JP4026268B2 - Waste FRP crushed material and cement material, concrete member or resin member containing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an FRP pulverized material suitable for recycling FRP waste collected from the market and a method for producing the same, and a molded product containing the pulverized material and a method for producing the same.
[0002]
[Prior art]
FRP has been widely used in the sports field, aircraft field, automobile field, and other general industrial fields because of its light weight and high durability. However, with the growing interest in environmental issues, the recycling law becomes important. ing.
[0003]
Conventional methods for recycling waste FRP include thermal recycling methods that use pulverized and increased surface area to burn and use as a heat source, and only reinforcing fibers that have been shortened by pulverizing and melting only the resin. There is a known method of material recycling by taking it out. However, according to these conventional recycling methods, waste FRP is subjected to a pulverization process and a heating process, and therefore, it undergoes a processing process that consumes a large amount of energy in excess of molding FRP. It is not supposed to solve environmental problems. In the process of pulverizing and finely pulverizing the FRP, the pulverization process is repeated until the size becomes several hundred μm or tens of μm or less, so that a large amount of energy is consumed and a low energy recycling method that can be recycled without pulverization has been demanded .
[0004]
The reason why the FRP is finely pulverized is thought to be to improve the added value of the mechanical properties of the base material when the pulverized product is mixed with other base materials such as cement and resin. Compared with, the labor required for pulverization is much larger, and it is not a technology that can withstand practical use as a recycled product that is forced to be economical.
[0005]
On the other hand, the crushing process is known as a pre-crushing process, but there is no idea that a recycled product with utility value can be produced at the level of the crushed material without much effort, and it is further advanced and discarded at the crushing stage. No attempt has been made to control the shape or dimensions of the FRP.
[0006]
Among FRP members, sports equipment is fashionable and is collected from the market in a shorter cycle than aircraft members, so there is an urgent need for technology that can reuse FRP waste sports members with a small amount of energy. The current situation is.
[0007]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that the input energy required for recycling the above-mentioned waste FRP is made smaller than before, and even when mixed in a base material such as cement or resin, the mechanical properties are not impaired, and The purpose is to provide practical recycled products that are economical (cost competitive).
[0008]
That is, an object of the present invention is to provide a technique for recycling the above-described waste FRP at a low cost, a member containing a recycled product, and a manufacturing method thereof.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a constant direction diameter of 3 mm or more and a minimum curvature radius of 150 mm or less. A waste FRP crushed material that is a waste FRP crushed material that has a filling rate within a range of 0.2 to 0.7 when only the waste FRP crushed material is assembled. provide.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of this invention Based on Will be described in detail. The crushed material of the present invention is used for the impact force, tearing force, tensile force, shearing force, compressive force, thermal stress, electromagnetic force, etc. of the cured FRP waste made of reinforcing fiber and resin recovered from the market or production process. It is characterized by being crushed into a curved shape. Since the crushed material has a bend, the crushed material interferes with each other, and the porosity described later increases, and when mixed into cement or resin, the weight becomes light, and the cement and resin are easily impregnated with high strength. Become. Furthermore, since the crushed materials are intertwined with each other, it is possible to exhibit a mode in which they are not easily separated even after a crack has occurred in cement or resin.
Further, there are effects such as excellent mechanical properties not only in the in-plane direction but also in the thickness direction. Furthermore, since the shape can be stably maintained three-dimensionally, there is no problem that the pulverized product settles in the base material at the time of molding, which is likely to occur with a fine pulverized product. Furthermore, it is suitable for manufacturing a member having a gap by utilizing the porosity.
[0012]
First, the curled waste FRP crushed material of the present invention is manufactured by, for example, a single device or a plurality of device groups for fragmenting hardened fiber reinforced plastic (hereinafter abbreviated as FRP) made of reinforcing fibers and resin. Can do.
[0013]
Specific equipment includes shredders, crushers such as joke crushers, gyrate crushers, cone crushers, crushers such as hammer crushers, roll crushers, roll mills, stamp mills, edge runners, cutter mills, rod mills, etc. Examples include self-pulverizers such as medium crushers, erotic fall mills and cascade mills. In order to produce a crushed material having a bend according to the present invention, it is preferable that a compression impact force and a tearing force act in the crushing mechanism. Rather than using a grind or a shearing blade having a sharp cutting edge, it is preferable to coarsely crush with a rotating blade having a dull edge (roundness radius of the cutting edge of 0.5 mm or more) that contacts the crushed material over a relatively large area. When crushing, it is also preferable to crush in water or a high-humidity atmosphere in order to suppress scattering of the crushed powder, or to suppress the effects of heating, sparks, and static electricity. In order to obtain a crushed material having a bend, it is also effective to crush simultaneously with a material softer than FRP, such as cloth, plastic, or rubber material.
