KR102525454B1 - Chopped and powdered carbon fiber reinforced material for asphalt mixtures and asphalt mixtures comprising the same - Google Patents

Abstract

The present invention relates to a carbon fiber reinforcing material for an asphalt mixture, an asphalt mixture containing the same, and a method for preparing the same and, more specifically, to a rod-shaped asphalt mixture durability reinforcing material obtained by simultaneously impregnating crushed carbon fiber bundles and pulverized carbon fiber powder with a recycled plastic resin and then performing molding, an asphalt mixture containing the same, and a method for preparing the same. The asphalt mixture durability reinforcing material obtained by simultaneously impregnating crushed and pulverized carbon fiber with a recycled plastic resin and performing molding according to the present invention is an asphalt mixture reinforcing material mixed with aggregates and a binder to yield an asphalt mixture, wherein the crushed carbon fiber bundles and the pulverized carbon fiber powder are impregnated with a thermoplastic recycled plastic resin and molded and cut to have the length of 12 to 15 mm and the diameter of 2 to 3 mm.

Description

Asphalt mixture durability performance reinforcing material formed by impregnating crushed and pulverized carbon fiber into recycled plastic resin, method for manufacturing the same, and asphalt mixture including the reinforcing material

The present invention relates to a carbon fiber reinforcing material for an asphalt mixture, an asphalt mixture containing the same, and a method for manufacturing the same, and specifically, a rod shape formed after simultaneously impregnating a crushed carbon fiber bundle and a pulverized carbon fiber powder into a recycled plastic resin. It relates to an asphalt mixture durability performance reinforcing material, an asphalt mixture including the same, and a manufacturing method thereof.

Asphalt pavement refers to road pavement covered with an asphalt mixture. Compared to cement concrete pavement, the adaptability to heavy vehicles is relatively low, and plastic deformation, cracks, and potholes often occur. In addition, there is a problem that the common life is short and frequent maintenance is required. However, asphalt pavement is used in many places such as urban roads due to the speed and simplicity of construction and low maintenance costs. Asphalt pavement accounts for more than 90% of road pavement.

In order to improve the lifespan of asphalt pavement and prevent cracks and plastic deformation of asphalt pavement, various methods are used. One of them is to use a high-viscosity asphalt binder modified with a polymer or to mix reinforcing fibers obtained by mixing two or more types of fibers selected from carbon fibers, glass fibers, aramid fibers, polyester fibers, and the like into an asphalt mixture. However, reinforcing fibers in which two or more types of heterogeneous fibers are mixed cause balling when producing an asphalt mixture, which is a problem in use.

Various methods have been proposed to solve this problem. Korean Patent Registration No. 10-1494799 separates a glass fiber fragment reinforcement in the form of pellets coated with a polypropylene envelope material on glass fiber fragments, and a fiber reinforcement having a rod shape by coating a polypropylene resin material on a new glass fiber bundle. , and discloses a technique for mixing into an asphalt mixture. In the case of glass fiber bundles, glass fiber rolls with a size of 2,400 to 5,400 TEX are continuously supplied in the long fiber-reinforced thermoplastic manufacturing process by the conventional LFT (Long Fiber-reinforced Thermoplastic) process. In the case of the inventive technology, there is a big difference in intermittently supplying carbon fibers previously crushed to a predetermined length and diameter and pulverized carbon fiber powder.

In addition, Korean Patent Registration No. 10-1659727 discloses pellets for modified asphalt by uniformly mixing one kind of inorganic continuous fiber and two kinds of inorganic pulverized fibers with a thermoplastic resin and extruding them in the form of two kinds of pellets, a rod form and an aggregate form. Discloses a technology for manufacturing.

However, the above-mentioned reinforcing materials of the registered patent are used by individually mixing two or more types of reinforcing materials. In this case, each reinforcing material must be individually injected and produced, and the amount of each reinforcing material is individually measured and used. However, since the process requires the use of a separate external input machine, the manufacturing process is complicated and the cost increases.

