KR101405370B1 - Compositions containing recycle material, and method for repairing and reinforcing sections of concrete constructions using the double mixer shaft - Google Patents

Abstract

The present invention relates to a cross section repairing and reinforcing method using a composition containing a recycle material and a double mixer shaft by using a composition comprising a base material part including the weight ratio of 10 : 1-5 : 1-5 : 3-10 : 1-5 of portland cement : vinyl acetate emulsion copolymer resin : Styrene butadiene emulsion copolymer resin : briquette ashes : ore, based on 100 parts by weight of the base material part 5-20 parts by weight of waste vinyl powder; 5-15 parts by weight of styrene-butadiene rubber; 1-10 parts by weight of amorphous non-quartz silica; and 1-10 parts by weight of carboximide. The present invention has an effect of being effectively used in a road, etc. in which the erosion or corrosion of cement is frequently generated due to excellent strength and durability; and being applicable for a waterproof structure such as roof slab waterproofing, a swimming pool, a water purification plant, etc. due to excellent watertightness and little contraction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double mixer shaft and a method of manufacturing a double mixer shaft,

TECHNICAL FIELD [0001] The present invention relates to a composition for a section maintenance and reinforcement which is excellent in strength and durability and which can be effectively used on a road where a lot of cement corrosion and erosion occurs, a section maintenance and reinforcement method using the same, and a freeze injection apparatus equipped with a mixer shaft .

Concrete is used to construct buildings by mixing cement, sand, and water, or to construct various civil engineering structures such as roads, bridges, harbors, dams, tunnels, circular pipes, etc. The interior is mainly reinforced with reinforcing bars. In such a concrete structure, due to internal factors such as weak alkali reaction such as crack, frost, saltation, neutralization, chemical erosion and the like, the outer wall of the concrete structure is aged due to changes in temperature, Cracks will occur. For example, in the case of reinforcing bars, since the rust expands up to 2.5 times the volume, the expansion pressure acts on the concrete, causing cracking in the direction of the reinforcement of the reinforcing bars, and also causing peeling and peeling.

Among the technologies related to conventional repair and reinforcement of concrete, as disclosed in Korean Patent Publication No. 2004-0058537, when repairing a concrete structure, it is necessary to strengthen the adhesion between the existing concrete and the repair mortar and to maintain the durability of the structure for a long time Inorganic / crosslinking composite polymer coating composition for reinforcing interfacial adhesion of a new concrete having an inorganic polymer structure made of a metal alkoxide and a tall alcohol with a permeable alkoxysilane hybrid type interfacial adhesion promoter coating agent using a nano synthesis technique And a manufacturing method are known.

However, with the above-described conventional techniques, the base of sea salt, sea water, and calcium chloride for snow removal penetrates into the concrete over time, and the concrete is corroded. When the base penetrates in the state of moisture, the concrete expands and cracks, And can not sufficiently cover the pores caused by curing of concrete. Therefore, it can not satisfy the use of various structures requiring high strength, water resistance and durability. Therefore, the strength is lowered when the concrete is used on buildings, especially on the road, There is a problem that can not withstand acid, alkali, water and sunlight continuously.

In particular, the conditions under which the temperature changes repeatedly in the four climatic conditions of the four seasons, the condition that the surface of the concrete structure is always exposed to the wet condition due to the influence of the ground water, the conditions in which the wet and dry are repeated, The concrete structure is present under various conditions such as the existence condition, and it is likely to cause defects such as cracks, peeling, and dropout in the concrete structure regardless of the conditions.

It is known that conventional repair and reinforcement methods for concrete structures are capable of exerting some effects in the atmospheric environment. However, when used in concrete exposed to wet conditions, Peeling occurs. Also, it is pointed out that the reinforcement effect of the structure is remarkably lowered due to the elastic modulus lower than that of the concrete, and the adhesion strength is very low in the wet condition.

Therefore, there is a demand for a composition for repair and reinforcement of a concrete structure excellent in strength and durability and excellent in adhesion to existing concrete structures.

