KR100203990B1 - Methods of paving road and of manufacturing sidewalk blocks using waste cement concrete - Google Patents

Abstract

The present invention relates to a road pavement and sidewalk block manufacturing method using waste concrete, the waste concrete is crushed by crusher No.357, No.467, No.57, No.7, No of KSF2527 .78 particles, 80-100% pass through 8 mm sieves, 40-80% pass through 5 mm sieves, 0-40% pass through 2.5 mm sieves, 40 mm-5 mm particles, and fine particles (grain aggregates) The particles are classified into particles of 5 mm or less. Among them, the aggregate is selected so that the absolute aggregate weight is 1.8 or more, the absorption rate is 8.0% or less, and the washing loss is 1.0% or less. Aggregate is selected so that the specific gravity is 1.8 or more, the absorption rate is 15% or less, and the washing loss is 8.0% or less. Then, the aggregate is reinforced with general aggregates and polymers to reinforce the strength of the aggregates. Concrete, Lean Concrete, Surface Concrete, or Table In such permeable concrete or paving for manufacturing relates to the pavement and sidewalk production process using waste concrete used as aggregate or coarse aggregate.

Description

Method of manufacturing concrete pavement and sidewalk blocks using waste concrete {Methods of paving road and of manufacturing sidewalk blocks using waste cement concrete}

The present invention relates to a road pavement and sidewalk block manufacturing method using waste concrete, and more specifically, to classify the crushed waste concrete by particle size, and to check the absolute drying specific gravity, water absorption rate, loss of Los Angeles wear, washing amount, etc. Selecting more than a certain level and properly blended with general aggregate or polymer, etc. The present invention relates to a road pavement and sidewalk block manufacturing method using waste concrete.

Dismantling a concrete structure produces a large amount of concrete waste, ie waste concrete. Exact figures because the official statistics on waste concrete there will no be seen, when considering dismantling the trend of old buildings due to redevelopment or reconstruction of near-ultraviolet and emissions of waste concrete will do this in the years millions of m ^3, and recycle at duplex It is believed that the amount that can be made will be more than 60% of the total emissions.

Such waste concrete is crushed to a certain size (about 30cm) and used as a backfill for retaining walls, but its amount is insignificant, and most of it is used for landfills such as reclaimed land or discarded in landfills. It is a big problem in terms of.

In this regard, many researches have been conducted on recycling waste concrete without environmental pollution, and as a part thereof, conventionally, the waste concrete is pulverized and used as base crushed stone for road construction or by mixing crushed waste concrete with cement. It has been proposed to manufacture low quality bricks and blocks.

However, when crushing waste concrete to a certain size and use it for the crushing of secondary bases of roads, dust and cement contained in the waste concrete aggregates strongly alkaline calcium hydroxide flows out of the waste concrete and contaminates soil and groundwater. When the mixed waste concrete is mixed with cement, the quality of the crushed waste aggregate is not uniform, so it is difficult to control the quality and the latans and bleeding are large. In particular, there was a problem that the durability is weak.

In the case of producing low-quality bricks or blocks by mixing waste concrete with cement, the compressive strength is low, and the use thereof is limited, and thus, the waste concrete has not contributed significantly to recycling a large amount of waste concrete.

However, the present inventors, after crushing the crushed waste concrete and classifies by particle size, and after checking the absolute dry specific gravity, water absorption rate, Los Angeles wear rate, washing loss amount and the like to a certain level or more, cement, general aggregate, polymer The present invention has been completed after repeated studies, considering that it can exhibit substantially the same quality as general concrete when properly mixed and used.

In waste concrete aggregates, aged cement accounts for 20-40% of the aggregate, but is generally superior to the quality of lightweight aggregates. Therefore, if the quality of the crushed waste concrete is screened and selected and classified according to the use, it can serve as an excellent concrete aggregate, and can be used in parallel with general concrete in road pavement or pulverized as a polymer. When the waste concrete is used by special surface treatment, it can be used for the surface layer of paving concrete.

On the other hand, since the water absorption rate and specific gravity of concrete vary depending on the amount of aging cement contained in the waste concrete, it is difficult to maintain the desired uniform concrete quality when formulated with the same water-cement ratio as in general concrete. As low-slump road pavement concrete of 25-40% is not sensitive to slump change according to the unit quantity, it is the most efficient and economical to recycle waste concrete as aggregate for road pavement.

As described above, the present invention has been proposed to solve the conventional problems caused by the recycling of waste concrete to maximize the recycling range of the waste concrete and to reduce the environmental pollution to the minimum, and an object of the present invention is to grind the waste concrete. Classify by particle size, check absolute dry weight, water absorption rate, Los angel's wear rate, washing loss, etc., and select more than a certain level. And it provides a method for use as aggregate in the manufacture of the sidewalk block.

More specifically, it is an object of the present invention to provide a method of using pulverized waste concrete as an aggregate of base concrete for road pavement.

Another object of the present invention is to provide a method of using pulverized waste concrete as aggregate of compacted concrete for base pavement of road pavement.

It is another object of the present invention to provide a method of using pulverized waste concrete as aggregate in lean concrete of road pavement.

It is still another object of the present invention to provide a method of using pulverized waste concrete as aggregates for porous concrete for surface layers and porous compacted concrete for substrates.

It is another object of the present invention to provide a method of using pulverized waste concrete as aggregate in the permeable concrete for the surface layer of road pavement.

It is another object of the present invention to provide a method of using pulverized waste concrete as aggregate in a sidewalk block.

1 is a cross-sectional view illustrating a case of laying a porous concrete layer for a base layer of concrete using waste concrete and packing a mortar of a thin layer thereon.

Figure 2 is a cross-sectional view illustrating a case of laying a compacted concrete layer for the base layer of concrete using waste concrete and laying the asphalt concrete or asphalt concrete thereon.

3 is a cross-sectional view illustrating a case where a lean concrete layer is formed of concrete using waste concrete and a general road is paved thereon;

Figure 4 is a cross-sectional view illustrating a case of installing a porous concrete layer for the surface layer and a porous compacted concrete layer for the base layer with concrete using waste concrete.

5 is a cross-sectional view illustrating a case of laying a porous concrete layer for surface layer with concrete using waste concrete.

6 is a perspective view of a sidewalk block prepared by backfilling with concrete using waste concrete and prefilling with concrete using normal sand.

