KR101568923B1 - Lightweight and high toughness concrete composition for absorbing shock and method of manufacturing the wing-wall by using the composition - Google Patents

Abstract

The present invention relates to a lightweight, high-tough concrete composition which is easy to absorb shock, and a method of making a wing wall using the same. More particularly, the present invention relates to a method for producing a wing wall using 15 to 25 parts by weight of a blend of polyvinyl alcohol fibers, One fiber selected from fibers, polypropylene fibers and steel fibers, or 1 to 3 parts by weight of short fibers obtained by mixing at least two fibers. The present invention relates to a lightweight, high-tensile concrete composition and a method of manufacturing a wing wall using the lightweight and high-strength concrete, The damage can be minimized.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight, high toughness concrete composition which is easy to absorb shock, and a method for manufacturing a wing wall using the same. BACKGROUND ART [0002]

More particularly, the present invention relates to a lightweight, high-tough concrete composition that is easy to absorb shock, and a method of making a wing wall using the same. More particularly, the present invention relates to a method of manufacturing a wing wall using lightweight, To a light weight tough concrete concrete composition which can minimize damage due to the damping effect of multiple cracks, and a method of making a wing wall using the same.

Recently, earthquakes such as the Sichuan earthquake in China, the earthquake in Haiti, the earthquake in Chile, and the northeastern earthquake in Japan have caused massive damage to people and property worldwide. As a result, interest in building seismic safety has increased.

However, the remaining 77,296 (63%) seismic reinforcement is required, while the other 45,905 (37%) of the 123,201 facilities in the entire seismic design facility have seismic performance. The most necessary facilities are listed in order of public buildings, school facilities and road facilities.

In Korea, seismic retrofitting works for public buildings and school facilities are actively being carried out. These seismic retrofitting works include steel brace construction, RC (reinforced concrete) shear wall expansion, wing wall extension, steel frame reinforcement, Damper reinforcement method and fiber attachment method are applied.

Among these methods, the RC shear wall expansion method and the wing wall extension method have been verified by many studies, and they are considered to be the most traditional and economical method, and they are actively applied at home and abroad. However, in the case of the RC shear wall extension method, since the opening is completely closed by the newly formed shear wall, the view and the mining can not be secured. Therefore, the use is limited to the outer wall provided with the opening such as the window, and the limitation is applicable only to the inner partition wall.

On the other hand, the wing wall extension method is a method of removing wing walls formed on one side or both sides of the existing pillar members and then expanding a wing wall made of reinforced concrete, etc., so that it is possible to secure visibility and mining even after reinforcement Do.

However, since the stiffness and strength of the wing wall extension method are too high as compared with the independent pillar element, the horizontal deformation capability is greatly decreased after the wing wall is extended, which has a problem of adversely affecting the toughness of the building.

In addition, since the rigidity is too high as compared with the independent column member, the stress is concentrated on the reinforced portion at the time of occurrence of the earthquake and is greatly damaged, thereby increasing the repair and reinforcement cost.

For example, Korean Utility Model Registration No. 20-0355875 (published on July 9, 2004) relates to the installation structure of a concrete prefabricated half-moon road drainage pipe wing installed at a location where a sewerage and a river are connected to each other. And a hump pipe is seated through a protective rubber ring on a U-shaped seating part of a lower half-moon sewer pipe. An upper wing wall is seated on the lower half-moon wing wall to support a Hume pipe, And the upper wing wall is interconnected by the F.A. clamping pin to construct a drainage pipe wing wall.

However, even in the case of the design, the stiffness of the wing wall is made higher than the stiffness of the existing sewer, so that the stress concentration in the reinforced portion can not be avoided when the earthquake occurs and the horizontal deformation capability of the existing sewer is greatly reduced .

Korean Registration Practice No. 20-0355875 (2004.07.09 Announcement)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a first object of the present invention to provide an anti-seismic reinforcing structure capable of enhancing the proof strength through seismic reinforcement through expansion of a wing wall but preventing an increase in rigidity, And a method for manufacturing a wing wall using the same.

