KR20110020573A - Light weight concrete pontoon reinforced with glass fiber reinforced plastic - Google Patents

Abstract

PURPOSE: A lightweight concrete pontoon reinforced with glass fiber reinforced plastic is provided to prevent a concrete structure from becoming deteriorated and to improve the stability of a structure. CONSTITUTION: A lightweight concrete pontoon reinforced with glass fiber reinforced plastic comprises a main body and a wall. The main body is made of a concrete material. The wall has a hollow formed inside the main body. The main body is composed of lightweight concrete(20) and a glass fiber reinforced plastic structure. The lightweight concrete is composed of lightweight concrete for low strength and lightweight concrete for high strength.

Description

Light weight concrete pontoon reinforced with glass fiber reinforced plastic}

The present invention relates to a pontoon for the efficient construction and management of coastal development, hydrophilic facilities and leisure facilities, and more particularly, by manufacturing pontoons using glass fiber reinforced framework and artificial lightweight aggregate, Since there is no rust to prevent deterioration of the pontoon structure, it can be installed regardless of places such as the beach, and it can be used for various forms by lightly weighting the structure so that it can be used for various forms of use. It is about.

In general, pontoons are installed to be used as a mooring place for ships, pedestrian crossings in boundary walls of aquatic leisure facilities, fish farms, fishing grounds, or other buildings, buried houses, pier, etc. To build the structure.

In this way, the pontoons are equipped with coastal areas such as coastal development, coastal development, expansion of island berthing facilities due to increase of sea volume, water structures due to increased leisure activities according to five days of work, and mooring facilities. Due to the increase in hydrophilic facilities and corporate farms, the demand for pontoons has increased significantly.

Pontoons are classified into synthetic pontoons using materials such as polyethylene (PE), expandable polystyrene (EPS), and concrete pontoons using reinforced frames and concrete, depending on the type of material used.

Synthetic resin pontoons are mainly installed in yacht marinas with good sleep conditions, such as yacht moorings, recreational facilities, fishing grounds, fish farms, etc.However, pontoons made of synthetic resin materials are vulnerable to safety and durability. It is insufficient, and environmental pollution such as floating pieces of styrofoam due to external impacts contaminate the water surface, which is a problem to install the above-mentioned synthetic resin pontoons in the sea of bad condition under the condition of installation of offshore structures or ocean waves. There is this.

Therefore, although reinforced concrete pontoons such as rectangular pontoons as shown in FIG. 1, elliptical pontoons as shown in FIG. 2, or streamline shape pontoons as shown in FIG. In the case of reinforced concrete pontoons, the color of the concrete is discolored due to rust caused by corrosion of the steel reinforcement embedded in the concrete, or the concrete structure and the rebar are peeled off, thereby deteriorating durability and causing water pollution due to rust. .

Therefore, as a way to solve the above problems, various pontoons have recently been developed and applied for a patent, and the injection molded into a synthetic resin as shown in Fig. 3 in Korean Patent Publication No. 0880853, the upper surface is an open body, The two side walls 7 facing each other are a concave-convex wall for male and female coupling, and the guide groove forming part 11 protrudes symmetrically from the inner wall surface so that the plate can be fitted in the vertical direction on the inner wall surface. At the corners, a support 15 formed with a connection hole 13 is integrally formed, and a body part 3 having several nut holes 17 is provided on an upper surface of the side wall 7, and the nut hole. Covered and fixed to the upper surface of the body portion 3 by a number of fastening bolts 25 screwed to each of the (17) to form a closed inner space, the nut hole along the edge ( The bolt hole 27 is perforated at a position corresponding to 17), and grooves 29 are provided along the bottom edge so as to be male and female with the upper end of the side wall of the body 3, and both edges of the upper surface are provided. The support plate 31 is vertically fitted to the lid portion 5 and the guide groove forming portion 11 which are installed upright, and partitions the inner space into three unit spaces, and is completely inserted so that the lower end is the body portion. The upper end is in contact with the bottom surface of the lid portion 5 in contact with the bottom plate of (3), and is repeatedly bent to increase the compressive strength, and has a concave-convex surface. 35 is perforated plate 33 and the lightweight block (9) of the EPS material fitted in the unit space and the bottom plate 21 or the lid portion 5 of the body portion (3) From more than one place of bottom The pontoon using the buoyancy buoyancy body is characterized in that it comprises a pressing piece 23 is formed protruding to be embedded in the lightweight block (9), the material of the pontoon in Korea Patent Publication No. 0836444 Polyaramid / Teflon Resin = 1/1/1 (Weight Ratio) Resin Mixture 90-100 parts by weight, Color Filler 4.5-5.5 parts, Color Polymer Beads 2.5-3.5 parts, Artificial Wood Pattern 0.5-1.5 parts, Artificial Marble It is made of 2.5 to 3.5 parts by weight, pontoons are known that characterized in that the shape of the pontoons meat cube, but the situation was not able to fundamentally solve the above problems.