In the present invention, the first step is to separate the particle size by pulverizing the waste concrete, in this process by grinding the waste concrete with a crusher No.357, No.467, No.57 of KSF2527 (concrete crushed stone) , No.7, No.78 particles, particles that pass 80-100% in an 8mm body, 40-80% in a 5mm body, 0-40% in a 2.5mm body, 40mm-5mm particles, and It is classified into particles of 5 mm or less which are fine particles (or fine aggregates).

The second process is to inspect the quality and reinforce the strength according to the size of the particles. For coarse aggregates of 5mm or more among the particles classified in the electrical process, the absolute specific gravity is 1.8 or more, the absorption rate is 8.0% or less, and the washing loss. Aggregates are screened so that silver is 1.0% or less. Aggregates are screened so that the absolute aggregate weight of 5 mm or less is 1.8 or more, the absorptivity is 15% or less, and the amount of washing loss is 8.0% or less. If the compressive strength required after packing is less than 210㎏ / ㎠, it is not necessary to set a separate wear rate.However, if the compressive strength required after packing is 210㎏ / ㎠ or more, general aggregate is mixed within 50%. So that the overall wear rate can be less than 40%. The use amount of ordinary sand in the residual particles is within the range of 100% when the required compressive strength is 250 kg / cm 2 or more, within the range of 80% when the compressive strength is 210-250 kg / cm 2, and 210 kg. If less than / cm 2, use within 50%. However, when the specific gravity of the surface dry saturation state of the aggregate as the high-quality crushed waste concrete that can maintain the strength is 2.50 or more, 100% of the pulverized waste concrete residue may be used.

In pavement or manufacture of sidewalk blocks using crushed waste concrete classified and screened in the electric process, the size, amount and amount of particles of crushed waste concrete are mixed according to the use, characteristics of the road to be paved, or required compressive strength. The amount of materials used is determined.

FIG. 1 shows a case where ground waste concrete is used as the porous concrete for the base layer, and a thin layer pavement of mortar is used as a surface layer on the top thereof. This paving method can be applied to sidewalks, bicycle paths, plazas, parking lots, alley pavement, etc. In general, the required compressive strength is 100-250㎏ / ㎠ level. In this case, pulverized waste concrete is pulverized to 40 mm or less and sorted into 40 mm-5 mm, 5 mm or less, and then used. After installation, it is compacted with Laura and surface treated to complete the road. At this time, the base layer is made of porous compacted concrete to strengthen the adhesive force with the surface layer.

Figure 2 shows the case of laying the concrete using the crushed waste concrete as a compacted concrete layer for the base of the general pavement. The required compressive strength is 150-300kg / cm2, but especially when the strength of 210kg / cm2 or more is required, the use of coarse aggregate is mixed with general aggregate so that the total aggregate wear rate is 40% or less. Also, it is preferable to use 50% or more of the usage as general sand. If ascon is used for surface layer after packing, ascon is packed after base curing is completely cured, and when concrete is packed immediately.

FIG. 3 shows a case where the ground waste concrete is used as a pavement material of a lean concrete layer which is a stable treatment layer of a road. Since the strength of the lean concrete layer is 10-50 kg / cm 2, the waste concrete pulverized to 40 mm or less may be used. However, in order to maintain the homogeneity of the quality, it is preferable to produce concrete by separating it to 40 mm-5 mm or 5 mm or less.

Figure 4 shows the case of using the pulverized waste concrete as a pavement of the water-permeable concrete of the double pavement. Since the surface layer is a part directly contacting the load, the wear rate of the aggregate should be 40% or less. Therefore, some aggregate of the same size as the crushed waste concrete should be used. It is also necessary to treat and reinforce the polymer to protect the fragile cement surface of the surface layer. Since the base permeable concrete is not directly loaded, only the crushed waste concrete can be used alone to maintain a certain strength. However, when compressive strength of 210kg / ㎠ or more is required, it should be mixed with general aggregate in consideration of the wear rate. This double pitched concrete can be applied to bicycle roads, plazas, parking lots, small driveways, and the like.

FIG. 5 shows the use of pulverized waste concrete as a packaging material when directly laying surface-permeable concrete on the base and sub-bases without placing porous base-permeable concrete in FIG. 4. In this case, the product cost is rather high, but there is an advantage that the construction is easy.

6 is a perspective view of a high-pressure sidewalk block manufactured using pulverized waste concrete. The lower part of the block is backfilled with concrete using crushed waste concrete, and the upper part is completed with the secondary voltage by prefilling it with concrete using general aggregate. Since the backfill part using waste concrete is not directly exposed to the outside, it only needs to maintain a certain strength.

Hereinafter, the present invention will be described in more detail on the basis of the process of sorting and sorting the pulverized waste concrete and using this sorted pulverized concrete in the case of FIGS. 1 to 6.

1st process: peconcrete grinding and sorting process

The waste concrete is crushed with crusher to pass 80-100% of No.357, No.467, No.57, No.78 No.78 particles, 8mm sieve of KSF2527 (concrete cinder) It is a process that classifies 40-80%, 0-40% of particles in 2.5mm sieve, 40mm-5mm particles, and particles of 5mm or less.

Second Process: Quality Inspection and Strengthening Process of Crushed Waste Concrete

The crushed waste concrete aggregate is divided into coarse aggregate and fine aggregate, so that the absolute dry weight is over 1.8 for the coarse aggregate, the absorption rate is under 8.0%, the washing loss is under 1.0%, and the absolute dry weight is 1.8 for the fine aggregate. As mentioned above, it is a process of examining whether water absorption is 15% or less and washing | cleaning loss amount is 8.0% or less.

For coarse aggregates, it is not necessary to determine the wear rate of aggregates when the compressive strength required after packing is less than 210 kg / cm 2, but the wear rate should be 40% or less when the compressive strength required after packing is 210 kg / cm 2 or more, If this is exceeded, general aggregates should be mixed within 50% so that the overall wear rate is less than 40%. Particularly, when concrete using crushed waste concrete is used as the surface layer, it is preferable to use polymer or emulsified asphalt adsorbed to crushed waste concrete aggregate to enhance strength and durability. At this time, water-soluble acrylic resin, water-soluble epoxy, EVA, SBR latex may be used, and water and water-soluble polymer are mixed at 1: 1-10 so that the polymer is saturated in the aged cement of the crushed waste concrete aggregate. .

The use amount of ordinary sand in the remnant is within the range of 100% for the required compressive strength of 250kg / ㎠ or more, within the range of 80% for the compressive strength of 210-250㎏ / ㎠ and 210kg / If it is less than 2 cm 2, it is used within 50%. However, when the specific gravity of the surface dry saturation state of the aggregate as the high-quality crushed waste concrete that can maintain the strength is 2.50 or more, 100% of the pulverized waste concrete residue may be used.

