JP2023551857A - Lightweight concrete deck with excellent strength and quality and its manufacturing method - Google Patents

Abstract

The present invention has a built-in FRP rod or FRP mesh manufactured from FRP (Fiber Reinforced Plastics), is lightweight, has excellent strength and quality, is environmentally friendly, and can last for a long time. The present invention relates to a lightweight concrete deck with excellent strength and quality and almost no deformation despite its use, and a method for manufacturing the same. The main body 2 includes an FRP rod 5 reinforced inside the main body 2, and recessed grooves 3 and 4 formed on both sides of the main body 2 in the longitudinal direction. An FRP mesh 6 can be used instead of the FRP rod 5. The apparatus further includes a pipe 9 for inserting a temperature regulating electric wire 8 buried inside the main body 2. The concrete deck 1 is further provided with a fixture 26 used for fixing the concrete deck 1 to the base material 33. The method for manufacturing a concrete deck of the present invention includes the steps of: a) assembling a forming form for forming a concrete deck; b) arranging and bundling FRP rods in the internal space of the forming form; and c) assembling concrete. d) curing the concrete that has been poured and vibrated for 20 to 50 hours; and e) disassembling the forming form to obtain a cured concrete deck. , f) curing the concrete deck for 60-100 hours to obtain a final concrete deck. In step b), the method further includes the step of disposing the FRP rod in the inner space of the molding frame, and disposing a temperature regulating electric wire insertion pipe in the inner space of the molding frame.

Description

The present invention relates to a lightweight concrete deck with excellent strength and quality and a method for manufacturing the same, and more specifically, the present invention relates to a lightweight concrete deck with excellent strength and quality, and more specifically, a concrete deck that incorporates FRP rods or FRP mesh manufactured from fiber reinforced plastics (FRP). This invention relates to a lightweight concrete deck that is lightweight yet has excellent strength and quality, is environmentally friendly, and does not deform even after long-term use, and a method for manufacturing the same.

Flooring materials are used in our living spaces such as sidewalks, roads, gardens, promenades, mountain trails, and building terraces. Wooden decking, which is widely used as the flooring material, is a natural material and is an environmentally friendly material that has been used for many years.

The wood decks are processed, dried, and preservative treated, but if exposed to rain, wind, snow, sunlight, etc. for a long period of time, they will deform and corrode, and their service life will be shortened due to damage from insects. It has the disadvantage of being short and having low strength.

Synthetic wood decks made by combining wood powder and resin are often used as flooring materials to compensate for the shortcomings of the wood decks mentioned above, but they are not environmentally friendly and will deteriorate over time if used for many years. Deformation (strain) and twisting occur due to changes, etc., and resurfacing work is required, and the waste generated after resurfacing work contains a large amount of synthetic resin, making it difficult to dispose of. is the current situation.

Recently, concrete decks formed from concrete have been developed and come into use because they are superior in durability and strength to wood decks and are easier to maintain.

For example, in the case of the Republic of Korea Registered Patent No. 10-2011626 (title of invention: method for producing a concrete deck in which multiple holes are formed) disclosed in Patent Document 1, a rectangular concrete deck (CD) is extruded. However, due to the characteristics of extrusion molding, the equipment and manufacturing costs are expensive, and powdered silica sand is used to prevent mold wear and to obtain an excellent surface for concrete decks. However, although many holes P are formed in the longitudinal direction to reduce concrete wear and reduce weight, it is difficult to improve the strength of concrete decks. However, there are various problems such as significantly inferior strength, especially flexural strength.

Republic of Korea Patent No. 10-2011625 (Title of invention: Method for producing concrete deck with multiple holes, patent publication dated August 9, 2009) Republic of Korea Patent No. 10-1530351 (Title of invention: Unreinforced reinforced fiber concrete-deck plate composite slab and its construction method, patent publication dated June 19, 2015) Republic of Korea Registered Utility Model No. 20-0455812 (Name of invention: Deck concrete joint block, Utility model announcement dated September 27, 2011)

The present invention was devised in order to solve various problems of conventional concrete decks manufactured by extrusion molding, and it is possible to use FRP rods or FRP rods manufactured from fiber reinforced plastics (FRP). Lightweight concrete with mesh built into the concrete, which is lightweight yet has excellent strength and quality, is environmentally friendly, and has excellent strength and quality as it hardly deforms even after long periods of use. Its purpose is to provide a deck and a method for manufacturing the same.

Another object of the present invention is to prevent ice from forming and prevent slips, falls, and safety accidents when walking by incorporating heating electric wires inside the concrete deck to keep it warm. The purpose of the present invention is to provide a lightweight concrete deck with excellent strength and quality, and a method for manufacturing the same.

In the present invention, a concrete deck formed using a forming form includes a concrete body 2 having a predetermined length, a predetermined width, and a predetermined height, and a concrete deck embedded inside the main body 2 and having a plurality of ribs 51 on the surface. A mounting system that connects the concrete deck 1 and the concrete deck 1 to each other, and includes an FRP rod body 5 in which joints 52 are formed, and recessed grooves 3 and 4 formed on both sides of the main body 2 in the longitudinal direction. The fixture 26 further includes left and right protrusions 27 that are connected to the left and right grooves 3 and 4 of the concrete deck 1 and protrude left and right to connect the concrete decks 1 to each other. , 28, and is connected to the left and right protrusions 27, 28, and has a "+" shape with upper and lower protrusions 29, 30 so that the adjacent concrete decks 1 can be fixed to the base material 33, and the upper and lower protrusions A vertical hole 32 is provided in the vertical center of each of 29 and 30, into which a screw 31 that is tightened to a base material 33 is inserted.

A concrete deck formed using the forming form includes a concrete body 2 having a predetermined length, a predetermined width, and a predetermined height, an FRP mesh 6 buried inside the main body 2, and a longitudinal part of the main body 2. Recessed grooves 3 and 4 formed on both sides of the direction, and a fixture 26 for connecting the concrete decks to each other is further provided. Left and right protrusions 27 and 28 are connected to the recessed grooves 3 and 4, respectively, and protrude left and right so as to connect the concrete decks 1 to each other; and adjacent concrete decks 1 are connected to the left and right protrusions 27 and 28. It has a "+" shape with upper and lower protrusions 29 and 30 so that it can be fixed to the base material 33, and a screw 31 that is tightened to the base material 33 is fitted into the vertical center of the upper and lower protrusions 29 and 30. A vertical hole 32 into which it is inserted is provided.

