KR102241540B1 - Floor finishing construction method using steel fiber reinforced concrete and dry-shake - Google Patents

Abstract

Disclosed is a floor finishing construction method using steel fiber reinforced concrete and dry shake, capable of constructing a floor having high strength and excellent smoothness by applying a dry shake on the steel fiber reinforced concrete using concrete containing steel fibers during floor finishing construction. According to an embodiment of the present invention, the floor finishing construction method using steel fiber reinforced concrete and dry shake may comprise the steps of: (a) cleaning a bottom surface, then installing a welded wire mesh; (b) mixing steel fiber with concrete and then pouring the mixed steel fiber concrete on the bottom surface; (c) cleaning the surface of the poured steel fiber mixed concrete; and (d) pouring a dry shake on the cleaned concrete surface.

Description

Floor finishing construction method using steel fiber reinforced concrete and dry-shake}

The present invention relates to a floor finishing construction method using steel fiber reinforced concrete and dry shake, and more particularly, to have high strength by applying dry shake on the steel fiber reinforced concrete using concrete containing steel fiber during floor finishing construction. The present invention relates to a floor finishing construction method using steel fiber reinforced concrete and dry shake that can construct a floor with excellent smoothness while still being smooth.

Concrete is a hydration reaction in which cement reacts with water and hardens, and the aggregate is crushed by enclosing the aggregate with a cement paste (a cement made from cement with water). In the Roman era, it was said to have been made using volcanic ash and limestone. In general, after Portland cement was invented in the early 19th century, it was the first time that concrete reinforced with wire mesh was made in France in 1867. After that, the development of reinforced concrete continued mainly in Germany, and in recent years it has become the center of civil engineering works such as dams, road pavements, bridges, and structural materials for buildings. However, since these concretes are particularly weak in tensile strength, in general, when forming structures such as concrete structures or refractory materials, in order to improve the mechanical and physical properties of these structures, concrete and refractory composites, which are materials, are mixed with reinforcing bars to form. It is common. Therefore, in the structure after the molding is completed, mechanical properties and physical properties such as tensile force, compression force, shear force, impact force, and toughness are improved due to the reinforcement described above. It is common to use reinforcing bars bonded to each other in the manufacture of concrete structures that are large in size and subject to heavy loads such as buildings.

In order to compensate for the structural defects of such general concrete, recently reinforced concrete made by mixing steel fibers with raw materials (aggregate, cement) has been developed.

These steel fibers are buried and distributed in the concrete section to increase the binding force between the concrete particles, and at the same time give a uniform tensile force to the entire concrete section to absorb and disperse the external stress applied. It is in the trend of being widely used as a reinforcement to improve shear strength, flexural toughness, and impact resistance.

However, in the case of concrete using the steel fiber, corrosion may occur continuously due to water infiltrated into the concrete, and when used as a finishing material, the steel fiber is exposed to the outside, which is bad in terms of aesthetics, and at the same time, the strength difference between concrete and steel fiber during grinding work. Due to this, it has a disadvantage that it is difficult to form a flat bottom surface. Therefore, there is a need for a floor finishing construction method capable of forming a flat floor surface while having high strength by using the steel fiber reinforced concrete.

(0001) Korean Patent Registration No. 10-0469961 (0002) Korean Patent Registration No. 10-0240863

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a concrete capable of having a high tensile strength by mixing steel fibers during concrete mixing.

In addition, by using a welded wire mesh as a reinforcing material when pouring the steel fiber blended concrete, it is to provide a concrete finishing construction method capable of further improving strength while preventing the flow of concrete.

In addition, by performing a dry shake finish on the steel fiber blended concrete, it is to provide a concrete finishing construction method capable of preventing oxidation of steel fibers by preventing the steel fibers from being exposed to the outside during floor construction.

In addition, by performing a dry shake finish on the steel fiber blended concrete, it is to provide a concrete finishing construction method capable of constructing a floor surface of various colors while allowing a high level of flatness during floor construction.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A floor finishing construction method using steel fiber reinforced concrete and dry shake according to an embodiment of the present invention for solving the above problem includes the steps of: (a) arranging the floor and then installing a welded wire mesh; (b) mixing steel fibers with concrete and then pouring them on the floor; (c) arranging the surface of the poured steel fiber mixed concrete; And (d) pouring a dry shake on the cleaned concrete surface.

