KR100510318B1 - Pavement for using second reproduction aggregate and fabrication method thereof - Google Patents

Abstract

The present invention relates to recycled color pitched concrete suitable for pavement such as sidewalks, bicycle roads, and a method of manufacturing the same, and crushing the waste concrete to the particle size specifications of KS F 2573 (recycled aggregate for concrete), and to the surface of the aggregate through the aeration tank A production and pre-wetting process of recycled aggregate which removes adhered fine powder and also sprays water on the aggregate surface to secure workability in order to adjust the high absorption rate of the degraded aggregate prior to blending; In the production and pre-wetting process of the recycled aggregates, 280-350 kg / m2 of cement and 5-15% of cement substitutes are mixed into pre-wet recycled aggregates in order to effectively remove fine particles from the surface of the recycled aggregates and to manage the absorption rate. Cement input process: regenerated aggregate, water, Process for adding mixed materials, etc .: After the process of adding recycled aggregates, water, and mixed materials, the completed permeable concrete is laid, and then, to fully dry and secure the durability of the product, to secure the bonding strength and the color expression of the upper surface. It consists of a water-soluble epoxy resin coating process for spraying a water-soluble epoxy resin in order to pre-treat some recycled aggregates By making it possible to use as raw materials for packaging materials, it is possible to maximize the efficient resource management and recycling effects by establishing a smooth distribution network of the produced recycled aggregates, and to expect more efficient technology ripple effects. In addition, by using recycled aggregates, silica fume can be used as a substitute for cement to compensate for the strength reduction, and a cost-effective contraction expansion agent can be used to prevent cracking due to initial dry shrinkage, which is a problem of permeable concrete. Mixing has the effect of bringing stability of the product.

Description

 Color-permeable concrete using two recycled aggregates and its manufacturing method {Pavement for using second reproduction aggregate and fabrication method

The present invention relates to an initial crack prevention color pitched concrete utilizing recycled aggregates, and more particularly, to a color-permeable concrete using a recycled aggregate of two types suitable for pavement such as sidewalks, bicycle roads, and the like.

first. Considering the technical aspects,

In the case of general industrial waste, a great deal of waste has been recycled through continuous research on reprocessing technology and recycling system.However, construction waste is a huge amount of about 40% of total industrial waste per year. Reprocessing technologies such as sorting, screening, and recycling have not been developed and distributed, and the treatment system is inadequate. Therefore, the construction by-products generated during construction work are mainly buried.

However, such reclamation will become increasingly impossible due to the severe environmental pollution and the lack of placenta in the treatment plant, and it is not only a waste of national resources to dispose of huge amounts of construction by-products. It may cause contamination.

The amount of construction waste material in our country is more than 50% of the landfilled waste until the end of the landfill, which is a large amount of recycled waste ascon, earth and sand concrete.

In addition, the Recycling Guidelines for Construction Waste Disposal Companies requires that 60% of the soil produced, 50% of concrete masses, and 35% of waste ascones be recycled by 1998.

In particular, the Korea Industrial Standard, which is the quality standard for recycled aggregates that was first processed by crushing, separating and sorting double concrete lumps and waste ascons, was enacted in 1999. There is an urgent need for technological enhancement in strengthening international competitiveness, recycling resources, and preserving the environment of resources.

second. Considering the economic and industrial aspects,

Recently, more than 90% of landfills are expected to be completed when landfilling is completed.However, securing landfills is an immediate problem, but it is difficult to secure new landfills and the cost burden will be enormous. Will also increase.

This situation is far behind in advanced countries where active measures for recycling have been established, and huge resources are wasted. In addition, the current shortage of final disposal sites is becoming more and more important in Korea.

It is possible to stabilize the construction cost relatively through economic income gained by recycling the construction waste that has to be disposed of at landfill costs, and to reduce the size of the landfill to bury the waste by recycling construction waste. We anticipate that the company will be able to benefit from the economic losses.

Therefore, by inducing on-site recycling of construction wastes, it is possible to reduce the cost of carrying out waste on site, and by supplying low-cost aggregates, it can contribute to the national economic cost reduction by reducing construction costs and forming a new construction waste recycling goods market. I think you can.

