KR102341746B1 - The pneumatic method of chalammation minimizes vibration and damage to the structure matrix, and a repair method that can secure quality by using a premix-type emergency repair agent containing an appropriate amount of excellent concrete admixture - Google Patents

Abstract

The present invention relates to a repair method for minimizing vibration and damage of a structure matrix with a pneumatic rock drill, and ensuring the quality using a premix type emergency repair agent mixed with an excellent concrete admixture in a proper amount. The repair method of the present invention comprises: a preparation step (S10); a construction surface treatment step (S20); a reinforcing bar corrosion removal and anti-corrosion treatment step (S30); a corrosion suppression and anti-corrosion treatment step (S40); an alkali recovery anti-corrosion treatment step (S50); an adhesion enhancement treatment step (S60); and a pouring and finishing step (S70).

Description

A repair method that minimizes vibration and damage to the structure’s matrix with a pneumatic chamrock machine and enables quality assurance by using a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture. , and a repair method that can secure quality by using a premix-type emergency repair agent containing an appropriate amount of excellent concrete admixture}

The present invention relates to a construction method for repairing concrete or the structure itself, which is poured during the installation of a structure. More specifically, the concrete of the damaged structure is chipped using a pneumatic rock drilling machine, but chipping at least twice In order to prevent damage to the structure by ensuring that only the damaged concrete is accurately removed while minimizing the impact of the concrete matrix, that is, the slab, the construction surface treatment step is carried out, After that, rust removal and coating-type rust preventive agent are applied to remove rust as well as inhibit rust, apply an adhesive composition, and pour a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture, i.e., a concrete composition, to prevent damage to concrete structures It can be repaired quickly, and it can increase strength, enhance penetration, attach microcracks and even form a waterproof layer, as well as increase the surface strength of concrete and reduce abrasion. This is a technical field related to a repair method that minimizes the amount of concrete and can secure quality by using a premix type emergency repair agent that is mixed with an appropriate amount of an excellent concrete admixture.

In general, a bridge consists of an upper structure and a lower structure. The upper plate of the bridge usually has a girder placed on the lower pier, a concrete slab is placed on the girder, and a waterproofing layer is laid on the poured concrete slab, It is installed by constructing a concrete pavement layer that becomes the road surface on it, or by constructing an asphalt pavement layer.

The top plate of such a bridge corresponds to a location that receives a load directly due to the role of the vehicle's driving path, and is exposed to natural environments such as rainwater and sunlight. Cracks may occur under the load.

Therefore, in order to cope with the expansion and contraction of the bridge according to the temperature change, the upper plate (slab) included in the upper structure of the bridge is divided into several parts in the longitudinal direction of the bridge, and an expansion joint connecting these upper plates between the divided upper plates It is constructed with a device and constructed to work against the contraction and expansion of the top plate according to the seasonal change.

These expansion joints are constructed by pouring concrete on the slab steps of the bridges adjacent to the expansion joints for replacement or repair. Such concrete has a tensile force greater than the allowable load or cracks due to impact, etc. Since it cannot resist, the resistance of the material is rapidly reduced and brittleness can occur, which is suddenly destroyed. There is a problem.

Accordingly, the concrete poured into the expansion joint or the concrete layer around the lower part that fixes the bridge support is installed using high-strength and low-deformation concrete. Concrete is poured without reinforcement (reinforcement).

However, for example, in the case of the rear part of the expansion joint, if this is repaired using non-reinforced (non-reinforced) concrete, large shrinkage occurs as the non-reinforced concrete layer hardens and dries, and as the vehicle passes, the rear part of the Concrete is easily broken and cracked, and if this phenomenon worsens, the concrete layer is damaged and the broken concrete fragments travel on the road. There is a problem in that the maintenance cost is excessive because it is frequently repaired when necessary.

Republic of Korea Patent Registration No. 10-1938625 (2019.01.09.)

The present invention is a technology devised to solve the problems according to the prior art, and the conventional concrete layer repair method of the expansion joint device has low adhesion strength with the base concrete layer, so it is easily damaged and cracked after repair or frequent maintenance is required. There is a problem of excessive maintenance and management costs;

As a solution to this, it is more precise and accurate by chipping the concrete of the structure that requires repair and reinforcement multiple times, and minimizes damage to the exposed rebar, while high-strength compression with the concrete matrix by the adhesive composition and the concrete composition It is provided through a repair method that minimizes vibration and damage to the structure's main body and uses a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture to ensure quality with a pneumatic chamrock machine that can satisfy strength and adhesion strength. that is the main purpose.

In order to realize the desired purpose as described above, the present invention cuts between the concrete 10 and the asphalt 20 of the structure using a cutting machine 30, but a preparation step of cutting as much as the thickness of the concrete 10 (S10) ); and the pneumatic rock drilling machine 100 to chip the concrete 10 at least twice and then remove it to form a concrete pouring surface, and to remove the dust from the concrete pouring surface using a high-pressure washer Construction surface treatment step (S20); and rebar rust removal rust prevention treatment step (S30) of removing rust of rebar exposed to the outside of the concrete pouring surface and applying a rust-removing rust preventive agent; and the exposed outside of the concrete pouring surface A rust prevention treatment step (S40) of mixing and applying a coating-type rust preventive agent to the reinforcing bar with cement powder; and an alkali recovery rust prevention treatment step (S50) of applying a penetration-type rust preventive agent to the concrete pouring surface to restore it to alkalinity (S50); and the above Adhesive reinforcement treatment step of applying an adhesive composition to the concrete pouring surface (S60); and a pouring and finishing step (S70) of pouring and curing the concrete composition on the concrete pouring surface;

The concrete composition comprises 20 to 30% by weight of alumina cement, 2 to 4% by weight of sodium carbonate, 3 to 5% by weight of alum, 1 to 3% by weight of a water reducing agent, 4 to 6% by weight of a silicic acid-based compound, 19 to 29% by weight of Portland cement. 35.9 to 41.9% by weight of silica sand, 0.05 to 0.15% by weight of polyvinyl alcohol, 1.3 to 2% by weight of silica fume, and 0.75 to 1% by weight of rice hull silica Vibration and We propose a repair method that minimizes damage and uses a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture to ensure quality.

In addition, the rock drill 100 of the present invention includes a housing 110; and a control unit installed inside the housing 110; A handle portion 120 provided with a switch; and a connection support rod 130 coupled to a lower portion of the housing 110; and a chipping cylinder 140 coupled to a lower portion of the connection support rod 130; and for the chipping a power transmission pipe 150 coupled to the lower portion of the cylinder 140 and operated by the chipping cylinder 140; and a chipping head 160 coupled to a lower portion of the power transmission pipe 150 .

