break easily, so it functions to bind cement more strongly when water is added. At the same time, due to the physical properties of the red clay itself, it absorbs harmful substances and odors, continuously emits far-infrared rays, and not only acts as an absorption suppressor to reduce the emission of toxic substances, but also has an excellent humidity control ability, so when the outside is humid, It has the property of absorbing moisture and then releasing moisture when the outside dries. It has excellent antibacterial and deodorizing performance, and has the effect of further improving excellent strength, durability, water permeability, and filtration performance.

Hereinafter, the content of other components constituting the performance improver is based on 100 parts by weight of the red clay.

The metakaolin contains a large amount of amorphous glass phase, and reacts with calcium hydroxide generated by the hydration reaction of cement to form a three-dimensional network structure of Si-O-Al, increases adhesion, develops excellent strength, and neutralizes And it has the function of improving durability by increasing resistance to freezing and thawing.

The metakaolin is preferably contained in the range of 30 to 70 parts by weight based on 100 parts by weight of the red clay. If the content of metakaolin is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of metakaolin is too high, there is a problem that fluidity and workability may be reduced, or water permeability may be reduced. .

The zeolite has a porous structure, which improves water permeability and improves filtration performance by adsorbing contaminants, deodorizing power, and absorbing power.

The zeolite is preferably contained in the range of 10 to 30 parts by weight based on 100 parts by weight of the red clay. If the content of the zeolite is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the zeolite is too high, there is a problem that fluidity and workability may be reduced, or water permeability may be reduced.

The styrene-butadiene rubber has an increased bonding force, thereby improving strength, chemical resistance, and durability.

The styrene butadiene rubber is preferably contained in the range of 5 to 15 parts by weight based on 100 parts by weight of the red clay. If the content of the styrene butadiene rubber is too small, the improvement effect may be insufficient, and if the content of the styrene butadiene rubber is too high, water permeability may be reduced.

The fluorocarbon resin has the effect of further improving excellent strength, durability, heat resistance, chemical resistance, water permeability, and filtration performance.

The fluorocarbon resin is selected from the group consisting of polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoropropyl vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, and mixtures thereof. One or more types can be preferably used.

The fluorocarbon resin is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the red clay. If the content of the fluorocarbon resin is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the fluorocarbon resin is too high, there is a problem that fluidity and constructability may be reduced.

Piperonylic acid, represented by Formula 1, has the effect of greatly improving durability such as chemical resistance, freeze-thaw resistance, water permeability, and filtration performance.

Piperonylic acid represented by Formula 1 is preferably contained in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the red clay. If the content of piperonic acid represented by Formula 1 is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of piperonic acid represented by Formula 1 is too high, strength performance may be reduced. There are possible problems.

The ursolic acid, together with piperonic acid represented by Formula 1, has the effect of greatly improving durability such as chemical resistance, freeze-thaw resistance, water permeability, and filtration performance.

The above-mentioned effect can be further improved by using a mixture of piperonic acid and ursolic acid represented by Formula 1 in a weight ratio of 1:0.5 to 0.7, respectively.

The ursolic acid is preferably contained in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the red clay. If the content of ursolic acid is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of ursolic acid is too high, there is a problem that strength performance may be reduced.

Meanwhile, the performance improver further includes 0.01 to 0.5 parts by weight of latent powder based on 100 parts by weight of the red clay, which has the effect of further improving durability of chemical resistance and freeze-thaw resistance.

More specifically, the bran powder includes a pretreatment step of removing foreign substances in the bran powder and selecting excellent coarse, black bran powder; After pre-cooling the sleep powder that has gone through the pretreatment step at -40 to 50°C for 4 to 7 hours, the chamber is operated at -70 to 80°C for 1 to 2 hours, and the chamber is heated at 4 to 5 mbar (mbar) for 2 to 3 hours. ), followed by vacuum treatment at a pressure of 20 to 30° C., followed by freeze-drying; and a powdering step of powdering the latent powder that has undergone the freeze-drying step to a size of 80 to 140 mesh.

Meanwhile, the grating 120 is open at the top to allow rainwater to flow in, and can be fixedly installed by hanging on the permeable concrete body 110. The grating 120 may preferably be manufactured in the form of a grid with a penetration space sufficient to prevent fallen leaves, cigarette butts, and various types of waste from entering. Additionally, a highly durable metal material can be preferably used. As a result, damage to the permeable concrete body can be prevented even when external pressure is applied due to pedestrians walking or passing vehicles.

Additionally, during rainfall, rainwater may flow into the permeable concrete body 110 through the first pipe 130. At this time, the first pipe 130 is connected to one side of the permeable concrete body 110 so that the incoming rainwater can flow in and be collected by gravity, and is preferably connected at an angle with an inclination in the direction of gravity.

