KR101363860B1 - A super high early strength concrete composition using the eco-friendly cycling silica sand and repairing method of concrete pavement using the same - Google Patents

Abstract

The present invention relates to a super high early strength concrete composition using eco-friendly recycled silica sand as a fine aggregate and a repairing method of concrete pavement using the same and more specifically, to a super high early strength concrete composition using eco-friendly recycled silica sand as a fine aggregate and a repairing method of concrete pavement using the same by drying a recycled fine aggregate according to a drying process among producing processes of recycled aggregate from a waste concrete at high temperatures; using, as a fine aggregate, recycled aggregate which is produced after removing foreign substances using wind power and processing the resultant product into sizes of silica; and using a find powder of a dried powder which is produced as a by-product during the previous process as a substitutes of cement. The present invention of the super high early strength concrete composition using eco-friendly recycled silica sand as a fine aggregate comprises 7-16 weight% of super high early strength concrete binder; 28-45 weight% of fine aggregate; 25-50 weight% of coarse aggregate; 1-7 weight% of water; 1-15 weight% of synthetic polymer to make 100 weight% of the composition. There is a technical significance that 100 weight% of the fine aggregate includes 20-100 weight% recycled silica. [Reference numerals] (AA) Start; (BB) End; (S110) Step of exposing a sound area by removing a deteriorated part or a damaged part; (S120) Step of cleaning the sound area which is to be exposed; (S130) Step of inserting a super high early concrete composition in the sound area; (S140) Step of flattening the sound area in which the super high early concrete composition is inserted; (S150) Step of performing surface treatment in the sound area; (S160) Step of forming a thin film on the sound area

Description

A super high early strength concrete composition using the eco-friendly cycling silica sand and repairing method of concrete pavement using the same}

The present invention relates to a super-tough steel concrete composition using an environmentally-friendly recycled silica as a fine aggregate and a concrete pavement repair method using the same, and more specifically, high-temperature drying of the fine aggregate circulated aggregate by the dry process in the process of producing recycled aggregate from waste concrete By using the wind power to remove foreign substances and processing them to the size of silica sand, circulating silica produced as fine aggregate is used.In this process, eco-friendly circulating silica using dry concrete fine powder, which is a dry fine powder produced as a by-product, is used as cement substitute. It relates to a super-tight steel concrete composition and concrete pavement repair method using the same.

Due to the recent urban redevelopment projects and the expansion of social infrastructure, a huge amount of by-products are being generated at domestic construction sites. According to 2009 Ministry of Environment statistics, by-products of the construction industry account for 51% of the total waste. . Its annual total generation amounted to 6,692 million tons, which increased by 595% (60% per year) for 10 years, and the waste concrete, which accounts for the largest proportion (63.0%) of the construction industry by-products, is generating about 43.13 million tons per year. .

In Korea, there are many factors that hinder recycling due to the lack of recycling infrastructure such as recycling support for waste concrete, and the cost of treatment increases every year due to waste generation due to waste disposal and dismantling work.

Prior art Korean Patent Publication No. 10-0975581 and Korean Patent Registration Publication No. 10-1019073 describe the manufacture of ultra-tough steel concrete composition or road pavement repair method using the same. Along with cement, gravel, crushed stone, crushed stone, crushed sand, and natural sand are commonly used as main components of mortar or concrete.

In addition, the supply of natural aggregate is not smooth due to the recent shortage of natural aggregates for concrete, and in the future, strict regulations are expected for river aggregate collection and quarry development according to river maintenance and environmental preservation. There is a problem that may not be.

In addition, because of the nature of the renovation work aggregates are purchased directly from each local aggregate producers, there is a problem that it is difficult to select and purchase high-quality aggregates, the aggregate quality is heterogeneous depending on the region.

In addition, there is a problem that the correction and on-site management difficulties due to the aggregate variation occurs every time the concrete composition is mixed, and by including the expensive latex, there is also a problem that the manufacturing cost is increased because the quality of the concrete composition is improved.

In addition, the problem of environmental pollution has emerged as carbon dioxide is discharged due to the use of a lot of cement.