In addition, the chipping cylinder 140 of the present invention is installed therein to measure the pressure generated by the operation of the power transmission pipe 150, and a pressure measuring sensor that transmits the measured pressure information to the control unit; including and a manual pressure control switch 112 provided on the upper surface of the housing 110 to enable an operator to manually adjust the operating pressure of the chipping cylinder 140 to set it; and is provided on the upper surface, It is characterized in that it is configured to include; a pneumatic display unit 114 connected to the control unit to receive and display the pressure information.

In addition, when the power transmission pipe 150 is operated by the chipping cylinder 140, the control unit of the present invention is a pressure drop information in which the operating pressure is normally reduced based on the operating pressure set in the manual pressure control switch 112. is set, and if the pressure information transmitted from the pressure measuring sensor is not lower than the preset pressure drop information, the operating pressure is automatically increased.

In addition, the housing 110 of the present invention is installed inside the position measurement sensor to measure the vertical position and transmit the measured position information to the control unit; and is provided on the upper surface, and is connected to the control unit to transmit the position information It is characterized in that it comprises a; position display unit 116 for receiving and displaying.

In addition, the position display unit 116 of the present invention is characterized in that it displays the position of the housing 110 through the length of the bar graph by the position information.

In addition, the housing 110 of the present invention is provided on the upper surface, the operator manually sets the reference position, and a reference position setting switch 118 for transmitting the set reference position to the control unit; is configured to include, the position The display unit 116 receives the reference position from the control unit and displays the color of the histogram differently when the length of the histogram is formed to be greater than or less than the length corresponding to the reference position.

In addition, the adhesive composition of the present invention contains 5 to 30% by weight of finely divided silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of a color pigment, 1 to 30% by weight of an extender pigment, 0.1 to 2% by weight of a blocking agent, and a polymerization accelerator 0.1 to 3% by weight, 0.1 to 2% by weight of an anti-settling agent, 0.1 to 0.5% by weight of a dispersant, and 20 to 45% by weight of an adhesion promoter.

In addition, the adhesive composition of the present invention is characterized in that it is made by further mixing 5 to 15% by weight of polyethylene terephthalate.

In addition, the concrete composition of the present invention is characterized in that 5 to 10 parts by weight of polyhydroxy aminoether is further mixed with respect to 100 parts by weight of the concrete composition.

The repair method that minimizes vibration and damage to the structure’s matrix with the pneumatic chamrock machine according to the present invention presented as described above and can secure quality by using a premix type emergency repair agent containing an appropriate amount of excellent concrete admixture requires repair and reinforcement. When chipping the concrete of the structure to be constructed as a concrete structure, the pneumatic rock drilling machine is used to chip multiple times, so it minimizes the impact of the concrete matrix and reduces fatigue, thereby preventing cracks and unnecessary chipping, and at the same time accurately and accurately chipping. possible effects can be obtained.

In addition, the present invention enables the control of the rock drilling machine so that only the desired thickness can be precisely chipped during n times of chipping among the plurality of times, so that only the damaged concrete can be removed more precisely and accurately.

In addition, the present invention improves adhesion and maintains high strength, and at the same time, has excellent flexural strength and durability, and can be quickly constructed by constructing an adhesive composition and a concrete composition on the concrete of a structure that requires repair and reinforcement, An effect excellent in workability can be obtained.

1 is a schematic diagram showing a preparation step of a structure repair method according to a preferred embodiment of the present invention.
Figure 2 is a side view schematically showing the construction surface treatment step of the structure repair method according to a preferred embodiment of the present invention.
Figure 3 is a side view schematically showing the rust removal and rust prevention treatment step and the rust prevention treatment step of the reinforcing bar of the structure repair method according to a preferred embodiment of the present invention.
Figure 4 is a side view schematically showing the adhesion reinforcement processing step and the pouring and finishing steps of the structure repair method according to a preferred embodiment of the present invention.
Figure 5 is a plan view schematically showing the upper surface of the housing of the rock drill of the rock drill according to the preferred embodiment of the present invention.
6 is a flowchart showing a structure repair method according to a preferred embodiment of the present invention.

The present invention is to repair the concrete 10 or later material (hereinafter, collectively referred to as 'concrete 10') that is poured when the structure (eg, concrete road pavement, expansion joint device, concrete structure) is installed. As to the construction method for The construction surface treatment step (S20) is performed to prevent damage to the structure by accurately removing only the damaged concrete 10, and rust removal and coating after removing the rust of the reinforcing bars exposed to the outside of the chipped and removed concrete pouring surface By applying an anti-rust agent to remove rust as well as inhibit rust, by applying an adhesive composition and pouring a concrete composition, it is possible to quickly repair the damage of a concrete structure, to improve strength, to strengthen penetrability, and to attach microcracks and waterproof layers. It is a pneumatic chamfer that not only can form, but also increases the surface strength of concrete and reduces abrasion. It minimizes vibration and damage to the structure body and uses a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture. It is a technical field related to a repair method that can be secured.

The configuration for achieving the present invention as described above includes cutting between the concrete 10 and the asphalt 20 of the structure using a cutting machine 30, a preparation step of cutting as much as the thickness of the concrete 10 (S10); and a pneumatic rock drilling machine 100 to form a concrete pouring surface by chipping and removing the concrete 10 at least twice, and a high-pressure washing machine to remove dust from the concrete pouring surface. The treatment step (S20); and the rust removal treatment step (S30) of removing the rust of the reinforcing bar exposed to the outside of the concrete pouring surface and applying a rust-removing type rust preventive agent (S30); A rust-inhibiting rust prevention treatment step (S40) of mixing and applying a coating-type rust preventive agent with cement powder; and an alkali recovery rust prevention treatment step (S50) of applying a penetration-type rust preventive agent to the concrete pouring surface to restore alkalinity (S50); and pouring the concrete Adhesion reinforcement processing step of applying an adhesive composition to the surface (S60); and a pouring and finishing step (S70) of pouring and curing the concrete composition on the concrete pouring surface;

The concrete composition comprises 20 to 30% by weight of alumina cement, 2 to 4% by weight of sodium carbonate, 3 to 5% by weight of alum, 1 to 3% by weight of a water reducing agent, 4 to 6% by weight of a silicic acid-based compound, 19 to 29% by weight of Portland cement. 35.9 to 41.9% by weight of silica sand, 0.05 to 0.15% by weight of polyvinyl alcohol, 1.3 to 2% by weight of silica fume, and 0.75 to 1% by weight of rice hull silica.

In addition, the rock drill 100 of the present invention includes a housing 110; and a control unit installed inside the housing 110; A handle portion 120 provided with a switch; and a connection support rod 130 coupled to a lower portion of the housing 110; and a chipping cylinder 140 coupled to a lower portion of the connection support rod 130; and for the chipping a power transmission pipe 150 coupled to the lower portion of the cylinder 140 and operated by the chipping cylinder 140; and a chipping head 160 coupled to a lower portion of the power transmission pipe 150 .