From an environmental point of view, it can not only save resources but also prevent the environmental damage caused by landfill and illegal dumping of construction waste, and increase the supply of aggregate in response to the lack of aggregate resources. Recycling will prevent supply instability of finite natural resources and will be expected in terms of resource and national energy savings.

third. Considering the social and cultural aspects,

The government enacted the Act on the Promotion of Saving and Recycling Resources in 1993 based on social awareness of the necessity of proper disposal and recycling of construction waste. Recycling is mandated by designating concrete, concrete and asphalt concrete lumps as designated by-products, and promoting the recycling of construction wastes by setting a target rate for construction waste recycling by year.

Therefore, through the development of products using recycled aggregates with national quality standards among construction wastes, not only saving resources, but also preventing environmental damage caused by landfilling and illegal dumping of construction wastes, and increasing supply of aggregates in response to lack of aggregate resources. In the same socio-cultural aspect, there is an urgent need to conserve the environment from the destruction or destruction of nature by preventing the exhaustion of limited natural resources and effectively maintaining natural resources.

In general, permeable asphalt and permeable concrete have been used for pavement of sidewalks and bicycle roads, but permeable asphalt is often melted by sunlight and the pores are blocked so that the permeability and functionality become worse and the strength of the asphalt itself is deteriorated. Repeatedly weakened as the road was easily damaged and had problems such as.

Therefore, various types of concrete having a permeability have been proposed in view of the above problems of the permeable asphalt.

As an example, Japanese Patent Application Laid-Open No. 60-215565, a method for producing a cement concrete construct having high permeability, describes 300 to 400 kg of portland cement and 1 weight of cement per cubic meter of cement concrete mixture. It is composed of 0.005 to 0.1 parts by weight of binder and 0.35 to 0.45 parts by weight of water and aggregates constituting the remainder, wherein the aggregate is 50 to 100% of the weight ratio of 5 mm sieve, and the weight percentage of water to 2.5 mm sieve is water. 8 to 25% for the cement / weight ratio of 0.35 to 0.43, 0 to 18% for the water / cement weight ratio of more than 0.43 and less than 0.45, and a weight distribution of 1.2 mm to 0 to 6% It is proposed a method of making permeable cement concrete structures by pouring or casting and hardening the mixture obtained by training the cement concrete mixture.

In addition, described in the domestic patent publication (Publication No. 1990-4390, color pitched concrete), water 116 kg / ㎥, cement 292 kg / ㎥, fine aggregate 87 ㎏ / ㎥, coarse aggregate 1690 ㎏ / ㎥, pigment 7.0 ㎏ / ㎥, admixture 0.58㎏ / ㎥ and the maximum aggregate size of coarse aggregate is 13mm and the solidity permeability coefficient is 10 × 10-2㎝ / It is proposed a color-permeable concrete, characterized in that more than sec and the design reference strength based on the particle size range is 100kg / ㎠ ~ 300㎏ / ㎠. Such pitched concrete helps water to grow by supplying water to street trees by gaps between aggregates and aggregates, and helps in the growth of trees, and inflows of water into urban rivers as rainwater falls during the rainy season is thrown into the ground. It has the effect of delaying the amount of water, which helps to prevent flooding of rivers, etc. Also, the rainwater does not flow on the sidewalk due to the pitching of water, which is convenient for traffic. The supply of is expanding. And the most important thing in permeable concrete is to improve the strength of concrete with porosity which increases the permeability of concrete. Good porosity of concrete improves the permeability of rainwater, and in order to improve such porosity, it is good to increase the voids in aggregate and aggregate within a range that does not lower the strength of concrete. The reason for this is that if the pore is small, the permeability falls, and water is prevented from falling out due to an impurity between the aggregate and the aggregate or being blocked by soil, sand, or the like, thereby reducing the permeability.

Therefore, the present invention has been proposed to solve the problems of the prior art according to the recycling of recycled aggregate, the purpose of the present invention was conventionally crushed to a certain size (about 30cm) of the recycled aggregate was used as a backfill of the retaining wall, The amount is very small, and most of them are used in landfills such as reclaimed land or dumped in landfills, so they can solve large problems in terms of resource recycling or environmental pollution and maintain permeability and strength without using any fine aggregates. It is possible to maintain the strength suitable for the pavement, bicycle road pavement, good flatness of the paved surface as well as to provide a color pitched concrete using the second recycled aggregate to reduce the installation cost and its manufacturing method will be.