At this time, the specific gravity and absorption of coarse aggregates are determined to be 1.8 or more and 8.0% or less, and the specific gravity and absorption of fine aggregates is set to 1.8 or less and 15% or less, for example, waste concrete composed only of mortar without coarse aggregates or waste concrete. This is because when the pavement is formed with a formulation of 100 kg or less per 1 m ³ , or when formed with a formulation having a too high unit quantity, the durability of the concrete using waste concrete of such a defect may be lowered. When bad concrete is aged or when crushed waste concrete composed only of mortar is used, in order to increase the strength and durability of concrete, a large amount of cement or new aggregate or polymer is required, and thus it is not economical. The above criteria are set in consideration of these economic aspects.

In addition, the wear rate is set at 40% or less according to the KS standard. If the compressive strength is required to be 210 kg / cm 2 or more, if the wear rate of the coarse aggregate is 40% or more, This is because there is a fear that the durability of the concrete may drop rapidly due to the load. In the case of using crushed waste concrete as surface concrete, the wear rate of coarse aggregate must be 40% or less because the surface layer is directly affected by weather changes and loads by vehicles. In addition to lowering the wear rate by mixing, the wear rate should be lowered by reinforcing the aged cement with polymer. The polymer treatment absorbs the polymer resin in the aged cement, so that the absorption rate is lowered and the specific gravity is improved, and the linkage between the aggregate and the new cement is formed to form a rapid shape of adhesive strength and general strength, and in particular, durability is quite high. It will have an increasing effect.

Third Process: Mixture Design Process

Concrete using crushed waste concrete should be mixed according to the use, and the difference of mixing is great for each use. Therefore, hereinafter, the respective formulations used in the concrete pavement and sidewalk block manufacturing of Figures 1 to 6 will be described.

One). Mixing range in the case of laying concrete using ground waste concrete of FIG.

Concrete using the waste concrete used for the base layer of the surface reinforcement method of Figure 1 is porous blending, the required compressive strength is 100-250kg / ㎠ and porosity is 4-12%. In the production of porous concrete for substrates using waste concrete, the grains of crushed waste concrete use waste concrete coarse aggregate selected from Nos. 467, No. 57 and No. 67 of KSF2527, and the remaining particles are # 4. Use aggregated waste concrete or general sand within 5% of aggregate that passes through the sieve, but use within 30% of the coarse aggregate use, and mix the coarse aggregate and the residual particles to 1m3 of the maximum compaction weight. 250-450 kg, water is based on the aggregate dry saturation of the aggregate, water-cement ratio is used in the range of 25-45%, water reducing agent is used within the range of 2% of the weight of the cement. The reason why the base layer is made porous is to increase the adhesion with the upper surface layer.

The upper surface mortar uses sand or silica sand and slag of 5mm or less, and it is used in the range of 300-700kg of cement for 1㎥ of sand of the maximum compaction standard, and water is used in the range of 25-40% by water-cement ratio. The reducing agent should be used within 2% of the amount of cement used. In case of coloring, inorganic pigments should be used and the amount of pigment used should be within 10% of the amount of cement.

2). Mixing range of the ground compacted concrete using the ground waste concrete of Figure 2

Concrete using waste concrete used in the compaction concrete for base substrate of Figure 2 has a required compressive strength of 150-300㎏ / ㎠ and porosity within 10%. In the production of compacted concrete for substrates using crushed waste concrete, the particle size range of crushed waste concrete uses aggregates of Nos. 357, Nos. 467, Nos. 57 and No. 67 of KSF2575. Use less than 5mm of fine particles of waste concrete or ordinary sand, and use within 1m3 of crushed waste concrete aggregate in the range of 250-500kg of cement. Water is based on surface dry saturation and 25- by water-cement ratio. Use at 40% range and reducer at 2% of cement usage.

3). Formulation range of lean concrete using pulverized waste concrete of Figure 3

Concrete using waste concrete used for the paving of the stable treatment layer (the lean concrete layer), which is the basis of the pavement of FIG. 3, has a required compression strength of 10-50 kg / cm 2 and a void mixture having a porosity of 20% or less. In the production of stabilized layer concrete (lean concrete) using waste concrete, waste concrete aggregates crushed to the particle size range of No.357, No.467, No.57 are used. It is used within 70% of the total aggregate, and the cement is used in the range of 60-200㎏ for 1㎥ of crushed waste concrete compaction standard, and the water is based on the surface dry saturation and 30- based on the water-cement ratio. It is 50% and the water reducing agent is used within 2% of the cement usage.

4). Mixing range of permeable concrete using crushed waste concrete of FIGS. 4 and 5

4 and 5 is a permeable product packaging method, Figure 4 is to package the permeable packaging divided into a surface layer and a base layer, Figure 5 is to be used for the surface layer by a method of packaging only the surface layer. 4 and 5 are the same for the surface layer formulation, and the permeable product for the surface layer using waste concrete should receive the surface load directly and have high compressive strength, and the surface shape should be clean. Therefore, the aggregate used is 80-100% in 8mm sieve, 40-80% in 5mm sieve, 0-40% in 2.5mm sieve is good to use. 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 must be adsorbed by adding polymer or emulsified asphalt to strengthen durability. do. At this time, the polymer may be water-soluble acrylic resin, EVA, water-soluble epoxy, SBR latex and the like. Cement uses 250-450kg for the maximum compaction standard for waste concrete aggregate and general aggregate, 250-450kg, water is used for surface dry saturation, 25-40% for water-cement ratio, and water-reducing agent is used for cement. Use within 2%. When coloring is required, inorganic pigments are used within 10% of the cement usage. The compressive strength is such that the 120-250㎏ / ㎠ and permeability is 10 ^-2 ㎝ / sec or more.

Since the base permeable concrete is not directly loaded, the strength is 120-250 kg / cm 2 and the permeability coefficient is 10 ^-2 cm / sec or more. In the production of concrete using crushed waste concrete, waste concrete aggregate crushed to the particle size range of Nos. 467, No. 57, No. 67, No. 78, No. 7 of KSF2527 shall be used, but waste concrete less than 5mm Residual particles are used within 20%. 250 to 450 kg of cement is used for 1 ㎥ of aggregate prepared in this way, water is based on surface dry saturation, 25 to 45% is used as water-cement ratio, and water reducing agent is used within 2% of cement usage. .