In addition, the design level of service in Korea is changing the design level in consideration of the characteristics of each road type. Accordingly, in the case of domestic expressways, the difference in daily traffic volume is somewhat large for each lane, and the service level according to the daily traffic volume can be classified into A to E grades as shown in Table 1.

Service level (unit: number of vehicles) A B C D E 4th 23,000 38,300 52,000 68,200 85,300 Primary 5,750 9,575 13,000 17,050 21,325

Service level A means the best condition, and E level means the worst. In addition, the repair method is applied differently according to the service level, and as the classification, the rough steel which can open traffic for 4 hours in the case of D or E grade, and the first wave that can open the traffic for 12 to 24 hours in the case of B or C grade In the case of steel concrete, grade A, the crude steel concrete, which can be opened for 72 hours, is used. Accordingly, research on ultra-tough steel concrete using eco-friendly circular sand as fine aggregate is needed.

The present invention has been made in order to solve the problems of the prior art as described above is an object for producing a concrete repair material containing high-quality eco-friendly circular silica in order to maintain the quality homogeneity of the assembly rate, surface water, particle size, etc. have.

In addition, the present invention has another object to improve the quality of the concrete repair material and to increase the recycling of construction waste by producing a concrete repair material containing environmentally friendly circulating silica.

In addition, the present invention is another object to prevent the deterioration of the concrete quality due to exhaustion of natural aggregates, and to provide a roughened steel concrete composition that can perform a cost reduction.

In addition, the present invention has another object to reduce the amount of carbon dioxide by using the waste concrete fine powder as a cement substitute.

In addition, the present invention has another object to prevent the deterioration of concrete by blocking the penetration of chloride or water in the concrete repair material.

In addition, the present invention is another object to develop a low-strength steel concrete that can secure the strength and durability of 12 to 24 hours while being cheaper than the high-strength steel cement applicable to the service level B or C grade route.

The object of the present invention is in a rough steel concrete composition, the rough steel concrete composition is 7 to 16% by weight of the cement cement binder and 28 to 45% by weight of fine aggregate and 25 to 50% by weight of coarse aggregate and 1 to 7 Made from 100% by weight, including 1% by weight of water and 1 to 15% by weight of synthetic polymer, wherein the fine aggregate comprises 20 to 100% by weight of circulating silica in 100% by weight. It is achieved by the steel sheet concrete composition used as.

In addition, another object of the present invention in the concrete pavement repair method using the super-tight steel concrete composition prepared by claim 1, the first step of removing any one or more of the deterioration or damage of the road to expose the healthy portion And a second step of injecting the first and second steel concrete compositions into the sound field, and a third step of flattening the surface of the first and second steel concrete compositions and forming a film. It is achieved by concrete pavement repair method.

The present invention devised to solve the problems of the prior art as described above can produce and maintain a concrete repair material containing high-quality environmentally circulating silica, can maintain and improve the quality homogeneity of the assembly repair rate, surface water, particle size, etc. It has an effect.

In addition, the present invention is to produce a concrete repair material containing environmentally friendly circulating silica, there is another effect that can improve the quality of the concrete repair material and expand the recycling of construction waste.

In addition, the present invention provides a super-tough steel concrete composition, there is another effect that can prevent the decline in concrete quality due to natural aggregate depletion and perform cost reduction.

In addition, the present invention has another effect of preventing the degradation of concrete by blocking the penetration of chloride or moisture into the concrete repair material.

In addition, the present invention has another effect that can reduce the material cost and construction cost by reducing the content of the super-tight steel cement and latex contained in the concrete repair material.

1 is a flow chart for showing a concrete pavement repair method using the steel sheet composition according to the present invention,
Figure 2 is a reference diagram for showing the eco-friendly circulating silica and waste concrete fine powder according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, preferred embodiments of the present invention will be described in detail.