Korean Patent No. 0772622 Korean Patent No. 0883326 Korean Patent No. 0895497 Korean Patent No. 0690410

It is an object of the present invention to provide a composition for maintenance and reinforcement of a section which is excellent in strength and durability and excellent in adhesion to existing concrete structures.

Another object of the present invention is to provide a method of repairing and reinforcing the above-mentioned cross-sectional repair and reinforcement composition.

It is still another object of the present invention to provide a pre-wetting injection device equipped with a mixer shaft using the above-described composition for reinforcing a section repair.

(1) Portland cement: vinyl acetate emulsion copolymer resin: styrene butadiene emulsion copolymer resin: briquette: ore in a weight ratio of 10: 1 to 5: 1: 5: 3 (2) 5 to 20 parts by weight of waste vinyl powder, (3) 5 to 15 parts by weight of styrene-butadiene rubber, (4) 1 to 10 parts by weight of amorphous non-quartz silica and (5) 1 to 10 parts by weight of carboximide.

The waste vinyl powder may be one which has been treated with at least one enzyme selected from the group consisting of papain, bromelain, picin, and trypsin.

According to another aspect of the present invention, there is provided an aspect of the present invention, the method including: (a1) pre-treating a section of a concrete; (a2) drilling a reinforcement anchor; (a3) installing a fixture; (a4) providing a high tenacity glass fiber reinforcement or high tenacity carbon stiffener; (a5) removing the reinforcing steel rust; (a6) reinforcing the reinforcing bars; (a7) performing a high pressure water wash; And

(b1) a pre-wetting spraying device equipped with a mixer shaft for mixing and conveying the composition at the same time as the pre-wetting spraying device, Applying a repair and reinforcement composition comprising amorphous non-quartz silica and carboximide to a concrete section; (b2) spraying the finish material; (b3) curing step; (b4) applying a primer; (b5) applying a finish coating material.

The composition for maintenance and reinforcement is composed of (1) Portland cement: vinyl acetate emulsion copolymer resin: styrene butadiene emulsion copolymer resin: briquette: ore in a weight ratio of 10: 1-5: 1-5: 3-10: 1-5 (2) 5 to 20 parts by weight of waste vinyl powder, (3) 5 to 15 parts by weight of styrene-butadiene rubber, (4) 1 to 10 parts by weight of amorphous non-quartz silica, And (5) 1 to 10 parts by weight of carboximide.

The waste vinyl powder may be one which has been treated with at least one enzyme selected from the group consisting of papain, bromelain, picin, and trypsin.

According to another aspect of the present invention, there is provided a pre-wetting jetting apparatus comprising: a cementitious material selected from the group consisting of Portland cement, vinyl acetate emulsion copolymer resin, styrene butadiene emulsion copolymer resin, briquette material, ore, waste vinyl powder, styrene- And a mixer shaft for mixing and conveying the cross-section repair and reinforcement composition including non-quartz silica and carboxyimide,

The mixer shaft includes rod-shaped first and second shaft portions 100A and 100B rotatably installed in a conveying pipe provided at the silo outlet side of the apparatus, and first and second shaft portions 100A and 100B, respectively, of the first and second shaft portions 100A and 100B. And the blades 200A, 200B, 210A, and 210B formed in a spiral shape on the outer periphery, and the blades may be formed in a hollow shape so that the outer diameters of the blades are different along the axial direction of the shaft portion.

The mixer shaft further includes auxiliary shafts 300A and 300B having spiral blades 310A and 310B that are rotatably installed on the shafts at predetermined intervals in parallel to the first and second shafts 100A and 100B .

The auxiliary shafts 300A and 300B may be installed at the rear end portions of the shaft portions 100A and 100B on both sides of the shaft portion.

The auxiliary shafts 300A and 300B may have both ends rotatably coupled to supporting portions 320A and 320B fixed to the shaft portions 100A and 100B.