The concrete deck further includes a pipe 9 for inserting the temperature regulating electric wire 8 buried inside the main body 2, and the thickness of the pipe 9 is determined such that the strength of the main body 2 is reinforced while protecting the temperature regulating electric wire 8. The length may be 2 mm to 20 mm as shown in FIG.

The concrete deck further includes a fixture that connects the concrete decks to each other. It may be characterized in that it has a "+" shape with upper and lower protrusions so that it can be fixed to.

The forming formwork has a rectangular parallelepiped-shaped forming space or forming chamber so that a rectangular concrete deck having a predetermined thickness can be formed, and is used for reinforcing the FRP rods, arranging the FRP mesh, and pouring concrete. The top of the molding chamber is open for easy installation, and the structure is designed to facilitate disassembly and assembly so that concrete decks can be molded repeatedly.

The molding frame has a bottom plate having a plurality of protrusions projecting upwardly at predetermined intervals on the upper surface in the longitudinal direction, front, rear, left and right side plates that are connected to the peripheral edge of the bottom plate, and joint ends of the front, rear, left and right side plates. A clamp for supporting and fixing the parts, a claw member protruding inward from the middle part of the inner surface of the elongated front and rear side plates, and a molding chamber whose upper part is open.

Engagement protrusions and engagement grooves in which the engagement protrusions are engaged are formed on the peripheral edges of the bottom plate and the front, rear, left, and right side plates of the molding frame, respectively, so that a female-male fitting or a mortise-and-tenon joint type is formed. A strong assembled state is maintained by connecting and assembling with the hole joint type), and the clamps prevent the front, rear, left, and right side plates from expanding, and after the molding is completed, they are unclamped (unclamped). The structure is such that the front, rear, left and right side plates can be easily disassembled, and the cured concrete deck can be easily demolded.

The forming formwork is composed of two parts, left and right, and a partition plate is arranged vertically in the middle, and claw members are formed symmetrically on both sides of the partition plate to form two concrete decks at the same time. Good too.

In the present invention, a method for manufacturing a lightweight concrete deck with excellent strength and quality includes the steps of: a) assembling a forming form for forming the concrete deck; and b) placing an FRP rod in the forming form. c) 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, antifoaming agent/high strength admixture/strengthening agent;・Vibrating the concrete mixed with 01 to 5 parts by weight of a mixture of at least one of long fibers and short fibers and water while charging it into the molding frame, and d) After completing the charging and vibration. curing the concrete for 20 to 50 hours; e) disassembling the forming formwork to obtain a cured concrete deck; and f) curing the demolded concrete deck for 60 to 100 hours to obtain the final concrete deck. and when the size of the aggregate is 3 to 5 mm, it is mixed at 50 to 60 parts by weight of the total weight, and when the size of the aggregate is less than 3 mm, the whole It may be characterized by being mixed in an amount of 60 to 68 parts by weight.

In step b), the FRP rod is placed in the internal space of the molding form, and a pipe for inserting temperature regulating electric wires with a thickness of 2 mm to 20 mm is inserted into the molding form so that the strength of the concrete deck is reinforced. further comprising the step of disposing in the interior space.

In the method for manufacturing a concrete deck, the steps include a') assembling a forming form for forming the concrete deck, b') arranging and bundling an FRP mesh in the internal space of the forming form, and c') aggregate. A mixture of 50 to 68 parts by weight, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, and at least one of antifoaming agents, high strength admixtures, strength enhancers, long fibers, and short fibers. d') curing the concrete that has been poured and vibrated for 20 to 50 hours; e') f') curing the demolded concrete deck for 60 to 100 hours to obtain a final concrete deck; When the size of the aggregate is 3 to 5 mm, it is mixed at 50 to 60 parts by weight of the total weight, and when the size of the aggregate is less than 3 mm, it is mixed at 60 to 68 parts by weight of the total weight. It may also be characterized by:

The concrete deck 1 of the present invention is made of lightweight FRP rods 5 or FRP mesh 6, which have a far superior compressive force than the tensile force of concrete, and have about three times the tensile force of ordinary reinforcing bars. 1, it has excellent strength and quality, is environmentally friendly, is lightweight, and does not deform even after long-term use.

The present invention is manufactured from environmentally friendly flame retardant materials, so it is fire safe, does not produce toxic gas when a fire occurs, is nature friendly and can be used for a long time after construction, and does not emit harmful substances. This has the effect of minimizing waste generation.

In the present invention, the FRP rod 5 or FRP mesh 6 used in place of ordinary metal reinforcing bars is made by melting natural silica sand into glass-like fibers, twisting several hundred fibers together to form a rope, and then heat-setting the fibers. It is manufactured by depositing it in a resin solution, and it is lightweight, about 1/8th the weight of ordinary metal reinforcing bars, and is about 3 times as strong, so it has excellent strength. This has the effect of providing a lightweight concrete deck 1 that is made of high-quality materials.

In the present invention, by arranging the FRP rods 5 or FRP mesh 6 at the bottom of the concrete deck 1, the deflection stress concentrated at the bottom of the concrete deck 1 can be positively dealt with. This has the effect of significantly improving the deflection strength of deck 1.

According to the present invention, temperature regulating electric wires 8 are built into the concrete deck 1 which has built-in FRP rods 5 or FRP mesh 6, and the generated heat prevents ice from forming, thereby preventing pedestrians from slipping and falling. This has the effect of preventing injuries and safety accidents.

The present invention easily and conveniently forms recessed grooves 3 and 4 on both longitudinal sides of a concrete deck 1 using claw members 19 and 20 formed oppositely on both sides of the inner side of a forming form 10. It has the effect of being able to

On the other hand, although concrete C has a high compressive strength, the tensile force is small and it breaks while causing cracks. By reinforcing the concrete deck 1 at step 6, not only sufficient deformation performance and resistance are ensured, but also the lightweight concrete deck 1 has significantly improved deflection strength and has excellent overall strength and quality. There is an effect that can be obtained.