In addition, another object of the present invention is that the sidewalks and bicycle roads paved by the color pitched concrete is not affected by the bending strength of the concrete even if the auxiliary base is damaged, can be produced by a simple batching plant when producing the pitched concrete, the maximum stability Can be produced according to the load strength required by the pavement, and it is possible to reduce the production cost and construction cost by increasing the strength by compacting by the roller and recycling construction waste causing environmental problems.

The present invention for achieving the above object, by grinding the waste concrete to the particle size specifications of KS F 2573 (recycled aggregate for concrete) to remove the fine powder attached to the aggregate surface through the aeration tank, and also deteriorated prior to compounding A production and pre-wetting process of recycled aggregates to ensure workability by watering the aggregate surface in order to adjust the high absorption rate of the aggregates; In the production and pre-wetting process of the recycled aggregates, 280-350 kg / m2 of cement and 5-15% of cement substitutes are mixed into pre-wet recycled aggregates in order to effectively remove fine particles from the surface of the recycled aggregates and to manage the absorption rate. Cement input process: regenerated aggregate, water, Process of adding mixed materials and the like: After the process of adding recycled aggregate, water, and mixed materials, the completed permeable concrete is laid, and then, it is completely dried to secure the bonding strength and color expression of the upper surface to ensure the durability of the product. In order to spray the water-soluble epoxy-based resin is characterized in that made of a water-soluble epoxy resin coating process.

In addition, the present invention is characterized by the configuration of the color pitched concrete produced through the above process.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the present invention crushes construction waste and classifies it by particle size, and checks the particle size standard of KS F 2573 (recycled aggregate for concrete) by inspecting the absolute dry specific gravity, water absorption rate, Los angeles wear rate, washing loss amount and the like. After that, it was studied that new materials, cement, pigment, admixture, silica fume (strength reinforcing agent), and shrinkage compensating expansion agent can be used in combination with other permeable concrete to give substantially the same quality or higher. Finally, the present invention was proposed.

In recycled aggregates, aged cement accounts for 20-40% of the aggregate, but is generally superior to the quality of lightweight aggregates.

Therefore, the waste concrete is ground to a particle size specification of KS F 2573 (concrete recycled aggregate) and the fine powder adhering to the aggregate surface is removed through an aeration tank to adjust the high absorption rate of the degraded aggregate prior to blending. The process of securing water workability by spraying water on the surface of the aggregate is selected as the quality inspection for the recycled aggregate, and if it is classified and used according to the use, it can serve as a good color-permeable concrete aggregate. When the surface yield is adjusted and used for road pavement, etc., it can be used for the surface layer of paving concrete.

In addition, since the water absorption rate and specific gravity of concrete vary according to the amount of aged cement included in the recycled aggregate, it is difficult to maintain the desired uniform concrete quality when combined with the water-cement ratio as in general concrete. As low-slump road pavement concrete with 25-40% is not sensitive to slump change according to the unit quantity, recycled aggregate is the most efficient and economical way to recycle as aggregate for sidewalk and bicycle road pavement.

In particular, pavement materials that constitute the main road and roadway are impervious to sidewalk blocks, asphalt concrete, cement concrete, etc., and therefore directly discharge rainwater to rivers and rivers through drains in the pavement. The spilled rainwater is not only causing flooding of rivers and rivers due to recent urbanization, but also adversely affecting serious urban and natural ecosystems such as depletion of groundwater, destruction of underground ecosystems, and slowed tree growth. However, the more serious problem is the rapid increase in population and urbanization, which leads to the increase of impervious pavement area, which accelerates the destruction of urban environment and natural ecosystem.

From this point of view, the color pitched concrete using recycled aggregate is a permeable concrete product mainly used for sidewalks, bicycle roads, park walks and parking lots, using recycled aggregates produced by recycling construction wastes. It is a packaging product with the function of inducing and penetrating into the ground, and using recycled aggregates, which not only contributes to the preservation of the natural environment, but also revives the national policy, wastes valuable national resources, reduces costs in the construction industry, and recycles resources. It is a profitable product.