The composition for maintenance and reinforcement is composed of (1) Portland cement: vinyl acetate emulsion copolymer resin: styrene butadiene emulsion copolymer resin: briquette: ore in a weight ratio of 10: 1-5: 1-5: 3-10: 1-5 (2) 5 to 20 parts by weight of waste vinyl powder, (3) 5 to 15 parts by weight of styrene-butadiene rubber, (4) 1 to 10 parts by weight of amorphous non-quartz silica, And (5) 1 to 10 parts by weight of carboximide.

The composition for repair and reinforcement of the present invention is excellent in strength and durability such as compressive strength, bending strength and bond strength, and can be used for various kinds of civil engineering such as roads, bridges, bridge structures, sewer pipes, It can be used for the deterioration of reinforced concrete structure for construction, surface repair by reinforcing steel corrosion and filling. Also, it is applicable to exponential structures such as roof slab waterproofing, swimming pool, water purification plant, etc. because of less shrinkage and excellent water tightness.

In addition, the repair and reinforcement composition of the present invention is excellent in adhesion to a conventional concrete structure (matrix), and is not easily separated or dropped off due to strong external pressure or impact.

1 is a schematic view showing a pre-wetting type injection device.
2 is a perspective view schematically showing a mixer shaft.
3 is a view in which a mixer shaft is installed in a pre-wetting jetting apparatus.
Figure 4 is a perspective view schematically illustrating another mixer shaft.

The present invention relates to a composition including a recycled material which is excellent in strength and durability and which can be effectively used on a road where a lot of cement corrosion and erosion occurs, and a method of reinforcing and reinforcing a section using a double mixer shaft.

Hereinafter, the present invention will be described in detail.

(1) a main part including Portland cement, a vinyl acetate emulsion copolymer resin, a styrene butadiene emulsion copolymer resin, a briquette material and an ore, (2) a waste plastic powder, (3) a recycled material, ) Styrene-butadiene rubber, (4) amorphous non-quartz silica and (5) carboximide, and the waste vinyl powder may be treated with an enzyme.

The subject part includes Portland cement: vinyl acetate emulsion copolymer resin: styrene butadiene emulsion copolymer resin: briquettes: ore in a weight ratio of 10: 1-5: 1-5: 3-10: 1-5; Preferably 10: 2-4: 2-4: 5-8: 1-3. When the topical part is mixed in the above weight ratio range, the strength and durability of the composition are lowered, shrinkage occurs more easily, and pores are formed, so that the composition can not be used as a composition for repair and reinforcement.

The vinyl acetate emulsion copolymer resin and the styrene butadiene emulsion copolymer resin are resins containing a crosslinking component in which the crosslinking component of the copolymer resin is crosslinked as a whole by crosslinking a briquetting material, an ore, a waste vinyl powder and amorphous non-quartz silica, Dimensional structure, which improves the strength and improves adhesion to existing concrete structures without cracking even when used for a long time. When only one of the vinyl acetate emulsion copolymer resin and the styrene butadiene emulsion copolymer resin is used, the effects such as strength and adhesiveness are lowered to 1/3 compared with the case of using both of the vinyl acetate emulsion copolymer resin and the styrene butadiene emulsion copolymer resin, .

  The briquettes are easily mixed with the copolymer resins to improve the strength of the composition and impart elasticity to the concrete.

The ore is at least one selected from the group consisting of quartz, senidine, quartz and albite, and when it is mixed with the copolymer resins, a dense skeleton structure is formed to further enhance the strength of the composition and prevent cracking.

The above-mentioned perovinyl powder is a powder obtained by pulverizing waste vinyl with an average particle diameter of 0.05 to 0.5 mm. The powder is bonded to the copolymer resins and shrinks well, resulting in a lower occurrence rate of cracks. When the average particle diameter of the waste vinyl powder is less than the lower limit value, shrinkage may not occur. If the average particle diameter of the waste vinyl powder exceeds the upper limit value, the strength may be lowered so that even a weak impact may be dropped. The petiole powder may be treated with at least one enzyme selected from the group consisting of papain, bromelain, picin, and trypsin. When the enzyme is treated with the enzyme, the viscoelastic behavior is reduced compared with the case where the enzyme is not treated, Or by increasing the stiffness of the concrete to reduce the permanent deformation.