A second object of the present invention is to provide a lightweight, high-tensile concrete composition which can be easily absorbed by shocks, which can prevent a significant increase in fixed load even after the seismic reinforcement due to the weight reduction of the wing walls by producing wings using lightweight, And to provide a method of manufacturing a wing wall using the same.

In order to accomplish the above object, the present invention provides a lightweight, high-tough concrete composition which is easy to absorb shock, which comprises 15 to 25 parts by weight of blended water, 100 to 200 parts by weight of polyvinyl alcohol fiber, Propylene fiber, and steel fiber, or 1 to 3 parts by weight of a short fiber having at least two fibers mixed therein.

At this time, the dry lightweight concrete is composed of 45 to 65% by weight of an inorganic binder mixed with at least two of cement, fly ash, blast furnace slag and silica fume, and at least two or more of natural lightweight aggregate, artificial lightweight aggregate and Cenosphere 1 to 10% by weight of the mixed lightweight aggregate, 24 to 45% by weight of an inorganic filler mixed with at least two of limestone powder (Lme Stone Powder), calcium carbonate, silica and talc, And 0.1 to 1.0% by weight of a functional additive mixed with at least two of the surfactants and the thickener may be mixed.

In addition, the lightweight, high-tough concrete composition which is easy to absorb shock is composed of a first reflective agent made of transparent microcrystalline ceramic powder having a particle size of 500 to 2000 탆 and a refractive index of 2.4 or more with respect to 100 parts by weight of dry lightweight concrete, A second reflective agent comprising a transparent glass bead powder having a particle size of 100 to 1000 탆 and a refractive index of 1.5 to 1.8 and a transparent microcrystalline cubic zirconia powder having a particle size of 100 to 1000 탆 and a refractive index of 2.1 to 2.2 , And 0.1 to 5 parts by weight of a mixture of a titanium dioxide photocatalyst and a mixture of the third reflective agent and the titanium dioxide photocatalyst.

In order to achieve the above object, the present invention provides a method of manufacturing a wing wall that is easy to absorb shock, comprising the steps of: forming a wing wall on one side or both sides of a column or a wall to improve seismic performance of a building, In the method, a manufacturing step of manufacturing a mold that can be joined with a column or a wall and a chemical anchor; Installing a stiffener in at least one direction of the vertical, horizontal, and diagonal roots within the mold; A mesh installation step of installing a continuous fiber mesh inside the mold; 15 to 25 parts by weight of the compounding amount per 100 parts by weight of the dry lightweight concrete and 1 to 3 parts by weight of staple fiber mixed with at least two fibers of polyvinyl alcohol fiber, polyethylene fiber, polypropylene fiber and steel fiber are mixed, A first mixing step of producing concrete; A pouring step of pouring the lightweight, high-tensile concrete into the mold; And a finishing step of providing a continuous fiber mesh on the lightweight, high-toughness concrete laid, and finishing the surface by compaction.

In addition, the method for manufacturing a wing wall that facilitates shock absorption may further include a curing step for curing the finished wing wall so as not to be adversely affected by external influences such as temperature, load, impact and breakage.

In addition, the method for manufacturing a wing wall that is easy to absorb shock comprises a first reflective agent made of transparent microcrystalline ceramic powder having a particle size of 500 to 2,000 mu m and having a refractive index of 2.4 or more with respect to 100 weight parts of the lightweight, A second reflective agent comprising a transparent glass bead powder having a particle size of 100 to 1000 탆 and a refractive index of 1.5 to 1.8 and a transparent microcrystalline cubic zirconia powder having a particle size of 100 to 1000 탆 and a refractive index of 2.1 to 2.2 And 0.1 to 5 parts by weight of a mixture of a titanium dioxide photocatalyst and a third mixing agent.

The present invention relates to a lightweight, high-tensile concrete composition and a method of manufacturing a wing wall using the lightweight and high-strength concrete, The damage can be minimized.