Additionally, during rainfall, rainwater that exceeds the throughput capacity of the pervious concrete body 110 flows out from the pervious concrete body 110 through the second pipe 140. At this time, the second pipe 140 is connected to the opposite direction of one side of the pervious concrete body 110 so that the rainwater collected in the pervious concrete body 110 can be discharged by gravity, and the first pipe ( Like 130), it is desirable to be connected obliquely with a slope in the direction of gravity.

At this time, the second pipe 140 is formed in a direction that is offset from the central axis of the first pipe 130, and is designed so that the flow of rainwater can collide with the inner wall of the permeable concrete body 110 to form a vortex. , It has the effect of further improving water permeability, controlling rainwater flow more easily, and making water circulation more smooth.

According to an infiltration type rainwater gutter system using an eco-friendly permeable concrete composition containing recycled aggregate according to an embodiment of the present invention; Rainwater collected and transported during rainfall is filtered and discharged to the outside through the porous pores of the permeable rainwater catchment system of the present invention, which has the effect of allowing rainwater to stably infiltrate into the ground. As a result, rainwater flow can be easily controlled, water circulation can be facilitated, and depletion of groundwater can be effectively prevented. In addition, it is eco-friendly by maximizing the recycling effect of recycled aggregate, which is an industrial by-product, and effectively prevents pores from being easily clogged due to the inflow of soil, suspended matter, and contaminants, thereby maintaining water permeability on a continuous basis. At the same time, it has the effect of realizing excellent strength and durability and maintaining consistent quality.

Above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. This is possible.

[Comparative Manufacturing Example 1]

Preparation of recycled aggregate

Waste concrete was ground according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then fine powder and foreign substances attached to the surface of the aggregate were removed using a blower. As a result, coarse aggregate with a specific gravity of 2.52, an absorption rate of 2.71%, and a granulation rate of 6.36 was prepared.

[Production Example 1-1]

Preparation of recycled aggregate

Waste concrete was ground according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and fine powder and foreign substances attached to the surface of the aggregate were removed using a blower to pre-treat the aggregate. As a result, coarse aggregate with a specific gravity of 2.52, an absorption rate of 2.71%, and a granulation rate of 6.36 was prepared.

The acid treatment was completed by immersing the aggregate on which the aggregate pretreatment was completed in an aqueous solution of hydrochloric acid with a concentration of 2.5 N maintained at a temperature of 50° C., washing it with distilled water three times, and then drying it with hot air.

The aggregate after the acid treatment was immersed in an aqueous carbonate solution in which carbon dioxide was dissolved in water, thereby undergoing accelerated carbonation.

[Production Examples 1-2 to 1-4]

Preparation of recycled aggregate

Regarding the aggregate prepared in the same way as that prepared in Preparation Example 1, that is, the surface of the accelerated carbonation-complete aggregate was coated with a foamable performance-enhancing coating agent containing the ingredients and contents in Table 1 below, and then 1.5% at a temperature of 200 ° C. After performing the first foaming for 5 hours, the surface was treated by performing the second foaming at a temperature of 170°C for 5 hours.

Classification (weight) Manufacturing Example 1-2 Manufacturing Example 1-3 Manufacturing Example 1-4 Poly(meth)acrylimide - 100 100 Styrenebutadiene rubber 100 35 35 ethylene vinyl acetate 18 18 18 iron hydroxide - 7
[Production Example 2-1] 7
[Production Example 2-2] Organic acid_citric acid 5 5 5 sodium bicarbonate 2.5 2.5 2.5 Dispersant_
Potassium salt of polyoxyethylene alkyl ether sulfuric acid ester 1.5 One One Dispersant_
N-methyl-morpholine-N-oxide - 0.25 0.25 Dispersant_Sodium hexametal phosphate - 0.25 0.25 Solvent_Water 75 50 50 Solvent_DMSO - 15 15 Solvent_Methanol - 10 10

[Production Example 2-1]

Preparation of iron hydroxide powder having a rod shape

FeCl ₃ ·6H ₂ O at a concentration of 3M was added to deionized water and stirred until completely dissolved. Afterwards, it was reacted at a temperature of 60°C for 12 hours. When the reaction was completed, it was sufficiently cooled at room temperature, and then filtered and washed using a vacuum pump. Iron hydroxide powder having a rod shape was prepared by drying in a hot air dryer at 60°C for 8 hours.