5). 6 Mixing range of high pressure block using waste concrete crushed aggregate

The high pressure block using waste concrete is backfilled with concrete using waste concrete at the bottom, and the surface layer is prefilled with concrete using sand or silica sand. The waste concrete mixture used for the lower part uses 10-70% of coarse aggregates of 13mm-5mm and 30-90% of 5mm or less of crushed waste concrete particles. Use in the range. Cement 300-500kg is used for maximum compaction standard of 1㎥, water is based on dry dry saturation state of aggregate, and it is set in the range of 20-35% by water-cement ratio, and water reducing agent is within 2% of cement usage. use.

As the surface layer, mortar uses sand less than 5mm of KSF2526, 250-500kg of cement is used for 1m3 of sand of maximum compaction standard, water is based on dry surface saturation of aggregate, and water-cement ratio is 20-35 It is used in the range of% and the reducing agent is used in the range of 2% of the cement usage. When coloring is required, inorganic pigments are used within 10% of the amount of cement used.

4th step: laying process

Road paving concrete using waste concrete should be produced with products with low water-cement ratio in order to compensate for the disadvantages of crushed waste concrete, and it is almost impossible to complete products with low water-cement ratio only by laying them. Pledge to complete. Since concrete using waste concrete requires a lot of moisture when laying, it must be laid while spraying or compacting while spraying. When compacting with rollers, it is compacted to 93% or more of the compaction density determined by KSF2312 (test method for soil compaction). Should be done.

The porous concrete layer for the base material using the waste concrete of Figure 1 is compacted with Laura after the concrete installation, within 1 hour after the chopped mortar mixed within less than 3cm and clean the surface with a trowel while compacting the finish with Laura.

The compacted concrete layer for the base material using the waste concrete of Figure 2 is compacted after laying the concrete, the surface is packed with ascon for curing after curing, and when paving concrete on the surface layer, it is packed within one hour after compacting with the ground compacted concrete By increasing the adhesive strength, the compaction is compacted with Laura so that the compaction rate is 93% or more.

Lean concrete layer using the waste concrete of Figure 3 is compacted with Laura so that the compaction rate is 93% or more in the compaction after concrete laying.

In the case of FIG. 4, after compacting the porous base concrete to have a compaction rate of 93% or more after pavement, and laying the permeable concrete for surface layer, the compacted base material has a compaction rate of 93% or more within 1 hour after pavement. do.

In the case of Figure 5, after laying the base layer, the ground-permeable concrete is laid and rolled to be 93% or more.

The high pressure sidewalk block of Figure 6 is steam curing, autoclave curing or natural curing in accordance with conventional methods.

5th Process: Joint and Curing Process

Joint and curing are carried out according to a conventional method. However, concrete for road pavement using waste concrete may have more than 10-50% joint space than general pavement because shrinkage and expansion may be larger than general concrete.In curing, the absorption rate is higher than that of general aggregate. More healing and watering should be done.

6th step: polymer spreading process

After curing for 2 days or more, it is applied only to the dry state of FIGS. 1, 4, and 5, and when concrete using waste concrete is used as a surface layer or a thin layer is packaged on the surface as shown in FIG. Increase durability. At this time, the polymer used is water-soluble acrylic resin, epoxy, unsaturated resin, silicone, SBR latex and the like to be sufficiently sprayed on the surface to be sucked to the inside.

Hereinafter, the present invention will be described based on Examples.

(Example 1)

In the case of laying a 100m long, 3m wide, green color and smooth road, the base is installed as a crushed stone subbase, and the base concrete is laid with 6.2cm thick porous concrete using crushed waste concrete. Finished by laying a green mortar thickness of 0.8 ㎝ on the top, the strength of the concrete for the base and surface layer was constructed in the following process on the basis of the strength of more than 180kg / ㎠.

1st process: peconcrete grinding and sorting process

The waste aggregate is pulverized and the coarse aggregate is prepared by producing No.57 aggregate to fit the KSF2527 particle size, and in order to make the porosity of the porous concrete for the base material within the range of 4-12%, Used in% range.

2nd process: crushed waste concrete quality inspection process

The quality test results for the pulverized waste concrete are as follows.

division Crude Aggregate (No. 57) Fine aggregate (less than 5mm) Weight ratio Absorption rate (%) Wear rate (%) Washing loss amount (%) Weight ratio Absorption rate (%) Washing loss amount (%) result 2.32 5.8 38 0.3 2.10 10.8 4.9 Management standard 1.8 or more 8.0 or less - 1.0 or less 1.8 or more 15 or less 8.0 or less KS Standard 2.50 or more 3.0 or less - 1.0 or less 2.50 or more 3.0 or less 3.0 or less Test Methods KSF2503 KSF2503 KSF2508 KSF2511 KSF2504 KSF2504 KSF2511

Since the standard compressive strength was less than 210kg / cm ² and more than the management standard, 100% of coarse aggregate or fine aggregate of crushed waste concrete was used.

Third Process: Mixing Design Process

(One). Mixing of Porous Concrete for Substrate Using Pulverized Waste Concrete

(Design standard strength: compressive strength 180kg / ㎠, porosity 8% standard)

Material name water cement Crushed Waste Concrete Aggregate Crushed Waste Concrete Aggregate Water reducing agent Compounding amount Unit material amount (kg / ㎥) 95 272 1,538 260 1.36 18.6m ³

(The amount of aggregate is based on the surface dry saturation condition; the aggregate specific gravity of crude aggregate is 2.45, and the specific gravity of fine particles is 2.35.)

(2). Surface Mortar Mixing

(Design standard strength: compressive strength 180kg / cm ² porosity based on 7%)

Material name water cement Sand (less than 5mm particles) Water reducing agent Pigment (Green) Compounding amount Unit material amount (kg / ㎥) 102 320 1,889 1.60 22.4 2.4m ³

(Based on surface dry saturation state, specific gravity of sand is 2.60)

4th step: laying process

By conventional methods laying a subbase and laying the base layer of cellular concrete for using waste concrete thereon hwinisya 18.6m ³ is a packing thickness so that a 7.8cm and 6.2cm so that the compaction in the roller, compaction rate is 96% With the above compaction, water was sprayed on the surface when the surface became dry. Laying a surface layer of a porous concrete for the base layer mortar 2.4m ³ in less than an hour after laying and compaction to 1cm thick, and by the compaction to at least 96% by Laura summarized the surface with a trowel after the thickness after compaction so that the 0.8cm.