In the conventional asphalt mixture reinforcement technology using fibers, the length of the fibers used is 12 mm or more as a single type of long fiber, and the thickness of the fibers is relatively compared to the film thickness of the asphalt binder contained in the asphalt mixture, which is about 0.02 to 0.05 mm. It is at least 10 times thicker, so there are disadvantages in that the dispersion is not evenly distributed in the mixture, the fibers agglomerate, and the durability is lowered due to the generation of voids at the interface between the large-diameter fibers and the asphalt mixture after mixing the road pavement mixture.

In the case of the prior art, most of the examples are molded by impregnating long fibers in a roll form with plastic resin, and there is no example in which pulverized and crushed fibers are impregnated with recycled plastic resin as in the present invention.

As another method, there is a method in which geotextiles woven in a lattice form are laminated in the middle. As an example, Korean Patent Registration No. 10-1427375 suggests a breathable polyethylene film for asphalt pavement construction and an asphalt reinforcing material including the same, but requires a process of installing a separate lattice type reinforcing material during on-site construction, which is expensive. there is.

Korean Patent Registration No. 10-1494799 Korean Patent Registration No. 10-1659727 Korean Patent Registration No. 10-1427375

The present invention is intended to solve the above problems, while preventing plastic deformation, cracks, potholes, etc. of asphalt pavement, and impregnating crushed carbon fiber and pulverized carbon fiber powder into thermoplastic recycled plastic resin at the same time, Asphalt mixture reinforcing material that can be manufactured at low cost by injection molding in the form, it is easy to input reinforcing materials when producing asphalt mixture, and the thickness can be reduced by at least 10% due to the improved durability of asphalt mixture, which can also reduce construction costs. It is an object of the present invention to provide an asphalt mixture comprising a mixture and a manufacturing method thereof.

The asphalt mixture durability performance reinforcing material molded by impregnating the crushed and pulverized carbon fibers into recycled plastic resin according to the present invention

In the asphalt mixture reinforcing material mixed with the aggregate and the binder to constitute the asphalt mixture,

The shredded carbon fiber bundle and the pulverized carbon fiber powder are impregnated with thermoplastic recycled plastic resin, then molded and cut to have a length of 12 to 15 mm and a diameter of 2 to 3 mm.

In addition, the thermoplastic recycled plastic resin is composed of a mixture of polyethylene and low density polyethylene resin, and accounts for 43% by weight of the total weight of the asphalt mixture durability performance reinforcing material,

The shredded carbon fiber bundle has a length of 8 mm, a diameter of 0.1 mm, and a carbon fiber bundle accounting for 20% by weight of the total weight of the asphalt mixture durability performance reinforcing material, and a length of 15 mm and a diameter of 0.1 mm, 15% by weight relative to the total weight of the asphalt mixture durability performance reinforcing material. It is composed of a carbon fiber bundle that occupies

The pulverized carbon fiber powder has a diameter of 0.1 mm or less, and accounts for 22% by weight of the total weight of the asphalt mixture durability performance reinforcing material.

Asphalt mixture In the asphalt mixture in which the durability performance reinforcing material, aggregate and binder are mixed,

The asphalt mixture durability performance reinforcing material is characterized in that it accounts for 0.5 to 1.5% by weight based on the total weight of the asphalt mixture.

In the manufacturing method of the asphalt mixture durability performance reinforcing material,

A first step of preparing a first material, which is a carbon fiber bundle crushed to a length of 8 to 15 mm, and a second material, which is carbon fiber powder with a diameter of 0.1 mm or less,

A second step of drying the first and second materials with hot air;

A third step of melting the mixed thermoplastic recycled plastic resin;

A fourth step of preparing an impregnation composition by adding the first and second materials to the molten material;

A fifth step of manufacturing a carbon fiber reinforcing article by molding the impregnated composition by injection or extrusion;

A sixth step of cooling the carbon fiber reinforcement molded article molded in the fifth step and cutting it into a length of 12 to 15 mm and a diameter of 2 to 3 mm to manufacture a finished asphalt carbon fiber reinforcement product.