INDUSTRIAL APPLICABILITY The present invention is very useful because the concrete deck 1 incorporating the FRP rods 5 or the FRP mesh 6 can be constructed from square plates or concrete panels 46, and can be used as an interior/exterior material of a building. This is a great invention.

A perspective view of a conventional concrete deck. FIG. 1 is a perspective view of a concrete deck shown as an example of the present invention. The perspective view of the concrete deck shown as another example of the present invention. The perspective view of the concrete deck shown as yet another example of the present invention. FIG. 2 is a perspective view of an FRP rod shown as an example of the present invention. FIG. 1 is a perspective view of an FRP mesh shown as an example of the present invention. FIG. 3 is a perspective view of an FRP mesh shown as another example of the present invention. FIG. 1 is a perspective view of a molding frame shown as an example of the present invention. FIG. 2 is a cross-sectional view in the width direction of a molding frame shown as an example of the present invention. FIG. 2 is a cross-sectional view showing a state in which FRP rods are reinforced in a molding frame shown as an example of the present invention. FIG. 2 is a cross-sectional view showing a state in which concrete is poured and formed into a forming form shown as an example of the present invention. FIG. 3 is a sectional view of a molding frame shown as another example of the present invention. The perspective view of the shaping|molding frame shown as another example of this invention. FIG. 3 is a cross-sectional view in the width direction of a molding frame shown as another example of the present invention. FIG. 6 is a longitudinal sectional view of a state in which FRP rods are reinforced in a molding frame shown as another example of the present invention. FIG. 3 is a cross-sectional view showing a state in which concrete is poured and formed into a molding frame shown as another example of the present invention. FIG. 3 is a cross-sectional view of a molding frame shown as still another example of the present invention. FIG. 2 is a perspective view of a fixture shown as an example of the present invention. FIG. 6 is a perspective view of a fixture shown as another example of the present invention. FIG. 1 is a plan view of a concrete deck in a constructed state as an example of the present invention. FIG. 1 is a sectional view of a concrete deck in a construction state as an example of the present invention. FIG. 1 is an enlarged cross-sectional view of a concrete deck in a constructed state as an example of the present invention. FIG. 3 is a cross-sectional view of a concrete deck in a construction state shown as another example of the present invention. The perspective view of the concrete panel shown as another example of the present invention.

A concrete deck formed using the forming form of the present invention includes a concrete body 2 having a predetermined length, a predetermined width, and a predetermined height, and a concrete body 2 that is buried inside the main body 2 and has a plurality of ribs 51 on the surface. It is equipped with an FRP rod body 5 having a diameter of 5 to 15 mm in which nodes 52 are formed, and recessed grooves 3 and 4 formed on both sides of the main body 2 in the longitudinal direction, so that the concrete deck and the concrete deck are mutually connected. The connecting fittings 26 are connected to the left and right recessed grooves 3 and 4 of the concrete deck 1, respectively, and the left and right fittings 26 protrude to the left and right so that the concrete decks 1 can be connected to each other. It has a "+" shape with upper and lower protrusions 29 and 30 that are connected to the left and right protrusions 27 and 28 and can fix adjacent concrete decks 1 to the base material 33. A vertical hole 32 is formed in the vertical center of the protruding parts 29 and 30, into which a screw 31 is inserted to be tightened to the base material 33, and the concrete body 2 contains 50 to 68 parts by weight of aggregate and 50 to 30 parts by weight of cement. parts by weight, 1 to 5 parts by weight of a dye, 01 to 5 parts by weight of a mixture of at least one of antifoaming agents, high-strength admixtures, strength enhancers, long fibers, and short fibers, and water are mixed and molded. Characterized by being cultivated.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings. In describing the embodiments of the present invention, the same components in the figures will be given the same reference numerals as much as possible, and specific descriptions of related known configurations and functions will not obscure the gist of the present invention. Items omitted in the accompanying drawings and illustrated in the accompanying drawings are diagrammatic drawings for easily explaining the embodiments of the present invention, and may differ from the form actually realized.

FIG. 2 is a perspective view of a concrete deck 1 shown as an example of the present invention, and includes a main body 2 formed from concrete C, which has a predetermined planar area and height (thickness), and a longitudinal direction of the main body 2. Horizontal recessed grooves 3 and 4 formed to a predetermined depth on both sides of the direction, an FRP rod 5 or FRP mesh 6 buried (embedded and disposed) inside the main body 2, and an upper part of the main body 2. It is provided with a plurality of anti-slip grooves 7 which are recessed in the surface and prevent pedestrians from slipping.

FIG. 2 is a perspective view of the concrete deck 1 in which the FRP rods 5 are buried, and FIG. 3 is a perspective view of the concrete deck 1 in which the FRP mesh 6 is buried.

The main body 2 is made by uniformly mixing 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, and 1 to 5 parts by weight of pigment, and then mixing the mixture with water to have an appropriate slump value and thoroughly stirring the mixture. It is manufactured by molding and curing concrete C.

The concrete C is further mixed with 1 to 5 parts by weight of other mixtures such as a defoamer, a high-strength admixture, a strength enhancer, long fibers, and short fibers. At least one of the above-mentioned other mixtures is included.

When the size of the aggregate is 3 to 5 mm, it is mixed at 50 to 60 parts by weight of the total weight, and when the size of the aggregate is less than 3 mm, it is mixed at 60 to 68 parts by weight of the total weight. may be mixed at the same time.

The slump value is one of the measures indicating the fluidity or workability of concrete C, and if the slump value is large, the kneading condition of concrete C becomes sloppy, resulting in poor workability and fluidity. However, if the slump value is small, the fluidity and workability of concrete C will be poor, whereas the concrete deck 1 curing speed becomes faster.

In order to quickly demold the concrete deck 1 formed in the present invention, by omitting the components of the claw members 19 and 20, it is easier to demold the concrete deck 1 that has been formed and temporarily cured. In such a case, grooves 3 and 4 of a predetermined depth may be separately formed on both sides of the demolded concrete deck 1 in the longitudinal direction.

FIG. 4 is a perspective view of another embodiment of the concrete deck 1 of the present invention, in which at least one pipe 9 through which a temperature regulating electric wire 8 is inserted is buried inside the main body 2 in the longitudinal direction. can. In FIG. 4, two pipes 9 are buried apart from each other so that two temperature regulating electric wires 8 can be inserted through them.