5th Process: Curing and Jointing

In accordance with the usual method to cover the vinyl sack and curing, and after curing for more than one day, the joint was placed at intervals of 3m.

6th step: polymer spreading process

After curing for 2 days or more, 0.3kg per 1 m ² was sprayed and dried to absorb water-soluble acrylic resins inside to remove pores remaining in the surface layer and to strengthen the surface strength, and then the package was opened.

The quality test results for the road completed by Example 1 are as follows.

division Substrate porous concrete using crushed waste concrete Surface Mortar Compressive strength (kg / m ³ ) Porosity (%) Compaction rate (%) Compressive strength (kg / m ³ ) color Test result 213 9.5 96.2 243 Same Reference value More than 180 4-12% 93 and above More than 180 Limit Sample Test Methods KSF2405 KSF2312 KSL5202 Visually

(Example 2)

In order to construct ascon pavement with length of 100m, width of 6m and driveway, 20cm of crushed subsidiary layer is installed as base, 10cm of compacted concrete using crushed waste concrete is installed as base, and surface layer is 5cm with ascon. I decided to install it.

Then, the compressive strength of the compacted concrete using waste concrete used for the base layer was set to 210kg / cm ² or more, and Ascone used for the surface layer was decided to install general No. 78, and proceeded to the next step.

1st process: peconcrete grinding and sorting process

By crushing the waste concrete, the coarse aggregate is No. 467 aggregate is produced and prepared, and the required strength is more than 210kg / cm ^2, so the residual particles below 5mm are used as 50% of crushed waste concrete and 50% of ordinary sand. 40% was set.

2nd process: crushed waste concrete quality inspection process

The quality test results of the crushed waste concrete are as follows.

Item Crude Aggregate (No. 467) Grinding Residue (less than 5mm) General sand Weight ratio Absorption rate (%) Wear rate (%) Washing loss amount (%) Weight ratio Absorption rate (%) Washing loss amount (%) Weight ratio Absorption rate (%) Washing loss amount (%) Result 2.35 6.0 38.4 0.2 2.12 9.2 4.8 2.57 1.0 0.2 Management standard 1.8 or more 8.0 or less 40 or less 1.0 or less 1.8 or more 15 or less 8.0 or less 2.50 or more 3.0 or less 3.0 or less KS Standard 2.50 or more 3.0 or less 40 or less 3.0 or less 2.50 or more 3.0 or less 3.0 or less 2.50 or more 3.0 or less 3.0 or less Test Methods KSF2503 KSF2503 KSF2508 KSF2511 KSF2504 KSF2504 KSF2511 KSF2504 KSF2504 KSF2511

Since the standard compressive strength is 210kg / cm ² or more but the wear rate is 40% or less, 100% of the waste concrete aggregate was used.

Third Process: Mixture Design Process

(One). Mixing of Compaction Concrete for Substrate Using Pulverized Waste Concrete

Material name water cement Coarse aggregate Aged Aggregate Water reducing agent Compounding amount smash Normal Unit material amount (kg / ㎥) 110 322 1,177 365 410 1.61 60m ³

(The amount of aggregate is based on the surface dry saturation state, the specific gravity of crude aggregate is 2.49, the specific gravity of ground fine aggregate is 2.32 and the specific gravity of general fine aggregate is 2.60.)

(2). Surface Asbestos

Asbestos for surface was used for general No. 78 ascon and blended 69ton.

4th process: laying process

After laying the auxiliary base in the usual way, 60m ³ of the ground compaction concrete using waste concrete was laid with a whisker and compacted with a roller so that the compaction rate was 96%, 10cm thick, and the spray was sufficiently sprayed with moisture. Ascon was laid in the usual way after curing pavement concrete for pavement to be above the design standard strength.

Fifth Step: Joint Process

Joints are installed according to the conventional method, and the intervals of the joints are 5 cm for the contraction joints, and cut to 3 cm of the surface of the compacted concrete for the substrate.

Quality test results of the concrete pavement according to Example 2 are as follows.

division Compacted Concrete for Substrate Using Crushed Waste Concrete General 78 Ascon Compressive strength (㎏ / ㎠) Compaction rate (%) Stability (kg) FLOW (mm) Porosity (%) Saturation (%) Test result 254 97 952 33 5.7 81.0 Reference value 210 or more 93 and above 500 or more 20-40 3-6 70-85 Test Methods KSF2505 KSF2312 KSF2337 KSF2337 KSF2364 KSF2337

Example 3

For paving walkways with a length of 100m, a width of 3m, a color of reddish brown and a permeability coefficient of 10 ^-1 cm / sec or more, the pitcher layer is 5cm thick, the base layer is 10cm thick, and the basement pitcher is using waste concrete. The thickness of the concrete was 7 cm, the thickness of the surface-permeable concrete using waste concrete was set to be 3 cm, and the strength of each of the base-permeable concrete and the surface-permeable concrete was 180 kg / cm 2 or more.

1st process: waste concrete grinding and sorting process

The waste concrete is pulverized, and the coarse aggregate is ground to No. 57 for the base layer, 80-100% for 8mm, 40-80% for 5mm, 0-40% for 2.5mm Special aggregates were prepared for passing aggregates. Since the present embodiment is to wrap the permeable concrete, the surface concrete does not use the residual particles of less than 5mm, and in the base concrete, the compressive strength required to mix and use about 10% of the residual particles is usually 180㎏ / ㎠ Because of the strength, the residual particles used 100% of the residual particles of pulverized waste concrete.

Second Process: Quality Inspection Process of Crushed Waste Concrete

The quality test results of the pulverized waste concrete are as follows.

division Grinded Waste Concrete Aggregate (No.57) Crushed waste concrete aggregate (8mm sieve) Crushed Waste Concrete Aggregate Weight ratio Absorption rate (%) Wear rate (%) Washing loss amount (%) Weight ratio Absorption rate (%) Wear rate (%) Washing loss amount (%) Weight ratio Absorption rate (%) Washing loss amount (%) Result 2.32 5.8 38 0.3 2.30 6.2 42 4.8 2.10 10.8 4.9 Self Management Standard 1.8 or more 8.0 or less 40 or less 2.0 or less 1.8 or more 8.0 or less 40 or less 2.0 or less 1.8 or more 15 or less 8 or less KS Standard 2.50 or more 3.0 or less 40 or less 1.0 or less 2.50 or more 3.0 or less 40 or less 1.0 or less 2.50 or more 3.0 or less 3.0 or less Test Methods KSF2503 KSF2503 KSF2508 KSF2511 KSF2503 KSF2503 KSF2508 KSF2511 KSF2503 KSF2503 KSF2511

The required compressive strength of the base concrete is 180 kg / ㎠, less than 210 kg / ㎠ as a general standard, the coarse aggregate used 100% crushed waste concrete. Since 8mm aggregate used for surface layer has more than 40% wear rate, it has reduced wear rate to 35.4% by using 8mm aggregate with 30% wear rate and 30%. Acrylic resins were adsorbed on the ground waste concrete to reinforce the strength.