The rod-shaped carbon fiber reinforcing material impregnated with the crushed carbon fibers and powders of the present invention is obtained by impregnating the carbon fibers of the first and second materials into a resin composition prepared by mixing the crushed carbon fibers and carbon fiber powders in a thermoplastic resin in a constant ratio. It is molded in the form of a rod of the same size, and is mixed with the aggregate and asphalt binder in the asphalt production plant mixer. As it melts in the asphalt mixture, the reinforcing material is uniformly dispersed, improving the adhesion strength on the surface of the aggregate and increasing the toughness of the asphalt mixture. The durability of the mixture can be greatly increased.

In addition, since the rheological characteristics of the asphalt binder are improved by using carbon fibers with a diameter similar to the thickness of the asphalt film, the performance improvement effect is the complex shear constant (G*) value using a dynamic shear rheometer (DSR) In the case of general asphalt binders for road paving, a value of 1.0 kPa or more at a temperature of 64 degrees Celsius is used as a minimum standard. As a result of the experiment, the shear performance of 1.731 kPa at 64 degrees Celsius was expressed, showing the effect of improving the physical properties (properties that resist deformation) of general asphalt.

1 is a photograph of carbon fibers crushed to a length of about 8 mm to 15 mm and carbon fiber powder having a diameter of 0.1 mm or less, which is a source material according to the present invention.
2 is a view schematically showing a manufacturing process for manufacturing the asphalt reinforcing material of the present invention.
Figure 3 is produced by impregnating the first material bundle and the second material carbon fiber powder into a thermoplastic resin to form the inner and outer shells of the reinforcing material, and then cutting them into lengths of 10 to 30 mm and diameters of 2 to 3 mm. Represents a carbon fiber reinforcing material in the form of a rod.
4 is a photograph showing a state in which carbon fiber reinforcing fibers are dispersed after mixing the reinforcing material according to the present invention with an asphalt mixture.
5, 6, and 7 are Marshall stability test results for the asphalt mixtures of Comparative Examples and Examples.
8 is an indirect tensile strength test result for the asphalt mixtures of Comparative Examples and Examples.
9 is a dynamic rheological property test result for the asphalt binders of Comparative Examples and Examples.
10 is a perspective view of a mount according to the present invention.
Fig. 11 is an exploded perspective view of Fig. 10;
Fig. 12 is a sectional view of Fig. 10;

Hereinafter, with reference to the drawings, an asphalt mixture durability performance reinforcing material formed by impregnating crushed and pulverized carbon fibers according to the present invention into a recycled plastic resin, a manufacturing method thereof, and an asphalt mixture including the reinforcing material will be described in more detail.

Prior to a more detailed description of the asphalt mixture durability performance reinforcing material, its manufacturing method, and the asphalt mixture containing the reinforcing material, which are molded by impregnating the crushed and pulverized carbon fibers into recycled plastic resin according to the present invention,

Since the present invention can have various changes and various forms, the implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numeral, in particular, the same number of tens and ones digits, or the same reference numerals having the same tens digit, ones digit, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings Members indicated by reference numerals may be understood as members conforming to these standards.

In addition, the components in each drawing are expressed in exaggeratedly large (or thick) small (or thin) or simplified expressions in size or thickness in consideration of convenience of understanding, etc., but the scope of protection of the present invention is thereby limited. It shouldn't be.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~comprising~ or ~consisting of are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

As shown in the drawing, the asphalt mixture durability performance reinforcing material (hereinafter referred to as 'carbon fiber reinforcing material') formed by impregnating crushed and pulverized carbon fibers into recycled plastic resin according to the present invention includes a carbon fiber bundle (1) and carbon fiber powder (3) is produced by mixing and molding a thermoplastic resin.

1 shows a shredded carbon fiber bundle (1) of 8 to 15 mm, which is a by-product generated in the process of producing carbon fiber, and a carbon fiber powder (3) pulverized to a diameter of 0.1 mm or less. Through the manufacturing process of FIG. 2 for impregnating the carbon fiber source material into the thermoplastic resin, the carbon fiber reinforcing material 5 shown in FIG. 3 can be produced.