The present invention relates to a manufacturing method and packaging technology of the color permeable concrete using recycled aggregates, the color permeable concrete using the conventional recycled aggregates 2,3 kinds of recycled aggregates prescribed in KS F 2573 (recycled aggregates for concrete) When the wear rate of waste concrete aggregate is more than 40%, general aggregate is used within 50% range. Aging concrete buried in waste concrete aggregate is weak in durability, so it is adsorbed by adding polymer or emulsified asphalt. It must be strengthened. At this time, the polymer uses water-soluble acrylic resin, EVA, water-soluble epoxy, SBR latex, etc. It is a comprehensive recycling product using 25mm and 8mm recycled aggregate to maintain consistency of quality standards and aggregate quality for color permeable concrete. It is about the method of manufacturing the reinforcement of strength and the increase of the coefficient of permeability, which are the problems of the conventional color permeable concrete, by the selective use of recycled aggregate and the adjustment of the surface yield. The color permeable concrete using recycled aggregate currently distributed is very small, and the use of recycled aggregates is very small. 8 mm aggregates are used throughout the country, and the existing color permeable concrete has the most permeability problems due to the strength of aggregates. It appears to be a weak problem.

The present invention uses the recycled aggregates prescribed in the Korean Industrial Standards for aggregates of color permeable concrete, and ensures the stability of the aggregates, and recycled aggregates specified in KS F 2573 (recycled aggregates for concrete) having a particle size range of 25 mm and 13 mm or less. Quality of the aggregates (sand, stone powder, etc.) that affect the permeability by applying the smoothness of aggregate supply and the adjustment of the recently changed color permeable concrete aggregate size from 2.5mm to 13mm To improve the stability and to improve the concrete quality by using recycled aggregates selected aggregates.

The present invention aims at facilitating supply and distribution of technology by utilizing general particle size distribution of recycled aggregates produced on the basis of recycled aggregates specified in KS F 2573 (concrete recycled aggregates) of 25 mm and 13 mm or less. It is to propose a method of manufacturing color-permeable concrete that secures the durability and quality homogeneity of the product by accepting the technology of adjusting the maximum dimension of aggregate to 2.5-13mm for the improvement of color-permeable concrete permeability and strength. In addition, in order to secure the stability of aggregates most problematic in color-permeable concrete, the surface of the aggregates using the aeration tank applied for the removal of fine powder attached to the aggregate surface and cracks due to the absorption rate through prewetting during mixing of the aggregates It is intended to promote the quality stability of permeable concrete by using 5-15% silica fume of cement in order to increase the strength when mixing with other products.

The present invention is crushed from the concrete ingots selected from the concrete structure and the surface grinding powder is removed from the aeration tank and produced KS F 2573 (recycled aggregate for concrete) with an absorption rate of 5% or less, a specific gravity of 2.2 or more and a wear rate of 40% or less. It is a method of manufacturing color pitched cement concrete for sidewalks and bicycle roads by using high-quality recycled aggregates as specified in the above, and mixing water, cement, pigments and admixtures, silica fume, a high fluidizing agent, and an expanding agent.

In the present invention, the particle size distribution of aggregate is 13% at 100mm, 90-100% at 10mm, and 40 to 80% at # 4 with the color pitched concrete for sidewalks, bicycle roads, squares and parking lots using two kinds of recycled aggregates. It has a particle size distribution that passes 0-10% at # 10 and 0-5% at # 40, and has 5% or less absorption rate, 2.2 or more specific gravity, 40% or less wear rate, and 55% or more particle shape determination performance rate. It relates to the color permeable concrete using aggregates. Especially, it has strength suitable for paving sidewalks, bicycle paths, walkways, plazas and parking lots. It is to solve the problems of concrete and delays water 90 ~ 140㎏ / ㎥, cement 280 ～ 350㎏ / ㎥, 13-2.5mm aggregate 1550 ～ 1920㎏ / ㎥, pigment 5 ~ 40㎏ / ㎥ Pitcher is mixed with less than 0.3% of cement usage Number of 1 × 10-2㎝ / sec or more and it is designed based on the intensity of a color to be a water-permeable concrete 150 ~ 240㎏ / ㎠. In addition, in the process of injecting silica fume to enhance strength, as the mixing rate of silica fume increases, the compressive strength of concrete increases, but the mixing rate used in this process is about 5-15%.