In addition, the chipping cylinder 140 of the present invention is installed therein to measure the pressure generated by the operation of the power transmission pipe 150, and a pressure measuring sensor that transmits the measured pressure information to the control unit; including and a manual pressure control switch 112 provided on the upper surface of the housing 110 to enable an operator to manually adjust the operating pressure of the chipping cylinder 140 to set it; and is provided on the upper surface, It is characterized in that it is configured to include; a pneumatic display unit 114 connected to the control unit to receive and display the pressure information.

In addition, when the power transmission pipe 150 is operated by the chipping cylinder 140, the control unit of the present invention is a pressure drop information in which the operating pressure is normally reduced based on the operating pressure set in the manual pressure control switch 112. is set, and if the pressure information transmitted from the pressure measuring sensor is not lower than the preset pressure drop information, the operating pressure is automatically increased.

In addition, the housing 110 of the present invention is installed inside the position measurement sensor to measure the vertical position and transmit the measured position information to the control unit; and is provided on the upper surface, and is connected to the control unit to transmit the position information It is characterized in that it comprises a; position display unit 116 for receiving and displaying.

In addition, the position display unit 116 of the present invention is characterized in that it displays the position of the housing 110 through the length of the bar graph by the position information.

In addition, the housing 110 of the present invention is provided on the upper surface, the operator manually sets the reference position, and a reference position setting switch 118 for transmitting the set reference position to the control unit; is configured to include, the position The display unit 116 receives the reference position from the control unit and displays the color of the histogram differently when the length of the histogram is formed to be greater than or less than the length corresponding to the reference position.

In addition, the adhesive composition of the present invention contains 5 to 30% by weight of finely divided silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of a color pigment, 1 to 30% by weight of an extender pigment, 0.1 to 2% by weight of a blocking agent, and a polymerization accelerator 0.1 to 3% by weight, 0.1 to 2% by weight of an anti-settling agent, 0.1 to 0.5% by weight of a dispersant, and 20 to 45% by weight of an adhesion promoter.

In addition, the adhesive composition of the present invention is characterized in that it is made by further mixing 5 to 15% by weight of polyethylene terephthalate.

In addition, the concrete composition of the present invention is characterized in that 5 to 10 parts by weight of polyhydroxy aminoether is further mixed with respect to 100 parts by weight of the concrete composition.

Hereinafter, a repair method that minimizes vibration and damage to the structure's main body with a pneumatic chamrock machine according to the present invention and can secure quality by using a premix type emergency repair agent containing an appropriate amount of excellent concrete admixture (hereinafter, 'structure repair method') ) will be described in detail in the order of construction.

The preparation step (S10), which is a major component for achieving the present invention, is

The structure (not shown, for example, it may be a road pavement made of concrete or an expansion joint device or a structure made of concrete). The area between the concrete 10 (hereinafter referred to as 'concrete 10') and the adjacent asphalt 20 is cut using the cutting machine 30, but cut by the thickness of the concrete 10, which will be described later. The concrete 10 and the asphalt 20 are partitioned so that damage to the asphalt 20 does not occur when the concrete is chipped using the rock drill 100 in the construction surface treatment step S20 to be performed.

The construction surface processing step (S20), which is a major component for achieving the present invention, is

Using the pneumatic rock drill 100, the concrete 10 after the preparation step (S10) is chipped at least twice and removed to form a concrete pouring surface (not shown), and using a high-pressure washer As to remove the dust on the concrete pouring surface, by chipping at least twice to a thickness smaller than the chipped thickness using the rock drill 100 according to the thickness to be chipped, the concrete structure, that is, the fatigue of the concrete matrix to minimize cracks in the concrete matrix and chipping of unnecessary parts.

Accordingly, in the construction surface treatment step (S20) of the present invention, by chipping the concrete 10 at least twice, the effect of accurately removing only the damaged portion of the concrete 10, that is, up to the slab upper part of the bridge, is realized. do it

In addition, as described above, the rock drilling machine 100 used in the construction surface treatment step (S20) of the present invention is to chip the concrete 10 at least twice, that is, n times so that only the damaged part can be accurately removed. It is characterized in that the concrete 10 to be chipped can be chipped to the correct thickness every time.

Specifically, the rock drill 100 includes a housing 110, a control unit (not shown) installed inside the housing 110, and installed on the outside of the housing 110, so that an operator can grip it, and , a handle portion 120 provided with an operation switch (not shown), a connection support rod 130 coupled to a lower portion of the housing 110 , and a chipping cylinder 140 coupled to a lower portion of the connection support rod 130 ). And, a power transmission pipe 150 coupled to the lower portion of the chipping cylinder 140 and operated by the chipping cylinder 140 and a chipping head 160 coupled to the lower portion of the power transmission pipe 150 ) is comprised of

That is, in the rock drill 100, when the operator grips the handle portion 120 installed in the housing 110 and operates the pneumatically operated chipping cylinder 140 using an operation switch, the power transmission pipe 150 is operated. The pneumatic pressure is transmitted to the chipping head 160 through which the concrete 10 is chipped. At this time, although the tip of the chipping head 160 is shown to be curved in the drawing, it will be apparent that it may be an extension generally used for chipping.

In addition, in order to chip the concrete 10 to an accurate thickness, the chipping cylinder 140 is installed therein to measure the pressure, that is, the pneumatic pressure generated by the operation of the power transmission pipe 150, and the measured pressure information is configured to include a pressure measuring sensor for transmitting It is configured to include a manual pressure control switch (112).

That is, by adjusting the operating pressure of the chipping cylinder 140 using the manual pressure control switch 112, the operator can obtain the effect of controlling the thickness of the concrete 10 being chipped compared to the prior art.

In addition, the housing 110 is provided on the upper surface and is connected to the control unit and includes a pneumatic display unit 114 for receiving and displaying pressure information. Not only can it be checked whether the operating pressure of the chipping cylinder 140 adjusted by the switch 112 operates normally, but also when the user supports the rock drill 100, that is, when chipping is made in a state where pressure is applied to the bottom, It is possible to confirm that chipping is performed smoothly by confirming that the operating pressure of the chipping cylinder 140 is normally reduced due to the normal chipping.

In addition, when an operator inputs an operating pressure through the manual pressure control switch 112, the chipping cylinder 140 generates pneumatic pressure according to the operating pressure, thereby pressing the power transmission pipe 150 downward. , the pneumatic pressure is transmitted to the chipping head 160 and the concrete 10 is chipped. When supporting, the chipping head 160 and the power transmission pipe 150 are moved downward to reduce the pneumatic, that is, the operating pressure, or abnormally, that is, the concrete 10 by the chipping head 160 ) is not chipping, when the operator is stably supporting the housing 110, the chipping head 160 and the power transmission pipe 150 do not move downward, so that the pneumatic pressure, that is, the operating pressure, is the operator's support pressure. and increases, and the operator can easily check whether chipping is smoothly accomplished by checking the increase or decrease of the pneumatic pressure, that is, the operating pressure through the pneumatic display unit 114 , so that the operation can be performed efficiently.