In one embodiment, the step (a) includes the steps of flattening the bottom surface to a constant height; A compaction step of compacting the flattened floor surface using a roller; Curing the bottom surface by applying a surface solidifying agent after the compaction step is completed; And after the surface hardening agent is cured, installing a welded wire mesh; The bottom surface is composed of sand, soil, gravel, crushed stone, or a mixture thereof, the surface solidifying agent is a silicate-based surface solidifying agent, and the welded wire mesh is a deformed reinforcing bar having a diameter of 6 to 10 mm at intervals of 10 to 20 cm. It is a welded wire mesh arranged in a grid shape and then welded at intersections, and the welded wire mesh is arranged in one to two layers on the bottom surface, and in step (b), a wire having a diameter of 0.1 to 3 mm is pressed to obtain a cross section. Compressing to have an oval or similar shape; Fixing the other end of the crimped wire and rotating one end to form a thread shape; Cutting the wire processed into the thread shape to be 50 to 80 mm, and then bending the wire to have a certain shape to produce steel fibers; Preparing a concrete mixture by mixing 10 to 70 parts by weight of water, 100 to 150 parts by weight of aggregate, 50 to 150 parts by weight of sand, and 5 to 20 parts by weight of the bent steel fiber based on 100 parts by weight of cement; And pouring the concrete mixture on the floor on which the welded wire mesh is installed, wherein the steel fibers form a network structure with the welded wire mesh inside the concrete, and sacrificial electrodes 1 to 10 on the side of the welded wire mesh Is connected, and the sacrificial electrode is zinc or magnesium electrically connected to the welded wire mesh, and the step (c) includes FM2 or more based on the smoothness management standard UK The Concrete Society's TR34 (4th Edition). Flattening to be; The step (d) includes laying a dry shake containing cement, pigment, silica sand, aggregate, admixture, and a binder to a predetermined thickness on the cleaned concrete surface and finishing by screed polishing with a vibrating beam; And applying and curing a curing agent on the installed dry shake, wherein the dry shake includes 20 to 50 parts by weight of pigment, 10 to 20 parts by weight of silica sand, 50 to 80 parts by weight of aggregate, relative to 100 parts by weight of cement. , Including 20 to 50 parts by weight of admixture and 20 to 50 parts by weight of a binder, wherein the binder is a material that forms a polymer by reacting with the curing agent, and provides a floor finishing construction method using steel fiber reinforced concrete and dry shake. do.

According to an embodiment of the present invention, a concrete floor capable of having a high tensile force can be formed by mixing steel fibers during concrete mixing.

In addition, a circular steel fiber can be compressed to maximize the surface area when producing the steel fiber, and then the contact area with concrete can be maximized by twisting the steel fiber, thereby providing a concrete finishing method that can have a higher tensile strength. have.

In addition, steel fibers are used to form a network structure, and the network structure is brought into contact with the welded wire mesh, and a sacrificial electrode is installed at one end of the welded wire mesh, thereby minimizing the reduction in strength due to oxidation of the steel fiber and the welded wire mesh. Construction method can be provided.

In addition, it is possible to provide a concrete finishing method capable of forming a high-strength floor with high flatness by performing finishing and flattening using dry shake after concrete finishing using steel fiber.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 schematically shows a floor finishing construction method using steel fiber reinforced concrete and dry shake according to an embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described herein may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

Terms including ordinal numbers such as first and second may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms are used only for the purpose of distinguishing one component from other components.

In the present specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance. When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Meanwhile, a "module" or "unit" for a component used in the present specification performs at least one function or operation. In addition, the "module" or "unit" may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of "modules" or a plurality of "units" excluding "module" or "unit" to be performed in specific hardware or performed by at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

1 schematically shows the floor finishing construction method of the present invention.

The present invention comprises the steps of (a) arranging the bottom surface and then installing a welded wire mesh; (b) mixing steel fibers with concrete and then pouring them on the floor; (c) arranging the surface of the poured steel fiber mixed concrete; And (d) it relates to a floor finishing construction method using steel fiber reinforced concrete and dry shake comprising the step of pouring a dry shake on the cleaned concrete surface.