The super rough steel concrete composition of the present invention is 7 to 16% by weight cemented cement binder, 28 to 45% by weight fine aggregate, 25 to 50% by weight coarse aggregate, 1 to 7% by weight water and 1 to 15 synthetic polymer It is prepared by blending in a weight percent, and contains about 20 to 100% by weight of environmentally friendly circulating silica in 100% by weight of the fine aggregate.

The circulating silica should satisfy the particle size specified in KS F 2526 (concrete aggregate) and the quality as shown in the following <Table 2>.

division Circular silica Absolute Dry Density (g / cm 3) 2.2 or higher Absorption Rate (%) 5.0 or less Wear loss (%) - Particle shape judgment rate (%) 53.0 or higher 0.08 mm Amount lost in the sieve amount test (%) 7.0 or less Alkali aggregate reaction Harmless Clay mass (%) 1.0 or less safety(%) 10
Foreign matter content (%) Organic foreign matter 1.0 or less (volume) Inorganic foreign matter 1.0 or less (mass)

In other words, circulating silica is a process of producing waste concrete from recycled aggregates, drying the recycled fine aggregate produced by the dry process at high temperature, removing foreign substances by wind, and processing the same size as artificial silica. It is produced through and the particle size is 0.15 to 5.0mm, it is preferred that the water absorption is 5% or less.

The inclusion of less than 28% by weight of fine aggregates in the super-strength steel concrete composition results in poor tying and finish, and in excess of 45% by weight, the water-cement ratio may increase, leading to a decrease in strength. Therefore, the fine aggregate contained in the superstructure steel composition is most preferably contained in 28 to 45% by weight.

On the other hand, the cemented steel cement binder is 20 to 50% by weight of cemented steel portland cement, 5 to 20% by weight of CSA cemented carbide, 10 to 40% by weight of blast furnace slag, 5 to 20% by weight of waste concrete powder It is prepared by mixing 10 to 40% by weight of anhydrous gypsum, 0.5 to 2% by weight of shrinkage reducing agent, 0.1 to 5% by weight of thickener, and 0.1 to 2% by weight of a high performance water reducing agent.

The crude steel portland cement included in the cemented steel cement binder is Portland cement which is harder than the crude steel portland cement, and has a large amount of tricalcium silicate having high hydration activity. Particularly, if the content of the steelmaking cement is less than 20% by weight in 100% by weight of the steelmaking Portland cement binder, the initial strength is lowered, and when the content of the steelmaking cement exceeds 50% by weight, the condensation time is fast, resulting in problems in workability. Therefore, it is preferable that the crude steel portland cement contained in 100 wt% of the crude steel portland cement binder is contained in 20 to 50 wt%.

If the content of CSA cement is less than 5% by weight in 100% by weight of the cemented steel cement binder, the rate of early strength development is slowed down, and when it exceeds 20% by weight, the condensation time is rapidly increased. Difficult to secure the problem, economical deterioration and high heat of hydration is generated during the curing process may cause temperature cracking of the cemented steel cement binder. Therefore, it is preferable that the CSA (super fast mirror) cement contained in 100 wt% of the superhard steel cement binder is contained in 5 to 20 wt%.

The blast furnace slag powder contained in the cemented steel cement binder is used for long-term strength development, permeability resistance and durability enhancement. When the blast furnace slag powder is used in less than 10% by weight of 100% by weight of the cemented steel cement binder, the effect of reducing heat of hydration is inferior. Preference is given to mixing 40% by weight.

The waste concrete fine powder used in the cemented cemented steel cement binder is composed of 100 wt% of the waste concrete fine powder, the main component of which is at least 30 wt% of SiO _2, at least 25 wt% of CaO, and at least 2,000 cm ₂ of powder, especially of SiO _2. To 43% by weight, CaO is preferably included 25 to 30% by weight. Waste concrete powder is used as a cement substitute and grouting filler, and the alkaline component of waste concrete powder promotes latent hydraulic reaction of blast furnace slag fine powder to help develop long-term strength and improve durability of super-tension steel concrete. When the content of the waste concrete fine powder is contained in less than 5% by weight of 100% by weight of the cemented steel cement binder, the initial strength is lowered, and when the content exceeds 20% by weight, the absorption rate is high, resulting in a problem of workability deterioration. Therefore, the finely divided waste concrete powder contained in 100% by weight cemented carbide cement binder is most preferably contained in 5 to 20% by weight.