Third Process: Mixing Design Process

The mixing amount was determined by dividing the base permeable concrete and the surface permeable concrete.

(One). Mixing permeable concrete for substrate using crushed waste concrete

(Design standard strength 180㎏ / ㎠; Porosity 15% design)

Material name water cement Crushed concrete aggregate (No. 57) Pulverized Waste Concrete (Fine Aggregate) Water reducing agent output Unit material amount (㎏ / ㎥) 106 302 1429 152 1.51 21㎥

(Based on saturated surface dry condition, the specific gravity of crushed waste concrete is 2.45 and the fine aggregate specific gravity is 2.35.)

(2). Water-permeable concrete formulation using ground concrete

(Based on design strength 180㎏ / ㎠; Porosity 15%)

Material name water cement Grinded Concrete (8㎜) General Aggregate (8㎜) Pigment (Red Brown) output Unit material amount (㎏ / ㎥) 110 316 1116 509 15.8 9㎥

(Standard blend of surface dry saturated state, specific gravity of crushed waste concrete; 2.49

General aggregate; 2.65)

The mixing order is to add coarse aggregate of crushed waste concrete, and then mix water-soluble acrylic resin with water 1: 5 and add 30㎏ / ㎥, and mix it in the order of general aggregate, cement, water, etc. In order to increase the suction power of the resin was used in air condition.

4th step: laying process

According to the conventional method, after the pavement layer and the crusher layer were paved, the groundwater-permeable concrete was laid and sprayed, and the roller was compacted to 96% or more of the KSF2312 standard density. The surface permeable concrete using crushed waste concrete was packed within 1 hour after laying the base layer, and sprayed 0.2 kg per m2 on the surface layer before pavement. After packing the surface layer, KSF2312 standard density was more than 96%. It was.

5th process: curing and joint process

After curing curing according to the usual method, cover the surface with vinyl, etc., and after curing for 1 day or more, put the joints with the katta at 3m intervals, and cut the width more than 1cm at 30m intervals. Was treated.

6th step: polymer spraying process

In order to supplement the compressive strength and durability of the pulverized waste aggregate, 0.3 kg per m 2 of epoxy was sprayed on the surface to increase color protection and surface strength.

Quality test results of the concrete pavement according to Example 3 are as follows.

division Permeable Concrete for Waste Floor Using Waste Concrete Permeable Concrete for Road Pavement Using Waste Concrete Total Permeability Coefficient (cm / sec) Compressive strength (㎏ / ㎠) Porosity (%) Permeability coefficient (cm / sec) Compressive strength (㎏ / ㎠) Porosity (%) Permeability coefficient (cm / sec) color Test result 197 17.9 5.1 × 10 ^-1 229 16.7 4.1 × 10 ^-1 equivalence 4.5 × 10 ^-1 Reference value More than 180 12 or more 10-2 or more More than 180 12 or more 10 ^-2 or more Limit Sample 10 ^-2 or more Test Methods KSF2505 Pitcher KSF2505 Pitcher Visually Pitcher

(Example 4)

In producing 10,000 sheets of sidewalk blocks with a width of 10 × 20cm, a height of 6cm, a backfill of 5cm, and a front fill of 1cm, the front fill is white and cured by pressing under high pressure. The high pressure block was set to have a flexural strength of 50 kg / cm 2 or more by the test method of KSF4019 (high pressure block).

Step 1: Peconcrete Grinding and Sorting Process

The waste concrete is crushed and classified into 13-5mm and 5mm to produce 13-5mm and 5mm, and 13-5mm is used as 40% and 5mm or less is used as the backfill and 5mm sand Is used as the front filling, but 5mm or less of crushed waste concrete at the back filling is more than 30%, so the amount of use is somewhat high, so the strength may be weak.

Second Process: Quality Inspection Process of Crushed Waste Concrete

The test results of the pulverized waste concrete used for back filling are as follows.

division Rough aggregate (13-5㎜) Fine aggregate (5 mm or less) General sand (5 mm or less) Weight ratio Water absorption Wear rate Washing loss Weight ratio Water absorption Washing loss Weight ratio Water absorption Washing loss result 2.30 6.2 42 0.8 2.10 10.8 4.9 2.57 1.0 0.2 Self Inspection Standard 2.0 or higher 8.0 or less 40 or less 2.0 or less 2.0 or less 12 or less 6 or less 2.5 or more 3.0 or less 3.0 or less KS Standard 2.5 or more 3.0 or less 40 or less 1.0 or less 2.5 or less 3.0 or less 3.0 or less 2.5 or more 3.0 or less 3.0 or less Test Methods KSF 2503 KSF 2503 KSF 2508 KSF 2511 KSF 2503 KSF 2503 KSF 2511 KSF 2503 KSF 2503 KSF 2511

Although high strength with a flexural strength of 50㎏ / ㎠ or more is required, the use of new aggregates and polymers was considered. However, after testing the flexural strength after test production, the new aggregates and polymers were used for backfilling. Instead of using, aggregates made of pulverized waste concrete were used.

Third Process: Mixture Design Process

(One). Backfill concrete with crushed waste concrete

Material name water cement Coarse aggregate Aggregate Water reducing agent Compounding amount Crushed sand General sand Unit material amount (㎏ / ㎥) 90 360 731 526 582 1.80 10㎥

(Aggregates are the criteria for surface dry saturation, the aggregate specific gravity of coarse aggregate is 2.45, the specific gravity of three aggregates is 2.35, and the specific gravity of ordinary sand is 2.60.)

(2). Prefill formulation using plain sand

Material name water Cement white sand Water reducing agent Pigment (White) Compounding amount Unit material amount (㎏ / ㎥) 85 340 1967 1.70 10.2 2㎥

4th step: Press block molding process

By adopting the automatic production method, prepare a mold with 50 inner diameters of 10 × 20 × 7.5㎝. First, mix the pulverized waste concrete into 7.5cm upper part, and vibrate and press firstly to lower it to 6-6.5cm. In addition, the mixture used as the second sand was added to the upper portion of 7.5cm to vibrate and pressurized secondly to 6cm. After pressing, the molded product was immediately removed from the mold. This was repeated 200 times to produce 10,000 sheets.