The step (a) is a step of arranging the bottom surface and then installing a welded wire mesh. It is a step of arranging the floor so that steel fiber reinforced concrete can be poured and installing a welded wire mesh necessary for reinforcement.

The floor tidying step may include flattening the floor to a constant height; A compaction step of compacting the flattened floor surface using a roller; Curing the bottom surface by applying a surface solidifying agent after the compaction step is completed; And after the surface hardening agent is cured, installing a welded wire mesh.

The flattening step is a step of excavating or covering the floor to a certain height and then flattening it to be parallel.The level of the ground is leveled and a flat floor is formed so that the bottom surface by the subsequent construction is parallel to the ground and has a high level of flatness. This is the step to make it possible to have. This flattening step is preferably flattened using a machine, but if a machine cannot be used, flattening can also be performed using manpower.

At this time, the floor surface may be a floor made of general sand or soil, but may be a floor in which gravel or crushed stone is supplied at a predetermined height on the sand or floor surface, and may be a mixture of the sand, soil, gravel, and crushed stone. have. In particular, when the surface is to be solidified by the use of a solidifying agent to be described later, sand or soil is used for the surface, but gravel or crushed stone is placed at the bottom of the sand or soil, so that water that has not penetrated by the solidification layer is It is desirable to allow drainage between the pores of gravel or crushed stone.

The compaction step is a step of increasing the density of the floor surface by compacting the flattened floor surface, thereby increasing the density of the floor surface to prevent subsidence of the floor surface so that the constructed concrete finish can be used for a long time. To this end, the compaction step may be performed by using a roller, and it is preferable to compact the floor so as to have a flat and high density by using vibration as well as the weight of the roller.

After compaction is completed as described above, a surface hardening agent may be applied to shape the strength of the floor. The surface solidifying agent is generally a solidifying agent that improves the strength of the soil surface so that the subsequent pouring process can be smoothly performed. The surface hardening agent used at this time may be used without limitation as long as it can penetrate into the pores of the compacted floor.

As described above, after the surface solidifying agent is applied to the bottom surface, a welded wire mesh may be disposed on the top of the bottom surface. Conventional steel fiber reinforced concrete often does not perform reinforcement using reinforcement, that is, reinforcement due to the use of steel fiber.In this case, labor cost and air due to reinforcement may be reduced, but the tensile strength of the reinforcement is stronger than that of the steel fiber. Compared to this, it had a disadvantage that the strength could be lowered. In addition, when the reinforcement is performed with the reinforcement, the load is distributed over the entire floor surface to minimize ground subsidence.However, in the case of concrete using steel fiber, when the load is concentrated in a certain part, the part where the load occurs may be subsided. . Therefore, in the case of the present invention, by applying a welded wire net on the floor surface, it is possible to further increase the strength of the steel fiber-reinforced concrete while preventing subsidence due to a load.

At this time, the welded wire mesh is preferably a deformed reinforcing bar having a diameter of 6 to 10 mm. When rebar with a diameter of less than 6mm is used, it is difficult to expect the reinforcement effect by rebar, and reinforcement with a diameter of more than 10mm is difficult to handle and the construction period may increase.

In addition, it is preferable to use a deformed reinforcing bar as the reinforcing bar. Reinforcing bars are generally produced with circular reinforcing bars having a uniform cross-section and deformed reinforcing bars having maggi and ribs on the surface. In the case of the present invention, it is preferable to use deformed reinforcing bars having high adhesion strength by increasing the surface area in contact with the concrete.

In addition, the wire mesh may be formed by arranging the deformed reinforcing bars in a grid pattern at intervals of 10 to 20 cm, and then welding the cross points. When the deformed reinforcing bars are arranged at intervals of less than 10 cm, it may be difficult to pour steel fiber reinforced concrete to be described later, and when it exceeds 20 cm, the spacing between the reinforcing bars may be too wide to reduce the effect of the welded wire mesh. In addition, the welded wire mesh may be arranged in one or two layers on the bottom surface. If it is arranged in more than two layers, the thickness of the floor becomes too thick, and it may be difficult to pour steel fiber reinforced concrete.

The step (b) is a step of mixing steel fiber with concrete and then pouring it on the floor surface, and pouring concrete mixed with steel fiber on the floor surface.

