KR101457386B1 - High-ductile jointless device for preventing of water leakage and the installation method thereof - Google Patents

Abstract

The present invention relates to a high-ductile and jointless connection device preventing water leakage and a construction method thereof. More specifically, the present invention can enhance the running performance of a vehicle by being built without joints and enhance the durability of a bridge by fundamentally preventing the leakage of the water on a road surface. The present invention can also solve the problems caused by vibrations and noises due to level difference to enhance the running performance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-

The present invention relates to a high-strength joint-free joint for preventing leakage and a method of constructing the same, and more particularly, it relates to a joint- And more particularly, to a high-tensile joint-free joint which prevents water leakage which can improve the durability of a bridge as the bridge is prevented.

Recently, the most problematic aspect of the maintenance of small bridges is the expansion / contraction part provided in the alternating superstructure. These expansion joints absorb the expansion and contraction of the bridge deck depending on the expansion and contraction of the bridge due to the temperature due to the diagonal or longitudinal movement, and drains the road surface of the bridge to the outside.

At this time, the expansion joint device should be installed mainly on a bridge having a long length of bridge. In Korea, expansion joint device is installed in almost all bridges except a part of concrete ramen bridge.

This expansion joint system requires periodic replacement because it is difficult to use semi-permanently. However, since the cost is very high and the vehicle must be completely restrained to repair it, the maintenance expenditure due to continuous maintenance is large. Small bridges, except for the bridge, have not been able to maintain maintenance of the expansion joint. Therefore, when damages occur in the expansion joint device, the drainage function is lowered, and the road surface including the snow remover is often leaked to the bridge. As a result, the bridges such as the shift, A phenomenon that various deterioration phenomena due to freezing and thawing is accelerated.

Due to such a phenomenon, when the contraction device is deformed due to the temperature of the alternating upper plate, it fails to fulfill its original function or eventually the contraction device is damaged.

Further, when the expansion joint device is damaged, the alternate top plate such as slab and asphalt disposed around the bridge is damaged, and the aging of the bridge is accelerated, so that there is a risk of traffic accident, and the cost of repair and replacement of the bridge is further increased The problem could have occurred.

In addition, when a vehicle running at high speed passes through an expansion joint of a bridge, impact or vibration is easily transmitted to the vehicle, resulting in poor running characteristics. As noise and vibration spread around the vehicle, the speed of the vehicle There is a problem that it is accompanied with discomfort and the like.

As a prior art for solving these problems, Korean Patent No. 10-089454 (hereinafter referred to as "Prior Art 1") discloses a non-jointed bridge, and Korean Patent No. 10-089454 -0891979 (hereinafter referred to as "Prior Art 2") is related to a dual structural shift and a non-jointed bridge using the same, and Korean Patent No. 10-0398509 (issued on September 19, 2003, (Hereinafter referred to as "Prior Art 3") has an invention relating to a joint construction method of a road, a bridge or a structure.

The prior art document 1 relates to a non-jointed bridge in which an extension slab is installed to convert the expansion and contraction of a bridge into a slide movement, and the preceding document 2 relates to a method of constructing a jointless bridge using mutually independent double structure alternation. However, the prior art 1 and the prior art 2 are inconvenient to use only for new bridges because it is difficult to use for maintenance of existing bridges, and there is a problem that it is costly to use for bridges of extension lengths of 50M or less there was.

Also, in the prior art documents 1 and 2, there is a fear that the shear of the finger may be deformed if a large expansion amount is generated, and there is a problem that it needs to be replaced for regular maintenance management.

On the other hand, the prior art document 3 relates to a joint construction method in which a backup agent is installed at a joint, a steel plate is fixedly installed, and a road sealant is placed on the steel plate. However, in the prior art document 3, there is a concern that the steel sheet is corroded, and there is a problem that surface cracks frequently occur due to the vibration of the steel sheet due to the vehicle's under-load due to the problem of the slab surface and the step difference.

In addition, there is a problem that plastic deformation easily occurs in the road sealing material region due to the heavy load of the middle vehicle, and shock and vibration are generated due to such plastic deformation.

SUMMARY OF THE INVENTION The present invention has been accomplished in view of the above problems, and it is an object of the present invention to provide a vehicle control system that can be installed in a jointless manner to improve a running property of a vehicle, prevent water leakage due to road surface water, Which is capable of improving the durability of the non-jointed joint, and a method of manufacturing the same.