Meanwhile, the waste concrete fine powder is a dry fine powder generated as a by-product from the fine aggregate production process, and selects the dry fine powder to be included in the cemented cement cement material.

Anhydrous gypsum, which is included in the cemented steel cement binder, is used for the initial strength development. When the content of the anhydrous gypsum is increased, it may exhibit rapid curing characteristics. If the content is less than 10% by weight, the initial strength of the concrete composition When weakened and exceeding 40 weight%, there exists a problem that workability falls because of fast hardening characteristic. Therefore, it is most preferable that the anhydrous gypsum contained in 100 wt% of the cemented carbide cement binder is contained in an amount of 10 to 40 wt%.

Shrinkage reducing agent included in the cemented steel cement binder is preferably used polyether-based powder shrinkage reducing agent (SRA), the shrinkage reducing agent is less than 0.5% by weight in 100% by weight of the cemented steel cement binder. When contained, the effect of shrinkage reduction is inferior, and when contained in excess of 2% by weight, a problem of strength decrease occurs, so that mixing of 0.5 to 2% by weight is preferable.

Thickeners included in the cemented steel cement binder include methyl cellulose, starch and gum, but it is preferable to use a starch thickener having a low strength decrease. The thickener is preferably mixed from 0.1 to 5% by weight in 100% by weight of the steel cement binder.

The high-performance water reducing agent included in the super-steel composition is preferably used including any one or more of naphthalene sulfonate-based condensate, melamine formalin sulfonate-based condensate, polycarbonate-based condensate. These high performance water reducing agents are used to improve the strength and durability by reducing the water and cement ratio of the composition, the content of the high performance water reducing agent is preferably mixed 0.1 to 2% by weight in 100% by weight of the cemented steel cement binder.

Synthetic polymers are used to increase the resistance to cracking caused by vibration and plastic shrinkage due to repetitive passage, one of the important characteristics required for cross-linked pavement concrete.

Thus, the synthetic polymer is methyl methacrylate (MMA) of 27 to 60% by weight, ethyl acrylate (EA: ethyl acrylate) of 37 to 70% by weight, vinyl carboxylic acid (vinyl carboxylic acid) 0.1 To 3% by weight, 1 to 5% by weight of a nonionic surfactant (silicone antifoaming) and 1 to 2% by weight of a nonionic surfactant (silicone antifoaming) is used in combination.

In particular, if the content of methyl methacrylate (methyl methacrylate) in the 100% by weight of the synthetic polymer is less than 27% by weight, the adhesion strength and durability of the super-strength steel concrete composition may be lowered, unstable when exceeding 60% by weight Since bonding may occur, the content of methyl methacrylate (methyl methacrylate) is preferably mixed with 27 to 60% by weight.

In addition, when the content of ethyl acrylate (EA) is less than 37% by weight of the synthetic polymer of 100% by weight of the unstable bonding of the super-tough steel concrete composition may occur, when the strength exceeds 70% by weight Since the problem may occur, the content of ethyl acrylate (EA: ethyl acrylate) is most preferably mixed 37 to 70% by weight.

Furthermore, in 100% by weight of the synthetic polymer, 0.1 to 3% by weight of vinyl carboxylic acid, 1 to 5% by weight of nonionic surfactant, and 1 to 2 of silicone antifoaming. It is preferable to be contained in weight%.

Figure 1 is a flow chart for showing the concrete pavement repair method using the super-tough steel concrete composition according to the present invention. As shown in FIG. 1, after confirming the deterioration site and the degree of deterioration generated in the pavement layer of the road, the deterioration part and the damage part are removed to expose the healthy part (S110).

Deterioration and damage can be removed by cutting using equipment such as a breaker, a room temperature cutter, and a water jet, and the deterioration and damage may be cut and removed to expose the whole body. Do enough to work.