[0014]
At the time of crushing, it is impossible to obtain only a crushed material with a bend, and therefore a sorting device using a sieve, wind power, hydraulic power, etc. can be used to extract a crushed material having a curvature from the crushed material. Of course, as will be described later, the crushed material of the present invention and other shapes of pulverized material may be mixed into cement or resin without passing through the sorting step.
[0015]
The reason why the FRP must be a cured product is that the crushed material is likely to have the above-described bent shape by the fragmentation or crushing process. In the uncured material state, the reinforcing fiber can move freely, so it is difficult to tear and break, and even if it can be broken, it cannot hold the three-dimensional shape like the hardened crushed material of the present invention. . In addition, the uncured resin may make the function of the apparatus impossible by fragmentation or adhering to the inside of the crushing apparatus.
[0016]
The determination of whether the waste FRP is cured can be determined by DSC. A desirable degree of curing that facilitates fragmentation is 60% or more. It is also preferable to incorporate a pre-process for accelerating curing into the fragmentation device. Specific examples of the curing acceleration method include heating, electron beam irradiation, and addition of a curing agent.
[0017]
Examples of typical shapes of the crushed material of the present invention include shapes such as a crescent shape in FIG. 1, a coil shape in FIG. 2, an S shape in FIG. 3, and a multileaf shape in FIG. The criterion for quantitatively determining whether or not there is a bend is determined by the size of the minimum radius of curvature (see FIG. 1), and the preferred bend size in the present invention is: Minimum song The modulus radius is 150 mm or less, more preferably 100 mm or less. In some cases, there are fine hairs or protrusions of reinforcing fibers or matrix resin on the surface, and it may be difficult to determine which part defines the minimum radius of curvature. In addition, defining the minimum radius of curvature with a portion that is too small does not conform to the actual situation. Therefore, in the FRP particle, it is practical to measure the radius of curvature only for a portion where the thickness (see FIG. 1) is 0.5 mm or more and define the minimum radius of curvature. When the minimum radius of curvature is less than or equal to the upper limit of this range, crushed materials interfere with each other, increasing the porosity described later, and when mixed with cement or resin, the weight becomes light and at the same time cement and resin Easy to impregnate and high strength. Furthermore, since the crushed materials are curled, they are intertwined with each other, so that they do not easily separate even after cracks are formed in the cement or resin. The radius of curvature can be obtained, for example, by taking a photograph of a crushed material with an optical microscope and processing it as a two-dimensional image. There is also an idea of counting only the FRP pulverized product within the radius of curvature and defining the volume% of the FRP pulverized product based on the total volume. However, as described below, the concept of defining the curvature radius by the volume average curvature radius is more precise.
C _v = Σ (Vi · Ci) / Σ (Vi)
(C _v : Volume average radius of curvature, Ci: radius of curvature of i th crushed material, Vi: volume of i th crushed material)
As for the size of the pulverized product of the present invention, the fixed direction diameter is preferably 3 mm or more, more preferably 7 mm or more. If it is smaller than the lower limit of the above range, there is a possibility that the crushed materials will be intertwined with each other or contact each other and repel each other, and there is a possibility that they will interfere with each other, and the strength improvement will be insufficient.
[0018]
The fixed-direction diameter is based on the assumption that the pulverized material is randomly distributed on the plane, and the dimensions in a certain direction are measured (see Chemical Engineering Handbook 5th Edition, p. 219) In the present invention, 100 cm ² Obtained using the cross-sectional area of
A mesh or sieve is used to classify the crushed material. An automatic sorter using wind, hydraulic power, magnetic force, eddy current, floating, light, etc. can be used.
[0019]
In addition, the filling rate (a value obtained by subtracting the porosity from 1) when only the crushed materials having a bend are assembled is within a range of 0.2 to 0.7. And need. When the value falls below the lower limit of this range, the number of crushed materials that interfere with each other is small, and the cement and the resin material containing them are easily separated after the maximum load. If the upper limit of this range is exceeded, the crushed materials are in contact with each other rather than entangled, and the strength of the cement or resin material mixed with the crushed materials may not improve as expected. More preferably, it is 0.3-0.6. In addition, in the case of mixing in cement or resin material in relation to the filling rate, a conventional pulverized material may be mixed in addition to the crushed material of the present invention.