The shredded carbon fiber bundle (1), which is the first material of the present invention, has a length of 8 to 15 mm, a diameter of about 0.1 mm, and is composed of 10 or more individual carbon fiber strands with a diameter of 0.01 mm or less,

The second material, carbon fiber powder 3, is a material obtained by pulverizing the shredded carbon fiber bundle 1 to a diameter of 0.1 mm or less.

The carbon fiber can be obtained by carbonizing polyacrylonitrile fiber (PAN), and a first material in which the broken carbon fiber bundle (1) generated in the process of producing PAN carbon fiber is crushed to a length of 8 to 15 mm, A second material powdered to a diameter of 0.1 mm or less is used.

The carbon fiber is a fiber having a melting point of 1,800 degrees Celsius or more and a diameter of 1,200 to 2,400 TEX, a specific gravity of 1.8 to 2.0, a tensile strength of 2,500 MPa or more, and a tensile modulus of 300 to 600 GPa.

The first material of the shredded carbon fiber bundle (1) and the second material of the carbon fiber powder (3) are impregnated with a thermoplastic resin, and the impregnated composition is molded through an injection nozzle to a length of 10 to 30 mm, preferably an aggregate diameter size. About 1.2 to 1.5 times, that is, when the sieve size is 10 mm below the maximum particle diameter of the nominal aggregate, it is cut to a length of around 12 to 15 mm and a diameter of 2 to 3 mm to produce rod-shaped carbon fiber reinforcement (5) do.

The plastic resin may include recycled polyethylene and low-density polyethylene alone or in a ratio of 6:4, and the polyethylene preferably has a melting point of 120 to 130°C, and the low-density polyethylene preferably has a melting point in the range of 110 to 120°C. More preferably, polyethylene having a melting point of 120°C or less and low density polyethylene may be mixed in a ratio of 6:4, and the viscosity of the mixed resin is maintained at 1.0 Pa.s or less at 135°C.

According to an embodiment of the present invention, the carbon fiber powder 3 impregnated in the plastic resin may have a viscosity of 2.0 Pa.s or less at 135 ° C. The industrial by-product powder may be at least one of Calpet having a calcium carbonate content of 70% by weight or more, fly ash having a silicon (SiO ₂ ) content of 40% by weight or more, and reject ash. The carbon fiber powder (3) or industrial by-product powder has a particle size distribution residual ratio of at least 20% by weight or more for the 75 μm sieve and 10 wt% or less for the 45 μm sieve. Adopting carbon fiber powder or industrial by-product powder it is desirable

The carbon fiber reinforcing material (5) of the present invention includes 40 to 45% by weight of thermoplastic resin, 30 to 35% by weight of shredded carbon fiber bundle (1), and 15 to 25% by weight of carbon fiber powder (3) or industrial by-product powder it is desirable

If the plastic resin content is less than 40% by weight, it is difficult to form the inner shell during injection molding and impregnation, and if the plastic resin content exceeds 45% by weight, the weight parts of the first and second carbon fiber materials are reduced. The effect of improving physical properties of the asphalt mixture containing 1.5% by weight of the carbon fiber reinforcing material 5 is lowered.

Referring to FIG. 2, a method for manufacturing a carbon fiber reinforcing material according to the present invention includes a first step of crushing and pulverizing carbon fibers and cutting them, a second step of hot air drying the cut carbon fibers, and hot air dried carbon fibers. It consists of the third to sixth steps of shaping and cutting after impregnating the plastic resin.

The asphalt carbon fiber reinforcing material 5 of the present invention can be manufactured by the following extrusion or injection molding method.

In the first step, a first material, which is a carbon fiber bundle (1) crushed to a length of 8 to 15 mm, and a second material, which is carbon fiber powder (3) with a diameter of 0.1 mm or less, are prepared.

In the second step, the first and second materials are dried with hot air.

In the third step, the mixed thermoplastic recycled plastic resin is put into an extrusion mold or an injection mold and melted at 160 to 230 ° C.

In the fourth step, an impregnation composition is prepared by adding the first material and the second material to the melted material of the thermoplastic resin.