[Production Example 2-2]

Preparation of iron hydroxide powder with chestnut shape

Carbonyl diamide (CH ₄ N ₂ O) at a concentration of 3M was added to distilled water and stirred until completely dissolved. Afterwards, FeCl ₃ ·6H ₂ O at a concentration of 3M was added and stirred until completely dissolved. After adding 0.002 mole of cetyltrimethylammonium bromide, the temperature was raised to 90°C and reaction was performed for 3 hours. When the reaction was completed, it was sufficiently cooled at room temperature, and then filtered and washed using a vacuum pump. Iron hydroxide powder was prepared by drying in a hot air dryer at 60°C for 8 hours.

[Production Example 3]

Preparation of ginseng powder

Mold-contaminated pollutants are removed, and foreign matter on the pollack is removed with the wind generated from the blower to select coarse, black, excellent pollack. After pre-cooling the selected pollack at -45°C for 6 hours, It was frozen by operating the chamber at -75°C for 2 hours, vacuumed at a pressure of 5 mbar (mbar) for 2 hours, and then dried at above 25°C, thereby freeze-drying. The bran powder that went through the freeze-drying step was pulverized to a size of 100 mesh using a grinder to prepare bran powder.

[Examples and Comparative Examples]

An eco-friendly permeable concrete composition containing recycled aggregate and a comparative composition were prepared by mixing recycled aggregate, cement, water, performance improver, and high-performance water reducing agent mixed with the ingredients and contents as shown in Table 2 below.

Classification (weight%) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example recycled aggregate 73.3
[Production Example 1-1] 73.3
[Production Example 1-2] 73.3
[Production Example 1-3] 73.3
[Production Example 1-4] 72.3
[Production Example 1-4] 72.3
[Production Example 1-4] 73.3
[comparison
Manufacturing Example 1] cement 21.0 21.0 21.0 21.0 21.0 21.0 21.0 water 5.5 5.5 5.5 5.5 5.5 5.5 5.5 High performance water reducing agent_
Polycarboxylic acid type water reducing agent 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Performance improver - - - - 1.0 1.0 - weight part ocher - - - - 100 100 - metakaolin - - - - 55 55 - zeolite - - - - 15 15 - Styrenebutadiene rubber - - - - 10 10 - Tetrafluoroethylene-perfluoropropyl vinyl ether copolymer - - - - 7 7 - Piperonilic acid
[Formula 1] - - - - 3 2 - Ursolic acid - - - - One 2 - sleep powder - - - - - 0.1
[Production Example 3] -

<Test example>

The experiments below show experimental results comparing the characteristics of the examples according to the present invention and the comparative examples so that the characteristics of the examples according to the present invention can be more easily understood.

First, using an eco-friendly permeable concrete composition containing recycled aggregate and a comparative composition, a test specimen was produced according to the 'Method for producing a specimen of porous concrete' of the Concrete Research Committee of the Japan Concrete Engineering Institute (JCI).

Afterwards, the quality characteristics of the manufactured test specimen were evaluated, and the results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example Porosity (%) 17.8 17.7 17.8 17.8 17.9 17.8 17.4 Permeability coefficient (mm/sec) 8.5 9.2 9.7 9.7 10.1 10.3 6.8 Compressive strength (MPa) 27 28 30 32 35 36 19 Bending strength (MPa) 4.3 4.6 5.0 5.2 5.4 5.3 3.2 Freeze-thaw resistance (%)_KS F 2456 81 83 91 93 96 97 52 Rust protection rate (%)_KS F 2561 88 90 94 95 95 96 83 Chemical resistance ⁽¹⁾ Great Great Great Great Great Great commonly ⁽¹⁾ Chemical resistance: Mass loss rate after immersion in 1% sulfuric acid solution for 180 days
(Standard: 15% by weight or less is indicated as average, and 9% by weight or less is indicated as excellent.)

As shown in Table 3, the eco-friendly permeable concrete composition containing recycled aggregate prepared in the examples of the present invention has a high permeability coefficient, excellent compressive strength, and flexural strength compared to similar porosity compared to the comparative composition prepared in the comparative example. , it was confirmed that it exhibited freeze-thaw resistance, rust prevention rate, and chemical resistance.

As described above, a person skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, all embodiments described above should be understood as illustrative and not restrictive. The scope of the present invention should be construed as including all changes or modified forms derived from the meaning and scope of the claims described below and their equivalent concepts rather than the detailed description above.