Part of the cement can be replaced with silica fume (for example, 3-4 kg of cement can be replaced with 1 kg of silica fume) to maintain strength, but the price of silica fume is high, so if you want to manufacture high strength concrete or It is economically feasible to use when producing dense concrete.

Portland cement is used as the cement for the color-permeable concrete of the present invention, and aggregates are those using high-quality recycled aggregates specified in KS F 2573 (recycled aggregates for concrete) and washed cleanly with water. And by using the aggregates within the size of 2.5 ~ 13㎜ to clean the aggregate cleanly to maximize the air gap of the right size to maximize the permeability, beautiful road surface and to maintain the vivid color.

Water used in the present invention is difficult to affect the quality of concrete due to the mixing of foreign substances, such as oil, acid, organic matter, so that generally drinkable water is optimal as the use water, but in terms of cost reduction, industrial water, river water, etc. If you want to use it, you only need to use it if there is no problem after using the ingredients.

In order to reduce the initial dry shrinkage, the volume expansion, and the suppression of the heat of hydration, the expansion agent used in the present invention uses 1-20% of the amount of cement for shrinkage compensation expansion agent for the preparation of the expansion cement cement concrete.

Pigment is an inorganic or organic compound of color and is a fine powder and has no property of coloring an object, but it is colored by being dispersed and fixed in combination with asphalt and cement. Organic pigments have various colors but poor weather resistance depending on the type, so they are more vaporized than organic pigments. It is better to use inorganic pigment which has excellent weather resistance to change and little change in color.

Thus, the quality of the color-permeable concrete pavement that mixes water, cement, recycled aggregate, silica fume, expanding agent, pigment, and retardant and the design of the color-permeable concrete by the selected material (with appropriate strength and porosity required for permeability) It is required to determine the blending ratio of each material so as to be the most economical product in the range that can maintain the appropriate color and the proper workability for the construction. It is necessary to determine the formulation design sequence in order of estimating the compounding ratio that satisfies the compounding conditions, conducting the test mixture, and determining the economical formulation according to the result of the test mixture. desirable.

In addition, the product produced in the batch plant by the above process is also installed within 1 hour 30 minutes to be transported to the shop site does not start hardening does not significantly affect the quality. When curing begins, problems such as material separation, reduced flatness of the packaging surface, and reduced strength may occur. It can be adjusted by using a high performance emulsifier, a water reducing agent and a retardant.

The water-permeable concrete of the present invention mixed in the above process is laid on the road surface and then compacted with a roller to enhance the bonding force between aggregates, and secure flatness of the compacted surface. In order to prevent cracks caused by evaporation of moisture after the compaction of rollers and to prevent unevenness caused by pedestrians' traffic, it is generally covered with vinyl and nonwoven fabrics to prevent direct sunlight, thereby curing concrete while increasing color preservation and strength. After 1 ~ 2 days in this state, the vinyl or non-woven fabric is rolled out and the shrinkage joint and expansion joint are treated on the concrete surface layer as needed.

Thus, the permeable concrete layer can secure the required strength by the compounding ratio of the synthetic granularity and the amount of unit material, and the permeability of the concrete can be secured more than 1 × 10-2cm / sec, and the porosity is 8 ~ 10%. Not only is a good permeability secured, but also a clearer color of permeable concrete.

1 is a view showing a case in which the concrete layer for laying the surface of the color permeable concrete using two kinds of recycled aggregate in the present invention.

Here, 1 represents a base layer and an auxiliary base layer, and 2 represents a surface layer made of porous concrete for surface layer using waste concrete.

As described above, the present invention is to recycle from the concrete ingot generated from the dismantled concrete structure to aggregate in the pavement concrete road pavement, and the recycled aggregate which stabilizes the absorption rate by removing the fine powder on the surface is used as the basic aggregate. Cement, silica fume, high fluidizing agent is added, and water, pigment, swelling agent and mixed material are added to improve the quality.