Since the deterioration part and the damaged part are removed through equipment such as a breaker, a room temperature cutter, and a water jet, the debris and the deterioration part are cleaned of debris existing in the exposed deteriorated part because a large number of debris is generated on the surface and side ( S120).

The cleaning of the exposed healthy part is to secure the adhesion of the material. The cutting surface of the healthy part is cleaned using sand blasting equipment, high pressure water equipment containing abrasives, and water blasting equipment. Can be washed

Subsequently, to produce a roughened steel concrete composition according to the present invention, and put the resulting roughened steel concrete composition in the healthy portion (S130). At this time, the resulting steel concrete composition may be a method such as an on-site mixer (forced or calibrated), a batch plant (batcher plant) and a mobile mixer (mobile mixer), and the aggregate aggregate included in the super-steel steel composition circulating aggregate It is preferable to include.

Next, planarize the healthy portion in which the super-strength steel concrete composition is injected (S140). Planarization may use equipment such as screed, roller tubes, and roller paper.

Subsequently, the surface treatment is performed on the sound field where the planarization operation is completed (S150). Surface treatment of step S150 is preferably performed by grooving or tinning to increase vehicle load and slip resistance of the repaired concrete pavement.

Finally, a film is formed on the surface of the soundproof part where the surface treatment is completed (S160). That is, the reason why the super-tough steel concrete composition is added to form a coating on the soundproof surface where the surface treatment is completed is to suppress the evaporation of the concrete surface moisture so that sufficient hydration reaction occurs. On the other hand, the healthy portion formed with the coating is sprayed with a curing material so as to be less affected by temperature changes.

Figure 2 is a reference diagram for showing the environmentally friendly circular silica in accordance with the present invention. As shown in Figure 2, (a) is a circulating silica according to the present invention, (b) is a crushed aggregate crushed aggregate, (c) is a natural sand and (d) is a waste concrete fine powder. That is, as a result of comparing the (a) circulating silica according to the present invention with (b) crushed aggregate, which is included in the conventional steel sheet concrete composition, (c) the aggregate most similar to natural sand can be seen that (a) circulating silica , (a) Ultra-tough steel concrete composition using circulating silica sand prevents the strength improvement and quality deterioration compared with conventional (b) the steel-tight steel concrete composition using crushed aggregate.

An embodiment using the above-described steel steel concrete composition and steel cement cement binder is presented in detail as follows. On the other hand, the present invention is not limited by the embodiments presented.

&Lt; Example 1 >

15 wt% cemented steel cement binder, 38 wt% fine aggregate, 38 wt% coarse aggregate were added to the mixer for 30 seconds to dry mix, then 3 wt% water and 6 wt% synthetic polymer were added and stirred for 30 seconds A concrete composition was produced. At this time, the fine aggregate contained in the super-tough steel concrete composition was used 100% by weight of circulating silica with respect to 100% by weight of fine aggregate.

On the other hand, the cemented steel cement binder is made of 55% by weight of cement steel, 10% by weight of CSA cement, 15% by weight of blast furnace slag, 10% by weight of waste concrete, 5% by weight of anhydrous gypsum, shrinkage reducing agent 2 Weight%, Thickener 1.5% by weight, High Performance Reducer 1.5% by weight was used.

In addition, the synthetic polymer is methyl methacrylate (MMA: methyl methacrylate) 56% by weight, ethyl acrylate (EA: ethyl acrylate) 38% by weight, vinyl carboxylic acid (vinyl carboxylic acid) 2% by weight, ratio 3 wt% of the nonionic surfactant and 1 wt% of the silicone antifoaming were used.

<Example 2>

15 wt% cemented steel cement binder, 38 wt% fine aggregate, 38 wt% coarse aggregate were added to the mixer for 30 seconds to dry mix, then 3 wt% water and 6 wt% synthetic polymer were added and stirred for 30 seconds A concrete composition was produced. At this time, the fine aggregate contained in the super-tough steel concrete composition was used by 50% by weight of natural fine aggregate and 50% by weight of circulating silica with respect to 100% by weight of fine aggregate.

