Solidifying agent and method for producing solidifying agent

Abstract

To provide a solidifying agent which is excellent in durability and heat resistance, hardly causes ruts, suppresses scattering of aggregate, and has good water permeability, when used, for example, for paving a road or a runway, and to provide a method for producing the solidifying agent.SOLUTION: A solidifying agent according to the present invention includes an epoxy resin, fibers, and an additive, wherein the fiber includes a nylon fiber, a glass fiber, and a polyester fiber. In a method for producing a solidifying agent according to the present invention, an epoxy resin and an additive are charged into a mixer and mixed, and then polyester fibers, glass fibers, and nylon fibers are sequentially charged into the mixer and kneaded.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This invention relates to a solidifying agent for use in civil engineering and construction that can be used in wide areas such as roadways, sidewalks, parking lots, roads, and runways, and a method for producing the solidifying agent. [Background technology]

[0002] Roads are generally paved with asphalt or concrete.

[0003] Conventional asphalt pavement involves mixing asphalt, which is derived from crude oil and is primarily composed of hydrocarbons, with aggregates such as gravel and sand, heating the mixture, spreading it evenly, and then compacting it with a roller or other tool.

[0004] On the other hand, concrete pavement is a method in which cement made from burnt and crushed lime or clay is mixed with sand, gravel, and water, spread evenly, and then cured to create a strong pavement.

[0005] As a prior art document on asphalt mixtures used for such road paving, for example, Patent Document 1 discloses a soft asphalt mixture characterized by containing 30 to 150 parts by weight of linseed oil fatty acid and / or linseed oil fatty acid ester per 100 parts by weight of soft asphalt having a penetration of more than 80 and not more than 300. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5939722 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when it comes to road pavement, durability, heat resistance, and water permeability (ease of drainage) are often issues.

[0008] Asphalt pavement is easy to construct, inexpensive, provides excellent driving performance, and is quiet, but it is prone to ruts and softens at high temperatures, making it inferior to concrete pavement in terms of durability (strength). In addition, asphalt pavement, which has permeability and drainage properties, has the problem that its permeability and quietness gradually decrease due to the collapse of voids.

[0009] On the other hand, concrete pavement is sturdy, rut resistant, and heat resistant, and can withstand long-term use, but it has poor drainage, is expensive to pave, and takes a long time to install. In addition, because it is sturdy, it becomes more difficult to work on it over the course of the construction period, and removal costs are high.

[0010] The present invention has been made in consideration of the above circumstances, and has an object to provide a solidifying agent and a method for producing the solidifying agent which, when used for road or runway pavements, has excellent durability and heat resistance, is resistant to ruts, prevents aggregate scattering, and also has good water permeability. [Means for solving the problem]

[0011] The inventors of the present application conducted extensive research and found that, in a solidifier containing an epoxy resin as a thermosetting synthetic resin, fibers, and additives, by incorporating organic and inorganic fibers as the fibers, it is possible to obtain a solidifier that is excellent in durability and heat resistance when used for road and runway pavements, is less likely to cause ruts, prevents aggregate scattering, and also has good water permeability, and thus completed the present invention. That is, the present invention provides the following.

[0012] According to claim 1, the hardener of the present invention is a hardener containing an epoxy resin, fibers and additives, and is characterized in that the fibers include nylon fibers, glass fibers and polyester fibers.

[0013] In this way, the solidifying agent described in claim 1 has excellent durability and heat resistance when used for road and runway pavements, is less likely to cause ruts, suppresses aggregate scattering, and also has good water permeability.

[0014] According to claim 2, the solidification agent according to the present invention is characterized in that the solidification agent is used for civil engineering and construction.

[0015] Furthermore, according to claim 3, the solidifying agent of the present invention is characterized in that the nylon fibers, glass fibers, and polyester fibers are set to a total content of 6.0 mass % or less relative to 100 mass % of the epoxy resin.

[0016] Furthermore, according to claim 4, the curing agent according to the present invention is characterized in that the glass fibers are contained in an amount within a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, and the polyester fibers are contained in an amount within a range of 2.0 mass % to 4.0 mass % relative to 100 mass % of the epoxy resin.

[0017] According to claim 5, the solidifying agent of the present invention is characterized in that it is set to contain 1.5% by mass of the nylon fiber, 1.5% by mass of the glass fiber, and 3.0% by mass of the polyester fiber relative to 100% by mass of the epoxy resin.

[0018] Furthermore, according to claim 6, the solidifying agent of the present invention is characterized in that the length of the nylon fibers is set shorter than the length of the glass fibers, and the length of the glass fibers is set shorter than the length of the polyester fibers.

[0019] According to claim 7, the solidifying agent of the present invention is characterized in that the nylon fibers have a length of 0.5 mm to 2 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.5, the glass fibers have a length of 1 mm to 4 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.0, and the polyester fibers have a length of 2 mm to 8 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5.