In order to accomplish the above object, there is provided a tough, non-joint joint for preventing leakage according to the present invention, wherein a first floor slab is formed on an upper portion of the first floor slab, and a second floor slab is formed on an upper portion of the second floor slab. A high tenacity joint-free joint which is installed between a mold and a fluid of the alternating mold and a mold and connects the alternating mold and the mold, wherein one end and the other end are bent to connect the alternating mold and the mold, A plurality of first reinforcing bars embedded in the mold; An adhesion enhancer applied between the alternating and the mold oil; And the first and second bottom slabs are connected flatly while the first reinforcing bars are embedded, the first and second bottom slabs being smoothly connected to each other, and to 100 parts by weight of the premix type ultra fast lightweight powder, 15-30 parts by weight and And 5 to 20 parts by weight of high tensile staple fibers are mixed, wherein the adhesive strengthening agent is divided into a first adhesive surface and a second adhesive surface, which are formed on the same horizontal line by being embedded in the first reinforcing bar, Wherein the first adhesive surface and the second adhesive surface are applied only to the first adhesive surface and the second adhesive surface of the mold and the second elastic surface, and the lubricant is applied to the first elastic surface and the second elastic surface, .

At this time, the high-tensile joint-free joint preventing leakage may further include a backup agent installed between the shift and the mold.

The pre-mix type quick-drop powder is prepared by mixing 20 to 50% by weight of a quick-setting binder mixed with at least one of ultra fast speed cement, ultra fast speed calcium sulfoaluminate, jet cement, alpha type hemihydrate gypsum and ordinary portland cement, 15 to 40% by weight of an inorganic binder mixed with at least one of ash, silica fume, blast furnace slag fine powder and calcium carbonate, 20 to 40% by weight of microfibre silica, at least one of CSA-based swelling agent, shrinkage reducing agent and anhydrous gypsum 0.01 to 0.5% by weight of a functional additive mixed with at least one of a fluidizing agent, a powder resin, a thickener, an antifoaming agent and a retarding agent may be mixed with 1 to 5% by weight of the mixed expanding agent.

Further, the first reinforcing bars may be formed into a pair of two "a" -shaped shapes, and each of the first reinforcing bars may be embedded in the alternating mold and the mold so as to face each other.

In addition, the high-tensile joint-free joint device for preventing leakage may further include a second reinforcing bar disposed in a lateral direction orthogonal to the first reinforcing bars and tightened with a plurality of first reinforcing bars.

In addition, the high-strength joint-free joint preventing leakage may further include a plurality of partitions formed in a transverse direction orthogonal to the first reinforcing bars, tightened with the first reinforcing bars, and dividing the cement composite have.

According to another aspect of the present invention, there is provided a method of manufacturing a high-strength joint-free joint to prevent water leakage, the method comprising: installing a backup agent between an alternation and a mold; A step of piercing the gap between the alternating mold and the mold to form a hole and injecting epoxy into the hole; A connecting step of embedding the bent one end of the first reinforcing bar bent at one end and the other end into the alternate holes and connecting the bent end to the holes of the mold to connect the alternation and the mold; An application step of applying an adhesion promoter between the alternation and the oil of the mold; And a pouring step of pouring the cement mixture to the same height as the first bottom slab and the second bottom slab formed on the upper portion of the mold and the alternation between the alternation and the flow of the mold, 15 to 30 parts by weight of the compounding agent and 5 to 20 parts by weight of the high tensile staple fiber are mixed with 100 parts by weight of the first reinforcing bar, and the bonding reinforcing agent is divided into the inside and outside by the embedding of the first reinforcing bar, Wherein the first adhesive surface and the second elastic surface of the alternate first adhesive surface and the second adhesive surface of the mold and the second elastic surface are applied only to the first adhesive surface and the second adhesive surface, And the surface is coated with lubricating oil or attached with vinyl.

The pre-mix type quick-drop powder is prepared by mixing 20 to 50% by weight of a quick-setting binder mixed with at least one of ultra fast speed cement, ultra fast speed calcium sulfoaluminate, jet cement, alpha type hemihydrate gypsum and ordinary portland cement, 15 to 40% by weight of an inorganic binder mixed with at least one of ash, silica fume, blast furnace slag fine powder and calcium carbonate, 20 to 40% by weight of microfibre silica, at least one of CSA-based swelling agent, shrinkage reducing agent and anhydrous gypsum 0.01 to 0.5% by weight of a functional additive mixed with at least one of a fluidizing agent, a powder resin, a thickener, an antifoaming agent and a retarding agent may be mixed with 1 to 5% by weight of the mixed expanding agent.