To this end, the step (b) is a step of pressing a wire having a diameter of 0.1 to 3 mm to have an elliptical cross section or a similar shape; Fixing the other end of the crimped wire and rotating one end to form a thread shape; Cutting the wire processed into the thread shape to be 50 to 80 mm, and then bending the wire to have a certain shape to produce steel fibers; Preparing a concrete mixture by mixing 50 to 150 parts by weight of water, 50 to 150 parts by weight of sand, and 5 to 20 parts by weight of the bent steel fiber based on 100 parts by weight of cement; And pouring the concrete mixture onto the floor on which the welded wire mesh is installed.

The steel fiber is included as a reinforcing material of the concrete and may serve to increase the tensile strength of the concrete in place of the existing reinforcement. In this case, the steel fiber may be used by cutting a wire having a specific shape to a predetermined length, unlike conventional reinforcing bars, and then randomly dispersing it in the concrete.

The steel fiber may be used by simply cutting the wire into a predetermined length, but it is preferable to use a steel fiber having a specific shape in order to have high tensile strength inside the concrete.

To this end, the steel fiber is compressed to have an elliptical cross section or a similar shape by pressing a wire having a diameter of 0.1 to 3 mm; Fixing the other end of the crimped wire and rotating one end to form a thread shape; It can be manufactured by cutting the wire processed into the thread shape to be 50-80mm, and then bending it to have a certain shape.

The pressing step is a step of pressing the steel fiber so that the cross section has a circular shape to an elliptical shape or a similar shape. At this time, the steel fiber may be a wire having a thickness of 0.1 ~ 3mm. When the steel fiber has a thickness of less than 0.1 mm, it is difficult to expect a reinforcing effect by the steel fiber, and when the steel fiber has a thickness of more than 3 mm, it is difficult to mix with the concrete and bubbles may occur or defects may occur.

The steel fibers compressed as described above may be twisted to have a certain shape. That is, by fixing the other end of the crimped wire and rotating one end to process it into a thread shape, the contact surface with the concrete can be maximized.

The steel fibers twisted as described above may be cut to have a certain length. At this time, the steel fiber may be cut to a length of 50 ~ 80mm. When the steel fiber has a length of less than 50 mm, it is difficult to expect a reinforcing effect by the steel fiber, and when it has a length exceeding 80 mm, it is difficult to mix with concrete and a defect may occur.

The cut fiber may be bent to have a certain shape. At this time, the steel fiber is then bent upward at both ends. Part of both ends bent upward may be bent downward again to have “Ω”, and may be manufactured to have a wave pattern by repeating upward and downward bending. Through this, when the concrete is subjected to stress, the steel fiber can absorb the stress while the bent portion is unfolded, and accordingly, it is possible to manufacture concrete having a high tensile strength.

The steel fibers prepared as described above may be mixed with concrete to be poured. At this time, the concrete may include 10 to 70 parts by weight of water, 100 to 150 parts by weight of aggregate, and 50 to 150 parts by weight of sand relative to 100 parts by weight of cement. Appropriate concrete may be blended within the above range, but outside the above range, the strength of the concrete may decrease. After preparing concrete as described above, 5 to 20 parts by weight of steel fibers were mixed with respect to 100 parts by weight of cement. The mixing was performed using a mixer, and in order to prevent aggregation and settling of the steel fibers, the mixing is preferably performed in units of 10 to 300 kg. When the steel fiber is included in less than 5 parts by weight, it may be difficult to construct an electrical network to be described later, and the strength of the steel fiber-mixed concrete may decrease, and when it is included in more than 20 parts by weight, it may be difficult to pour due to the use of excessive steel fibers.

The steel fibers mixed as described above may constitute an electrical network by pouring. The steel fiber is composed of a conductor, and when a predetermined amount of steel fibers are mixed, a connection between the steel fibers occurs, so that the steel fiber and the welded wire network may have a network structure that is electrically connected. By using this, by connecting 1 to 10 sacrificial electrodes to one side of the welded wire mesh, corrosion due to oxidation of the welded wire mesh and steel fibers may be prevented.