[0020]
Next, the waste FRP in the present invention is a glass used for sports equipment such as tennis rackets, golf shafts, fishing rods, transportation equipment members such as automobiles and airplanes, building parts such as bath tubs and wall materials, etc. Various types of reinforcing fibers such as carbon, pulp, tetron, nylon, vinylon, acrylic, aramid, modacrylic, alumina, silicon nitride, etc., thermosetting epoxy resin, unsaturated polyester resin, phenol resin, benzoxazine resin, vinyl ester resin, etc. Or thermoplastic resins such as polyethylene, polypropylene resin, polyamide resin, ABS resin, polybutylene terephthalate resin, polyacetal resin, polycarbonate, etc., and modified resins obtained by alloying these resins, elastomers such as rubber, etc. I covered yuwayu Is that of waste plastic. Since it is covered with resin, it can be made a member with good adhesion and high strength with cement and resin material.
[0021]
The crushed material of the present invention is low cost because it uses waste FRP as a starting material and does not separate the resin and the fiber, so the separation cost is unnecessary, and the cement or resin member containing the crushed material The cost can be reduced to a practical level. In particular, in the present invention, since the input energy required for crushing is small, the recycling method has an extremely low environmental load.
[0022]
Next, among waste FRP, cylindrical waste plastics such as golf shafts, fishing rods, rolls, propeller shafts, truss tubes, etc. are preferred because the crushed material tends to be bent. Moreover, since the thermoplastic resin waste FRP has high toughness, it is easy to form a bent shape.
[0023]
Among the FRPs, FRPs containing carbon fibers are preferred because they are excellent in alkali resistance and can maintain strength over the long term. There are PAN-based and pitch-based carbon fibers, but both are preferable, but PAN-based high-strength fibers (elastic modulus is 200 GPa to 800 GPa, strength is 2500 MPa to 10 GPa) are preferable in order to have bending when crushing. . In the case of mixing with cement, it is particularly preferable that the elastic modulus is in the range of 200 GPa to 400 GPa because the difference in elastic modulus from cement is reduced, strain concentration is eliminated, and cold resistance and frost damage resistance are improved. When organic fibers such as an aramid fiber and a polytylene fiber are contained, since the fibers exhibit a fibril shape during crushing, the crushed materials interfere with each other.
[0024]
As the resin, epoxy resins, polyester resins, vinyl ester resins and modified resins of these resins that are excellent in alkali resistance are preferable. Epoxy resins are most preferred because of their excellent adhesiveness.
[0025]
Next, the crushed material of the present invention can be used by being mixed with, for example, cement, concrete, or resin.
[0026]
As a molding method of the cement material, a known molding method such as a molding method poured into a mold or a spray molding method can be used. When there is a need to disperse the crushed material uniformly, casting molding is preferable, and spraying molding is preferable for workability.
[0027]
In the case of cement, as described above, the waste FRP crushed material having a bend is evenly distributed three-dimensionally in the cement, so that the cement material can have high strength also in the thickness direction. In addition, the cement material is divided at a low strain, but by mixing the crushed material of the present invention, it is possible to exhibit a mode in which the load is borne without being divided even after a crack is generated in the cement.
[0028]
As the concrete cement, any known cement can be used. For example, ordinary portland cement, early-strength cement, moderately hot portland cement, various portland cements such as sulfate-resistant portland cement, white cement, alumina cement, slag cement, silica cement, fly ash cement, roman cement, natural cement, blast furnace cement, Special cements such as fine particle cement and foam cement. It is also possible to use a mixture of two or more types of cement.
[0029]
Further, in addition to the FRP crushed material of the present invention, the cement may be added with a pulverized material / powder material made of waste FRP generated during the production of the crushed material of the present invention or a lightweight aggregate generally mixed in the cement material. Is possible. Specifically, silica sand, sand, gravel, fly ash, shirasu balloon, perlite, glass balloon, SiO ₂ , Al ₂ O _Three , FeO, CaO, Na ₂ Inorganic powder materials such as hollow materials such as O and MgO, and organic polymer substances such as polypropylene, polyethylene, styrene, ethylene, urethane, phenol, polyester, acrylic, and butadiene rubber latex can be used as the foamable resin powder.