At this time, when the power transmission pipe 150 is operated by the chipping cylinder 140 , the control unit normally reduces the operating pressure based on the operating pressure set in the manual pressure control switch 112 , that is, chipping is performed. It is characterized in that the operating pressure is automatically increased when the pressure drop information in which the pressure is normally reduced is set, and the pressure information transmitted from the pressure measurement sensor is not lower than the preset pressure drop information.

That is, the control unit moves the rock drilling machine 100 by maintaining the set operating pressure without increasing the operating pressure if the chipping is normally performed when the operator chipping a point of the concrete 10, and then By allowing the point to be chipped, and by increasing the operating pressure until one point of the concrete 10 is chipped by increasing the operating pressure if the chipping is abnormal, that is, if the chipping is not performed normally, the chipping can be performed smoothly. to realize the effect of improving work efficiency.

In addition, when chipping a point of the concrete 10, the control unit increases the operating pressure until the point of the concrete 10 is chipped if the chipping is abnormally performed, and the increase is based on the increased operating pressure After newly setting the pressure drop information in which the working pressure is normally reduced, a point in the concrete 10 is chipped, and when the pressure information transmitted from the pressure measurement sensor is lower than the new pressure drop information, the operator manually switches the pressure control switch (112) By returning the increased operating pressure to the operating pressure set in , the concrete 10 can be chipped as much as the original thickness to be chipped when chipping at other points.

This is because the pressure to be chipped, that is, the operating pressure, may be different depending on the degree of damage or deterioration of the concrete. The state in which the concrete is not chipped, that is, the state in which nothing is in contact with the chipping head 160 in consideration of the stress that the concrete can withstand by pneumatic pressure, that is, the state in which all the operating pressure is lost during operation of the chipping cylinder 140 It will be obvious that it should be set higher.

In addition, the housing 110 is installed inside the position measurement sensor to measure the vertical position and transmit the measured position information to the control unit, is provided on the upper surface, is connected to the control unit to receive and display the position information It is configured to include a position display unit (116).

The position measuring sensor measures the position of the rock drill 100, that is, the position of the housing 110, when the concrete 10 is chipped and the entire rock drill 100 is moved downward, and the position display unit 116. By displaying the position of the housing 110 so that the operator can visually check the position of the housing 110, it is confirmed whether chipping is normally made through the position of the housing 110, that is, the rock drill 100. to realize possible effects.

At this time, the position display unit 116 is characterized in that the position of the housing 110 is displayed through the increase or decrease of the length of the bar graph according to the position information measured by the position measurement sensor, for example, the housing ( When the position of 110) is at the position before chipping, if it is a position of 0, after chipping is made, the position of the housing 110 is a position of -2, which is a state moved to the lower side after chipping. By making the bar graph shorter, the operator to easily confirm the position of the housing 110 with the naked eye.

In addition, the housing 110 may be configured to include a reference position setting switch 118 provided on the upper surface to manually set a reference position by an operator, and transmit the set reference position to the control unit, the reference position setting The switch 118 allows the operator to set the position before chipping of the housing 110 as a reference position, so that, as described above, the position of the housing 110 can be more easily expressed in a bar graph. effect can be obtained.

In addition, when the position display unit 116 receives the reference position from the control unit and the length of the histogram exceeds or falls below the length corresponding to the reference position, it is characterized in that the color of the histogram is displayed differently. , this can have the effect of allowing the operator to more smoothly check the presence or absence of chipping with the naked eye when chipping through the rock drilling machine 100 that is repeatedly vibrated.

That is, the construction surface treatment step (S20) of the present invention is by chipping the concrete 10 at least twice through the rock drilling machine 100 as described above, thereby minimizing the impact of the concrete matrix and repairing the damaged area of the desired thickness in the prior art. It realizes an effect that can be accurately removed compared to that.

The rust removal treatment step (S30) of rebar rust, which is a major component for achieving the present invention

By removing the rust of the reinforcing bar exposed to the outside of the concrete pouring surface and applying a rust-removing rust preventive agent, when the construction surface treatment step (S20) is completed, the exposed to the outside of the concrete 10, that is, on the concrete pouring surface Apply rust-removing rust inhibitor to exposed reinforcing bars.

The rust-removing-type rust preventive agent is mainly composed of phosphoric acid, a specific gravity of 1.18 to 1.28, a dryness of 1 to 2 hours (15 to 30 ℃) of the rust-removing type rust preventive agent having the physical properties of the may be used, the reinforcing bar exposed outside the concrete Removes rust by neutralizing the corroded part and prevents corrosion of rebar due to acid resistance.

At this time, even after the cleaning and catchment of the concrete pouring surface in the construction surface treatment step (S20) is completed, foreign substances such as oil attached to the reinforcing bars may remain fine. Therefore, the rust removal and rust prevention treatment step (S30) of the rebar of the present invention can be made to wipe off foreign substances such as oil on the rebar using a cloth and the rust removal type rust preventive agent is applied.

In addition, as the rust-removing-type rust preventive agent needs to be repaired within a short time due to the characteristics of the structure, it is preferable to further include a volatile composition such as polyvinyl alcohol in the rust-removing type rust preventive agent to shorten the construction time, and any of the general volatile compositions It may be used, and the composition ratio is not limited because it can be implemented in various ways depending on the working environment.

The rust prevention treatment step (S40), which is a main component for achieving the present invention, is

The coating-type rust preventive agent is mixed with cement powder and applied to the reinforcing bar exposed to the outside of the concrete pouring surface, and the coated rust preventing agent is applied to the exposed reinforcing bar to the outside of the concrete pouring surface.

The coating-type rust preventive agent consists of an antioxidant as a main component, and a coating-type rust preventive agent having a specific gravity of 0.08 to 1.08 may be used, and it inhibits the recurrence of rust with an excellent rust prevention function and prevents corrosion of reinforcing bars. Accordingly, by forming a film on the surface of the reinforcing bar, it is possible to prevent the oxidation reaction of the reinforcing bar.

At this time, the coating-type rust preventive agent is mixed with cement powder and applied. Accordingly, the coating-type rust preventive agent made of water is mixed with the cement powder, so that the viscosity is improved to strengthen the adhesion.

According to the design conditions, the rust removal treatment step (S30) and the rust prevention treatment step (S40) were sequentially described, but the rust prevention treatment step (S40) is performed first, and the rust removal treatment step (S30) ) to be performed next, or the rust removal type rust preventive agent applied to the concrete pouring surface in the rebar rust removal rust prevention treatment step (S30) and the coating type rust preventive agent applied to the concrete pouring surface in the rust prevention inhibiting rust prevention treatment step (S40) at the same time It may be applied, or only one rust preventive agent selected from a rust removal type rust preventive agent and a coating type rust preventive agent may be applied in consideration of the degree of corrosion of the reinforcing bar.