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In addition, the method for installing the high-tensile joint-free joint preventing leakage may further include a pre-treatment step of removing and removing the joint and post-installation existing before the installation step.

The present invention relates to a high-strength joint-free joint and a method of constructing the joint-free joint according to the present invention, which can improve the running property of a vehicle by preventing joint leakage, And it is possible to solve the vibration and noise problem caused by the step or the like, so that the running ability can be improved.

Further, according to the present invention, there is provided a high-tensile joint-free joint device and a construction method thereof, which are excellent in durability using a cement composite material and a reinforcing bar excellent in crack control performance and tensile strain performance by multiple cracks, It is possible to reduce the cost of construction and maintenance and maintenance.

Also, according to the present invention, there is provided a high-tensile joint-free joint device and a method of constructing the same that can improve crack control performance by dividing a cement composite by a partition provided between alternating and casting molds.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a tough, non-joint joint preventing leakage of water according to an embodiment of the present invention,
2 is an enlarged view of an enlarged view of FIG. 1,
Fig. 3 is a cross-sectional view showing another embodiment of the first reinforcing bar of the high-tensile joint-free joint of Fig. 1,
Fig. 4 is an exploded perspective view showing a high-tensile joint-free joint preventing leakage of water in Fig. 1,
Fig. 5 is an exploded perspective view showing a second reinforcing bar of the tough, non-joint jointing device of Fig. 1,
FIG. 6 is a perspective view showing a partition of the high-tensile joint-free joint preventing leakage of water in FIG. 1,
FIG. 7 is a graph showing deformation of the reinforcing bars of the high-tensile joint-free joint according to the temperature change of FIG. 1,
Figs. 8 to 9 are flow charts showing a method of constructing a high-tensile joint-free joint to prevent water leakage in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully with reference to the accompanying drawings, in which embodiments of the invention are shown.

FIG. 1 is a cross-sectional view showing a toughness-free joint-free joint preventing leakage of water according to one embodiment of the present invention, FIG. 2 is an enlarged view of FIG. Fig. 4 is an exploded perspective view showing a high-tensile joint-free joint preventing leakage of water in Fig. 1, Fig. 5 is an exploded perspective view showing a leakage preventing structure of Fig. And FIG. 6 is a perspective view showing a partition of a high-tensile joint-free joint preventing leakage of water in FIG. 1. FIG. 6 is an exploded perspective view showing a second reinforcing bar of the high-

Referring to FIGS. 1 to 6, the high-tensile joint-free joint 100 for preventing water leakage according to one embodiment of the present invention can be installed in a jointless manner to improve the running properties of a vehicle, And the durability of the bridge can be improved as leakage is prevented.

The high-strength joint-free joint 100 for preventing water leakage is mainly composed of two components, that is, a first reinforcing bar 120 and a cement composite 130. [ In this case, the high-tensile joint-free joint device 100 for preventing leakage includes an alternation 10 in which a first bottom slab 11 is formed at an upper portion, (10) and the mold (20) are installed between the mold (20) in which the mold (21) is formed.

The high-strength joint-free joint 100 according to the present invention can be used only for bridges of less than 50M, which can be used semi-permanently and can maintain the leakage prevention performance even if cracks occur.

A plurality of the first reinforcing bars 120 are formed and are embedded in the alternating mold 10 and the mold 20 in the longitudinal direction parallel to the mold 20 to connect the alternating mold 10 and the mold 20. [

As shown in FIG. 3, the first reinforcing bars 120 may be formed in a shape 120 'formed by a pair of two' A 'shapes, and the first reinforcing bars 120 and the second reinforcing bars 120' (Not shown) and can be tightened with each other by a long iron wire (not shown).

The cement composite material 130 is applied between the alternation 10 and the oil of the mold 20, and 15 to 30 parts by weight of the compounding agent and 5 to 20 parts by weight of the high-tension shortening fiber are mixed with 100 parts by weight of the premixed quick- .

Accordingly, the direct tensile strain is at least 0.5%. If the tensile strain is less than 0.5%, the elasticity of the bridge due to the temperature change can not be absorbed, which increases the probability of damage to the joint 100. Therefore, the direct tensile strain should be at least 0.5% or more, and most preferably at least 1.5%.

Also, in the direct tensile test and the flexural test, the stress does not decrease even after the initial crack is generated, and the strain hardening, in which the stress is increased again, is increased. At this time, if the strain hardening is not expressed, the stress is concentrated on the initial crack portion when the joint 100 is damaged due to the expansion and contraction of the bridge, thereby increasing the probability of local damage. Therefore, the coupling device 100 must be made to exhibit strain hardening.