Looking at this in detail, reinforcing materials such as reinforcing bars or steel fibers included in concrete are made of iron among metals, so when they come into contact with moisture, their strength may decrease due to oxidation. In order to prevent this, the surface of the steel fiber or reinforcing bar is coated with rust prevention, but due to the nature of concrete having strong basicity, oxidation may occur quickly when it comes into contact with moisture. In order to prevent this, in the case of the present invention, a lot of steel fibers are input compared to the existing steel fiber reinforced concrete, and the input steel fibers are connected to each other to form an electrical network structure. In addition, since the concrete containing the steel fibers is poured on the welded wire mesh, the welded wire mesh may also form a network with the steel fibers. That is, the welded wire mesh and the steel fibers are electrically connected to each other by constituting one or a few net works, and by installing a sacrificial electrode on one side of the network, oxidation of the steel fibers and the welded wire mesh can be prevented. The sacrificial electrode used at this time may be made of zinc or magnesium, which has a higher electron affinity than iron used for the welded wire mesh and the steel fiber, and the zinc or magnesium is electrically connected to the welded wire mesh and the steel fiber and is generated upon oxidation. It is possible to prevent oxidation of the reinforcing bars and steel fibers by being oxidized instead of using electrons.

The step (b) is a step of arranging the surface of the poured steel fiber-mixed concrete, making the surface of the poured concrete parallel to the ground and flattening it so that there is no curvature.

To this end, the step (c) includes the steps of flattening the poured concrete surface to be FM2 or more based on the UK The Concrete Society’s TR34 (4th Edition), based on the smoothness management standard; After curing the concrete for 8 to 10 hours based on 20 to 25°C, it is preferable to perform flattening as much as possible while treating the dry shake surface.

At this time, it is preferable to flatten the concrete so that it is FM2 or higher based on the UK The Concrete Society's TR34 (4th Edition), the smoothness management standard. In the case of the UK The Concrete Society's TR34 (4th Edition), smoothness is managed through flatness and levelness, and the evaluation method is as follows.

Flatness-Attribute F: Change in elevation difference between two consecutive elevation differences measured over 300mm each

Levelness-Property E: The difference in elevation between two points 3m apart, measured on a 3mX3m grid

When F and E measured as described above are within a certain value, the FM rating is evaluated. In the case of FM2, E is 8.0-10mm, and F is 2.2-2.4mm.

In the case of the planarization (primary planarization), it may be constructed using a machine, and preferably, planarization may be performed using a floor leveling equipment equipped with an automatic sensor system.

To this end, the step (d) includes laying a dry shake containing cement, pigment, silica sand, aggregate, admixture, and a binder to a predetermined thickness on the cleaned concrete surface and finishing by screed polishing with a vibrating beam; And applying and curing a curing agent on the installed dry shake.

The dry shake is a type of concrete surface treatment agent manufactured by mixing concrete, a binder, and a pigment having a certain color, and a layer that protects the concrete and at the same time has waterproof properties by creating a high-strength layer showing a certain color on the surface of the concrete. to be.

The dry shake construction method is a dry shake comprising 20 to 50 parts by weight of pigment, 10 to 20 parts by weight of silica sand, 50 to 80 parts by weight of aggregate, 20 to 50 parts by weight of admixture, and 20 to 50 parts by weight of a binder, based on 100 parts by weight of cement. It can be cured by applying a curing agent on the dry shake after laying. Through this process, the dry shake can form a high-strength flat film on the surface of the concrete.

After the dry shake is formed, the surface of the dry shake may be polished with a vibrating screed to form a surface having high flatness. At this time, the flatness of the surface may be evaluated based on the same smoothness management standard as the concrete UK The Concrete Society’s TR34 (4th Edition), and it is preferable to have a smoothness that satisfies FM2 or FM1 as the standard. That is, the surface on which the dry shake is installed has an FM2 grade by satisfying E 6.5~8.0mm and F 2.0~2.2mm, or an FM1 grade by satisfying E 4.5~6.5mm and F 1.8~2.0mm. Can be done.

That is, in the case of the present invention, while the steel fiber reinforced concrete is used, it is possible to minimize the decrease in strength due to corrosion of the steel fiber, as well as to form a floor having high smoothness, so that it can be usefully used in areas where a floor having high strength and high smoothness is required. I will be able to.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, certain features shown in the drawings are enlarged or reduced or simplified for ease of description, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

Example 1

In order to confirm the effect of the present invention, a specimen having a size of 1mX1m was prepared, and the process is as follows.