The alkali recovery rust prevention treatment step (S50), which is a main component for achieving the present invention, is

As an alkali recovery treatment by applying a penetration-type rust preventive agent to the concrete pouring surface, a penetration-type rust preventive agent is applied to the concrete pouring surface to restore alkalinity of the concrete structure.

The penetration-type rust inhibitor may be used as a main component of an inorganic ionic material (lithium nitrite, silane compound-based), PH 12.5 to 13.5, and a specific gravity of 1 to 1.1. Due to this, alkalinity is reduced to the inside of the neutralized concrete structure to regenerate aged concrete. Accordingly, the chemical resistance is secured to prevent corrosion of the reinforcing bar and to improve the weather resistance.

In addition, the structure repair construction method of the present invention can be carried out after the alkali recovery rust prevention treatment step (S50) or before the adhesion reinforcement treatment step (S60) to be described later, and is installed on the damaged reinforcing bars of the existing concrete structure and poured to be described later and improving adhesion with the concrete composition to be constructed in the finishing step (S70), and installing a branched reinforcing bar to improve seismic resistance (S55); may be configured to further include.

On the other hand, it may be difficult to expect strength only by the construction of the concrete composition on the part for repair and reinforcement of the concrete 10 . Accordingly, the structure repair method of the present invention can improve the strength of the concrete structure to be repaired and reinforced, that is, by making a hole in the concrete pouring surface and inserting the branched reinforcing bar.

To explain this in detail, a space for inserting branched reinforcing bars is drilled in the concrete pouring surface to be repaired and reinforced, and branched reinforcing bars are inserted into the perforated space.

At this time, the inserted branched reinforcing bar is made in a straight shape, and a plurality of branches are extended outward, so that the strength and durability can be improved by improving the contact area with the concrete composition to be constructed and increasing the bonding force. have.

In addition, in the process of constructing and curing the constructed concrete composition, the form of the composition is uniformly hardened to prevent disorder, thereby achieving a sense of unity with the existing concrete structure even after restoration. It can provide an effect that makes it happen.

In addition, the installed branched reinforcing bar is inserted into the surface of the pre-concrete structure, that is, the concrete pouring surface, thereby increasing the bearing capacity and horizontal resistance to improve the seismic performance.

At this time, if the installation process of the branched reinforcing bar is described in more detail, the concrete pouring surface on which the branched reinforcing bar is to be installed is drilled with equipment such as a drill and cleaned using an air brush or an iron brush.

After that, by injecting a chemical anchor or the like into the perforated space and then inserting the branched reinforcement, the branched reinforcement can be firmly coupled to the existing concrete structure, that is, the concrete pouring surface.

Accordingly, a part of the branched reinforcing bar is inserted into the existing concrete structure, and the remaining part is located inside the concrete composition to be constructed in the pouring and finishing step (S70) to be described later. increase and improve durability so that the physical properties of concrete structures can be fully exhibited.

Depending on the design conditions, elastic reinforcing materials may be further installed in addition to branched reinforcing bars to reinforce the seismic performance.

Such an elastic reinforcing material is to be disposed inside the concrete composition constructed in the pouring and finishing step (S70) to be described later or on the outer circumferential surface of the concrete composition, and may be installed on the surface of the existing concrete structure by using a binding member such as a clip.

At this time, the elastic reinforcing material may be used that processed unsaturated polyester resin (unsaturated polyester resin) in the form of a plate, and can be made in any configuration as long as the structure can improve seismic performance.

Furthermore, when the elastic reinforcing material is installed, it may be configured to pulverize raw ore on its surface, spray it with a predetermined pressure, and impregnate and harden it.

Accordingly, the elastic reinforcing material is located inside the concrete composition, but it is possible to improve the adhesion performance between the resilient reinforcing material and the concrete composition constructed to surround the elastic reinforcing material in the pouring and finishing step (S70) to be described later.

Here, the live ore, as a sericite series, emits far-infrared rays and rapidly provides heat conduction to hydrolyze toxic substances such as formaldehyde formed by hydration of the concrete composition.

The adhesion reinforcement processing step (S60), which is a main component for achieving the present invention, is

By applying the adhesive composition to the concrete pouring surface, the adhesive composition is applied to the concrete pouring surface to construct the existing concrete and a concrete composition to be described later, and is applied for adhesion with the concrete.

Accordingly, the adhesive composition is selected from those having a strong adhesive force such as repair reinforcement of concrete structures, filling and repair of cracks, adhesion of tiles, bricks, marble, metal, glass blocks, silicon, etc., and adhesion enhancers of mortar and molding adhesives It is preferable to use

In addition, the adhesive composition is applied to a concrete pouring surface with a clean surface, not the adhesion enhancer or molding adhesive as described above, and is in contact with the concrete composition to be constructed in the pouring and finishing step (S70) to be described later. It may consist of a mixed composition to be described later to prevent the detachment phenomenon in advance to minimize the frequency of occurrence of poor construction.

Depending on the design conditions, the adhesive composition may be applied on the outer peripheral surface of the branched reinforcing bar installed in the branched reinforcing bar installation step (S55).

Accordingly, when the adhesive composition is applied to the branched reinforcing bars installed in a protruding form to the outside of the pre-concrete structure, the concrete composition constructed in the pouring and finishing step (S70) to be described later is constructed so as to surround the branched reinforcing bars, The polyethylene terephthalate of the adhesive composition applied to the outer peripheral surface of the branched reinforcing bar and polyhydroxy aminoether (PHAE) of the concrete composition reacted to increase the adhesiveness between the branched reinforcing bar and the concrete composition, thereby increasing the adhesion strength and Durability can be improved.

The adhesive composition used in the adhesion enhancement treatment step (S60) is 5 to 30% by weight of finely divided silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of a color pigment, 1 to 30% by weight of an extender pigment, 0.1 to 2 of a blocking agent % by weight, polymerization accelerator 0.1 to 3% by weight, anti-settling agent 0.1 to 2% by weight, dispersing agent 0.1 to 0.5% by weight, and characterized in that it is composed of 20 to 45% by weight of the adhesion promoter.

In addition, the adhesive composition may further include 5 to 15% by weight of polyethylene terephthalate.

The finely divided silica improves the durability of the adhesive composition and increases the strength, and when less than 5% by weight is mixed, the strength decreases, and when it exceeds 30% by weight, the improvement effect is insufficient.

Calcium carbonate improves flowability as an adhesive composition and improves whiteness.

The coloring pigment is used to give the color of the composition, and it prevents the heterogeneous color expression of the part to be repaired and reinforced with the existing concrete by maintaining the same color as the surface of the existing concrete, that is, the concrete pouring surface, thereby inhibiting the aesthetic effect. can be prevented in advance.