In addition, the lightweight, high-toughness concrete composition having a shock absorbing property according to the present invention and the method of manufacturing a wing wall using the same can increase the strength through seismic reinforcement through expansion of a wing wall but prevent an increase in rigidity, have.

In addition, since the lightweight and high-tough concrete composition and the method of manufacturing a wing wall using the same according to the present invention can not increase the rigidity due to the expansion of a wing wall, stress is not concentrated on the reinforcement portion during an earthquake, It is possible to minimize damage to existing buildings and facilities.

In addition, the lightweight, high-toughness concrete composition and the method of manufacturing a wing wall using the lightweight tough concrete according to the present invention can prevent the increase of the fixed load even after the seismic reinforcement by making the wing wall lightweight can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the seismic performance of a specimen reinforced with a wing wall using a lightweight, high-tensile concrete composition which is easy to absorb shock, according to an embodiment of the present invention,
Fig. 2 is a graph showing the seismic performance of a non-reinforced test body,
3 is a flowchart illustrating a method of manufacturing a wing wall that can easily absorb shock according to an embodiment of the present invention,
FIG. 4 is a flowchart showing another embodiment of a method for manufacturing a wing wall using a lightweight, high-tough concrete composition that is easy to absorb shock,
FIG. 5 is a flowchart showing still another embodiment of a method for manufacturing a wing wall using the lightweight, high-tough concrete composition of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a lightweight and high-tough concrete composition which is easy to absorb shock according to the present invention and a method for manufacturing a wing wall using the same will be described in detail with reference to the accompanying drawings.

FIG. 1 is a graph showing the seismic performance of a specimen reinforced with a wing wall using a lightweight and high-strength concrete composition which is easy to absorb shocks according to an embodiment of the present invention, and FIG. 2 is a graph showing seismic performance of an unsupported specimen.

1 and 2, it can be seen that a specimen reinforced with a wing wall using a lightweight, high-tensile concrete composition that is easy to absorb shock has a large shear force of more than ± 40 by a deformation angle and a displacement amount, have.

At this time, the shearing force refers to the load acting on any surface of the member and acting to be displaced in both opposite directions.

According to one embodiment of the present invention, a lightweight and high-tough concrete composition that is easy to absorb shock can easily absorb shock, and when manufactured from a wing wall, due to an effect of damping of multiple cracks occurring in a wing wall when an earthquake or an external impact occurs The damage can be minimized.

In this case, the lightweight, high-tensile concrete to be used can exhibit multiple crack characteristics in the flexure test with an elastic modulus of 15 GPa or less, a unit weight of 1,900 kg / m 2 or less, and a tensile strain of 0.5% or more. In this case, the multiple crack characteristics are expressed as innumerable microcracks with a crack width of 100 m or less in the strain hardening process, and if the multiple crack characteristics are not expressed, the crack width is greatly increased and the damage is increased. On the other hand, if the multiple crack characteristics are manifested, even if a large amount of elongation occurs due to a temperature change, it is possible to control the amount of elongation and expansion by microcracks of 100 mu m or less, .

The lightweight and high-tough concrete composition of the present invention is a lightweight, high-tough concrete composition which is composed of 15 to 25 parts by weight of blended water per 100 parts by weight of dry lightweight concrete and one fiber selected from polyvinyl alcohol fiber, polyethylene fiber, polypropylene fiber and steel fiber Or 1 to 3 parts by weight of short fibers having at least two fibers mixed therein.

At this time, it is most preferable that the staple fibers are used as staple fibers having a length of 15 mm or less, to secure the non-beam property.

In addition, when the staple fibers are mixed at less than 1 part by weight, it may become difficult to secure the target tensile strain (more than 0.5%) and the multiple cracking characteristics. When the staple fibers are mixed at more than 3 parts by weight, This can be difficult.