The present invention as a way to solve the problems of the pontoons as described above as a structural material of pontoons, to improve the buoyancy by reducing the pontoon structure using artificial lightweight aggregates, and also as a skeleton of the structure instead of glass with strong corrosive steel By using glass fiber reinforced plastic (GFRP-bar) as an alternative frame, it is possible to prevent the reinforcing of reinforcing steel bars, especially in areas related to salt damage, and also to prevent deterioration of concrete structures, and to heavier general As it is a lightweight concrete that improves the shortcomings of concrete, it can be used in various forms such as arbitrary size and rectangular, streamlined, oval, etc., so it is expected to utilize coastal development, construction of hydrophilic facilities or efficient leisure facilities. The task is to provide concrete pontoons.

In addition, by producing a waterproof coating on the outside of the lightweight concrete pontoon structure produced using GFRP and artificial lightweight aggregate as described above, it is excellent in chemical resistance and corrosion resistance to prevent deterioration of the concrete structure, as well as aesthetics and environmental improvement as well as contact Another object is to provide a glass fiber reinforced lightweight concrete pontoon, which is characterized by the availability of various hydrophilic facilities.

Therefore, the pontoon of the present invention has excellent durability, low maintenance cost, and excellent workability. In addition, by using eco-friendly materials, there is no generation of contaminants, and the durability is improved due to low corrosiveness. As a result, it can be used for multi-purpose purposes such as aquaculture, leisure, anchoring, and floating houses, which are hydrophilic structures.

The present invention for achieving the above object in the pontoon made of a body of concrete material,

The main body is made of a wall formed with a hollow inside,

The main body is made of light-weight concrete and glass fiber-reinforced light-weight concrete pontoon, characterized in that made of glass fiber reinforced plastic frame therein as a means for solving the problem.

However, the lightweight concrete is divided into low-strength lightweight concrete and high-strength lightweight concrete according to the composition ratio of the light-weight concrete mixture, low-strength concrete in the present invention is 18MPa of concrete strength (f _ck ), high strength Lightweight concrete means that the strength (f _ck ) of the concrete is 27 MPa.

And the glass fiber reinforced plastic frame used in the present invention is characterized in that the glass fiber reinforced plastic frame of the bar (bar) formed with a spiral protrusion on the outer peripheral surface.

The present invention by the above-mentioned means for solving the above problem by using glass fiber reinforced plastic (glass fiber reinforced plastic) instead of the highly corrosive rebar as the skeleton of the artificial lightweight aggregate and pontoon structure, it is possible to secure the stability and high buoyancy of the skeleton, By making waterproof coating on the outside of pontoon structure, it is excellent in chemical resistance and corrosion resistance to prevent deterioration of concrete structure, and it is possible to secure various hydrophilic facilities through improvement of contact as well as improvement of aesthetics and environment. It is expected that it can be used for versatility, such as a floating house.

 Hereinafter, according to a feature of the present invention, in the pontoon made of a body of concrete material,

The main body is made of a wall formed with a hollow inside,

The main body relates to a glass fiber reinforced lightweight concrete pontoons, characterized in that made of lightweight concrete and glass fiber reinforced plastic frame therein.

Lightweight concrete in the present invention collectively referred to artificially produced fine aggregate and coarse aggregate to reduce the weight of the concrete, it is characterized by reducing the weight of the pontoon structure body.

And the lightweight concrete according to the present invention is designed by the combination of two types of low-strength lightweight concrete and high-strength lightweight concrete, depending on the composition ratio of the lightweight concrete mixture. In the present invention, the low strength concrete means that the strength (f _ck ) of the concrete is 18MPa, the light concrete for high strength means that the strength (f _ck ) of the concrete is 27MPa,

And the pontoon according to the present invention corresponds to two kinds of light weight aggregate concrete of the following [Table 2] according to the use of both light aggregates and coarse aggregates, in the present invention if the design reference strength is 18MPa [Table 2] In the present invention, a medium value is referred to as 'low strength', and in the present invention, when the design reference strength is 27 MPa, it is not limited in the following [Table 2]. For high strength '.