The pipe 9 may be made of a metal with excellent thermal conductivity, that is, an aluminum pipe or a copper pipe that can effectively conduct the heat emitted from the temperature regulating electric wire 8 to the concrete body 2. good.

The terminal 8a of the temperature regulating electric wire 8 is connected in series with the terminal 8a of the temperature regulating electric wire 8 of the adjacent concrete deck 1, connected in parallel, or connected in series and parallel, and then connected to the power supply line. The temperature is controlled by connecting the power supply line to a power supply line having a controller, and controlling the ON/OFF state.

The inside of the pipe 9 is formed with a hollow space 9a having a size slightly larger than the outer diameter of the temperature regulating electric wire 8, or a space 9a open in the longitudinal direction so that the temperature regulating electric wire 8 can be easily inserted. The space 9a has the same or similar shape to the temperature regulating electric wire 8, and effectively transmits the heat emitted from the temperature regulating electric wire 8 to the main body 2.

The thickness of the pipe 9 may be 2 mm to 20 mm so that it can reinforce the strength of the main body 2 while protecting the temperature regulating electric wire 8. Since it is buried in the concrete of the main body 2, the thickness of the pipe 9 may be 2 mm to 20 mm. The strength, especially the flexural strength, is further reinforced and improved.

The FRP rod 5 is a rod-shaped object formed from FRP, and as shown in FIG. Since the concrete placed by the ribs 51 and the joints 52 is well bonded, the adhesion strength of the concrete is improved by more than twice that of circular reinforcing bars, etc., and the bending strength of the main body 2 is greatly improved.

The FRP mesh 6 is also configured such that the horizontal bars and vertical bars formed from FRP are orthogonal to each other as shown in FIG. The lattice structure greatly improves the strength of the main body 2, especially the bending strength.

FRP, which is the main material of the FRP rod body 5 or the FRP mesh 6, is manufactured by molding from fiber reinforced plastic (FRP), and is lightweight, has excellent strength and quality, is environmentally friendly, and has a long lifespan. A lightweight concrete deck 1 with almost no deformation despite being used for a long period of time can be obtained.

The FRP (Fiber Reinforced Plastics) is a plastic-based composite material reinforced with glass and carbon fibers, and is a high-performance, highly functional material that is lightweight, has excellent corrosion resistance, and moldability. Note that FRP has excellent mechanical properties, corrosion resistance of plastics, and excellent moldability, and is a lightweight structural material that has a wide range of applications.

On the other hand, the FRP rod 5 or FRP mesh 6 of the present invention is made by melting silica sand, which is a natural material, into glass-like fibers, kneading several hundred of them into a rope shape, and depositing them in a thermosetting resin solution. By manufacturing, it is possible to obtain an FRP rod 5 or FRP mesh 6 that is about 1/8 the weight of normal reinforcing bars, is lightweight, and has about 3 times or more strength compared to normal reinforcing bars. I can do it.

The FRP rod 5 or the FRP mesh 6 is a composite of fibers and resin, and the fibers mainly used are unidirectional continuous fibers such as glass fiber and aramid fiber. , carbon fiber, basalt fiber, and the like. Each material can be used selectively depending on the deflection strength required for the decking material, and is a good alternative for the wooden decking and synthetic timber decking currently in use as decking materials for pedestrians and pedestrians. It is preferable to use an FRP rod 5 or an FRP mesh 6 whose main material is cheap glass fiber.

On the other hand, the concrete deck 1 of the present invention was vibration-formed into a length L 1,000 mm x width W 160 mm x height H 30 mm using a forming form 10, and then cured for several days at room temperature of 20°C to 30°C. A normal extruded concrete deck and a normal wood deck were tested by KCL (Korea Construction and Living Environment Testing and Research Institute) and the results are shown in Table 1 below.

As shown in Table 1 above, the strength of a normal wood deck is 4,000N (MPa), and the strength of a normal extruded concrete deck is 2,400N, whereas the concrete deck 1 of the present invention has a high strength. A deflection strength of 9,000 to 10,000 N could be obtained using the strong, lightweight FRP rod 5 or FRP mesh 6.

That is, the concrete deck 1 of the present invention reinforced by the FRP rods 5 or the FRP mesh 6 has a deflection strength 225 to 25 times better than a normal wood deck, and compared to a normal extruded concrete deck. It can be seen that the deflection strength is 375 to 416 times better, so it can be seen that the deflection strength of the concrete deck 1 of the present invention is much better than the two product groups.

The concrete deck 1 of the present invention is formed using a forming form 10.

The forming formwork 10 has a forming space or forming chamber 101 in the shape of a rectangular parallelepiped so that a rectangular concrete deck 1 having a predetermined thickness can be formed. The upper part of the molding chamber 101 is open to facilitate construction and pouring of concrete C, and the configuration is such that it can be easily disassembled and assembled so that the concrete deck 1 can be molded repeatedly.

FIG. 8 is a perspective view of the assembled molding frame 10 shown as an example of the present invention, and includes a bottom plate 12 having a plurality of protrusions 11 projecting upward at predetermined intervals on the upper surface in the longitudinal direction. , front, rear, left and right side plates 13, 14, 15, 16 coupled to the peripheral edge of the bottom plate 12; a clamp 17 for supporting and fixing the joint ends of the front, rear, left and right side plates 13, 14, 15, 16; A molding chamber 101 is provided with claw members 19 and 20 that protrude inward from approximately the middle portions of the inner surfaces of the front and rear side plates 13 and 14, and is surrounded by the bottom plate 12 and the front, rear, left and right side plates 13, 14, 15 and 16. is configured so that the upper part thereof is open to facilitate the reinforcement of the FRP rod 5, the arrangement of the FRP mesh 6, and the placement of concrete C.

Recessed grooves 3 and 4 are naturally formed on both sides of the concrete body 2 in the longitudinal direction, which is cast and cured by the protruding structure of the claw members 19 and 20, and the FRP rod body 5 or FRP mesh is reinforced. This is a member that also has the function of supporting the peripheral portion of No. 6 on which it is placed.