The dry, lightweight concrete comprises 45 to 65% by weight of an inorganic binder mixed with at least two of cement, fly ash, blast furnace slag and silica fume, and at least two of natural lightweight aggregate, artificial lightweight aggregate and Cenosphere 1 to 10% by weight of the lightweight aggregate, 24 to 45% by weight of an inorganic filler mixed with at least two of limestone fine powder (Lme Stone Powder), calcium carbonate, silica and talc, And 0.1 to 1.0 wt% of a functional additive mixed with at least two of the above thickeners may be mixed.

At this time, when the inorganic binder is mixed at less than 45 wt%, it becomes difficult to secure the target strength. When the inorganic binder is mixed at more than 65 wt%, the shrinkage of shrinkage or self-shrinkage greatly increases, , And the economy may be deteriorated.

In addition, when the lightweight aggregate is mixed at less than 1 wt%, the target unit weight (1,900 kg / m 2 or less) and the elastic modulus (15 GPa or less) can not be reached. There is a concern, and it may be difficult to secure long-term durability.

When the inorganic filler is mixed at less than 24% by weight, it is difficult to secure economical efficiency. When the inorganic filler is mixed at more than 45% by weight, workability at the time of pouring work may be difficult.

The lightweight, high-tough concrete composition which is easy to absorb shock is composed of a first reflective agent having a particle size of 500 to 2000 mu m and a transparent microcrystalline ceramic powder having a refractive index of 2.4 or more, A second reflective agent made of a transparent glass bead powder having a particle size of 탆 and a refractive index of 1.5 to 1.8 and a transparent microcrystalline cubic zirconia powder having a particle size of 100 to 1000 탆 and a refractive index of 2.1 to 2.2 3 reflective agent, and titanium dioxide photocatalyst may be further mixed with 0.1 to 5 parts by weight of the mixture.

In the present invention, the first reflective agent, the second reflective agent and the third reflective agent having different refractive indexes are mixed to increase the retroreflectivity even when the refractive index is higher as the refractive index is higher. Respectively.

In addition, the photocatalyst is a substance which can accelerate or catalyze a chemical reaction by light when receiving light energy such as sunlight, and surrounds the surfaces of the first, second, and third reflective agents Even if contaminants such as fine dust are adhered, the contaminants adhered through the action of the photocatalyst are easily decomposed and water droplets such as rainwater are washed together with the contaminants, thereby maintaining the retroreflectivity and suppressing the occurrence of deterioration have.

Such a photocatalyst is made of titanium dioxide which reacts with ultraviolet rays of sunlight and is excellent in decomposition performance of contaminants such as exhaust gas. The titanium dioxide is excellent in the ability to oxidize and decompose harmful substances and is used for environment purification (to remove environmental pollution and to prevent bacteria, deodorization, etc.) or to provide superhydrophilic function (to make a thin film It is applied to various products such as glass, tile, cleaner, air purifier, refrigerator, road pavement, curtain wallpaper and artificial plants with self-cleaning effect.

The method of mixing the photocatalyst may include a spraying method in which titanium dioxide powder is melted and injected, a CVD (chemical coating method) in which titanium dioxide is precipitated by chemical reaction, a sputter deposition method in which titanium dioxide is evaporated and deposited, Vacuum deposition, or the like. In the present invention, fine titanium dioxide powder is uniformly dispersed in the first, second, and third reflective agents, and is applied through a spray, a flowcotter, or the like So that a uniform and smooth reflection layer is formed. At this time, the titanium dioxide photocatalyst preferably has a particle size of 0.01 to 3.0 mu m.

When the particle size of the photocatalyst is smaller than the above range, the amount of the photocatalyst surrounding the first, second, and third reflective agents is reduced, so that the decomposition efficiency of the contaminants is lowered. When the particle size of the photocatalyst is larger than that, The transparency of the reflective agent, the second reflective agent and the third reflective agent may be lowered.

Table 1 below shows the formulation of the lightweight, high-tough concrete composition which is easy to absorb shock.