In the fifth step, the impregnating composition is molded by injection or extrusion to produce a molded product of the carbon fiber reinforcing material 5.

In the sixth step, the finished product of the asphalt carbon fiber reinforcing material 5 is manufactured by cooling the molded product of the carbon fiber reinforcing material 5 and cutting it into pieces having a length of 12 to 15 mm and a diameter of 2 to 3 mm.

Figure 2 schematically shows an embodiment of the configuration of a manufacturing apparatus for producing a carbon fiber reinforcing material 5 of the present invention, the carbon fiber reinforcing material 5 manufacturing apparatus melts the plastic resin and transfers it through a screw A melter 11, an impregnation tank 13 in which the first material and the second material are impregnated into the molten material of plastic resin to make an impregnation composition, and a carbon fiber reinforcing material (5) by injection molding or extrusion molding of the impregnation composition. ) It includes a molding machine 15 for manufacturing a molded product, and a cutting machine 17 for manufacturing a carbon fiber reinforcing material 5 finished product by cutting the molded product after cooling it.

Equipment such as the melting machine 11, molding machine 15, and cutting machine 17 generate vibration and noise when driven. Vibration causes product failure and shortens the life of these equipment, and noise can cause civil complaints.

Accordingly, the present invention reduces vibration and noise by installing these devices on a mounting table 100 having excellent shock absorption performance.

A detailed description of the mount 100 will be described later.

The composition of a general ductile asphalt concrete road pavement mixture consists of 5 to 6% by weight of an asphalt binder and 94 to 96% by weight of an aggregate, and other reinforcing materials are controlled in the range of 0.1 to 2% by weight.

The asphalt binder in the composition provides stability of the mixture and an effect of developing adhesion between aggregates, and the durability of the mixture is greatly influenced by the adhesion performance of the asphalt binder.

A method for evaluating the physical performance of an asphalt binder having multiple viscoelastic and elastic properties according to temperature change is measured by the ratio of the complex shear modulus (G*) value and the phase coefficient (Sinδ) using a dynamic rheological property tester (Dynamic Shear Rheometer) In the case of general asphalt binders for road pavement, a value of 1.0 kPa or more at a temperature of 64 degrees Celsius is used as a minimum standard.

If the performance is insufficient at the above temperature, or in order to express the required performance above the above temperature, it is necessary to improve the viscosity of the asphalt binder itself. It is also used by improving the performance so that the adhesive performance exceeds the above 1.0 kPa under the temperature condition of 70 to 82 degrees by modifying by weight part.

However, when reforming asphalt, a lot of heat energy is consumed, 1.5 times more carbon dioxide is generated compared to general mixtures, mechanical energy is consumed during mixing, phase separation problems during long-term storage, problems with early loss of elastic function due to dissociation of polymer network structure in the presence of unsaturated double carbon bonds, There are disadvantages such as cost at least 1.5 times higher.

Asphalt binder is a hydrocarbon-based thermoplastic mixture composed of 70 to 85% carbon, 7 to 12% hydrogen, and other compounds such as nitrogen (N) and sulfur (S), which are composed of asphaltene, resin, and oil. It consists of a complex composition of polar and non-polar molecules such as (oil). At this time, the component exhibiting the adhesive performance is a resin component, and has a base on which the adhesive performance is expressed by mechanical bonding on the surface of the aggregate when combined with the aggregate.

The present invention utilizes a reinforcing material in which crushed carbon fiber and pulverized carbon fiber powder (3) are impregnated with recycled plastic resin with a carbon fiber reinforcing material (5) content of 0.5 to 1.5% by weight relative to the weight of the asphalt mixture without the expensive polymer modification. Therefore, by increasing the adhesive surface due to the increase in the specific surface area of the carbon fiber powder (3) powdered to a diameter of 0.1 mm or less, (1) overcoming the disadvantages of the asphalt binder, and 8 to 15 mm length contained in the reinforcing material (2) It is meaningful in improving the strength of the asphalt mixture itself and the durability stability of the mixture.