The soil exposed floor was compacted using a 10-ton roller, and then an inorganic surface solidifying agent was applied.

After the solidifying agent was dried, deformed reinforcing bars with a diameter of 10 mm were disposed at intervals of 10 cm, and welded wire mesh was constructed on the floor by welding the intersection points, and zinc sacrificial electrodes connected with wires were disposed on one side of the deformed reinforcing bars.

A wire having a diameter of 1 mm was pressed into an oval shape, and then twisted into a thread shape and cut into a length of 60 mm. Both ends of the cut wire were bent upward and then downwardly bent again to form a Ω shape to prepare a steel fiber.

Concrete was prepared by mixing 50 kg of water, 100 kg of aggregate, and 100 kg of sand with 100 kg of cement, and 10 kg of the steel fiber was mixed with the concrete to prepare a steel fiber reinforced concrete. The steel fiber-reinforced concrete was poured on the floor surface at the same time as it was mixed, and the concrete surface was flattened in the pouring step.

After that, a dry shake consisting of 100 parts by weight of cement, 30 parts by weight of pigment, 15 parts by weight of silica, 60 parts by weight of aggregate, 40 parts by weight of admixture and 30 parts by weight of a binder was installed on the flattened concrete floor using dry installation equipment. It was finished, and after the installation was completed, a curing agent was applied to the surface to a thickness of 2 mm and dried.

Example 2

Except that the sacrificial electrode was not used in Example 1, it was carried out in the same manner.

Example 3

It was carried out in the same manner as in Example 1 except that the inorganic surface hardening agent was not used.

Example 4

In Example 1, the elliptical shape was produced, and the same was carried out except that the steel fiber obtained by bending the wire as it was instead of the steel fiber processed by twisting it into a thread shape was used.

Example 5

It was carried out in the same manner as in Example 1 except that the steel fiber was not used.

Example 6

Except that the welded wire mesh was not used in Example 1, it was carried out in the same manner.

Example 7

It was carried out in the same manner as in Example 1 except that the dry shake was not applied.

Test Example 1

An experiment was conducted to confirm the degree of corrosion of the steel fibers of Examples 1 to 7. 50L of water was sprayed on each specimen at intervals of 1 hour, and this was continued for 3 days. Thereafter, the specimen was pulverized to recover the steel fibers and the welded wire mesh, and then the ratio of the rusted steel fibers and the rust length generated in the welded wire mesh were measured and shown in Table 1 below.

Rusty steel fiber ratio Rust rate of welded wire mesh Example 1 0.3% 0.2% Example 2 3.8% 4.6% Example 3 1.2% 0.9% Example 4 0.4% 0.3% Example 5 - 0.2% Example 6 1.9% - Example 7 1.1% 1.3%

As shown in Table 1, when the sacrificial electrode was used (Examples 1 and 4), it was confirmed that rust was generated at a very low rate compared to Example 2 in which the sacrificial electrode was not used. However, in the case of Example 2 without using a surface hardening agent and Example 7 without using a dry shake, it was confirmed that the rate of rust generation slightly increased as the waterproofness was lowered, and Example 6 without using a welded wire net. In the case of, it was confirmed that the formation of the electrical network was not smooth and the rate of rust generation increased.

Test Example 2

Wear resistance was measured using the specimens of Examples 1 to 7 and the results are shown in Table 2 below. Abrasion resistance was measured according to the method of BS 8204-2 (2002 edition) of Chapter 5, Table5.1 of UK Concrete Society Technical Report no.34. The test equipment was fixed to the floor using a fixing pin, rotated 2850 times at a speed of 180RPM, and then measured the wear depth (mm) of eight places, which are shown in Table 2.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Wear depth 0.03 0.04 0.05 0.04 0.03 0.04 0.37

As shown in Table 2, it was found to have high abrasion resistance (SPECIAL grade) except for Example 7 in which dry shake was not used.