5th process: curing process

Steam cured for 10 hours at 65 ℃ in the usual manner.

6th step: polymer spreading process

Water and water-soluble acrylic resin was mixed at 1: 5 during spraying and sprayed to the inside, and then cured to a temperature of 4,000 ° C., followed by curing for 7 hours.

The present invention is to crush the waste concrete, and to classify and inspect the quality by particle size, and to properly mix with other aggregates for each use to produce road pavement or sidewalk blocks of almost the same quality as general concrete, so the present invention is a resource It can be said that it is very useful in terms of recycling, and it can also be said to be very useful for greatly improving the pollution of soil or groundwater due to conventional waste concrete.

In addition, since the waste concrete is pulverized and used as aggregate for concrete, its usefulness can be substituted for general aggregates, and thus its usefulness can be further recognized in terms of significantly preventing natural damage such as crushing of stone due to the development of aggregates. I would say.

Claims (20)

(Twice Correction) The waste concrete was pulverized and passed through 80-100% at Nos. 357, Nos. 467, Nos. 57, Nos. 7, Nos. 78 particles of KSF2575 (Concrete Crushed Stone) and 5 mm Classifying into particles passing 40-80% at 0-40% at 2.5 mm, particles 40 mm-5 mm, and particles at most 5 mm; Among the particles of the above process, the aggregate is selected so that the absolute aggregate weight is 1.8 or more, the absorption rate is 8.0% or less, and the washing loss is 1.0% or less for the coarse aggregate of 5 mm or more, and the absolute dry weight is 1.8 or more for the fine aggregate of 5 mm or less, Sorting the pulverized waste concrete aggregate such that the water absorption rate is 15% or less and the washing loss amount is 8.0% or less; And Mixing coarse aggregate and fine aggregate of the electrical process with water, cement and water reducing agent to produce concrete, and laying, compacting, curing and jointing according to a conventional method; Concrete paving method using waste concrete comprising a. (Twice correction) The method according to claim 1, wherein the sorted and sorted waste concrete aggregate is combined with water, cement, and water reducing agent to produce concrete, and after laying and curing according to a conventional method, water-soluble acrylic resin and water-soluble epoxy. Selecting at least one of EVA, SBR tacks or emulsified asphalt, concrete packaging method using waste concrete comprising the step of drying by spraying about 0.1kg per 1 m ² of the surface of the pavement. (Correction) The method according to claim 1, wherein when the concrete compressive strength required after pavement is 210 kg / cm 2 or more, when the pulverized waste concrete aggregate and the general aggregate are mixed as coarse aggregate of 5 mm or more, the general aggregate is within 50%. The concrete pavement method using waste concrete, characterized in that the total wear rate of the coarse aggregate to be less than 40% by mixing in the range. (Correction) The method according to claim 1, wherein when the concrete compressive strength required after the pavement is 250 kg / cm 2 or more, in the mixed use of the pulverized waste concrete aggregate and the general aggregate as the fine aggregate in the concrete mixture, the general sand is in the range of 100-80%. Concrete pavement method using waste concrete, characterized in that used by mixing. (Correction) The method according to claim 1, wherein when the concrete compressive strength required after pavement is 210-250 kg / cm 2, 80-50% of normal sand is used in mixing pulverized waste concrete aggregate and general aggregate as fine aggregate of concrete mixture. Concrete paving method using waste concrete, characterized in that used in the mixing range. (Correction) The method according to claim 1, wherein when the concrete compressive strength required after pavement is less than 210 kg / cm 2, the general sand is used within 50% of the mixed waste concrete aggregate and the general aggregate as the fine aggregate of the concrete mixture. Concrete pavement method using waste concrete, characterized in that used by mixing. (Correction) The crushed waste concrete residue according to claim 1, wherein when the required concrete compressive strength after packaging is less than 210 kg / cm 2, the strength can be maintained and the specific gravity of the surface dry saturated state of the aggregate is 2.50 or more. Concrete pavement method using waste concrete, characterized in that 100% as a fine aggregate of concrete mix. (Correction) The process according to claim 1, comprising the step of selecting at least one of water-soluble acrylic resin, water-soluble epoxy, EVA, SBR latex, or emulsified asphalt and adsorbing it to the crushed waste concrete coarse aggregate to reinforce the strength of the aggregate. Concrete paving method using waste concrete. (Twice correction) The method according to claim 1, wherein No.467, No.57, and No.67 particles of KSF2575 are coarse aggregates among the sorted and screened crushed waste concrete particles, and within 30% of the coarse aggregates are general. Cement 250-450kg for the maximum compaction weight of 1㎥ of sand, coarse aggregate and sand, water-cement ratio 25-45% based on surface dry condition of aggregate, water-resistant agent within 2% of cement usage Compounding; Laying concrete of electric process and then compacting with Laura at 93% or more of the compaction density determined by KSF2312 to form a porous concrete layer for the base layer having a compressive strength of 100-250kg / m ³ and a porosity of 4-12%; After compaction of the electrical processes within an hour, for a maximum compaction by weight of less than 5mm 1m ³ of sand cement 300-700kg, water-based cement with a mix of 25-40% water reducing agent is less than 2% of cement consumption Laying mortar within 3 cm and then compacting with Laura; And A step of spraying polymer or emulsified asphalt on the surface in a dry state after curing for two days or more according to a conventional method; Concrete paving method using peconcrete containing. (Twice correction) The method according to claim 1, wherein No.357, No.467, No.57, and No.67 particles of KSF2527 are coarse aggregates among the sorted and screened crushed waste concrete particles, and 30% of the total aggregate amount. 