Low-strength lightweight concrete pontoons are mainly used for installation as a barrier wall of a water leisure facility, or as a footbridge for pedestrian farms and fishing grounds. 153 kg / m ³ , cement 305 ~ 310 kg / m ³ , fine aggregate 540 ~ 560 kg / m ³ , coarse aggregate is preferably composed of 590 ~ 610 kg / m ³ .

And light concrete pontoon is primarily won workpiece or water becomes used to the purpose of the apron, such as the installation or or vessel of water structures such as houses, concrete mixtures for high-strength water 170 ~ 180 kg / m ^3, the cement 370-380 for the high-strength It is preferable that the kg / m ³ , fine aggregate 500 ~ 510 kg / m ³ , coarse aggregate 590 ~ 610 kg / m ³ , silica fume (SF) 30 ~ 33 kg / m ³ It is preferable.

The low-strength concrete mixture and the high-strength concrete mixture are preferably mixed with 2 to 5% of the AE agent in the cement weight in the concrete mixture.

In the present invention, when the cement acts with water, it causes hydration to act through condensation and curing to give strength. If the mixing ratio of cement and water is out of the above-defined range, there is a concern that the strength of the cured concrete will be less than the design reference value.

And the lightweight aggregate used in the present invention is an artificial aggregate, which is typically used to lighten the weight of the concrete, improves the durability of the concrete, and serves to lighten the concrete structure. When the mixing amount of the coarse aggregate and the fine aggregate, which is a lightweight aggregate used in the present invention, falls below the range defined above, the effects of the effects described above may not be properly expressed, and the coarse aggregate which is the lightweight aggregate and If the mixing amount of the fine aggregate exceeds the range defined above, there is a fear that the strength of the cured concrete will be less than the design reference value.

In the case of coarse aggregate, which is a lightweight aggregate used in the present invention, it is the same as the shape of the photograph shown in FIG. 4, and in the case of fine aggregate, it is the same as the shape of the photograph shown in FIG. 5.

And the physical properties of the artificial light weight aggregate used in the present invention preferably has the physical properties as shown in the following [Table 1], the physical property value of the artificial light weight aggregate is not necessarily limited to the values defined in the following [Table 1] However, within the range similar to the physical property values defined below, it may be appropriately adjusted according to the needs of consumers or the needs of manufacturers.

Kinds importance Assembly rate Weight ratio Fine aggregate 1.92 2.66 1.92 Coarse aggregate 1.68 6.77 1.68

For reference, the design standard strength and the unit volume mass range of general lightweight concrete are manufactured based on the domestic concrete standard specification (2003) of [Table 2] below.

By used aggregate
Type of concrete Aggregate used Design standard strength
(MPa) Airborne units
Volume mass
(kg / m ³ ) Coarse aggregate Fine aggregate Lightweight aggregate concrete 1 type Lightweight
aggregate Sand, Crushed Fine Aggregate,
Blast furnace slag fine aggregate 15
21
24 1700-2000 2 kinds of lightweight aggregate concrete Lightweight
aggregate Replacing lightweight aggregate or part of lightweight aggregate with sand, crushed fine aggregate, blast furnace slag fine aggregate 15
18
21 1400-1700

And in the present invention, the properties required for the concrete used in the low-strength lightweight concrete pontoons and high-strength lightweight concrete pontoons are as shown in the following [Table 3], the physical properties required for the concrete must be below [Table 3 It is not limited to the value defined in the]], but can be appropriately adjusted according to the needs of the consumer or the manufacturer's needs within the range similar to the physical property values required for concrete as defined below.

division Coarse aggregate
Maximum dimension
(Mm) slump
(Cm) Air volume
(%) W / C
(%) Aggregate aggregate rate
S / a
(%) Low strength 15 12.0 5.5 49.35 42.55 High strength 15 12.0 5.5 43 42.55

The size of the coarse aggregate used in the present invention is 8 ~ 15mm, the size of the fine aggregate is preferably 2 ~ 5 mm.