The content of the pervinyl powder is 5 to 20 parts by weight, preferably 5 to 10 parts by weight based on 100 parts by weight of the resin. When the content is less than the lower limit, the incidence of cracks may increase. The durability of the concrete may deteriorate.

The styrene-butadiene rubber imparts elasticity to the concrete and improves the strength of the adhesive. The content of the styrene-butadiene rubber is 5 to 15 parts by weight, preferably 8 to 13 parts by weight, based on 100 parts by weight of the resin. When the content is less than the lower limit, the elasticity is not improved, If it exceeds the upper limit value, the durability is lowered and the adhesive strength is rather lowered, so that the construction may be difficult.

The amorphous non-quartz silica improves abrasion resistance and durability after repair. The content of the amorphous non-quartz silica is 1 to 10 parts by weight, preferably 2 to 8 parts by weight, based on 100 parts by weight of the resin. When the content is less than the lower limit, abrasion resistance and durability may be deteriorated. The strength may be lowered.

The carboximide improves the viscosity and cohesive action of the composition. When carboximide is not used, carboxyimide is used to improve the cohesion of the materials because the ores and other materials tend to separate even when free-jet injectors are used. The content of carboximide is 1 to 10 parts by weight, preferably 3 to 6 parts by weight, based on 100 parts by weight of the subject. When the content is less than the lower limit, the ores and other materials may be separated to deteriorate strength and durability If it exceeds the upper limit value, the viscosity may become too high and it may be difficult to pour.

 Such a repair and reinforcement composition can be applied to a reinforced concrete structure using a pre-wetting injection device equipped with a mixer shaft for mixing and transporting the composition.

1 is a schematic view showing a pre-wetting type injection device. The pre-wetting injection device is a device that pre-wets with a small amount (several%) of water injected from the water tank 51 when the repair and reinforcement composition of the present invention is supplied to the high- The point is characterized. The small amount of water supplied at this time prevents the layer separation phenomenon due to the difference in weight between the mixtures constituting the repairing and reinforcing composition and improves the reactivity to facilitate smooth flow of the composition for maintenance and reinforcement. In this way, primarily the composition for maintenance and reinforcement mixed with water is delivered to the spray nozzle 11 in the state of spray mixed with the compressed air in the high pressure transfer hose through the spray nozzle 11.

Since the pre-wetting injection device as described above has a sufficiently long travel distance to the injection nozzle 11, it is easy to access the work even when repairing a concrete structure that is difficult for a device or a vehicle to approach. In addition, because the water is mixed with water in the repair and reinforcement composition and flows in the state of a river, the flow smoothly and the attraction force against the construction surface after discharging is high.

Such a pre-wetting jetting apparatus requires a mixer shaft that can mix and deliver the supplied repair and reinforcement composition more effectively.

Fig. 2 is a perspective view schematically showing a mixer shaft, and Fig. 3 is a view in which a mixer shaft is installed in a pre-wetting jetting apparatus.

2 and 3, the mixer shaft includes first and second shaft portions 100A and 100B and blades 200A and 200B, and is used for maintenance or reinforcement of concrete structures, For example, the repair and reinforcement composition is mixed with a small amount of water and is transported to a high-pressure feed pump (not shown).

The first and second shaft portions 100A and 100B are rotatably installed in a stirring pipe 80 provided at a discharge side of a silo 70 of the apparatus. The first and second shaft portions 100A and 100B are installed at the lower portion of the silo 70 and are coupled to the transfer shaft 74 rotated by the drive portion 72 and are rotated in the interlocked state, Rotate. The first and second shaft portions 100A and 100B are preferably provided in a lateral direction (FIG. 2) or a longitudinal direction (upward and downward) so that the shaft portions of the first and second shaft portions 100A and 100B are parallel to each other, , And 100B are circular or polygonal rods, and preferably have a circular cross section.