On the other hand, the cemented cement cement material is 55% by weight of crude steel portland cement, 10% by weight CSA cement, 15% by weight of blast furnace slag, 10% by weight of waste concrete, 5% by weight of gypsum anhydrous, shrinkage reducing agent 2% %, Thickener 1.5% and high performance water reducer 1.5% by weight were used.

In addition, the synthetic polymer is methyl methacrylate (MMA: methyl methacrylate) 56% by weight, ethyl acrylate (EA: ethyl acrylate) 38% by weight, vinyl carboxylic acid (vinyl carboxylic acid) 2% by weight, ratio 3 wt% of the nonionic surfactant and 1 wt% of the silicone antifoaming were used.

&Lt; Comparative Example 1 &

15 wt% cemented steel cement binder, 38 wt% of fine aggregate, 38 wt% of coarse aggregate were added to the mixer for 30 seconds to dry mix, then 3 wt% of water and 6 wt% of SB-Latex were added and stirred for 30 seconds. A latex modified concrete composition was prepared.

Comparative Example 2

15 wt% of the cemented steel cement binder, 38% by weight of the aggregate, 38% by weight of the coarse aggregate was added to the mixer for 30 seconds, the mixture was dried for 30 seconds, and then 9% by weight of water was further added to prepare a steel composition for the rough steel.

Table 3 below shows various test results for <Example 1> to <Example 2> and <Comparative Example 1> to <Comparative Example 2>.

Remarks Test Items Reference value Example 1 Example 2 Comparative Example 1 Comparative Example 2 Remarks rescue
characteristic
Compressive strength
(MPa) 12 hours 21 or more 25.4 27.5 22.3 20.2
KS F
2405 24 hours 21 or more 28.2 32.1 26.1 24.1 28th 27 or more 36.7 40.2 33.4 38.0
Flexural strength
(Mpa) 12 hours
3.15 or later 6.2 6.4 5.8 2.4
KS F
2408 24 hours 7.2 7.7 6.1 2.6 28th 8.3 8.7 6.8 4.1
Bond strength
(MPa) 12 hours
1.4 or higher 1.8 1.9 1.4 0.8
KS F
2762 24 hours 2.1 2.3 1.6 1.0 28th 2.8 2.9 1.8 1.2 fitness
characteristic Drying shrinkage
(%)
1-7 days
0.15 or less
-0.05
-0.04
-0.1
-0.16 KS F
2424 Endurance
characteristic Chlorine ion
Penetration resistance
(coulombs)
14 days
2,000 or less
435
380
1,400
4,200
KS F
2711 28th 1,000 or less 254 215 870 2,600 Wear resistance
(Mm) 14 days 2 mm or less
(30 minutes) 1.2 1.1 1.8 2 ASTM C
779 B method 28th 0.8 0.7 1.5 1.8 Freeze thawing
Resistance
(%)
14 days
More than 80
89
89
82
56 KS F 2456
(300 cycle -A method) 28th More than 80 92 92 86 67
Crack resistance
56 days Structure drying
No shrink crack crack
none crack
none crack
none
crack ASTM C 1581

According to the test results indicated in <Table 3>, the <Example 1> and <Example 2> using the circulating silicate to confirm the high strength characteristics and durability compared to the <Comparative Example> by using the optimum particle size and high quality circulating silica It can be, and the cost is reduced by significantly reducing the use of expensive super-steel cement and latex.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

(a) circulating silica (b) crushed aggregate
(c) natural sand (d) waste concrete fine powder

Claims (13)