Engagement protrusions 12a, 13a, 14a, 15a, 16a and engagement protrusions 13a, 14a, 15a, 16a are engaged with the peripheral edges of the bottom plate 12 and the front, rear, left and right side plates 13, 14, 15, 16. Engagement grooves are formed respectively, and not only a strong assembled state is maintained by coupling and assembling by female-male fitting or mortise-tenon joint type, but also the front, rear, left and right side plates 13, 14, 15, 16 are secured by clamps 17. The expansion of the concrete deck is prevented, and after the forming is completed, the front, rear, left and right side plates 13, 14, 15, 16 can be easily disassembled after removing the clamp 17, resulting in a cured concrete deck. 1 can be easily demolded.

The clamp 17 includes a fixing part 17c fixed to the outer surface of the front, rear, left, and right side plates 13, 14, 15, and 16, one end of a connecting ring 17b that is axially connected to the fixing part 17c, and a connecting ring 17b. and a locking fitting 17a that is axially coupled to the other end of the locking member 17a.

When the molding frame 10 is clamped by the clamp 17, the locking fittings 17a are rotated in a right angle direction and moved and rotated so as to touch the outer surfaces of the adjacent side plates, and the fittings are connected by female-male fitting or a mortise-and-tenon joint type. The corner portions of the side plates that have been clamped are caught and prevented from expanding, and on the other hand, when unclamping, the locking fittings 17a are rotated in the opposite direction to move away from the outer surfaces of the adjacent side plates. When the side plates that are unclamped and connected by female-male fitting or mortise-and-tenon joints are removed, the forming formwork 10 can be easily removed, making it possible to easily demold the concrete deck 1 that has been formed and temporarily cured. become.

The forming form 10 has a rectangular parallelepiped shape so that the concrete deck 1 can be formed, and is a component that can be easily disassembled/assembled. It is opened so that it can be installed.

The molding frame 10 may be made of a metal or hard synthetic resin plate material that is easy to disassemble and assemble and has excellent strength.

A plurality of upward protrusions 11 are formed on the upper surface of the bottom plate 12, and anti-slip grooves 7 having the same shape as the protrusions 11 are spaced at predetermined intervals on the upper surface of the concrete deck 1 to be formed and cured. It is formed.

The protrusion 11 has a predetermined height L1 and a predetermined width W1, and is formed so that the width becomes gradually narrower as it goes upward so that it can be easily removed from the mold after molding.

FIG. 9 is a cross-sectional view of the forming frame 10 in the width direction, and FIG. 10 is a sectional view of the forming frame 10 in the width direction, and FIG. After arranging (reinforcing) a plurality of FRP rods 5 at predetermined intervals on the upper surface of the receiving rod 18, the FRP rods 5 are tied together with binding wires 21. When the base 24 supporting the bottom plate 12 is vibrated by the vibration means 25 while pouring and pouring the concrete C into the open molding chamber 101, as shown in FIG. Since the concrete C is hardened while the entire forming form 10 vibrates, a concrete deck 1 with high density is formed.

The vibrating means 25 is not limited to the base 24, but may also be a vibrating means that is placed inside the concrete C or the molding chamber 101 to vibrate the concrete C, such as a plug-in vibrator, a mold vibrator, a surface vibrator, etc. A vibrator etc. can be used.

On the other hand, when the concrete C was poured, the concrete deck 1, which had been temporarily cured for a predetermined period of time, for example, 8 to 30 hours at room temperature of 20 to 30°C, was demolded from the forming form 10. Afterwards, it is completely cured for several days at room temperature of 20 to 30°C before use.

The fully cured concrete deck 1 will be used upside down so that the anti-slip grooves 7 are located at the top. Therefore, the anti-slip grooves 7 will prevent pedestrians from slipping, and the concrete deck will look like a glass surface. It is manufactured with high precision and good appearance, and it is also easy to remove the mold from the molding frame 10.

Since the claw members 19 and 20 are located at the middle height of the concrete deck 1, the recessed grooves 3 and 4 formed on both longitudinal sides of the concrete deck 1 are also located at the middle height of the concrete deck 1. It also serves as a fixing groove when fixing to the base material.

In addition, when forming the concrete deck 1, the FRP rods 5 or FRP mesh 6 reinforced on the upper surfaces of the claw members 19, 20 are formed into recessed grooves 3, when the concrete deck 1 is turned over after forming and curing. Since the concrete deck 1 is located at the lower part of the concrete deck 1, the deflection stress concentrated in the lower part of the concrete deck 1 is actively dealt with, so that the deflection strength of the concrete deck 1 is greatly improved.

That is, the present invention makes use of the property that the compressive force of concrete is far superior to the tensile force, and the strong tensile force (approximately three times that of ordinary reinforcing bars) of the FRP rod 5 or FRP mesh 6. By arranging the FRP rods 5 or the FRP mesh 6 at the lower part of the deck 1, the lightweight concrete deck 1 with excellent strength, especially flexural strength, can be manufactured from a structurally mechanically minimum amount of materials.

FIG. 12 is a cross-sectional view of a molding frame 10b according to another embodiment of the present invention. This shows that two concrete decks 1 can be formed simultaneously by forming claw members 19 and 20 symmetrically on both sides of the plate 48.

FIGS. 13 to 16 are views of other embodiments of the molding frame 10a, in which at least one support piece 22, 23 is included on the inner surface of the left and right side plates 15, 16 of the molding frame 10a. As shown in FIGS. 15 and 16, the concrete deck 1 is formed by forming the pipes 9 so as to protrude in the direction facing each other so that both ends of the pipe 9 through which the temperature regulating electric wire 8 is inserted are inserted and supported. A pipe 9 for inserting a temperature regulating electric wire 8 is built in, and a concrete deck 1 as shown in FIG. 4 is obtained.

FIG. 13 is a perspective view of the molding frame 10a, FIG. 14 is a cross-sectional view of the molding frame 10a in the width direction, and FIG. 15 is a longitudinal sectional view of the mold with the FRP rods 5 reinforced. 16 is a cross-sectional view of the frame 10, and FIG. 16 is a cross-sectional view of the forming form 10 in the width direction in a state in which concrete C is poured.