Further, in the strain hardening process, a multiple crack characteristic manifesting innumerable microcracks with a crack width of 100 μm or less is developed. If the multiple crack characteristics are not expressed, the crack width generated in the coupling device 100 is greatly increased, and the leakage preventing performance after cracking can not be maintained. On the other hand, if the multiple crack characteristics are manifested, even if a large amount of elongation occurs due to a temperature change, the coupling device 100 can control the expansion / contraction amount to micro-cracks of 100 mu m or less, It is possible to maintain the leak prevention performance continuously.

Also, the premix type quick-drop powder may be prepared by mixing 20 to 50% by weight of fly ash with 20 to 50 wt% of fly ash mixed with at least one of ultralow speed cement, ultralow speed calcium sulfoaluminate, jet cement, alpha type hemihydrate gypsum and ordinary Portland cement, 15 to 40% by weight of an inorganic binder mixed with at least one of blast furnace slag fine powder and calcium carbonate 20 to 40% by weight of microfibrous silica Expander 1 to 5 mixed with at least one of a CSA-based swelling agent, a shrinkage reducing agent and anhydrous gypsum And 0.01 to 0.5% by weight of a functional additive in which at least one of a fluidizing agent, a powder resin, a thickener, an antifoaming agent and a retarding agent are mixed.

The high-tensile joint-free joint 100 for preventing the leakage may further include a backup agent 110 installed between the alternate 10 and the mold 20.

The high-strength joint-free joint 100 for preventing water leakage further includes a second reinforcing bar 140 disposed in a lateral direction orthogonal to the first reinforcing bars 120 to be tightened with the plurality of first reinforcing bars 120 can do.

At this time, the second reinforcing bars 140 are tightened with the first reinforcing bars 120 to prevent the first reinforcing bars 120 from contracting or expanding in the transverse direction.

The high-tensile joint-free joint 100 for preventing water leakage is disposed in a transverse direction orthogonal to the first reinforcing bars 120 to be tightened with a plurality of first reinforcing bars 120, And may further include a plurality of partitions 150 that divide.

At this time, the plurality of partitions 150 can prevent the first reinforcing bars 120 from contracting or expanding in the lateral direction, and can divide a portion where the cement composite agent 130 is placed.

The cement composite agent 130 may have a structure in which the cement composite agent 130 acts as an integral body or when the cement composite agent 130 is divided by the plurality of partitions 150, 100) can be further increased.

The high tensile staple fiber may be high tensile PVA fiber (polyvinyl alcohol) or high tensile strength PE fiber (polyethylene) having a tensile strength of 1,500 MPa or more, and may be formed to a length of 15 mm or less.

FIG. 7 is a graph showing deformation of the reinforcing joint-free joint of FIG. 1 according to the temperature change of the reinforcing bar. Hereinafter, with reference to FIG. 7, the deformation of the reinforcing joint-free joint according to the temperature change of the reinforcing bar according to the embodiment of the present invention will be described.

FIG. 7 is a result of measuring the amount of deformation of the first reinforcing bar 120 according to a change in temperature over the past one year in an RC bridge having an extension of about 32M.

In general, the dynamic behavior acting on the coupling device 100 is mostly caused by a change in temperature, and the influence of the passing vehicle is insignificant. At this time, the ground and the alternation 10 can be deformed and absorbed with respect to the expansion and contraction amount of the joint device 100 due to the temperature change.

Referring to FIG. 7, the deformation of the first reinforcing bar 120 due to a change in temperature over the past one year is about ± 150 μm (stress value 30 N / mm 2).

Figs. 8 to 9 are flow charts showing a method of constructing a high-tensile joint-free joint to prevent water leakage in Fig. Hereinafter, a construction method of a high-tensile joint-free joint to prevent leakage of water according to an embodiment of the present invention will be described with reference to FIGS. 8 to 9. FIG.

The construction method of the high-tensile joint-free joint to prevent the leakage is largely divided into five steps. This is the installation step S110, the perforating step S120, the connecting step S130, the applying step S140, and the placing step S150.

The installing step S110 is a step of installing the backup agent 110 between the alternate 10 and the mold 20.

The perforating step S120 is a step of piercing the gap between the alternating mold 10 and the mold 20 to form the holes 14 and 24 and injecting the epoxy 160 into the holes 14 and 24.