The blades 200A and 200B are hollow type auger blades, and holes are formed in the axial direction of the shaft portions 100A and 100B. The hollow type auger type blades 200A and 200B are formed in a spiral shape on the outer periphery of each of the shaft portions 100A and 100B and the outer diameters of the blades 200A and 200B along the axial direction of the shaft portions 100A and 100B And the blades 200A and 200B preferably have a large outer diameter of the blades 200A and 200B at the front end portions of the shaft portions 100A and 100B.

The mixer shaft constructed as described above is rotatably installed in a stirring pipe (80) provided on a discharge side of a silo (70) of a pre-wetting spray device. The repair and reinforcement composition supplied to the apparatus for repairing or reinforcing the concrete structure is mixed with a small amount of water and primary squeeze mixed with a mixer shaft and is transferred to a high pressure transfer pump (not shown). At this time, since the mixer shaft for the injection device has the spiral blade at the outer periphery of the rotating shaft portion, the maintenance and repair composition can be more effectively transferred to the high pressure feed pump. Further, the outer diameters of the blades are formed to be different from each other along the axial direction of the shaft portions 100A and 100B. By forming the blades in a hollow form, sufficient interior space is formed so that the repair and reinforcing composition can be mixed and smoothly transported. Although not shown in the figure, the composition for maintenance and reinforcement mixed with a small amount of water and primary syrup mixed by a mixer shaft and conveyed to a high pressure feed pump is supplied to a high pressure feed hose by a high pressure feed pump, And is conveyed toward the injection nozzle in a spraying mixed state by the compressed air in the transfer hose. The reaction takes place and is sprayed on the repair surface of the concrete structure through the spray nozzle. According to the prewetting method, the repair and reinforcement composition supplied to the apparatus for repairing or reinforcing concrete structures is mixed more effectively by the mixer shaft in the state where the primary mixes are mixed, and is further transported to the high-pressure conveying pump, The rebound amount and the dust amount (scattered dust amount) can be reduced when repairing or reinforcing the concrete structure. The amount of rebound means the amount falling on the floor without being adsorbed when the composition is sprayed onto the surface to be applied.

Figure 4 is a perspective view schematically illustrating another mixer shaft.

4, the mixer shaft for another pre-wetting jetting apparatus includes first and second shaft portions 100A and 100B, first and second blades 200A and 200B, and first and second auxiliary shafts 300A, and 300B. Here, the shaft portions 100A and 100B and the blades 200A and 200B are the same as those of the mixer shaft described above, and therefore, description thereof is omitted.

The auxiliary shafts 300A and 300B are rotatably installed on the shaft portions 100A and 100B at predetermined intervals in parallel with the shaft portions 100A and 100B, preferably at intervals of the height of the support portions 320A and 320B And has helical blades 310A and 310B. It is preferable that the auxiliary shafts 300A and 300B are provided on both sides of the shaft portions 100A and 100B at the rear end portions of the shaft portions 100A and 100B. Both ends of the auxiliary shafts 300A and 300B are rotatably coupled to supporters 320A and 320B fixed to the shafts 100A and 100B and are not driven by a separate power source (not shown) It is adopted as an auxiliary device so that the repair and reinforcement composition can be mixed more smoothly.

In Fig. 4, unillustrated reference numerals 210A and 210B are auger type blades in which no holes are formed unlike the hollow type auger type blades 200A and 200B.

The operation of the mixer shaft of FIG. 4 is the same as that of the mixer shaft of FIG. 2, so that description thereof is omitted. However, since the auxiliary shafts 300A and 300B having the helical blades 10A and 310B are rotatably installed on the shaft portions 100A and 100B at predetermined intervals in parallel to the shaft portions 100A and 100B, It is possible to more effectively mix and deliver the repair and reinforcement composition supplied to the pre-wetting injection device for reinforcement.

In addition, the present invention provides a method of repairing or reinforcing a section of a reinforced concrete structure using a repair and reinforcement composition.