Step 1: Production and pre-wetting process of recycled aggregate

The waste concrete is pulverized to the particle size standard of KS F 2573 (recycled aggregate for concrete), and it is a process of removing fine powder attached to the aggregate surface through an aeration tank. In addition, in order to adjust the high absorption rate of the aggregates degraded prior to blending, it is a process of spraying water on the surface of the aggregates to secure workability. At this time, the quality of the two kinds of recycled aggregates used in the present invention among the aggregates satisfying the KS F 2573 (concrete recycled aggregates) quality standards are shown in Table 1.

Absorption rate (%) importance Wear rate (%) Particle shape determination performance rate (%) Sieve Passage (%) 25 mm 20 mm 10 mm 5 mm 2.5mm 5 or less 2.2 or higher 40% less than 55 or more 100 90-100 20-55 0 to 10 0 to 5

Second Process: Cement Input Process

280-350kg / m2 of cement and 5-15% of cement substitutes are added to prewet recycled aggregates to effectively remove fines from the surface of recycled aggregates and to control the absorption rate. It is a process of mixing. The cement is added first because the strength is determined through the dry beam, and the interface between the aggregate and the aggregate is determined and the porosity is easily secured. In addition, the silica fume is added to increase the strength. As the mixing rate of silica fume increases, the compressive strength of concrete increases, but the mixing rate used in this process is about 5-15%.

Part of the cement can be replaced with silica fume (for example, 3-4 kg of cement can be replaced with 1 kg of silica fume) to maintain strength, but the price of silica fume is high, so if you want to manufacture high strength concrete or have high durability It is economically feasible to use it when manufacturing concrete.

3rd process: process of inputting recycled aggregate, water, and mixed materials

It is a process to complete the pitched concrete for sidewalks and bicycle roads by mixing fine aggregates, pigments, water, swelling agents, and miscible materials in a dry-mixed mixer with recycled aggregates, cement, silica fume, and a high fluidizing agent. In general, the Korean Industrial Standard stipulates the quality standards for packaging aggregates of less than 40%.

It is desirable to induce strength expression by using water-cement ratio in the range of 25-40% so that the slump of the finished permeable concrete is 0-5cm or less. Especially for the proposed slump, the workability problem is corrected by using high performance fluidization sensitizer.

4th process: water soluble epoxy resin application process

After laying the completed permeable concrete after the above process, it is a process of spraying a water-soluble epoxy resin in order to secure the bonding strength and color expression of the upper surface in order to completely dry and ensure the durability of the product.

Color-permeable concrete produced and constructed by the above processes meets the strength values specified in the Korean Industrial Standard. In addition, unlike conventional products, the slump is adjusted to 5 cm or less, so that stable product management is easy, and it can be transported using a dump truck. The color-permeable concrete transported in this way is sprayed sufficiently to wet the surface contacting materials such as basement and boundary stone before laying to prevent moisture loss of the permeable concrete, and install it by manpower or equipment with care not to cause material separation. . Surface pavement must be homogeneous and compact during construction as it can be directly affected by traffic loads and the environment, and must have sufficient flatness to drive traffic vehicles directly. In addition, the uniform height should be maintained during installation. The compaction is vibration-free to maintain the permeability gap, and the left and right outer parts are wedge-shaped, and the voltage is 2 to 8 times by the use of hand rollers and compactors for flatness and compactness of the surface layer. Care should be taken so that the gap between the jaws and the finishing jaws is not widened.)

(Example)

Adjust the particle size to fit the particle size range of KS F 2573 (concrete recycled aggregate), and manufacture the 2nd recycled aggregate (10mm) permeable concrete with low slump permeable concrete less than 2cm for basic sidewalk (bicycle) For road) Using two kinds of recycled aggregate (13mm), 180kg / cm2 of strength standard and 7cm of surface layer will be packed.

Equipment used for this embodiment includes (1) a grinder: a consignment grinding in a grinder including an aeration tank; (2) mobile production equipment 50 m 3 / hr; (3) Construction equipment: 1 turndem roller, 1 ascon finisher, 1 coated sprayer.

The materials prepared for this example are recycled aggregates, pigments, cement, silica fume, water used, expansion agents, high flow sensitizers, and epoxy resins. In the case of aggregates, total recycled aggregates were used. The calculated amount was prepared using the design.