Test Example 3

Compressive strength and flexural strength were measured using the specimens of Examples 1 to 7. Compressive strength (Mpa) and flexural strength (Mpa) were measured at predetermined age according to KS F 2405 and KS F 2566, respectively, and 50L of water was sprayed on each specimen at intervals of 1 hour to check the change in strength due to moisture. This was continued for 3 days and then measured again. The results are shown in Table 3 below.

Compressive strength Flexural strength Compressive strength (after 3 days) Flexural strength (after 3 days) Example 1 209 61 209 60 Example 2 207 62 184 49 Example 3 208 62 195 53 Example 4 191 44 190 45 Example 5 114 29 116 27 Example 6 182 39 164 28 Example 7 201 53 200 51

As shown in Table 3, Example 1 of the present invention was found to have the highest compressive strength and flexural strength, and this was found to be maintained even after the moisture penetration test. In the case of Example 2 in which the sacrificial electrode was not used, it was confirmed that the strength was decreased after moisture penetration, and in Examples 3 and 7 in which the surface solidifying agent or dry shake was not used, the water resistance was also poor, after the moisture penetration experiment. It was confirmed that the strength fell. In the case of Example 4 in which the wire was used as it was without value of the processing used in the steel fiber of the present invention, it was confirmed that the strength was decreased, and Example 5 without using the steel fiber and Example 6 without using the welded wire net were also strength I could see that the fall.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and the present invention is not departing from the gist of the present invention claimed in the claims. Of course, various modifications may be made by those skilled in the art, and these modifications should not be individually understood from the technical idea or perspective of the present invention.

Claims (2)

(a) arranging the bottom surface and then installing a welded wire mesh;
(b) mixing steel fibers with concrete and then pouring them on the floor;
(c) arranging the surface of the poured steel fiber mixed concrete; And
(d) pouring a dry shake on the cleaned concrete surface;
In the floor finishing construction method using steel fiber reinforced concrete and dry shake comprising a,
The step (a),
Flattening the bottom surface to a certain height;
A compaction step of compacting the flattened floor surface using a roller;
Curing the bottom surface by applying a surface solidifying agent after the compaction step is completed; And
And after the surface hardening agent is cured, installing a welded wire mesh;
The bottom surface is composed of sand, soil, gravel, crushed stone or a mixture thereof,
The surface hardening agent is a silicate-based surface hardening agent,
The welded wire mesh is a welded wire mesh in which deformed reinforcing bars having a diameter of 6 to 10 mm are arranged in a grid pattern at intervals of 10 to 20 cm, and then the intersections are welded,
The welded wire mesh is arranged in one to two layers on the bottom surface,
The step (b),
Compressing a wire having a diameter of 0.1 to 3 mm so that the cross section has an oval shape or a similar shape;
Fixing the other end of the crimped wire and rotating one end to form a thread shape;
Cutting the wire processed into the thread shape to be 50 to 80 mm, and then bending the wire to have a certain shape to produce steel fibers;
Preparing a concrete mixture by mixing 10 to 70 parts by weight of water, 100 to 150 parts by weight of aggregate, 50 to 150 parts by weight of sand, and 5 to 20 parts by weight of the bent steel fiber based on 100 parts by weight of cement; And
Including the step of pouring the concrete mixture on the floor surface on which the welded wire mesh is installed,
The steel fiber forms a network structure with the welded wire mesh inside the concrete,
1 to 10 sacrificial electrodes are connected to the side of the welded wire mesh,
The sacrificial electrode is zinc or magnesium electrically connected to the welded wire mesh,
The step (c),
Flattening the poured concrete surface to be equal to or greater than FM2 based on a smoothness management standard UK The Concrete Society's TR34 (4th Edition);
The step (d) includes laying a dry shake containing cement, pigment, silica sand, aggregate, admixture, and a binder to a predetermined thickness on the cleaned concrete surface and finishing by screed polishing with a vibrating beam; And
Including the step of curing by applying a curing agent on the installed dry shake,
The dry shake includes 20 to 50 parts by weight of pigment, 10 to 20 parts by weight of silica, 50 to 80 parts by weight of aggregate, 20 to 50 parts by weight of admixture, and 20 to 50 parts by weight of binder, based on 100 parts by weight of cement,
The binder is a material that reacts with the curing agent to form a polymer. Floor finishing construction method using steel fiber reinforced concrete and dry shake.
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