The carbon fiber reinforcing material 5 prepared as described above is mixed with the aggregate and the asphalt binder in an asphalt mixture plant mixer to form an asphalt mixture. The carbon fiber reinforcing material 5 may be included in an amount of 0.5 to 1.5% by weight based on the total weight of the asphalt mixture.

The aggregate may be sand, crushed stone, gravel, etc., and is not particularly limited. The content of the aggregate in the asphalt mixture may be 50 to 98% by weight, preferably 80 to 95% by weight, based on the total weight of the mixture. The thickness of the aggregate is not particularly limited, but it is preferable to have an aggregate particle size distribution in which the maximum size of the coarse aggregate is 10 to 40 mm at most and the pass rate of the 2.5 mm (No. 8) sieve is 7 to 65% by weight.

As the asphalt binder, straight asphalt, blown asphalt, and the like may be used, and is not particularly limited. The asphalt binder may be 1 to 30% by weight, preferably 5 to 6% by weight, based on the total weight of the asphalt mixture.

In the process of manufacturing the asphalt mixture, after performing the dry mixing step for 15 to 20 seconds in which the carbon fiber reinforcement (5) and the aggregate are heated and mixed at a temperature of 170 to 180 ° C, the asphalt binder is mixed in the above weight ratio and mixed at a temperature of 170 to 180 ° C It is desirable to perform stirring for 25 to 30 seconds at .

Since the melting point of the thermoplastic resin of the carbon fiber reinforcing material (5) of the present invention is lower than the mixing temperature of the asphalt mixture plant, the coating layer of the carbon reinforcing material is melted during the mixing process, and the crushed carbon fibers and the carbon fiber powder (3) are mixed with the asphalt mixture. will be distributed in Since the polyethylene resin melts even at a relatively low temperature, the cost of preparing the asphalt mixture is lower than that of using a thermoplastic resin having a high melting point such as polypropylene, and thus the economical efficiency is excellent.

Hereinafter, the present invention will be described in detail by way of examples.

Example

The durability of the asphalt mixture including the carbon fiber reinforcing material (5) prepared in the present invention was evaluated. Specimens of an asphalt mixture containing the asphalt reinforcing material, fine aggregate, coarse aggregate, stone powder filler, and asphalt binder of the present invention in the contents shown in Table 1 below were prepared, and Marshall stability test, indirect tensile strength test, and coin for durability evaluation were performed. Dan (Dynamic Shear Rheometer) test and the like were conducted.

division aggregate
content
(wt%) stone dust filler
content
(wt%) asphalt binder
content
(wt%) Reinforcement content
(wt%) Comparative Example 1 (general) 93.0 1.8 5.2 0 Comparative Example 2 (glass fiber) 93.0 1.8 5.2 1.0 Example (carbon fiber) 93.0 1.8 5.2 1.0

Comparative Example 1 is a commonly used asphalt mixture, Comparative Example 2 is a glass fiber reinforced mixture presented in Korean Patent Registration No. 10-1494799, and in the case of Examples, the carbon fiber reinforcing material of the present invention ( 5) was added at 1.0% by weight.

As shown in FIG. 4, it can be seen that the reinforcing fibers (carbon fibers) of the asphalt reinforcing material were well dispersed after the usual mixing process after the input of the asphalt reinforcing material.

As a result of the relative comparison test of FIGS. 5, 6, and 7, the durability performance value according to the average Marshall's degree of the asphalt mixture of Examples including carbon fiber reinforcing materials was about 1.4 times that of Comparative Example 1 (general) and Comparative Example 2 (glass fiber reinforcement) was confirmed to be improved by more than 1.3 times.

8 is an indirect tensile strength test, confirming that the durability performance value by average indirect tensile strength of the asphalt mixture of Example including the carbon fiber reinforcement was improved by about 1.2 times or more compared to Comparative Example 1 (general), and the porosity of the carbon fiber reinforcement mixture It can be seen that the average strength development of 2.11 MPa was greater than that of this comparative example.