Classification Example 1 Example 2 Comparative Example Remarks Dry lightweight
concrete Inorganic binder cement 30 30 30 Type 1 Portland cement Fly ash 10 15 10 Blast furnace slag 10 - 5 6,000㎠ / g Silica fume - 3 4 sub Total 50 48 49 Lightweight aggregate Artificial lightweight aggregate 5 2.7 - 1.2 mm or less Senosphere 1.7 3 0.8 150 μm or less sub Total 6.7 5.7 0.8 Inorganic filler Limestone powder 10 10 - 3,000 cm2 / g Calcium carbonate 23 26 10 4,000 cm2 / g Silica sand 10 10 40 Special 7 sub Total 43 46 50 Functional
additive Fluidizing agent 0.2 0.2 0.1 Polycarboxylic acid series Air entrainment agent 0.09 0.09 0.09 AE Thickener 0.01 0.01 0.01 HPMC sub Total 0.3 0.3 0.2 sub Total 100 100 100 Number of ingredients 22 22 22 Staple fiber PVA fiber 1.8 1.0 0.5 High tension PE fiber - 0.5 - High tension PP fiber - - 0.3 sub Total 1.8 1.5 0.8

In Example 1, inorganic fillers (cement, fly ash and blast furnace slag), lightweight aggregate (artificial lightweight aggregate and senosphere), inorganic fillers (limestone powder, calcium carbonate and silica) and functional additives (Cement, fly ash, and silica fume), lightweight aggregate (artificial lightweight aggregate and senosphere) in Example 2, and a mixture of water-soluble lightweight concrete and water- (PVA fibers and PE fibers) were blended with a dry lightweight concrete mixed with inorganic fillers (limestone fine powder, calcium carbonate and silica) and functional additives (fluidizing agent, air entraining agent and thickener).

In Comparative Examples for comparison with Examples 1 and 2, inorganic binder (cement, fly ash, blast furnace slag and silica fume), lightweight aggregate (senosphere), inorganic filler (calcium carbonate and silica) , Air entraining agent and thickener), blended water and short fibers (PVA fiber and PP fiber) were blended.

The results of the experiment according to the above formulation are shown in Table 2 below.

Classification Example 1 Example 2 Comparative Example Test Methods Table flow (mm) 187 186 191 KS F 2476 Unit weight (kg / ㎡) 1,830 1,851 2,053 KS F 2462 Compressive strength (MPa) 33.9 35.1 45.5 KS F 2405 Elastic modulus (GPa) 12.4 12.7 18.9 KS F 2438 Tensile strain (%) 2.1 2.2 0.4 JSCE-Direct tensile test method Tensile Strength (MPa) 4.7 4.6 3.9 JSCE-Direct tensile test method Flexural strength (MPa) 22.4 21.7 10.3 KS F 2408 Multiple bending tests
Presence or absence of crack ○ ○ × JSCE Overall assessment Very good Very good Bad

As described above, Examples 1 and 2 according to the lightweight and high toughness concrete composition of the present invention which is easy to absorb shock showed small dimensions in terms of compressive strength and elastic modulus as compared with the comparative example, but excellent tensile strain, tensile strength and bending strength , And multiple cracks were also observed at the flexure test.

Further, in the case of the comparative example, the stiffness and the proof strength are excessively higher than necessary, so that the tensile strain, the tensile strength and the bending strength are very low, which may adversely affect the toughness of the building.

The present invention relates to a lightweight, high-tensile concrete composition and a method of manufacturing a wing wall using the lightweight and high-strength concrete, The damage can be minimized.

In addition, the lightweight, high-toughness concrete composition having a shock absorbing property according to the present invention and the method of manufacturing a wing wall using the same can increase the strength through seismic reinforcement through expansion of a wing wall but prevent an increase in rigidity, have.

In addition, since the lightweight and high-tough concrete composition and the method of manufacturing a wing wall using the same according to the present invention can not increase the rigidity due to the expansion of a wing wall, stress is not concentrated on the reinforcement portion during an earthquake, It is possible to minimize damage to existing buildings and facilities.

In addition, the lightweight, high-toughness concrete composition and the method of manufacturing a wing wall using the lightweight tough concrete according to the present invention can prevent the increase of the fixed load even after the seismic reinforcement by making the wing wall lightweight can do.