In the roughened steel concrete composition,
The ultra-tough steel concrete composition
7-16% by weight of the cemented steel cement binder;
28 to 45 weight percent fine aggregate;
25 to 50% by weight of coarse aggregate;
1 to 7 weight percent water; And
1 to 15% by weight of synthetic polymer
Consists of 100% by weight, including 20 to 100% by weight of circulating silica in 100% by weight of the fine aggregate, the cemented steel cement binder is 20 to 50% by weight of cemented steel portland cement, 5 to 20% by weight CSA cemented carbide, 10-40 wt% blast furnace slag fine powder, 5-20 wt% waste concrete fine powder, 10-40 wt% anhydrous gypsum, 0.5-2 wt% shrinkage reducing agent, 0.1-5 Ultra-tough steel concrete composition using environmentally-friendly circulating silica as a fine aggregate, characterized in that produced by 100% by weight, including a weight percent thickener and 0.1 to 2% by weight of a high performance water reducing agent.
delete The method of claim 1,
The circulating silica is produced through the process of removing foreign matters by the wind from the circulating fine aggregate produced by the dry process in the process of producing the waste concrete as circulating aggregate, and the process of processing the same size as the artificial silica sand, Ultra-tough steel concrete composition using an environmentally-friendly circulating silica sand as a fine aggregate, characterized in that the particle size is 0.15 to 5.0 mm, the absorption rate is 5% or less.
The method of claim 1,
The waste concrete fine powder comprises 30 wt% or more of SiO ₂ and 25 wt% or more of CaO as the main component in 100 wt% of the fine concrete powder, and has an environmentally-friendly circulating silica characterized in that the powder degree is 2,000 cm2 / g or more. Ultra-tough steel concrete composition used as fine aggregate.
5. The method of claim 4,
The waste concrete fine powder is made of super-strength steel concrete composition using environmentally friendly circulating silica as a fine aggregate, characterized in that the dry fine powder generated as a by-product in the production process of the fine aggregate.
The method of claim 1,
The synthetic polymer
27 to 60% by weight methyl methacrylate;
37 to 70% by weight of ethyl acrylate;
0.1 to 3 weight percent vinyl carboxylic acid;
1-5% by weight of nonionic surfactant; And
1 to 2 weight percent silicone antifoaming
Ultra-tough steel concrete composition using environmentally-friendly circulating silica as a fine aggregate, characterized in that it is produced in 100% by weight.
The method of claim 1,
The high-performance water-reducing agent is a super-strength steel concrete composition using environmentally friendly circulating silica as a fine aggregate, characterized in that any one or more of naphthalin sulfonate-based, melamine formalin resin sulfonate-based or polycarboxylic acid-based.
In the concrete pavement repair method using the first steel composition of claim 1,
A first step of removing at least one of the deterioration part or the damage part of the road to expose the sound part;
A second step of injecting the ultra-tough steel concrete composition into the healthy part; And
A third step of flattening the surface of the ultra-tough steel concrete composition and forming a film
Concrete pavement repair method using an ultra-tough steel concrete composition that uses environmentally friendly circulating silica including fine aggregates.
The method of claim 8,
After the healthy part is exposed in the first step, the cutting surface of the healthy part is cleaned by using any one or more of sand blasting equipment, high pressure water equipment containing abrasives, or water blasting. Concrete pavement repair method using an ultra-tough steel concrete composition using an environmentally-friendly circular silica sand as a fine aggregate.
The method of claim 8,
Removal of any one or more of the deterioration portion or the damage portion of the road in the first step is an aggregate of environmentally-friendly recycled silica, characterized in that using any one or more of a breaker (breaker), a room temperature cutter or a water jet (water jet). Concrete pavement repairing method using the super-tight steel concrete composition used as a.
The method of claim 8,
The ultra-tough steel concrete composition is concrete using an ultra-tough steel concrete composition using environmentally friendly circulating silica as a fine aggregate, characterized in that it is produced using any one or more of an on-site mixer, a batch plant or a mobile mixer. Pavement repair method.

The method of claim 8,
In the third step, the planarization uses any one or more of screed, roller tube, or roller paper, and after the planarization, grooving or tinning. The concrete pavement repair method using the super-tough steel concrete composition using the environmentally-friendly circulating silica sand as a fine aggregate, characterized in that to perform the surface treatment and to form the coating by.
13. The method of claim 12,
Concrete pavement repair method using the super-tough steel concrete composition using environmentally-friendly circulating silica as a fine aggregate, characterized in that the curing agent is sprayed on the soundproof part formed with the coating.

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