9 is a dynamic rheological property test result. As a result of the DSR experiment by adding a small amount of carbon reinforcing material at 1.5% by weight relative to the weight of the asphalt binder, a shear performance of 1.731 kPa was expressed at 64 degrees Celsius, showing the physical properties of general asphalt (resistance to deformation properties) to show the effect of improving

As described above, FIGS. 10 to 12 show a mounting table 100 on which equipment such as the melting machine 11, molding machine 15, and cutting machine 17 is installed, and the impact applied to the mounting table 100 is shown. A shock dissipation means is provided to disperse and increase buffering efficiency. In the drawings, the components are shown somewhat exaggerated (different from actual dimensions) so that it is easy to understand the configuration and structure of the mounting table equipped with the impact dispersing means and the operating mechanism.

The mounting table 100 includes a floor plate 110 placed on the floor, a buffer plate 120 disposed on the floor plate 110 and on which equipment is placed, and various places between the floor plate 110 and the buffer plate 120. A buffer spring 130 is interposed therebetween to absorb shock applied to the buffer plate 120.

Impact generated when the equipment installed on the buffer plate 120 is driven is generally concentrated on a specific part. That is, the shock caused by the operation of the equipment is often concentrated on a specific part of the buffer plate 120 rather than being uniformly distributed throughout the buffer plate 120 . When the shock applied to the buffer plate 120 is concentrated on a specific part, the buffer plate 120 is tilted by the impact, and when the buffer plate 120 is tilted, the shock absorption efficiency is lowered, and the tilted buffer plate 120 is restored to its original position In the process of being tilted in the opposite direction, repeated shaking occurs, and the equipment is pushed and moved on the inclined buffer plate 120 to further reduce the shock absorption efficiency and make the inclination of the buffer plate 120 more severe.

In the present invention, even when an impact is applied to a specific part of the buffer plate 120, the shock absorber 120 is moved only in the vertical direction without tilting, so that the impact applied to the buffer plate 120 is reduced by introducing an impact dispersing means. While uniformly distributed throughout the buffer plate 120, the above problems are solved.

The impact dispersing means includes a rotating plate 140 rotatably provided on the bottom plate 110, a plurality of first inclined blocks 150 provided on the rotating plate 140 and having an inclined surface 151 formed thereon, and , A plurality of second inclined blocks 160 having corresponding inclined surfaces 161 in contact with the inclined surface 151 formed at the lower part of the buffer plate 120 and formed on both sides of the first inclined block 150 It includes a slide rail 153 and a slide roller 163 provided on both sides of the second inclined block 160 and inserted into the slide rail 153 to move along the slide rail 153.

A bearing rotatably coupled to the rotating shaft 111 provided at the center of the bottom plate 110 is provided at the center of the lower surface of the rotating plate 140, and the rotating plate 140 is rotatably coupled to the upper surface of the bottom plate 110. ) It may be desirable to have a plurality of rotating balls or rotating rollers so that the rotation is made smoothly.

Guide holes 113 and guide pins 123 are provided at the corners of the bottom plate 110 and the buffer plate 120 to guide the lifting and lowering of the buffer plate 120, and the spring 130 passes through the rotating plate 140. A light through hole 141 having a round shape is formed.

When an impact is applied to a specific part of the buffer plate 120 and the part is pressed, the second inclined block 160 close to the impact part descends and the corresponding inclined surface 161 of the second inclined block 160 moves to the first inclined block While moving along the inclined surface 151 of (150), the first inclined block 150 is pushed, and the rotating plate 140 rotates accordingly. When the rotary plate 140 rotates, the sliding rollers 163 provided on all the second inclined blocks 160 pull down their second inclined blocks 160 while moving along the restrained sliding rails 153. The buffer plate 120 is lowered.

As such, the shock dispersing means allows all of the second inclined blocks 160 to be simultaneously pulled down when an impact is applied to any part of the buffer plate 120, so that the buffer plate 120 moves downward without inclination. It is moved, and even when it is restored to its original position, it is moved upward without inclination.