100: Pervious concrete rain gutter
110: pervious concrete body 120: grating
130: first pipe 140: second pipe
200: crushed stone layer 300: non-woven layer
400: sand layer 500: ground layer

Claims (5)

Ground layer excavated to a certain depth (500); A sand layer 400 formed by stacking on the bottom surface of the ground layer 500; A non-woven fabric layer (300) applied to a certain thickness on the upper surface of the sand layer (400) and the excavated surface of the ground layer (500); A crushed stone layer (200) formed by lamination and filling the inner surface of the non-woven fabric layer (300); Infiltration-type rainwater including a permeable concrete rainwater gutter 100 that is inserted into the crushed stone layer 200 and has a bottom and an outer surface adjacent to the crushed stone layer 200, but is formed at the top to allow rainwater to flow in. As a receiving system;
The pervious concrete rain gutter 100 is manufactured using an eco-friendly pervious concrete composition containing recycled aggregate, and has a porosity of 13 to 28% and a permeability coefficient of 3 mm/sec or more. A grating (120) that is open at the top to allow rainwater to flow in, and is fixedly installed by hanging on the permeable concrete body (110); A first pipe 130 connected to one side of the permeable concrete body 110 and having an inclination so that the incoming rainwater can be collected by gravity. and is connected to the opposite direction of the one side portion, is formed in a direction that is offset from the central axis of the first pipe 130, and has an inclination so that rainwater collected in the permeable concrete body 110 can be discharged by gravity. It includes a second pipe 140 connected obliquely;
The eco-friendly permeable concrete composition containing the recycled aggregate includes 65 to 85% by weight of recycled aggregate, 10 to 30% by weight of cement, and 1 to 10% by weight of water;
The recycled aggregate includes an aggregate pretreatment step of grinding waste concrete according to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to produce aggregate, and then removing fine powder and foreign substances attached to the surface of the aggregate; An acid treatment step of maximizing pores of the aggregate by immersing the aggregate for which the aggregate pretreatment has been completed in an aqueous hydrochloric acid solution to elute calcium chloride; An accelerated carbonation step of improving the strength of the aggregate by immersing the acid-treated aggregate in an aqueous carbonate solution in which carbon dioxide is dissolved in water to recrystallize the calcium chloride remaining on the surface of the pores of the aggregate into high-purity calcium carbonate; The surface of the accelerated carbonation-completed aggregate is coated with a foaming performance-enhancing coating, and then foamed to treat the surface;
The foamable performance-enhancing coating agent includes 100 parts by weight of poly(meth)acrylimide, 30 to 50 parts by weight of styrene butadiene rubber, 10 to 30 parts by weight of ethylene vinyl acetate, 1 to 10 parts by weight of iron hydroxide, 1 to 10 parts by weight of organic acid, and carbonic acid. A permeable rainwater gutter system applied with an eco-friendly permeable concrete composition containing recycled aggregate, comprising 0.5 to 5 parts by weight of sodium hydrogen, 0.5 to 5 parts by weight of a dispersant, and 50 to 100 parts by weight of a solvent.
delete According to paragraph 1,
The dispersant is a mixture of sodium or potassium salt of polyoxyethylene alkyl ether sulfuric acid ester, N-methyl-morpholine-N-oxide and sodium hexametal phosphate in a weight ratio of 1:0.1 to 0.5:0.1 to 0.5;
The solvent is water, dimethyl sulfoxide (DMSO), and C1 to C4 alkyl alcohol mixed in a weight ratio of 1: 0.2 to 0.7: 0.1 to 0.3. A permeable concrete composition containing an eco-friendly permeable concrete composition containing recycled aggregate is applied. Rainwater guttering system.
According to paragraph 1,
The iron hydroxide is an iron hydroxide powder having a chestnut shape;
The iron hydroxide powder having the shape of a chestnut is prepared by adding an Fe precursor compound to an aqueous solution of carbonyl diamide (CH ₄ N ₂ O) at a concentration of 1 to 10 M to a concentration of 1 to 10 M, and then adding 0.001 to 0.001 to 0.001 of cetyltrimethylammonium bromide. Preparing a mixed solution by adding and mixing 0.005 mole; reacting the mixed solution at a temperature of 70 to 150° C. for 0.5 to 3 hours; and filtering and washing the reactant upon completion of the reaction and then drying it at a temperature of 40 to 80° C. for 1 to 10 hours to prepare iron hydroxide powder having the shape of a chestnut. A permeable rainwater gutter system using an eco-friendly permeable concrete composition containing aggregate.
According to paragraph 1,
The eco-friendly permeable concrete composition containing the recycled aggregate further includes 0.1 to 5% by weight of a performance improver;
The performance improver includes 100 parts by weight of red clay, 30 to 70 parts by weight of metakaolin, 10 to 30 parts by weight of zeolite, 5 to 15 parts by weight of styrene butadiene rubber, 1 to 10 parts by weight of fluorocarbon resin, and pipette represented by the following formula (1). A permeable rainwater gutter system applied with an eco-friendly permeable concrete composition containing recycled aggregate, characterized in that it contains 0.1 to 5 parts by weight of piperonylic acid and 0.1 to 5 parts by weight of ursolic acid.
[Formula 1]