FIG. 3 is a flow chart showing a method for manufacturing a wing wall which is easy to absorb shock according to an embodiment of the present invention, FIG. 4 is a flowchart showing another embodiment of a method for manufacturing a wing wall, 3 is a flowchart showing still another embodiment of a method for manufacturing a wing wall that is easy to absorb shock.

In order to improve the seismic performance of the building, the wing wall which is easy to absorb shock is installed on one side or both sides of the column or the wall, and the method of manufacturing the wing wall which is easy to absorb the shock is divided into six stages. This is the manufacturing step S110, the stiffener mounting step S120, the mesh installing step S130, the first mixing step S140, the placing step S150, and the finishing step S160.

The manufacturing step (S110) is a step of manufacturing a mold that can be joined to a column or a wall by a chemical anchor.

At this time, the thickness T of the form may be about 2 to 10 mm.

If the thickness of the form is less than 2 mm, deformation may easily occur at the time of weld joining and it may become difficult to secure a proof against the stress transmitted to the wing wall from the structure. In addition, if the thickness of the form is more than 10 mm, the strength of the steel plate is too high, and there is a fear that the impact absorbing ability due to the damage of the wing wall is lowered.

In addition, the mold may be formed so as to secure a clearance width of at least 30 mm on both sides of the thickness of the lightweight high-toughness concrete to be laid later, and an anchor hole for inserting the chemical anchor into the clearance width.

The step of installing the reinforcing material (S120) is a step of installing stiffeners in at least one direction of the vertical, horizontal, and diagonal roots inside the mold.

At this time, the reinforcing material may be any one selected from deformed reinforcing bars, circular reinforcing bars, FRP rods and steel reinforcing bars, and it is most preferable to use deformed reinforcing bars.

Alternatively, the reinforcing material may be welded to be integrated with the mold, or the stud bolt and the reinforcing material may be tightened after welding the stud bolt to the mold.

The reinforcing member is a structure for uniformly transferring the external force transmitted from the existing structure to the mold to the lightweight, high-strength concrete described later.

The mesh installation step S130 is a step of installing a continuous fiber mesh in the mold.

The continuous fiber mesh is a structure for suppressing the surface peeling of the wing wall, the abrasion, or the abrupt shear crack when an earthquake occurs.

As the continuous fiber mesh, a carbon fiber mesh, an aramid fiber mesh, or a glass fiber mesh can be used. There is no limitation on the mesh size, and since the surface is exposed, it is most preferable to use a carbon fiber mesh.

In the first mixing step (S140), 15 to 25 parts by weight of the compounding amount per 100 parts by weight of the dry lightweight concrete, one fiber selected from polyvinyl alcohol fiber, polyethylene fiber, polypropylene fiber and steel fiber, And 1 to 3 parts by weight of mixed short fibers is mixed to produce a lightweight tough concrete.

Such lightweight tough concrete may be the same as the composition described above.

The pouring step S150 is a step of pouring the lightweight, high-tensile concrete into the mold.

In the finishing step (S160), a continuous fiber mesh is installed on the lightweight, high-toughness concrete laid, and the surface is finished by compaction.

It is preferable that the surface of the continuous fiber mesh is plastered while pressing the surface of the lightweight, high-strength concrete so that the continuous fiber mesh is in close contact with the surface of the lightweight, high-tough concrete.

At this time, the method for manufacturing a wing wall that can easily absorb shock may further include a curing step (S170) for curing the closed wings so as not to be adversely influenced by external influences such as temperature, load, impact and breakage.

At this time, the curing step (S170) is also referred to as reclamation. After 28 days of curing, the concrete reaches almost the final compressive strength. Until this time, the chemical action of the cement continues until the daylight, The concrete should be hydrated and covered with mackerel or pavement. In summer, it should be damped for 7 days or more, usually 5 days or more to maintain wetting. In cold weather period, . In addition, it should be protected from impact because it is likely to be damaged for 3 days after installation.