FIG. 17 is a cross-sectional view of a molding frame 10c shown as yet another embodiment, in which at least one support is provided on the inner surfaces of the left and right side plates 15 and 16 so that both ends of the pipe 9 can be inserted. The molding frame provided with the pieces 22 and 23 is composed of two left and right parts, and a partition plate 49 is arranged vertically in the middle, and claw members 19 and 20 are formed symmetrically on both sides of the partition plate 49. This shows that two concrete decks 1 can be formed at the same time by doing so.

18 and 19 show the fixtures 26 used when fixing the concrete decks 1 arranged in order to the base material 33, and FIG. 18 shows the fixtures 26 provided in a circular shape, and FIG. is provided in a square shape.

The fixture 26 has left and right protrusions 27 and 28 that are connected to the left and right recessed grooves 3 and 4 of adjacent concrete decks 1, respectively, and that protrude left and right so that the concrete decks 1 can be connected to each other. It has a "+" shape with upper and lower protrusions 29, 30 connected to the protrusions 27, 28 of the concrete deck 1, so that the adjacent concrete decks 1 can be fixed to the base material 33.

The fixture 26 has sufficient length and width to be fully connected to the recessed grooves 3 and 4 formed in the concrete deck 1, and the vertical center portions of the upper and lower protrusions 29 and A vertical hole 32 into which a bolt or screw 31 to be tightened is inserted is formed in the material 33, and as shown in FIGS. 1 is fixed to the base material 33.

If a cushioning material 34 such as a rubber plate is fitted and fixed between the concrete deck 1 and the base material 33, even if a pedestrian walks on the concrete deck 1, the impact will be alleviated.

As shown in FIGS. 20 and 21, at least two or more of the base materials 33 are spaced apart from each other to fix the concrete deck 1, and the bottom surfaces of the base materials 33 are connected to the lower frame 35. The lower frame 35 is fixed to the bracket 36 by a tightening member 37 after contacting the upper surface of the vertical frame 38 , and the lower frame 35 is fixed to the bracket 39 by a tightening member 40 after contacting the upper surface of the vertical frame 38 . is fixed to the bracket 42 by a tightening member 43 after coming into contact with the foundation concrete 41 buried in the ground GL.

Therefore, as shown in FIG. 20, the concrete deck 1 is located in a direction perpendicular to (perpendicular to) the upper surfaces of the plurality of base materials 33 arranged in parallel, but is fixed by the fixtures 26.

FIG. 23 is a sectional view of another embodiment of the present invention, in which the bracket 36, the fastening member 37, and the anchor bolt 44 are used to attach concrete to the surface of various structures and/or the upper part of the floor surface 45. This shows that the base material 33 to which the deck 1 is fixed can be fixed.

FIG. 24 shows a structure in which a concrete deck 1 incorporating FRP rods 5 or FRP mesh 6 of the present invention is constructed from panels 46 in the shape of square plates for interior/exterior of a building with light weight and high strength characteristics. It is constructed so that it can be used as a material.

Table 2 below is a table comparing the tensile strength, specific gravity, and specific strength of each material (each material) compared to normal reinforcing bars.

The FRP rod 5 is a rod-shaped object with a diameter of 5 to 15 mm, with a plurality of ribs 51 and knots 52 formed on the surface (outer periphery), like a deformed reinforcing bar, and is positioned at the bottom of the concrete deck 1. 5 to 10 FRP rods 5 (with an interval of 15 to 30 mm) are arranged in the longitudinal direction, and the receiving rods 18 in the width direction supported by the claw members 19 and 20 are 100 to 300 mm in length. After arranging the FRP meshes 6 at intervals, the intersections of the FRP rods 5 and the receiving rods 18 are bound and fixed using the binding wires 21. The concrete deck 1 is manufactured by embedding it so that it has a mesh of 10 to 100 mm horizontally and vertically, and burying it at the bottom of the concrete deck 1.

Table 3 below compares the characteristics of ordinary metal reinforcing bars and FRP rod 5, and the FRP rod 5 of the present invention is guaranteed to have a semi-permanent life without oxidation corrosion, and has the same characteristics as ordinary metal reinforcing bars. It has a tensile strength that is more than 3 times higher than metal reinforcing bars, is about 1/8th the weight (lightness), has strong resistance to chlorine ions and chemical exposure, and has excellent thermal conductivity. It is a very low nonconductor, has resistance to electric/magnetic fields and radioactivity, and its light weight allows for savings in transportation and storage costs, as well as ease of movement, and allows for easy and fast installation on site. Work time is shortened and construction costs are reduced.

The present invention not only allows easy molding of a high-strength concrete deck 1 product using the FRP rods 5 or FRP mesh 6, but also reduces molding and construction costs, and since it does not oxidize, it has a long lifespan. is semi-permanent, and concrete C contains a large amount of SiO ₂ mixed therein.

On the other hand, synthetic wood decks manufactured from ordinary synthetic wood are made of a mixture of 40-50% wood flour and 60-50% polypropylene (PP) and polyethylene (PE) chips, and are subject to severe corrosion. The lifespan is shortened and the strength is also significantly inferior.

Table 4 below shows examples of the corresponding diameters (or thicknesses) between ordinary metal reinforcing bars and FRP rods 5. Not only can the diameter (thickness) be significantly reduced compared to metal reinforcing bars, but it is also lightweight, weighing about 1/8th (kg) of normal metal reinforcing bars.

When the concrete deck 1 of the present invention is formed using the forming form 10, it is formed upside down. That is, although the anti-slip grooves 7 formed by the protrusions 11 on the bottom plate 12 of the molding form 10 are located at the bottom of the molding form 10 during molding, when the mold is turned over after demolding, the anti-slip grooves 7 are formed. This part will be the upper part where pedestrians will step to come and go.

The concrete deck 1 of the present invention is a concrete product having a predetermined length L, a predetermined width W, and a predetermined height H, and for reinforcement of strength, FRP rods are used instead of metal reinforcing bars or metal mesh. The body 5 or the FRP mesh 6 is built-in (embedded) and used.

As illustrated in FIG. 2, the concrete deck 1 of the present invention is composed of a long horizontal part with a length L, a vertical part with a short width W, and a thick part with a predetermined height H. , FRP rod 5 or FRP mesh 6 is built inside, and the bending strength is greatly improved.