[0030]
Of these, glass balloons are preferred because they have a low water absorption rate, can reduce the water / cement ratio, and improve strength. The mixing ratio of the lightweight aggregate is preferably 40 to 150% by weight with respect to cement and 200 to 5000% by weight with respect to FRP. If it is less than the lower limit of this range, the dispersibility of FRP may be hindered, and if it exceeds the upper limit of this range, the specific gravity becomes too large, and destruction may occur due to its own weight.
[0031]
Although a water reducing agent can be used, it is preferably 10% by weight or less based on cement and 200% by weight or less based on FRP. If it is less than 1% by weight with respect to the cement, water hardening is small and workability is not sufficient. Exceeding 10% by weight with respect to cement is not preferable because the fireproof performance of the hardened cement body tends to be lowered and the material cost is increased. Specific water reducing agents include AE water reducing agents and high performance water reducing agents.
[0032]
The form of mixing into the cement material does not necessarily have to be uniform. For example, when the cement material is large, a lightweight filler such as calcium carbide that is lighter and lower in cost than the waste FRP is placed at the center of the cement material thickness. The crushed material of the present invention may be disposed on the surface layer of the cement material. In order to selectively arrange the crushed material having a bend, it is also effective to perform the split molding of the cement material. That is, a part or all of the surface of the cement material hardened in a normal process is covered with a cement containing a crushed material having a bend and integrated.
[0033]
Even if the periphery of the FRP crushed material of the present invention is completely covered with cement, the cement may adhere as a binder so as to connect the crushed materials. If it is completely covered with cement, the strength is remarkably improved, but the specific gravity also increases. Therefore, it is preferable to adjust the amount of cement adhering appropriately in relation to the weight. In the case of covering thoroughly with cement, it is effective to expel bubbles and gas after mixing by vibration, heat, etc., and methods for reducing the amount of adhesion include mixing air and gas or mixing foaming material. It is effective to do.
[0034]
Furthermore, when the crushed material of the present invention is as large as several centimeters, the crushed material is three-dimensionally held in a relatively large size. Even without this, cement or cement admixture can be held in the space between the crushed materials, and a member having a shape close to a desired shape can be formed. By eliminating the need for molding auxiliary materials such as molds, cement members can be molded at an extremely low cost. A preferable mixing amount of the crushed material of the present invention is 3% to 70%. Within the scope of this claim, the cement material has a balance of weight, strength and cost. More preferably, it is 3% to 40%.
[0035]
In addition, it is preferable to disperse the crushed material on the surface of the cement material in an uneven manner, so that the vicinity of the surface becomes high in strength and the member is subjected to bending. However, the FRP pulverized material of the present invention is selectively disposed on the surface of the cement material. If the adhesion of cement is reduced to make it porous, sound absorption characteristics and water retention can be provided. The porous part is easily supplemented with seeds and soil, so that an effect of becoming a habitat for plants and microorganisms is produced. In this case, the amount of crushed material near the surface is preferably 10% to 30%. Of course, a foam material, a metal plate, or the like may be embedded in the cement material, and the shape of the cement member may be hollow, solid, or any shape.
[0036]
In the case of a cement member used in a humid environment, the ground product may be required to have alkali resistance. Therefore, the reinforcing fiber of the ground product is vinylon fiber, aramid fiber, modacrylic fiber, carbon, which has alkali resistance. It is preferable that more fibers are contained.
[0037]
Since the cement material of the present invention is excellent in light weight, high strength, low cost, and corrosion resistance, it can be used for building materials such as wall materials, roofing agents, flooring materials, cement tiles, building roofs such as main tiles, and building members such as outer walls. Suitable for use as garden materials such as flower pots, flower bed fences, garden floorboards, and other marine structures such as tetrapots, revetment walls and weights. More specifically, various building materials such as houses, hotels, schools, hospitals, offices, theaters, gymnasiums and office buildings. Other applications include water permeable panels, foundation panels, soundproof panels, heat insulation panels, tetrapots, utility poles, side grooves, fume pipes, roof tiles, and greening structures.
[0038]
Next, the crushed material of the present invention can be used by being mixed with resin and rubber. Typical resins include thermosetting resins such as epoxy resins, unsaturated polyester resins, phenol resins, benzoxazine resins, vinyl ester resins, or polyethylene, polypropylene resins, polyamide resins, ABS resins, and polybutylene terephthalate resins. , Thermoplastic resins such as polyacetal resin and polycarbonate resin, and modified resins obtained by alloying these resins.