The method for repairing or reinforcing a section of a concrete structure comprises the steps of: (a1) pre-treating a section of the concrete; (a2) drilling a reinforcement anchor; (a3) installing a fixture; (a4) providing a high tenacity glass fiber reinforcement or high tenacity carbon stiffener; (a5) removing the reinforcing steel rust; (a6) reinforcing the reinforcing bars; (a7) performing a high pressure water wash; And

(b1) a pre-wetting spraying device equipped with a mixer shaft for mixing and conveying the composition at the same time as the pre-wetting spraying device, Applying a repair and reinforcement composition comprising amorphous non-quartz silica and carboximide to a concrete section; (b2) spraying the finish material; (b3) curing step; (b4) applying a primer; (b5) applying a finish coating material.

The finishing material comprises 10-25 parts by weight of an organosilane, 5-8 parts by weight of a borate compound, 1-5 parts by weight of a polyphosphate, 1-5 parts by weight of phosphoric acid, 1-5 parts by weight of a phenol resin 1-5 And 1-3 parts by weight of the metal powder.

Also, the primer may be composed of 20-30 parts by weight of methacrylate or acrylate, a group of silica, alumina, zirconia, titanium oxide, zinc oxide, germanium oxide, indium oxide and tin oxide, based on 100 parts by weight of the terminal reactive polysiloxane compound And 5-10 parts by weight of hardness-enhancing particles comprising at least one particle selected from the group consisting of:

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

Example  One.

Portland cement: vinyl acetate emulsion copolymer resin: styrene-butadiene emulsion: briquettes: 100 parts by weight of a subject part in a weight ratio of 10: 3: 2: 5: 2, 7 parts by weight of waste vinyl powder, 10 parts by weight of styrene-butadiene rubber , 5 parts by weight of amorphous non-quartz silica and 4 parts by weight of carboximide were mixed to prepare a composition for repair and reinforcement.

Example  2.

The same procedure as in Example 1 was conducted except that the waste vinyl powder was treated with papain enzyme to prepare a composition for repair and reinforcement.

Comparative Example  One.

The same procedure as in Example 1 was carried out except that the composition for repair and reinforcement was prepared without using the vinyl acetate emulsion copolymer resin.

Comparative Example  2.

The same procedure as in Example 1 was carried out except that the composition for repair and reinforcement was prepared without using the briquettes.

Comparative Example  3.

The same procedure as in Example 1 was carried out except that the composition for repair and reinforcement was prepared without using the waste vinyl powder.

Comparative Example  4.

The procedure of Example 1 was repeated except that the styrene-butadiene rubber was not used.

Comparative Example  5.

The same procedure as in Example 1 was conducted except that the amorphous non-quartz silica was not used and the composition for repair and reinforcement was prepared.

Comparative Example  6.

The same procedure as in Example 1 was carried out, except that the carboximide was not used to prepare a composition for maintenance and reinforcement.

Test Example  One.

1-1. Compressive strength (kgf / ㎠): tested in accordance with KS L 5105.

1-2. Flexural strength (kgf / ㎠): tested in accordance with KS F 2477.

1-3. Bond strength (kgf / cm 2): tested in accordance with KS F 4715.

1-4. Change in length (%): tested according to KS F 2424.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Compressive strength 3 days 360 365 120 160 158 165 133 130 7 days 530 550 280 310 315 329 291 284 28th 660 680 370 405 399 416 377 368 Flexural strength 3 days 85 86 41 48 45 41 42 40 7 days 109 116 63 80 67 58 65 63 28th 174 189 110 126 118 104 112 107 Bond strength 7 days 30 36 15 19 17 14 17 13 28th 49 57 24 35 32 22 33 25 Length change rate +0.010 0.008 0.061 0.031 0.096 0.084 0.030 0.029

As shown in Table 1, it was confirmed that the repair and reinforcement compositions prepared according to Examples 1 and 2 of the present invention were superior in compressive strength, bending strength, bond strength and length change ratio to the repair and reinforcement composition prepared in Comparative Example .

Test Example  2.

The pre-wetting injection device equipped with the mixer shaft for mixing and transporting the repair and reinforcement composition prepared in the examples and the comparative examples was used to test the thickness that can be repaired once.

○: One-time maintenance is possible.