The concrete deck 1 of the present invention is constructed using a forming form 10 having a predetermined thickness H, a predetermined length L, and a predetermined width W. It is manufactured by molding and curing, and the manufacturing process is as follows.

a) assembling a forming form for forming a concrete deck; b) arranging and bundling the FRP rods in the internal space of the forming form; c) adding 50 to 68 parts by weight of aggregate and 50 to 68 parts by weight of cement. 30 parts by weight, 1 to 5 parts by weight of pigment, 01 to 5 parts by weight of a mixture of at least one of antifoaming agent, high strength admixture, strength enhancer, long fiber, short fiber, and water are mixed and stirred. d) curing the poured and vibrated concrete for 20 to 50 hours; and e) disassembling the forming form and curing the concrete deck. and f) curing the demolded concrete deck for 60 to 100 hours to obtain a final concrete deck.

The step b) may further include the step of disposing the FRP rod in the inner space of the molding frame, and disposing a temperature regulating wire insertion pipe in the inner space of the molding frame.

In step b), instead of the FRP rod, an FRP mesh may be provided in the internal space of the molding frame.

The FRP used for the FRP rod 5 or the FRP mesh 6 of the present invention is a material attempted to fundamentally solve the problem of corrosion of reinforcing bars in reinforced concrete structures, and FRP is used as a rod in the shape of deformed reinforcing bars. By molding and manufacturing, concrete adhesion performance is greatly ensured.

The present invention is manufactured from environmentally friendly flame retardant materials, is fire safe, does not produce toxic gas when a fire occurs, is natural and can be used for a long time after installation, and does not emit harmful substances. Therefore, the generation of waste can be minimized.

The present invention utilizes the strong tensile force (approximately three times that of ordinary reinforcing bars) of the FRP rod 5 or FRP mesh 6, which has a far superior compressive force than the tensile force of concrete C, to create a deck material. By arranging the FRP rod 5 or the FRP mesh 6 on the lower side of the center, it is possible to manufacture a high-strength concrete deck 1 from a structurally mechanically minimum amount of materials.

According to the present invention, when forming the concrete deck 1 incorporating the FRP rod body 5 or the FRP mesh 6, it is possible to incorporate the temperature regulating electric wire 8 inside, and the problem of freezing in winter is solved, so that the problem of freezing Therefore, it can be effectively used in places where walking is problematic.

The present invention has a thermal conductivity coefficient of 1/100 of iron (iron: 46, FRP: 035 (w/m°C)) by disposing the FRP rod 5 or FRP mesh 6 at the bottom of the concrete deck 1. By preventing heat from escaping to the bottom, it is possible to prevent ice formation in winter even with a small amount of electricity due to its good thermal efficiency, which prevents slips when walking and resulting falls and safety accidents. It will be done.

It goes without saying that in the present invention, if freezing of the concrete deck 1 is not considered a problem, or if the concrete deck 1 is used in a place where freezing does not occur, the components of the pipe 9 and the temperature regulating electric wire 8 can be omitted. do not have.

Concrete C has high compressive strength but low tensile force, so it breaks while causing cracks. Therefore, in the present invention, by reinforcing the FRP rod 5 or FRP mesh 6 with high tensile strength so as to be located at the lower part of the center (lateral center) of the main body 2, the concrete C main body 2 is sufficiently reinforced. It is possible to obtain a lightweight concrete deck 1 that not only ensures deformation performance and proof strength, but also has significantly improved deflection strength and has excellent overall strength and quality.

The present invention described above is not limited to this embodiment and the accompanying drawings, and various modifications and changes can be made without departing from the technical idea of the present invention. It is obvious to a person having ordinary knowledge in the technical field to which the invention pertains.

As mentioned above, by providing a lightweight concrete deck with excellent strength and quality and a method for manufacturing the same according to the present invention, the concrete deck 1 has a far superior compressive force than the tensile force of concrete, and can be made with ordinary reinforcing steel. By reinforcing the concrete deck 1 with lightweight FRP rods 5 or FRP mesh 6, which have a tensile strength about three times that of the concrete deck 1, it has excellent strength and quality, is environmentally friendly, and is lightweight. It has the effect of not deforming even after long-term use, and is fire-safe because it is manufactured from environmentally friendly flame-retardant materials, and no toxic gas is produced when a fire occurs, and it naturally disappears after construction. The FRP rod 5 or FRP mesh 6, which is used in place of ordinary metal reinforcing bars, is a natural material that is gentle and can be used for a long time, does not emit harmful substances, and can minimize waste generation. It is manufactured by melting silica sand into glass-like fibers, twisting several hundred fibers together to form a rope, and depositing it in a thermosetting resin solution.It weighs about 100% compared to ordinary metal reinforcing bars. It is 1/8 the weight and is about 3 times as strong, so it has the effect of producing a lightweight concrete deck 1 with excellent strength, so it has great industrial applicability. It can be said that this is an expensive invention.

1 Concrete deck 2 Main body 3, 4 Recessed groove 5 FRP rod 6 FRP mesh 7 Anti-slip groove 8 Temperature regulating electric wire 9 Pipe 10, 10a, 10b, 10c Formwork 11 Projection 12 Bottom plate 12a, 13a, 14a, 15a, 16a Engagement protrusion 13, 14, 15, 16 Front, rear, left and right side plates 17 Clamp 19, 20 Claw member 21 Binding wire 23 Support piece 24 Base 25 Vibration means 26 Mounting tool 27, 28, 29, 30 Projection 33 Base material 31 Screw 32 Vertical hole 34 Buffer material 35 Lower frame 36 Bracket 37 Tightening member 38 Vertical frame 41 Foundation concrete 46 Panel 101 Molding room

Claims (6)