The extender pigment has the effect of improving the fluidity, viscosity, strength and durability of the adhesive composition and controlling the gloss. When less than 1 wt% is mixed, the viscosity is low, and the adhesion with the surface to be constructed is lowered, and when it exceeds 30 wt%, the extender pigment is There is a problem in that the luster is thickly produced, which impairs the aesthetic effect.

The blocking agent performs a function of blocking ultraviolet rays, and may be coated after the adhesive composition is applied through the coating or may be included in the adhesive composition for internal use.

The accelerator is added to promote this in mixing the adhesive composition, and may be composed of an iron salt mixed with N, N-dimethylaniline, tetrahydroquinoline, triethylamine, and benzoin, preferably N, N- It may consist of dimethylaniline.

If less than 0.1% by weight of the accelerator is mixed, curing failure may be caused, and if it exceeds 3% by weight, yellowing of the coating film may occur.

The anti-settling agent is to increase the viscosity and impart thixotropic properties, and various anti-settling agents may be used, but selected from the group consisting of ethyl hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, organic bentonite, and silica compounds. It is preferable to use any one or a mixture of two or more thereof.

When the amount of the anti-settling agent is less than 0.1% by weight, a precipitate is formed and layer separation occurs, and when it exceeds 2% by weight, the viscosity is excessively increased and thixotropic properties are high, thereby inhibiting fluidity.

The dispersant prevents material separation and increases fluidity to improve workability. An unsaturated polycarboxylic acid-based dispersant can be used, and when less than 0.1 wt% is mixed, material separation is easy to occur, whereas 0.5 When it exceeds the weight %, strength and durability may be reduced.

The adhesion promoter may include 20 to 45% by weight based on the total components of the adhesive composition. Specifically, 5 to 25% by weight of an acrylate or methacrylate polymer, 0.5 to 5% by weight of a silane coupling agent, 5 to 30% by weight of a urethane acrylate, 20 to 65% by weight of a polyol, and 20 to 30% by weight of a diisocyanate It can be made by mixing.

The acrylate or methacrylate polymer has a range of 5 to 25 wt%, and when it has the above range, the viscosity of the adhesive composition is improved to prevent deterioration of workability.

According to design conditions, 5 to 15 parts by weight of butyl acrylate may be mixed with respect to 100 parts by weight of the acrylate or methacrylate polymer.

Such butyl acrylate imparts flexibility to the coating film, and functions to prevent shrinkage of the coating film that occurs when the adhesive composition and the concrete composition to be described later are combined, and 5 parts by weight based on 100 parts by weight of the acrylate or methacrylate polymer When less than 15 parts by weight are mixed, cracks may be induced by the shrinkage of the coating film and the adhesive performance may be deteriorated. May cause yellowing.

The silane coupling agent is bonded through a condensation reaction between the silica-based filler and the polymer, and may be composed of aminosilane, and more preferably composed of 3-aminopropyl-triethoxysilane.

Here, aminosilane has an organic container that binds to an organic material and a hydrolyzable group that reacts with the organic material in the same molecule, and plays a role in binding the two, so that the paint (rust inhibitor, etc.) applied to the base concrete surface and the inorganic polymer Improves adhesion and durability between mortar compositions.

Urethane acrylate is a component having high friction resistance, rigidity and flexibility, and improves cohesive strength and adhesive properties of the adhesive composition, as well as makes the molecular structure flexible, and may be used in an amount of 5 to 30 wt%.

Polyol affects fluidity and workability before curing, and affects physical and chemical performance after curing, and can be used in the range of 20 to 65% by weight, and when it exceeds 65% by weight, blistering ( blistering) and staining may occur.

As the diisocyanate, various diisocyanates of aromatic, aliphatic or alicyclic may be used, and may be preferably made of aliphatic isocyanate, and may be used in an amount of 20 to 30% by weight.

Among these aliphatic isocyanates, isophorone diisocyanate which produces less yellowing and less control of exothermic reaction may be used.

According to design conditions, the adhesive composition may further include 1 to 10 wt% of an additive.

Such additives include one or more selected from defoamers, flame retardants, dispersants, plasticizers, antioxidants and surfactants.

Antifoaming agents are used to increase strength and durability when repairing and reinforcing concrete structures by removing pores in the adhesive composition. etc. may be used.

At this time, the alcohol-based anti-foaming agent may be made of glycol, etc., the silicone-based anti-foaming agent may be made of dimethyl silicone oil, polyorganosiloxane, fluorosilicone oil, etc., and the fatty acid-based anti-foaming agent may be made of stearic acid, oleic acid, etc., The oil-based antifoaming agent may be made of kerosene, animal and vegetable oil, castor oil, etc., the ester-based antifoaming agent may be composed of solitol trioleate, glycerol monoricinolate, etc., and the oxyalkylene-based antifoaming agent may be polyoxyalkylene , acetylene ethers, polyoxyalkylene fatty acid esters, polyoxyalkylenealkylamines, and the like.

The flame retardant may be a mixture containing aluminum hydroxide and antimony trioxide, and acts to prevent oxidation and corrosion by acting on the part where the adhesive composition is in contact with the reinforcing bar exposed on the surface of the concrete, and increases the heat resistance. It is possible to improve the flame retardant effect.

The dispersant aims to improve workability by improving the dispersibility of the adhesive composition, and may be made of polycarboxylic acid-based, naphthalene-based, melamine-based, or the like. Preferably, a polycarboxylic acid-based dispersant may be used.

The plasticizer is for improving the rheological properties, and it has excellent compatibility with the polymer among the adhesion promoters included in the adhesive composition, and thus can more effectively impart adhesion promotion. At this time, if the amount of the plasticizer used increases, the mechanical strength of the adhesive composition may be weakened, and if a small amount is included, the viscosity is high, and there is a problem in that smoothness is reduced during operation.

Therefore, it is preferable to mix with the acrylate or methacrylate polymer for controlling the viscosity in an appropriate ratio.

The antioxidant is to prevent oxidation of the surface of the concrete base, and amine-based, bisphenol-based, monophenol-based and sulfur-based antioxidants may be used.

On the other hand, polyethylene terephthalate is polyhydroxyaminoether (PHAE) included in the concrete composition constructed in the pouring and finishing step (S70), so that the concrete composition has strong adhesion with the adhesive composition and strong resistance to peeling. to have

The adhesive composition having such a configuration is brought into contact with a mixture of the concrete composition and water to be constructed in the pouring and finishing step (S70) to be described later to improve the adhesion performance between the surface of the concrete structure and the concrete composition to be constructed by the adhesion reaction. have.

The pouring and finishing steps (S70), which are the main components for achieving the present invention, are

By pouring and curing the concrete composition on the pre-concrete pouring surface, when the adhesive composition is applied in the adhesion reinforcement treatment step (S60), the concrete composition is constructed.