The connecting step S130 may include filling the gap between the alternating mold 10 and the mold 20 in the longitudinal direction parallel to the mold 20 to form the first reinforcing bar 10 connecting the alternating mold 10 and the mold 20 120 are installed. That is, one end of the first reinforcing bar 120 bent at one end and the other end is buried in the hole 14 of the alternation 10 to connect the alternation 10 and the mold 20, And the other end is embedded in the hole (24) of the mold (20).

The application step S140 is a step of applying an adhesion promoter between the alternate 10 and the oil of the mold 20.

At this time, a primer may be applied to the adhesive reinforcement.

The primer is a primer that is applied to the bottom of the base in order to increase the corrosion resistance and adhesion when the paint (coating layer) is formed by repeatedly painting the paint (paint) repeatedly.

The adhesive reinforcing agent is divided into a first adhesive surface 12 and a first elastic surface 13 of the alternating portion 10 which are divided into inner and outer sides by embedding the first reinforcing bars 120 and formed on the same horizontal line, Can be applied only to the first adhesive surface (12) and the second adhesive surface (22) of the second adhesive surface (22) and the second elastic surface (23) of the mold (20).

At this time, the first expansion surface 13 and the second expansion surface 23 can be coated with lubricating oil or attached with vinyl to easily absorb the expansion and contraction according to the temperature change.

The pouring step S150 includes a first bottom slab 11 and a second bottom slab 21 formed on the upper portion of the alternating mold 10 and the mold 20 between the alternating mold 10 and the mold 20, And the cement mixture 130 is poured to a height equal to the height.

As described above, the cement composite material 130 is prepared by mixing 15 to 30 parts by weight of the compounding agent and 5 to 20 parts by weight of the high-tension short-staple fiber with respect to 100 parts by weight of the premixed ultra fast lightweight powder.

After that, the surface of the cement composite agent 130 is finely coated before the cement composite agent 130 is solidified, and the cement composite agent 130 can be finely treated and finished. After 3 hours at a temperature of 20 ° C, traffic can be released.

The method of the present invention for preventing leakage of water may further include a pretreatment step (S160) for removing and removing the existing joint and posttreatment prior to the installation step (S110) It is possible to easily construct the existing bridges.

The preprocessing step S160 includes a repairing step of cutting a repair part of the existing joint part using a concrete cutter or the like, a concrete chipping step of chipping the concrete part of the cut repair part with a breaker or a hand chipping machine, , And cutting and demolding of existing expansion joints.

At this time, the depth of the chipping in the concrete chipping step may be such that the alternation 10 is exposed.

The present invention relates to a high-strength joint-free joint and a method of constructing the joint-free joint according to the present invention, which can improve the running property of a vehicle by preventing joint leakage, And it is possible to solve the vibration and noise problem caused by the step or the like, so that the running ability can be improved.

Also, according to the present invention, there is provided a high-strength joint-free joint and a method of constructing the same using the cement composite material 130 and the reinforcing bars 120 and 140 excellent in crack control performance and tensile strain performance by multiple cracks Durability is excellent and it can be used semi-permanently, so it is possible to reduce costs for construction and maintenance and maintenance.

In addition, according to the present invention, there is provided a high-tensile joint-free joint device and a method of constructing the same, wherein a partition 150 installed between the shift 10 and the mold 20 divides the cement composite 130 into cracks The control performance can be further improved.

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 invention as defined by the appended claims. It is obvious that you can do it.

10: Alternation 11: First floor slab
12: first adhesive surface 13: first stretchable surface
20: mold 21: second bottom slab
22: second adhesive surface 23: second stretchable surface
100: High-tensile joint-free joint to prevent leakage
110: backup 120: first reinforcing bar
130: cement composite material 140: second reinforcing bar
150: partition 160: epoxy

Claims (11)