The compounding ratio of the materials used in the present embodiment is shown in Table 2.

Water-cement ratio Amount of material Unit weight Usage cement Recycled aggregate Pigment Admixture 38.6 110 280 1,640 10 1.51 2,040

Processes performed in this embodiment are as follows.

First step: The waste concrete ingot was charged to a crushing plant having an aeration tank, and then first processed to be suitable for the crushing process of Table 1, and then pre-wet and added to a mobile production facility for correction of water absorption.

Second process: 1,640 kg of recycled aggregate, 260 kg of cement, 20 kg of silica fume, and 5.2 kg of high fluidizing agent were added to dry bibeam.

Third step: 10 kg of pigment, 110 kg of water and 1.51 kg of mixed material were added to the electric process and mixed.

4th step: Since the slump of the permeable concrete produced in the electric process is 5cm or less, it was transported using a dump truck and laid in the field. In laying on the site, concrete was installed with a finisher, compacted with rollers, paved with 7cm for bases, and grounded permeable concrete 7cm above.

5th step: After the curing of the surface-permeable concrete is finished, water-soluble epoxy resin is sprayed on the surface to complete the pavement.

The quality of the permeable concrete completed by the present example was examined and the results are shown in Table 3.

division slump Compaction rate Porosity burglar Recycled pitched concrete 0 98% 7% 205 Quality standards 0-2 More than 96% - Above nominal strength

As shown in Table 3, it can be seen that the quality of the road paved with water-permeable concrete using two kinds of recycled aggregates according to the present embodiment exceeds the standard specification.

delete

As described above, the present invention can maximize the efficient resource management and recycling effect by building a smooth distribution network of the produced second-generation recycled aggregate by pre-processing the second-type recycled aggregate to be used as a raw material for packaging materials. As a result, more effective technology ripple effects can be expected. In addition, by using two kinds of recycled aggregates, silica fume can be used as a substitute for cement to compensate for the strength reduction, and it can bring a simultaneous effect of cost reduction, and shrinkage compensation for preventing cracks due to initial dry shrinkage, which is a problem of permeable concrete. Mixing the expanding agent has the effect of bringing stability of the product.

 1 is a cross-sectional structure diagram when the porous concrete layer for laying the surface in color permeable concrete using two kinds of recycled aggregate in the present invention.

* Description of the symbols for the main parts of the drawings *

1: substrate and subbase

2: Surface layer (porous concrete for surface layer using waste concrete)

Claims (5)

In order to grind the waste concrete to KS F 2573 (recycled aggregate for concrete) and to remove the fine powder adhering to the aggregate surface through the aeration tank, and to adjust the high absorption rate of the degraded aggregate before mixing Producing and pre-wetting two kinds of recycled aggregates by spraying water on the surface of the aggregates to ensure workability and conforming to the two kinds of recycled aggregates KS quality standards; In the production and pre-wetting process of the second recycled aggregate, 280-350kg / m2 of cement and silica fume were replaced by cement to pre-wet recycled two-type aggregate in order to effectively remove the fine powder on the surface of the two-type recycled aggregate and to manage the absorption rate. A cement input step of mixing by adding -15%; Recycled aggregates, water, and mixed materials to complete the pitched concrete for sidewalks and bicycle roads by incorporating fine aggregates, pigments, water, inflating agents, and mixed materials into a mixer that is mixed with the two types of recycled aggregates, cement, silica fume, and a high fluidizing agent Input process; After the two types of recycled aggregates, water, and mixed materials, the completed permeable concrete is laid, and then water-soluble epoxy resin is used to secure the bonding strength and color of the upper surface to completely dry and secure the durability of the product. Color-permeable concrete manufacturing method using two kinds of recycled aggregates, characterized in that made of a water-soluble epoxy resin coating process to spray. delete delete The method of claim 1, In order to reduce initial dry shrinkage, to minimize volume expansion, and to suppress the heat of hydration, the production of color-permeable concrete using two kinds of recycled aggregates is characterized by using 1-20% of the amount of shrinkage compensating agent for the production of expansion cement cement concrete. Way. Color-permeable concrete using two kinds of recycled aggregates, which are produced as a method according to claim 1.