The concrete composition used in the pouring and finishing step (S70) of the present invention is 20 to 30% by weight of alumina cement, 2 to 4% by weight of sodium carbonate, 3 to 5% by weight of alum, 1 to 3% by weight of water reducing agent, 4 to silicic acid compounds 6% by weight, 19 to 29% by weight of Portland cement. 35.9 to 41.9% by weight of silica sand, 0.05 to 0.15% by weight of polyvinyl alcohol, 1.3 to 2% by weight of silica fume, and 0.75 to 1% by weight of rice hull silica.

In addition, the concrete composition used in the pouring and finishing step (S70) of the present invention is further mixed with 5 to 10 parts by weight of polyhydroxy aminoether (PHAE) with respect to 100 parts by weight of the mixed concrete composition as described above. characterized in that

Portland cement or alumina cement is used as an inorganic adhesive, and alumina cement serves as an auxiliary agent for expanding agent. It is included in weight %, and 24 weight % is suitable.

The silica sand serves as a curing agent and is included in an amount of 35.9 to 419% by weight, and when it exceeds 35.9% by weight, it is too hardened, and when it is less than 41.9% by weight, it is too soft, so 36.45% by weight is suitable.

The silicic acid-based compound uses any one compound selected from sodium silicate, potassium silicate, lithium silicate, and calcium silicate, and is used to penetrate deep into cracks and damaged areas of the existing concrete structure, that is, the concrete pouring surface, 4 to 6 weight %, and if it is less than 4% by weight, the performance is deteriorated, and if it exceeds 6% by weight, the properties of the silicic acid-based compound are strong and uneconomical, so 5% by weight is preferable.

The alum is called alum, and it is a hexagonal crystal mineral, and is formed by the action of sulfur of volcanic gas on white, transparent to translucent volcanic rocks in the shape of flakes or soil, or sulfuric acid contained in groundwater acting on alumina rocks, and the chemical composition is KAl3(OH)6(SO4)2, which acts as an expanding agent, is contained in 3 to 5 wt%, and when it exceeds 5 wt%, the waterproof function is deteriorated, and when it is less than 3 wt%, evaporation rate and solubility are insufficient. Since problems occur, 4% by weight is appropriate.

The water reducing agent is a condensate obtained by condensing a single compound of naphthalenesulfonic acid with formaldehyde (Japanese Patent Application Laid-Open No. 61-83659), a formaldehyde condensate of sulfonated melamine, or a lignin sulfonic acid sodium salt. Any one compound is used, Included in 1 to 3% by weight, if it exceeds 3% by weight, it becomes too thin, and if it is less than 1% by weight, the water reducing agent function is lowered, so 2% by weight is suitable.

The sodium carbonate has strong hygroscopicity as a white powder, and is included in 2 to 4 wt%, and if it exceeds 4 wt%, it is uneconomical, and if it is less than 2 wt%, the properties of sodium carbonate are lowered, so 3 wt% is suitable.

The polyvinyl alcohol helps the waterproofing agent to adhere well to the surface of the construction body during the construction process, and evaporates at a low temperature to attract and remove moisture, promotes the chemical reaction of alkoxysilane, and is a non-polar hydrocarbon component. It is used to suppress the generation of static electricity without additional additives by partially polarizing the solvent composed of

The polyvinyl alcohol is contained in an amount of 0.05 to 0.15% by weight, and when it exceeds 0.15% by weight, it adheres too well to the concrete pouring surface, but the waterproofing layer is diluted and the moisture removal effect due to evaporation is large, and when it is less than 0.05% by weight, the concrete is poured Although it does not adhere well to the surface of the cotton and the waterproofing layer becomes thick, 0.1 wt% is suitable because the moisture removal effect due to evaporation is small.

As the silica fume includes rice hull silica, which will be described in detail later, it fills micropores of several nanometers formed in the rice hull silica itself to realize higher strength and improved durability.

The silica fume is contained in an amount of 1.3 to 2% by weight, and when it is less than 1.3% by weight, the effect of improving strength and durability is insignificant, and when it exceeds 2% by weight, the physical properties of the entire concrete composition are inhibited, so that the nutrient effect by other compositions is insignificant. Since there is a problem of release, 1.6 wt% is suitable.

The rice hull silica, as an eco-friendly material, has pores of several nanometers in itself, and thus has an effect of improving strength and durability as it is mixed with the silica fume described above.

The rice hull silica is contained in 0.75% by weight to 1% by weight, and if it is less than 0.75% by weight, the effect of improving strength and durability by silica fume is insignificant, and if it exceeds 1% by weight, the silica fume is not filled by the pores due to the strength and Since there is a problem that durability may be reduced, 0.85 wt% is suitable.

In addition, the rice hull silica can be obtained through the steps of obtaining a heavy sea solution residue and a heavy sea solution after treating the rice hull, and separating the rice hull silica from the heavy sea solution. Since the method may be used, a detailed description of the method for obtaining rice hull silica will be omitted.

In addition, rice hull is not only difficult to corrode because its outer shell is densely coated with silica, but also has high abrasion resistance, large volume, and low nutrient content, which makes it unsuitable for use as feed and industrial raw materials. Although it has been restricted, about 10 to 20% by weight of silica having micropores of several nanometers in itself is included.

That is, as described above, rice hull silica used in the present invention can be used together with ultrafine silica fume to increase the effect of improving strength and durability by the silica fume.

The polyhydroxy aminoether (PHAE) reacts with polyethylene terephthalate included in the above-described adhesive composition to form a barrier layer to have excellent adhesion and waterproof performance. Based on 100 parts by weight of the concrete composition, 5 to 10 weight If it is included in parts, and if it is less than 5 parts by weight, the reaction with polyethylene terephthalate contained in the adhesive composition is insignificant and the adhesion is reduced, and if it exceeds 10 parts by weight, the physical properties of the concrete composition are lowered due to the use of unnecessary polyhydroxyaminoether 7 parts by weight is appropriate because it is difficult to expect durability.

The structure repair method made through this process minimizes the impact of the concrete matrix by chipping the concrete 10 of the other structures at least twice through the pneumatic rock drilling machine 100, as well as the existing concrete structures, that is, It is possible to obtain the effect of improving the adhesion with the pouring surface inside the futa so that a more stable and robust repair can be made.