[0039]
As in the case of mixing in the cement as described above, in the resin, the crushed material may be disposed locally (selectively) or uniformly. Moreover, it does not matter whether it is integrally formed or divided. Further, the curing may be repeated a plurality of times. Further, a filler / additive other than the crushed material of the present invention may be used in combination. In the case of resin, since the specific gravity is lower than that of cement, the addition amount of the crushed material of the present invention is suitably 3% to 60%.
[0040]
Resin materials can be used for tabletop tabletops, basketball panels, sports equipment such as score and participant signage panels, civil engineering materials such as panels and bulletin boards used at construction sites, cement tiles, main tiles, and other houses. Materials that require light weight, durability, and low cost, such as building members such as roofs and outer walls, and other industrial materials are conceivable. For architectural applications, phenolic resins are preferred because they are excellent in heat resistance and produce less gas during combustion.
[0041]
In addition, when mixed with resin, as in the case of mixing with cement, the fracture is localized and the crack does not propagate to the entire member, so that an unprecedented characteristic such as nailing can be produced. When crushed materials containing rubber materials such as tires and belts are mixed, the nailing performance is further improved.
[0042]
Lastly, waste FRP may contain impurities other than FRP, such as paint, labels, and metals. However, removing these contaminants is expensive and does not harm the properties of the final cement material. It may be included within the range of. The proportion of these impurities is preferably 10% or less, and more preferably 5% or less.
[0043]
【Example】
The features of the cement material of the present invention will be described by way of examples.
Example 1
Made from carbon fiber reinforced composite material recovered from the market (two types of carbon fiber: elastic modulus 300 GPa, strength 5600 MPa and elastic modulus 400 GPa, strength 3000 MPa, resin is epoxy resin, fiber content 70%, cure degree 95% ) Golf shaft cylinder (length: 50 cm to 80 cm, diameter: 5 mm to 12 mm) with a uniaxial impact crusher for 1 minute (input energy is 660 kilojoules), and then passed through a 6 mm sieve, the directional radius is 6 mm or more, and the curvature is Half Diameter 80mm 1 kg of crushed material having the following bends was obtained. The crushed material was filled in a 1-liter plastic container, and the filling rate was measured by pouring water into it, which was 0.6.
[0044]
This crushed material is mixed with ordinary Portland cement, water reducing agent, standard sand, and water (mixing ratio is 100% by weight of crushed material, 60% by weight of water, 3% by weight of water reducing material, 100% by weight of standard sand). Curing was performed to obtain a cement board (30 cm × 30 cm, thickness 20 mm). The cement board has pores on the surface and inside, and as a result of cross-sectional observation, it was confirmed that the crushed material was uniformly dispersed three-dimensionally. It had water permeability and specific gravity was 1.3.
[0045]
A bending test piece (95 × 60 × 20 mm) was cut out from this cement plate, and as a result of a three-point bending test, the maximum load was 170% of the blank cement cured body to which no crushed material was added. Heavy load Later, the test piece was loaded without being separated like blank cement.
[0046]
Moreover, when the bending test piece cut out from the cement board was left in the sea for 3 months, a green material was adhered to the pores. Furthermore, when this specimen was subjected to a bending test, Heavy load There was no change in the destruction mode.
(Example 2)
A cement board (30 cm × 30 cm, thickness 20 mm) was obtained in the same manner as in Example 1, except that the weight% of the crushed material was 60 in Example 1. This cement board also has pores on the surface and inside, and as a result of cross-sectional observation, it was confirmed that the crushed material was uniformly dispersed three-dimensionally. It had water permeability and specific gravity was 1.4.
[0047]
A bending test piece (95 × 60 × 20 mm) was cut out from this cement plate, and as a result of a three-point bending test, the maximum load was 130% of the blank cement cured body to which no crushed material was added. Heavy load Later, the test piece was loaded without being separated like blank cement.
[0048]
Moreover, when the bending test piece cut out from the said cement board was made to absorb water and the thermal cycle test (convection time 10 minutes, cycle number 3000) was -30 degreeC-80 degreeC, the crack and peeling were not recognized. Furthermore, when this specimen was subjected to a bending test, Heavy load There was no change in the destruction mode.