In addition, silica fume (SF) used for high-strength lightweight concrete in the present invention is a mixed material which is mixed with concrete to improve the strength of concrete. The water permeability is small and the water tightness is improved, and the amount of heat generated at the beginning of hydration is small. It is preferable to use a high performance water reducing agent in combination with suppressing the temperature rise of concrete, increasing chemical resistance and reducing bleeding. In the present invention, when the mixed amount of silica fume (SF) is less than the range defined above, the effects of the above-described effects may not be expressed properly, and the mixed amount of silica fume (SF) is limited above. If the range is exceeded, there is a risk of exceeding the desired design reference value.

In addition, the AE agent used in the present invention is a admixture for evenly dispersing small bubbles in the concrete, and improves the durability of the concrete, and serves to improve the durability and watertightness against gas phase action. In the present invention, when the mixing amount of the AE agent is less than the range defined above, there is a concern that the effects of the effects described above may not be properly expressed, and when the mixing amount of the AE agent exceeds the range defined above. There is a risk of deviation from the desired design value.

And in the present invention, the skeleton of the pontoon lightweight concrete structure uses a bar-shaped GFRP formed with a spiral protrusion formed on the outer circumferential surface as shown in FIG. Therefore, the binding force with the light concrete is strengthened by the spiral protrusion formed on the outer circumferential surface of the bar (GFRP).

Frame fiberglass reinforced plastic (GFRP) used in the present invention is a material having both excellent corrosion resistance and high strength at the same time by using a glass fiber having excellent tensile strength as a composite material . The GFRP bar used in the present invention is generally required to have physical properties as shown in the following [Table 4], and the diameter of the GFRP bar used in the present invention is the diameter illustrated in [Table 4] below. It is not necessarily limited to, but may be appropriately adjusted according to the size and use of pontoons, the physical properties of glass fiber reinforced plastics are not necessarily limited to the values defined in [Table 4] below, and similar ranges to the physical properties defined below It can be adjusted appropriately according to the needs of consumers or the needs of manufacturers.

Diameter (mm) Modulus of elasticity
(MPa) Ultimate strength
(MPa) Strain
( E _fu ) φ9 41,000 1,020 0.0249 φ13 40,000 900 0.0225

The pontoon made of the light concrete and GFRP frame as described above is characterized by enhancing the durability of the concrete by preventing the brine from penetrating the inside of the pontoon structure by the general waterproof coating.

In the present invention, the waterproof coating treated on the outside of the pontoon is typically treated using an oil-based external water repellent waterproofing agent, a liquid permeable waterproofing agent, etc. which are waterproofing agents for waterproof coating on the exterior of the concrete structure.

Hereinafter, the present invention will be described in detail with reference to FIGS. 4 to 6, which are attached to preferred embodiments according to the present invention, and like reference numerals denote like elements for performing the same function in FIGS. 4 to 6. On the other hand, in the drawings and detailed description showing and referring to the configuration and operation easily understood by those skilled in the art from the general pontoons are briefly or omitted.

The pontoon according to the present invention is characterized in that the lightweight concrete using coarse aggregates and fine aggregates made of lightweight aggregates and glass fiber reinforced plastic frames therein.

In the present invention, Figure 4 is a photograph of artificial light aggregate of coarse aggregate used in the present invention, Figure 5 is a photograph of artificial light aggregate of fine aggregate used in the present invention, Figure 6 is a glass fiber used in the present invention The picture is taken of reinforced plastic frame.

In addition to the rectangular pontoon (rectangle pontoon) of the shape as shown in FIG. 1 and the elliptical pontoon or streamline shape pontoon of the shape as shown in FIG. Can be made into pontoons.

As an embodiment according to the present invention, for example, a rectangular pontoon, as shown in FIG. It is placed in the formwork, and then poured light concrete to produce a rectangular pontoon as shown in FIG.

In the present invention, Figure 7 is a photograph taken to reinforce the glass fiber reinforced plastic frame to produce a rectangular pontoon (rectangle pontoon) according to the present invention, Figure 8 is a form of a glass fiber reinforced plastic frame reinforced according to Figure 7 Figure 9 is a picture taken a state seated inside, Figure 9 relates to a picture taken a state of producing a rectangular pontoon (rectangle pontoon) according to the present invention.