The above has been described with reference to a preferred embodiment of the present invention, and is not limited to the above embodiment, and a person of ordinary skill in the art through the above embodiment does not deviate from the gist of the present invention It can be implemented with various changes in

10: concrete
20: asphalt
30: cutting machine
100: rock drill
110: housing
112: manual pressure control switch
114: pneumatic display unit
116: position display unit
118: reference position setting switch
120: handle part
130: connecting support bar
140: Cylinder for chipping
150: transmission pipe
160: chipping head

Claims (10)

A preparation step (S10) of cutting between the concrete 10 and the asphalt 20 of the structure using a cutting machine 30, but cutting by the thickness of the concrete 10; and
Using the pneumatic rock drill 100, the concrete 10 is chipped at least twice and then removed to form a concrete pouring surface, and a construction surface treatment to remove dust from the concrete pouring surface using a high-pressure washer step (S20); and
Rebar rust removal rust prevention treatment step (S30) of removing the rust of the rebar exposed to the outside of the concrete pouring surface and applying a rust removal type rust preventive agent; and
A rust-inhibiting rust-preventing treatment step (S40) of mixing and applying a coating-type rust preventive agent with cement powder to the reinforcing bars exposed to the outside of the concrete pouring surface (S40); and
Alkali recovery rust prevention treatment step (S50) of applying a penetration-type rust preventive agent to the concrete pouring surface to restore alkalinity (S50); and
Adhesive reinforcement processing step of applying an adhesive composition to the concrete pouring surface (S60); and
Constructed including a; pouring and finishing step (S70) of pouring and curing the concrete composition on the concrete pouring surface;
The concrete composition is
Alumina cement 20 to 30% by weight, sodium carbonate 2 to 4% by weight, alum 3 to 5% by weight, water reducing agent 1 to 3% by weight, silicic acid-based compound 4 to 6% by weight, Portland cement 19 to 29% by weight. 35.9 to 41.9% by weight of silica sand, 0.05 to 0.15% by weight of polyvinyl alcohol, 1.3 to 2% by weight of silica fume, and 0.75 to 1% by weight of rice hull silica,
The rock drill 100 is
housing 110; and
a control unit installed inside the housing 110; and
Doedoe installed on the outside of the housing 110, is installed so that the operator can grip, the handle portion 120 is provided with an operation switch; and
Connection support rod 130 coupled to the lower portion of the housing 110; And
Chipping cylinder 140 coupled to the lower portion of the connecting support rod 130; and
a power transmission pipe 150 coupled to a lower portion of the chipping cylinder 140 and operated by the chipping cylinder 140; and
It is configured to include a; chipping head 160 coupled to the lower portion of the power transmission pipe 150,
The chipping cylinder 140 is
A pressure measuring sensor installed inside to measure the pressure generated as the power transmission pipe 150 operates, and transmit the measured pressure information to the control unit; and is configured to include,
The housing 110 is
Manual pressure control switch 112 provided on the upper surface so that the operator can manually adjust the operating pressure of the chipping cylinder 140 to set it; and
A pneumatic display unit 114 provided on the upper surface and connected to the control unit to receive and display pressure information;
the control unit
When the power transmission pipe 150 is operated by the chipping cylinder 140, the pressure drop information is set in which the operating pressure is normally reduced based on the operating pressure set in the manual pressure control switch 112, and the pressure measuring sensor A pneumatic chameng machine that automatically increases the operating pressure if the pressure information received from the system does not become lower than the preset pressure drop information A repair method that can secure quality by using a type of emergency repair system.
delete delete delete According to claim 1,
The housing 110 is
A position measuring sensor installed inside to measure the vertical position and transmit the measured position information to the control unit; and
It is provided on the upper surface, and is connected to the control unit to receive and display the position information. The pneumatic type chamam machine, characterized in that it includes; A repair method that can secure quality by using a premix type emergency repair agent that contains an appropriate amount of admixture.
6. The method of claim 5,
The position display unit 116 is
It is a pneumatic chamam machine characterized in that the position of the housing 110 is displayed through the length of the bar graph according to the position information. It is a premix type that minimizes vibration and damage to the structure body and contains an appropriate amount of excellent concrete admixture. A repair method that can secure quality by using an emergency repair system.
7. The method of claim 6,
The housing 110 is
It is provided on the upper surface, the operator manually sets the reference position, and the reference position setting switch 118 for transmitting the set reference position to the control unit; is configured to include,
The position display unit 116 is
When the length of the histogram is greater than or less than the length corresponding to the reference position by receiving the reference position from the control unit, the color of the histogram is displayed differently. A repair method that minimizes vibration and damage and uses a premix type emergency repair agent that contains an appropriate amount of excellent concrete admixture to ensure quality.
A preparation step (S10) of cutting between the concrete 10 and the asphalt 20 of the structure using a cutting machine 30, but cutting by the thickness of the concrete 10; and
Using the pneumatic rock drill 100, the concrete 10 is chipped at least twice and then removed to form a concrete pouring surface, and a construction surface treatment to remove dust from the concrete pouring surface using a high-pressure washer step (S20); and
Rebar rust removal rust prevention treatment step (S30) of removing the rust of the rebar exposed to the outside of the concrete pouring surface and applying a rust removal type rust preventive agent; and
A rust-inhibiting rust-preventing treatment step (S40) of mixing and applying a coating-type rust preventive agent with cement powder to the reinforcing bars exposed to the outside of the concrete pouring surface (S40); and
Alkali recovery rust prevention treatment step (S50) of applying a penetration-type rust preventive agent to the concrete pouring surface to restore alkalinity (S50); and
Adhesive reinforcement processing step of applying an adhesive composition to the concrete pouring surface (S60); and
Constructed including a; pouring and finishing step (S70) of pouring and curing the concrete composition on the concrete pouring surface;
The concrete composition is
Alumina cement 20 to 30% by weight, sodium carbonate 2 to 4% by weight, alum 3 to 5% by weight, water reducing agent 1 to 3% by weight, silicic acid-based compound 4 to 6% by weight, Portland cement 19 to 29% by weight. 35.9 to 41.9% by weight of silica sand, 0.05 to 0.15% by weight of polyvinyl alcohol, 1.3 to 2% by weight of silica fume, and 0.75 to 1% by weight of rice hull silica,
The adhesive composition is
5 to 30% by weight of finely divided silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of a color pigment, 1 to 30% by weight of an extender pigment, 0.1 to 2% by weight of a blocking agent, 0.1 to 3% by weight of a polymerization accelerator, 0.1 an anti-settling agent to 2% by weight, dispersing agent 0.1 to 0.5% by weight, and adhesion promoter 20 to 45% by weight of the pneumatic chamam machine, which minimizes vibration and damage to the structure body and contains an appropriate amount of excellent concrete admixture A repair method that can secure quality by using a premix type emergency repair system.
9. The method of claim 8,
The adhesive composition is
A pneumatic chamrock machine, characterized in that it is made by further mixing 5 to 15% by weight of polyethylene terephthalate, minimizes vibration and damage to the structure body, and uses a premix type emergency repair agent containing an appropriate amount of excellent concrete admixture to ensure quality. possible repairs.
10. The method of claim 9,
The concrete composition is
With respect to 100 parts by weight of the concrete composition, 5 to 10 parts by weight of polyhydroxy aminoether are further mixed with a pneumatic chamam machine that minimizes vibration and damage to the structure's matrix and contains an appropriate amount of excellent concrete admixture. A repair method that can secure quality by using an emergency repair system.

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