In addition, the method for fabricating a wing wall that facilitates shock absorption is characterized in that, after the first mixing step (S140), a transparent microcrystalline ceramic having a particle size of 500 to 2000 mu m and a refractive index of 2.4 or more with respect to 100 parts by weight of the light- And a second reflective agent made of a transparent glass bead powder having a particle size of 100 to 1000 탆 and a refractive index of 1.5 to 1.8 and a second reflective agent having a particle size of 100 to 1000 탆 and having a particle size of 2.1 to 2.2 (S141) in which 0.1 to 5 parts by weight of a mixture of a third reflective agent composed of transparent microcrystalline cubic zirconia powder having a refractive index and a titanium dioxide photocatalyst are further mixed.

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.

Claims (6)

1 to 3 parts by weight of a single fiber selected from a polyvinyl alcohol fiber, a polyethylene fiber, a polypropylene fiber and a steel fiber or a mixture of two or more fibers is mixed with 100 parts by weight of dry lightweight concrete, Mixed,
A first reflective agent made of transparent microcrystalline ceramic powder having a particle size of 500 to 2000 占 퐉 and a refractive index of 2.4 or more with respect to 100 parts by weight of dry and lightweight concrete, and a second reflective agent having a particle size of 100 to 1000 占 퐉 and having a refractive index of 1.5 to 1.8 And a third reflective agent made of transparent microcrystalline cubic zirconia powder having a particle size of 100 to 1000 탆 and a refractive index of 2.1 to 2.2 and a mixture of a titanium dioxide photocatalyst And 0.1 to 5 parts by weight of the composition is further mixed.
The dry lightweight concrete according to claim 1,
45 to 65% by weight of an inorganic binder mixed with at least two of cement, fly ash, blast furnace slag and silica fume, and lightweight aggregate 1 to 10 mixed with at least two of natural lightweight aggregate, artificial lightweight aggregate and Cenosphere 24 to 45% by weight of an inorganic filler in which at least two of Lme Stone Powder, calcium carbonate, silica and talc are mixed and at least two of a fluidizing agent, an air-entraining agent and a thickener, 0.1 to 1.0% by weight of a functional additive mixed with the above-mentioned functional additive.
delete A method of manufacturing a wing wall which is installed on one side or both sides of a column or a wall to improve seismic performance of a building made of a lightweight and high-tough concrete,
A manufacturing step S110 of manufacturing a mold that can be joined to a column or a wall and a chemical anchor;
A step (S120) of installing a stiffener in at least one direction of the vertical, horizontal, and diagonal roots inside the mold;
A mesh installation step (S130) of installing a continuous fiber mesh inside the mold;
1 to 3 parts by weight of a single fiber selected from a polyvinyl alcohol fiber, a polyethylene fiber, a polypropylene fiber and a steel fiber or a mixture of two or more fibers is mixed with 100 parts by weight of dry lightweight concrete, A first mixing step (S140) of producing mixed lightweight tough concrete;
Pouring the lightweight, high-tensile concrete into the mold; And
A finishing step (S160) of installing a continuous fiber mesh on an upper portion of the lightweight, high-toughness concrete laid, finishing the surface by compaction;
Lt; / RTI >
A first reflective agent made of transparent microcrystalline ceramic powder having a particle size of 500 to 2000 μm and a refractive index of 2.4 or more with respect to 100 parts by weight of the lightweight and high-tough concrete, and a second reflective agent having a particle size of 100 to 1,000 μm, A second reflecting agent made of a transparent glass bead powder having a refractive index and a third reflecting agent made of a transparent microcrystalline cubic zirconia powder having a particle size of 100 to 1000 mu m and a refractive index of 2.1 to 2.2 and a titanium dioxide photocatalyst Further comprising a second mixing step (S141) of further mixing 0.1 to 5 parts by weight of the resulting mixture.
5. The method of claim 4,
Further comprising a curing step (S170) of curing the finished wings so as not to be adversely affected by external influences such as temperature, load, impact, breakage, etc. (S170).
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