As described above, the rectangular pontoon as shown in FIG. 9 according to the present invention has a main body made of a wall having a space 10 formed therein as shown in FIGS. 10 to 13, and the main body is made of lightweight concrete. 20 and the glass fiber reinforced plastic frame 30 therein. Therefore, the main body is lightweight concrete, light and durable, and the buoyancy is excellent due to the space formed therein. And by coating the FRP on the outside of the pontoon having such a structure to prevent the salt by seawater, etc. to penetrate the inside of the pontoon to prevent the deterioration of the concrete, the glass fiber reinforced plastic frame 30 to prevent corrosion of the durability of the pontoon It is characterized by being able to increase.

In the present invention, Figure 10 is a perspective view showing the internal structure of a rectangular pontoon (rectangle pontoon) according to the invention, Figure 11 is a front view of Figure 10, Figure 12 is a top and bottom view of Figure 10, Figure 13 is a side view of Figure 10 It is about.

As described above, the glass fiber reinforced plastic reinforcement lightweight concrete pontoon according to the preferred embodiment of the present invention is shown according to the above description and drawings, but this is only described for example and within the scope without departing from the spirit of the invention It will be understood by those skilled in the art that various changes and modifications are possible in the art.

1 is a perspective view showing the shape of a typical rectangular pontoon (rectangle pontoon),

Figure 2 is a perspective view showing the shape of a typical elliptical pontoon (elliptcal pontoon),

3 is a cross-sectional view of a pontoon using a conventional buoyancy buoyancy body,

Figure 4 is a photo taken of the artificial lightweight aggregate of coarse aggregate used in the present invention,

Figure 5 is a photo taken of the artificial light aggregate of fine aggregate used in the present invention,

Figure 6 is a picture taken a glass fiber reinforced plastic skeleton used in the present invention,

Figure 7 is a photo taken a state in which the glass fiber reinforced plastic skeleton to produce a rectangular pontoon (rectangle pontoon) according to the present invention,

FIG. 8 is a photograph showing a state in which the glass fiber reinforced plastic frame placed in the formwork is placed in accordance with FIG. 7;

Figure 9 is a photograph taken to produce a rectangular pontoon (rectangle pontoon) according to the present invention,

10 is a perspective view showing the internal structure of a rectangular pontoon in accordance with the present invention;

11 is a front view of FIG. 10,

12 is a top and bottom view of FIG. 10;

FIG. 13 relates to the side view of FIG. 10.

* Description of the symbols for the main parts of the drawings *

10: internal space 20: lightweight concrete

30: glass fiber reinforced plastic frame

Claims (7)

In the pontoon made of a concrete body, The main body is made of a wall formed with a hollow inside, The main body is lightweight concrete and glass fiber reinforced lightweight concrete pontoons, characterized in that made of glass fiber reinforced plastic frame therein. The method of claim 1, The lightweight concrete is glass fiber reinforced lightweight concrete pontoons, characterized in that divided into low-strength lightweight concrete and high-strength lightweight concrete according to the composition ratio of the light concrete mixture. 3. The method of claim 2, The low-strength lightweight concrete is a mixture of concrete made of 150 ~ 153 kg / m ³ , cement 305 ~ 310 kg / m ³ , fine aggregate 540 ~ 560 kg / m ³ , coarse aggregate 590 ~ 610 kg / m ³ Glass fiber reinforced lightweight concrete pontoons. 3. The method of claim 2, The high-strength lightweight concrete is a mixture of concrete 170 ~ 180 kg / m ³ , cement 370 ~ 380 kg / m ³ , fine aggregate 500 ~ 510 kg / m ³ , coarse aggregate 590 ~ 610 kg / m ³ , silica fume ( SF) Glass fiber reinforced lightweight pontoons, characterized in that consisting of 30 ~ 33 kg / m ³ . The method according to claim 3 or 4, The mixture of concrete is glass fiber reinforced lightweight concrete pontoons, characterized in that for mixing the mixture 2 to 5% by weight of 95 to 98% by weight of the concrete mixture. The method of claim 1, The glass fiber reinforced plastic frame is glass fiber reinforced plastic pontoons, characterized in that the glass fiber reinforced plastic frame of the bar (bar) form the spiral protrusion formed on the outer circumferential surface. The method according to any one of claims 1 to 6, The glass fiber reinforced lightweight concrete pontoons is a glass fiber reinforced lightweight concrete pontoons characterized in that the waterproof coating.

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