(10) in which a first bottom slab (11) is formed in an upper part, a mold (20) in which a second bottom slab (21) (20) to connect the alternating (10) and the mold (20), the apparatus comprising:
One end and the other end are bent to connect the alternating mold 10 and the mold 20 so that the bent end is embedded in the alternation 10 and the other end is folded into a plurality of 1 reinforcing bar (120);
An adhesion enhancer applied between the alternate (10) and the oil of the mold (20); And
The first and second bottom slabs 11 and 21 are flatly connected while the first reinforcing bars 120 are embedded between the alternating phase 10 and the oil of the mold 20, 15 to 30 parts by weight of a blend and 5 to 20 parts by weight of a high-strength short fiber are blended with 100 parts by weight of a cement admixture (130)
The adhesive enhancer may comprise,
The first adhesive surface 12 and the first stretchable surface 13 of the alternate 10 and the mold 20 are formed on the same horizontal line by being embedded inside the first reinforcing bars 120. [ Of the first adhesive surface (12) and the second adhesive surface (22) of the second adhesive surface (22) and the second elastic surface (23)
Wherein the lubricant is applied to the first expansion surface (13) and the second expansion surface (23), or vinyl is attached to the first expansion surface (13) and the second expansion surface (23).
The method according to claim 1,
Further comprising a backup agent (110) installed between the alternate (10) and the oil of the mold (20).
2. The pre-mix type rapidly shrinkable powder according to claim 1,
Silica fly, silica fume, fine powder of blast furnace slag, and calcium carbonate in an amount of 20 to 50% by weight, based on 100 parts by weight of a binder of a first speed compounded with at least one of ultra fast cement, ultra fast vulcanized calcium sulfoaluminate, jet cement, alpha type hemihydrate gypsum and ordinary Portland cement. 15 to 40% by weight of an inorganic binder mixed with at least one of at least one inorganic filler, 20 to 40% by weight of microfibrous silica, 1 to 5% by weight of a swelling agent mixed with at least one of a CSA-based swelling agent, a shrinkage- , 0.01 to 0.5% by weight of a functional additive mixed with at least one of a fluidizing agent, a powder resin, a thickener, an antifoaming agent and a retarding agent are mixed.
The method of claim 1, wherein the first reinforcing bars (120)
Characterized in that two reinforcing bars of the "a" shape are formed by being tightened to each other.
The method according to claim 1,
Further comprising a second reinforcing bar (140) disposed in a transverse direction orthogonal to the first reinforcing bars (120) and tightened with a plurality of first reinforcing bars (120) .
The method according to claim 1,
And a plurality of partitions 150 arranged in the lateral direction orthogonal to the first reinforcing bars 120 and tightened with the plurality of first reinforcing bars 120 and dividing the cementitious composite 130 into cubes. Tight joints that prevent water leakage.
An installation step S110 of installing a backup agent 110 between the alternate 10 and the mold 20;
Perforating step S120 of drilling the flux of the alternating mold 10 and the mold 20 to form the holes 14 and 24 and injecting the epoxy 160 into the holes 14 and 24;
A bent one end of the first reinforcing bar 120 bent at one end and the other end is embedded in the hole 14 of the alternation 10 to connect the alternation 10 and the mold 20, A connecting step (S130) of embedding in the hole (24) of the mold (20);
An application step (S140) of applying an adhesion promoter between the alternate (10) and the oil of the mold (20);
The cement mixture (10) and the mold (20) are heated to the same height as the first bottom slab (11) and the second bottom slab (21) 130);
Lt; / RTI >
The cement composite material (130) is prepared by mixing 15 to 30 parts by weight of the compounding agent and 5 to 20 parts by weight of high-tension short-staple fibers with respect to 100 parts by weight of the pre-
The adhesive enhancer may comprise,
The first adhesive surface 12 and the first stretchable surface 13 of the alternate 10 and the mold 20 are formed on the same horizontal line by being embedded inside the first reinforcing bars 120. [ Of the first adhesive surface (12) and the second adhesive surface (22) of the second adhesive surface (22) and the second elastic surface (23)
Wherein the lubricating oil is applied to the first expansion surface (13) and the second expansion surface (23) or the vinyl is attached to the first expansion surface (13) and the second expansion surface (23).
The pre-mix type quick-drop powder of claim 7,
Silica fly, silica fume, fine powder of blast furnace slag, and calcium carbonate in an amount of 20 to 50% by weight, based on 100 parts by weight of a binder of a first speed compounded with at least one of ultra fast cement, ultra fast vulcanized calcium sulfoaluminate, jet cement, alpha type hemihydrate gypsum and ordinary Portland cement. 15 to 40% by weight of an inorganic binder mixed with at least one of at least one inorganic filler, 20 to 40% by weight of microfibrous silica, 1 to 5% by weight of a swelling agent mixed with at least one of a CSA-based swelling agent, a shrinkage- , 0.01 to 0.5% by weight of a functional additive mixed with at least one of a plasticizer, a fluidizing agent, a powder resin, a thickener, an antifoaming agent and a retarder are mixed.
delete delete 8. The method of claim 7,
Further comprising a preprocessing step (S160) of removing and removing the existing joints and post-assemblies prior to the installing step (S110).

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