Concrete decks are formed using molding forms.
a concrete body (2) having a predetermined length, a predetermined width, and a predetermined height;
An FRP rod (5) with a diameter of 5 to 15 mm, which is buried inside the main body (2) and has a plurality of ribs (51) and knots (52) formed on the surface;
Recessed grooves (3) and (4) formed on both longitudinal sides of the main body (2);
Equipped with
Further comprising a fixture (26) for connecting the concrete decks to each other,
The fixture (26) is connected to the left and right recessed grooves (3) and (4) of the concrete deck (1), respectively, and has left and right protrusions that protrude left and right so that the concrete decks (1) can be connected to each other. (27) (28), and upper and lower protrusions (29) (30) connected to the left and right protrusions (27) (28), so that the adjacent concrete decks (1) can be fixed to the base material (33). ), and a vertical hole (32) into which a screw (31) to be tightened to the base material (33) is inserted is formed in the vertical center of the upper and lower protrusions (29) and (30). is,
The concrete body (2) contains 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, antifoaming agent, high strength admixture, strength enhancing material, long fibers, short fibers, etc. A lightweight concrete deck with excellent strength and quality, characterized in that 1 to 5 parts by weight of a mixture of at least one type of fiber and water are mixed, molded, and cured. Concrete decks are formed using molding forms.
a concrete body (2) having a predetermined length, a predetermined width, and a predetermined height;
an FRP mesh (6) buried inside the main body (2), in which FRP rods with a diameter of 2 to 5 mm are maintained at intervals of 10 to 100 mm horizontally and vertically;
Recessed grooves (3) and (4) formed on both longitudinal sides of the main body (2);
Equipped with
Further comprising a fixture (26) for connecting the concrete decks to each other,
The fixture (26) is connected to the left and right recessed grooves (3) and (4) of the concrete deck (1), respectively, and has left and right protrusions that protrude left and right so that the concrete decks (1) can be connected to each other. (27) (28), and upper and lower protrusions (29) (30) connected to the left and right protrusions (27) (28), so that the adjacent concrete decks (1) can be fixed to the base material (33). ), and a vertical hole (32) into which a screw (31) to be tightened to the base material (33) is inserted is formed in the vertical center of the upper and lower protrusions (29) and (30). is,
The concrete body (2) contains 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, antifoaming agent, high strength admixture, strength enhancing material, long fibers, short fibers, etc. A lightweight concrete deck with excellent strength and quality, characterized in that 1 to 5 parts by weight of a mixture of at least one type of fiber and water are mixed, molded, and cured. The concrete body (2) further includes a pipe (9) for inserting the temperature regulating electric wire (8), and the thickness of the pipe (9) is such that while protecting the temperature regulating electric wire (8), The lightweight concrete deck with excellent strength and quality according to claim 1 or 2, characterized in that the concrete body (2) has a strength of 2 mm to 20 mm so as to be reinforced. The molding frame has a plurality of protrusions (12) that protrude upwardly at predetermined intervals on the upper surface of the bottom plate (12) in the longitudinal direction, and that gradually become narrower as they move upward to facilitate demolding. 11) and
Front, rear, left and right side plates (13) (14) (15) (16) connected to the peripheral edge of the bottom plate (12);
a clamp (17) that supports and fixes the joint ends of the front, rear, left and right side plates (13), (14), (15) and (16);
Claw members (19) (20) protruding inward from the middle portions of the inner surfaces of the elongated front and rear side plates (13) (14);
A molding chamber (101) surrounded by a bottom plate (12) and front, rear, left and right side plates (13), (14), (15) and (16), and having an open upper part;
Engagement protrusions (12a) (13a) (14a) (15a) (16a) where the bottom plate (12) and the peripheral edges of the front, rear, left and right side plates (13, (14), (15), and (16) are connected;
an engagement groove in which the engagement protrusion (13a) (14a) (15a) (16a) is engaged;
Equipped with
The clamp (17) includes a fixing part (17c) fixed to the outer surface of the front, rear, left, and right side plates (13, 14, 15, and 16), respectively, and a connecting ring that is axially connected to the fixing part (17c). (17b) and a locking fitting (17a) that is pivotally coupled to the other end of the connecting ring (17b). Lightweight concrete deck. In the concrete deck manufacturing method,
a) assembling forming forms for forming the concrete deck;
b) arranging and bundling the FRP rods in the internal space of the molding form;
c) 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, and at least one of an antifoaming agent, a high-strength admixture, a strength enhancer, long fibers, and short fibers. vibrating concrete mixed with 01 to 5 parts by weight of a mixture of seeds or more and water while being poured into a forming form;
d) curing the concrete that has been poured and vibrated for 20 to 50 hours;
e) disassembling the forming formwork to obtain a cured concrete deck;
f) curing the demolded concrete deck for 60 to 100 hours to obtain a final concrete deck;
including, but
In said step b),
The FRP rod is placed in the internal space of the molding form, and a 2mm to 20mm thick temperature control wire insertion pipe is placed in the internal space of the molding form to reinforce the strength of the concrete deck. further includes steps,
When the size of the aggregate is 3 to 5 mm, it is mixed at 50 to 60 parts by weight of the total weight, and when the size of the aggregate is less than 3 mm, it is mixed at 60 to 68 parts by weight of the total weight. A method for producing a lightweight concrete deck with excellent strength and quality, characterized by mixing in the weight part. In the concrete deck manufacturing method,
a') assembling a forming form for forming the concrete deck;
b') arranging and bundling the FRP mesh in the internal space of the molding form;
c') 50 to 68 parts by weight of aggregate, 50 to 30 parts by weight of cement, 1 to 5 parts by weight of pigment, and at least one of antifoaming agent, high strength admixture, strength enhancing material, long fiber, and short fiber. vibrating concrete mixed and stirred with one or more types of mixture 01 to 5 parts by weight and water while being poured into a forming form;
d') A step of curing the concrete that has been poured and vibrated for 20 to 50 hours;
e') disassembling the forming formwork to obtain a cured concrete deck;
f') curing the demolded concrete deck for 60 to 100 hours to obtain a final concrete deck;
including, but
In step b'),
Step of arranging FRP mesh in the internal space of the forming formwork and also placing a 2mm to 20mm thick temperature control wire insertion pipe in the internal space of the forming formwork so as to reinforce the strength of the concrete deck. further including;
When the size of the aggregate is 3 to 5 mm, it is mixed at 50 to 60 parts by weight of the total weight, and when the size of the aggregate is less than 3 mm, it is mixed at 60 to 68 parts by weight of the total weight. A method for producing a lightweight concrete deck with excellent strength and quality, characterized by mixing in the weight part.