×: Repair and reinforcement is not possible only once

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 50 mm ○ ○ ○ ○ ○ ○ ○ ○ 80 mm ○ ○ × ○ ○ × × × 100 mm ○ ○ × × × × × × 120 mm ○ ○ × × × × × × 150 mm ○ ○ × × × × × × 180 mm × × × × × × × ×

As shown in Table 2 above, the repair and reinforcement compositions prepared according to Examples 1 and 2 of the present invention had a construction of 100 mm or more in comparison with the repair and reinforcement composition prepared in Comparative Example 1, It is possible to solve the instability factor with the interface due to the division by car.

In the case of supplying the repair and reinforcement compositions of Examples 1 and 2 to other conventional spraying apparatuses other than the pre-wetting spraying apparatus, it is possible to obtain a repairable thickness of about 85 mm at one time, When the composition was supplied and used, it was confirmed that the thickness that can be repaired at once was about 40 mm. Therefore, when the repair and reinforcement composition prepared in the embodiment of the present invention is used together with the pre-wetting spraying device, it is poured by about 65 mm thick compared with the case of using the conventional spraying device, And the pre-wetting jetting device are used together, they are poured thicker, similar to the case of using the conventional jetting device, or at 40 mm or less. Therefore, when the repair and reinforcement composition prepared in the embodiment of the present invention is used together with the pre-wetting injection device, it is possible to install the repair and reinforcement composition thicker than when the repair and reinforcement composition of the comparative example and the pre- Therefore, it is preferable to use the repair and reinforcement composition of the present invention for the pre-wetting spraying apparatus.

70: silo 72:
74: shaft 76:
80: stirring pipe 100A: first shaft portion
100B: second shaft portion 200A: first blade
200B: second blade 210A: first blade
210B: second blade 300A: first auxiliary shaft
300B: second auxiliary shaft 310A: first helical blade
310B: second spiral blade 320A: first support portion
320B: second support portion

Claims (11)

(1) Portland cement: vinyl acetate emulsion copolymer resin: styrene-butadiene emulsion copolymer resin: briquette: ores in a weight ratio of 10: 1-5: 1-5: 3-10: 1-5, (2) 5 to 20 parts by weight of waste vinyl powder, (3) 5 to 15 parts by weight of styrene-butadiene rubber, (4) 1 to 10 parts by weight of amorphous non-quartz silica, and (5) And 1 to 10 parts by weight of a styrene-butadiene copolymer. The composition of claim 1, wherein the waste vinyl powder is treated with an enzyme. [3] The composition according to claim 2, wherein the enzyme is at least one selected from the group consisting of papain, bromelain, picisin, and trypsin. (a1) pre-treating a section of concrete; (a2) drilling a reinforcement anchor; (a3) installing a fixture; (a4) providing a high tenacity glass fiber reinforcement or high tenacity carbon stiffener; (a5) removing the reinforcing steel rust; (a6) reinforcing the reinforcing bars; (a7) performing a high pressure water wash; And
(b1) a pre-wetting spraying device equipped with a mixer shaft for mixing and conveying the composition at the same time as the pre-wetting spraying device, Applying a repair and reinforcement composition comprising amorphous non-quartz silica and carboximide to a concrete section; (b2) spraying the finish material; (b3) curing step; (b4) applying a primer; (b5) applying a finish coating material. The composition for repair and strengthening according to claim 4, wherein the repair and reinforcement composition comprises (1) Portland cement: vinyl acetate emulsion copolymer resin: styrene butadiene emulsion copolymer resin: briquettes: ore in a weight ratio of 10: 1-5: 1-5: 3-10: 1 (2) 5 to 20 parts by weight of waste vinyl powder, (3) 5 to 15 parts by weight of styrene-butadiene rubber, (4) amorphous non-quartz 1 to 10 parts by weight of silica, and (5) 1 to 10 parts by weight of carboximide. The method of claim 4 or 5, wherein the waste plastic powder is treated with at least one enzyme selected from the group consisting of papain, bromelain, picisin, and trypsin. delete delete delete delete delete

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