(Example 3)
Made of carbon fiber reinforced composite material recovered from the market (two types of carbon fiber: elastic modulus 500 GPa, strength 3000 MPa and elastic modulus 450 GPa, strength 3000 MPa, resin is epoxy resin, fiber content 74%, cure degree 95% ) Of a fishing rod cylinder (length: 80 cm to 120 cm, diameter: 6 mm to 15 mm) with a uniaxial impact crusher (consumed energy: 600 kilojoules / kg), and then passed through a 10 mm sieve, the fixed radius is 10 mm or more, and the radius of curvature is 60 mm. 500 g of crushed material having the following bending was obtained. The crushed material was filled in a 1-liter plastic container, and the filling rate was measured by pouring water into it, which was 0.4.
[0049]
This crushed material and polyester resin (100 parts of main agent, 1 part of curing agent) are mixed at a mixing ratio of 100: 100, and a 9 mm thick resin panel having a polyurethane foam of 5 mm thickness (foaming magnification 30 times) in the center. Obtained. As a result of cross-sectional observation, it was confirmed that the crushed material was uniformly dispersed three-dimensionally in the form of sandwiching the polyurethane foam symmetrically. The specific gravity of the portion excluding polyurethane was 1.4.
[0050]
When this resin panel was cut out into a square and used as a table top for a table tennis table, it was found that it had a lighter hitting sound than a wooden (thickness 25 mm).
[0051]
Also, when a test piece cut out from the resin plate was subjected to a bending test, Heavy load It was confirmed that the test piece was subsequently subjected to load bearing without separation.
(Comparative Example 1)
Made of carbon fiber reinforced composite material collected from the same market as in Example 1 (two types of carbon fiber: elastic modulus 300 GPa, strength 5600 MPa and elastic modulus 400 GPa, strength 3000 MPa, resin is epoxy resin, fiber content is 70%, A golf shaft cylinder (length: 50% to 80 cm, 5 mm to 12 mm) having a curing degree of 95% was pulverized with a grinder (particle size # 80) (particle size of the pulverized product was about 20 μm) to obtain 1 kg of CFRP powder. . The input energy was 8000 kilojoules. Subsequently, the crushed material was filled into a 1 liter plastic container, and the filling rate was measured by pouring water under stirring. As a result, the filling rate was 0.9.
[0052]
This crushed material is mixed with ordinary Portland cement, water reducing agent, standard sand, and water (mixing ratio is 100% by weight of crushed material, 60% by weight of water, 3% by weight of water reducing material, 100% by weight of standard sand). Curing was performed to obtain a cement board (30 cm × 30 cm, thickness 20 mm).
[0053]
As a result of cross-sectional observation, the cement board was confirmed to be homogeneous. There was almost no water permeability and specific gravity was 1.7.
[0054]
As a result of cutting a bending test piece (95 × 60 × 20 mm) from this cement plate and performing a three-point bending test, the maximum load was 90% of the blank cement cured body to which no crushed material was added. Heavy load Later, the test piece separated.
[0055]
【The invention's effect】
According to the present invention, it is possible to obtain a suitable waste FRP crushed material by adding it to cement or a resin material and recycling it compared to conventional pulverized products. Moreover, since the energy required for crushing is small, it is possible to recycle at extremely low cost, and it can be said that the social contribution is very high.
[Brief description of the drawings]
FIG. 1 shows a crescent-shaped waste FRP crushed material of the present invention.
FIG. 2 is a coiled waste FRP crushed material of the present invention.
FIG. 3 is an S-shaped waste FRP crushed material of the present invention.
FIG. 4 is a waste FRP crushed material of the present invention having a multilobal shape.
[Explanation of symbols]
1: Constant diameter
2: Curvature radius
3: Thickness

Claims (7)

A waste FRP crushed material having a fixed direction diameter of 3 mm or more and a minimum radius of curvature of 150 mm or less , and the filling rate when only the waste FRP crushed material is assembled is within a range of 0.2 to 0.7. A waste FRP crushed material. Ing by crushing waste FRP is cylindrical material, waste FRP crushing of placing serial to claim 1. The waste FRP crushing object is, you containing carbon fibers, waste FRP crushing of claim 1 or 2. The FRP is you contains at least thermoplastic resin or epoxy resin, waste FRP crushing product according to any one of claims 1 to 3. Cement material containing the FRP crushed material according to any one of claims 1 to 4. A concrete member containing the FRP crushed material according to any one of claims 1 to 4 . The resin member containing the FRP crushed material in any one of Claim 1 thru | or 4 .

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