250 ~ 500kg of cement for 1㎥ of the maximum compaction weight of coarse aggregate and fine aggregate, and water-cement ratio of 25-40% of water and cement within 2% of cement usage Mixing the concrete by mixing the water reducing agent; Laying concrete of electric process and then compacting with Laura at 93% or more of compaction density determined by KSF2312 to form compacted concrete layer for base layer with compressive strength of 150-300kg / m ³ and porosity 10%; And Within 1 hour after compaction of the electrical process, concrete pavement and jointing and curing according to a conventional method thereon; Concrete paving method using peconcrete containing. (Twice correction) The method according to claim 1, wherein No.357, No.467, No.57, and No.67 particles of KSF2527 are coarse aggregates among the sorted and screened crushed waste concrete particles. Mixing concrete by mixing 250-500 kg of cement with respect to 1 m3 of the combined maximum compaction weight, water with a water-cement ratio of 25-40%, and a water reducing agent within 2% of the amount of cement, based on the surface dryness of the aggregate; Laying concrete of electric process and then compacting with Laura at 93% or more of compaction density determined by KSF2312 to form compacted concrete layer for base layer with compressive strength of 150-300kg / m ³ and porosity 10%; And Curing after the compaction of the electrical process according to a conventional method and packing ascon on top; Concrete paving method using peconcrete containing. (Twice correction) The grinding waste according to claim 1, wherein No.357, No. 467, and No. 57 particles of KSF2575 are coarse aggregates among the sorted and screened waste concrete particles, and within 70% of the total aggregate amount. Concrete residual particles are mixed, and 60-200kg of cement for 1m3 of the maximum compaction weight of these crushed waste concrete aggregates, 30-50% of water-cement ratio based on surface dryness of aggregates, and less than 2% of cement usage Mixing the concrete by mixing the water reducing agent; Laying concrete of electric process and then compacting with Laura at 93% or more of compaction density determined by KSF2312 to form lean concrete layer with compressive strength of 10-50kg / m ³ and porosity of 20%; And General road pavement and jointing and curing according to a conventional method on the upper lean concrete layer; Concrete paving method using peconcrete containing. (Twice correction) The method according to claim 1, wherein No.467, No.57, No.67, No.78, and No.7 particles of KSF2527 are coarse aggregates among the sorted and screened crushed waste concrete particles. Within 20% of the crushed waste concrete particles, 250-450kg of cement for 1㎥ of the maximum compaction weight of these aggregates, water of 25-45% of water-cement ratio, and 2% of the amount of cement Mixing the concrete by mixing the water reducing agent; The concrete of the electric process is laid according to the conventional method and compacted with a compaction rate of 93% or more of the compaction density determined by KSF2312, so that the permeable concrete layer for bases having a compressive strength of 120-250kg / m ³ and a permeability coefficient of 10 ^-2 cm / sec or more Forming step; General aggregates are mixed within 50% of the crushed waste concrete which passes 80-100% at 8mm, 40-80% at 5mm and 0-40% at 2.5mm so that the wear rate of the total aggregate is 40% or less. After adsorbing the polymer or emulsified asphalt to the electropulverized waste concrete, the durability is strengthened, and 250-450kg of cement is used for the maximum compaction weight of the electropulverized waste concrete and general aggregate by 1㎥. Mixing concrete by mixing water with a cement ratio of 25-40% and a water reducing agent within 2% of the amount of cement used; After laying concrete of electric process on top of permeable concrete layer for base layer by conventional method, it compacted with Laura at 93% or more of compaction density determined by KSF2312, compressive strength 120-250kg / m ³ , permeability coefficient 10 ^-2 cm / forming a permeable concrete layer for the surface layer to be sec or more; Joint treatment and curing according to a conventional method; Concrete paving method using peconcrete containing. (Twice correction) The grinding according to claim 1, wherein among the sorted and screened crushed waste concrete particles, the particle size passes 80-100% at 8mm, 40-80% at 5mm and 0-40% at 2.5mm General aggregates are mixed within 50% of the waste concrete aggregate so that the wear rate of the total aggregates is 40% or less, and then the polymer or emulsified asphalt is adsorbed on the electropulverized waste concrete to enhance durability. Mixing concrete by mixing 250-450 kg / m ³ of cement on the basis of the maximum compaction weight, water having a water-cement ratio of 25-40% based on the dry state of the aggregate, and a water reducing agent within 2% of the amount of cement used; After laying the concrete of the electric process according to the conventional method, it is compacted with Laura at 93% or more of the compaction density determined by KSF2312, so that the compressive strength is 120-250kg / m ³ and the permeability coefficient is 10 ^-2 cm / sec or more. Forming a concrete layer; And Joint treatment and curing according to a conventional method; Concrete paving method using peconcrete comprising a. (Correction) The concrete paving method using waste concrete according to claim 9, wherein in forming the porous concrete layer for the base layer, water is sprayed upon laying and compacting. (Correct) The concrete pavement method using waste concrete according to claim 10 or 11, wherein in forming the ground compacted concrete layer, water is sprayed upon laying and compacting. (Correct) The concrete pavement method using waste concrete according to claim 13 or 14, which is sprayed upon laying and compacting. (Correction) The method according to claim 13 or 14, wherein at least one of a water-soluble acrylic resin, a water-soluble epoxy, EVA, SBR latex, or emulsified asphalt is selected, and dried by spraying about 1 kg per 1 m ² on the surface of the pavement after curing. Concrete paving method using waste concrete, including the process. (Twice Correction) The waste concrete is crushed to pass No.357, No.467, No.57, No.7, No.78 particles of KSF2575, 80-100% at 8mm and 40-80% at 5mm And classifying the particles into particles that pass 0-40% at 2.5 mm, 40 mm-5 mm particles, and particles of 5 mm or less; Among the particles of the above process, the aggregate is selected so that the absolute aggregate weight is 1.8 or more, the absorption rate is 8.0% or less, and the washing loss is 1.0% or less for the coarse aggregate of 5 mm or more, and the absolute dry weight is 1.8 or more for the fine aggregate of 5 mm or less, Sorting the pulverized waste concrete aggregate such that the water absorption rate is 15% or less and the washing loss amount is 8.0% or less; Among the pulverized waste concrete classified and screened in the above processes, coarse aggregates of 13-5mm and fine aggregates of 5mm or less are mixed at a ratio of 1: 9 to 7: 3, and cement 300- 500kg, a water-cement ratio based on the surface dry saturation state of the aggregate, water-cement ratio of 20-35% range, the step of mixing the water reducing agent within the range of 2% of the amount of cement used in the mold and vibrating pressure; Common sand and up to more than 5mm KSF2526 of compaction with respect to the cement sand 1m ³ by weight 250-500kg, with surface drying saturation based on the aggregate of water-cement ratio based on less than 2% of water, a cement amount of the 20-35% range A step of oscillating and pressurizing the front filling material containing the water reducing agent in the range of the upper step of the electrical process; and Curing the molded block of the electrical process according to a conventional method; Press block manufacturing method using waste concrete comprising a. 20. The method of claim 19, further comprising a step of spraying the water and polymer or emulsion asphalt 1: 5 on the surface of the block after curing and spraying it to the inside.

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