In the above description of the present invention, with reference to the accompanying drawings, an asphalt mixture durable performance reinforcing material formed by impregnating crushed and pulverized carbon fibers having a specific shape and structure into recycled plastic resin, a method for manufacturing the same, and asphalt including the reinforcing material Although the mixture has been described, the present invention is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as belonging to the protection scope of the present invention.

1: carbon fiber bundle 3: carbon fiber powder
5: carbon fiber reinforcement 11: melter
13: impregnation tank 15: molding machine
17: cutter 100: installation stand
110: bottom plate 120: buffer plate
130: buffer spring 140: rotating plate
150: first company block 153: slide rail
160: second inclined block 163: sliding roller

Claims (5)

As an asphalt mixture durability performance reinforcing material mixed with aggregate and binder,
Asphalt formed by impregnating the shredded carbon fiber bundle and the pulverized carbon fiber powder into a thermoplastic recycled plastic resin, then molding and cutting, and impregnating the crushed and pulverized carbon fibers having a length of 12 to 15 mm and a diameter of 2 to 3 mm into the recycled plastic resin. In the mixture durability performance reinforcing material,

The thermoplastic recycled plastic resin is composed of a mixture of polyethylene and low-density polyethylene resin, and accounts for 43% by weight of the total weight of the asphalt mixture durability performance reinforcing material,
The shredded carbon fiber bundle has a length of 8 mm, a diameter of 0.1 mm, and a carbon fiber bundle accounting for 20% by weight of the total weight of the asphalt mixture durable performance reinforcing material, and a carbon fiber bundle having a length of 15 mm and a diameter of 0.1 mm, 15% by weight relative to the total weight of the asphalt mixture durability performance reinforcing material. It is composed of a carbon fiber bundle that occupies
The pulverized carbon fiber powder has a diameter of 0.1 mm or less, and the asphalt mixture durability performance reinforcing material is molded by impregnating the crushed and pulverized carbon fiber, characterized in that it accounts for 22% by weight relative to the total weight of the asphalt mixture durability performance reinforcing material . delete According to claim 1,
Further comprising a mounting table on which equipment for shaping and cutting the asphalt mixture durability performance reinforcing material is installed,
The mounting base includes a floor plate placed on the floor, a buffer plate disposed on the floor plate and on which the equipment is placed, a buffer spring interposed in places between the floor plate and the buffer plate to absorb shock applied to the buffer plate, and the buffer plate It includes an impact dispersing means for uniformly distributing the applied impact to the entire buffer plate,
The impact dispersing means includes a rotary plate rotatably provided on the bottom plate, a plurality of first inclined blocks provided on the rotary plate and having an inclined surface formed thereon, and a corresponding inclined surface provided on the buffer plate at a lower part contacting the inclined surface. A plurality of second slope blocks formed thereon, slide rails formed on both sides of the first slope block, and slide rollers provided on both sides of the second slope block and inserted into the slide rail to move along the slide rail Asphalt mixture durability performance reinforcing material formed by impregnating crushed and pulverized carbon fibers into recycled plastic resin, characterized in that it comprises. In the asphalt mixture in which the asphalt mixture durability performance reinforcing material according to claim 1, the aggregate and the binder are mixed,
The asphalt mixture durability performance reinforcing material is an asphalt mixture, characterized in that it accounts for 0.5 to 1.5% by weight relative to the total weight of the asphalt mixture. In the manufacturing method of the asphalt mixture durability performance reinforcing material according to claim 1,
A first step of preparing a first material, which is a carbon fiber bundle crushed to a length of 8 to 15 mm, and a second material, which is carbon fiber powder with a diameter of 0.1 mm or less,
A second step of drying the first and second materials with hot air;
A third step of melting the mixed thermoplastic recycled plastic resin;
A fourth step of preparing an impregnation composition by adding the first and second materials to the molten material;
A fifth step of manufacturing a carbon fiber reinforcing article by molding the impregnated composition by injection or extrusion;
A sixth step of cooling the carbon fiber reinforcement molded product molded in the fifth step and cutting it into a length of 12 to 15 mm and a diameter of 2 to 3 mm to prepare a finished asphalt carbon fiber reinforcement product; manufacturing method.

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