[0020] Furthermore, according to claim 8, the solidifying agent of the present invention is characterized in that the length of the nylon fibers is set to 1.0 mm, the length of the glass fibers is set to 2.0 mm, and the length of the polyester fibers is set to 4.0 mm.

[0021] According to a ninth aspect of the present invention, the solidifying agent is characterized in that the epoxy resin has a viscosity set within the range of 10,000 mPa·s to 14,000 mPa·s.

[0022] According to a tenth aspect of the present invention, the hardening agent is characterized in that the epoxy resin has a viscosity set to 12,000 mPa·s.

[0023] Furthermore, according to claim 11, the solidifying agent of the present invention is characterized in that the additive is contained in a range of 8% by mass to 12% by mass relative to 100% by mass of the solidifying agent.

[0024] According to a twelfth aspect of the present invention, the solidifying agent is characterized in that the additive is contained in an amount of 10 mass % relative to 100 mass % of the solidifying agent.

[0025] According to a thirteenth aspect of the present invention, the solidifying agent contains fly ash as the additive.

[0026] According to claim 14, the method for producing a solidifier according to the present invention is characterized in that an epoxy resin and an additive are charged into a mixer and mixed, and then nylon fiber, glass fiber, and polyester fiber are charged into the mixer in this order and kneaded.

[0027] Furthermore, according to claim 15, the method for producing a solidifying agent according to the present invention is characterized in that the length of the nylon fibers is set shorter than the length of the glass fibers, and the length of the glass fibers is set shorter than the length of the polyester fibers.

[0028] According to claim 16, the method for producing a solidifying agent according to the present invention is characterized in that the polyester fibers have a length of 2 mm to 8 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 1.0 to 1.5, the glass fibers have a length of 1 mm to 4 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 2.0 to 3.0, and the nylon fibers have a length of 0.5 mm to 2 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 0.5 to 1.5.

[0029] Furthermore, according to claim 17, the method for producing a solidifying agent according to the present invention is characterized in that the nylon fibers, glass fibers, and polyester fibers are set to a total content of 6.0 mass% or less relative to 100 mass% of the epoxy resin.

[0030] Furthermore, according to claim 18, the method for producing a solidifying agent according to the present invention is characterized in that the nylon fibers are contained in an amount within a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, the glass fibers are contained in an amount within a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, and the polyester fibers are contained in an amount within a range of 2.0 mass % to 4.0 mass % relative to 100 mass % of the epoxy resin.

[0031] Furthermore, according to claim 19, the method for producing a solidifying agent according to the present invention is characterized in that the nylon fiber is 1.5 mass %, the glass fiber is 1.5 mass %, and the polyester fiber is 3.0 mass % relative to 100 mass % of the epoxy resin.

[0032] Moreover, according to a twentieth aspect of the present invention, there is provided a method for producing a solidifying agent, wherein the epoxy resin has a viscosity set within a range of 10,000 mPa·s to 14,000 mPa·s.

[0033] Moreover, according to a twenty-first aspect of the present invention, there is provided a method for producing a hardening agent, wherein the epoxy resin has a viscosity set to 12,000 mPa·s.

[0034] Furthermore, according to claim 22, the method for producing a solidifying agent according to the present invention is characterized in that the additive is contained in an amount within a range of 8% by mass to 12% by mass with respect to 100% by mass of the solidifying agent.

[0035] Moreover, according to a twenty-third aspect of the present invention, there is provided a method for producing a solidifying agent, wherein the additive is contained in an amount of 10% by mass relative to 100% by mass of the solidifying agent.

[0036] According to a twenty-fourth aspect of the present invention, the method for producing a solidifying agent includes fly ash as the additive.

[0037] Moreover, according to a twenty-fifth aspect of the present invention, the method for producing a solidifying agent is characterized in that, in the mixing and kneading, the mixer is rotated within a range of 400 rpm to 500 rpm.

[0038] Moreover, according to claim 26, the method for producing a solidifying agent according to the present invention is characterized in that in the mixing and kneading, the mixer is rotated at 450 rpm.

[0039] According to a twenty-seventh aspect of the present invention, there is provided a method for producing a solidifying agent, wherein a mixing and kneading temperature is set to 25°C to 30°C in the mixing and kneading. Effect of the Invention

[0040] According to the present invention, it is possible to provide a solidifying agent and a method for producing the solidifying agent which, when used for paving roads, runways, etc., has excellent durability and heat resistance, is less likely to cause ruts, suppresses aggregate scattering, and also has good water permeability. [Brief description of the drawings]

[0041] [Figure 1] FIG. 2 shows the results of strength and permeability tests on crushed stone blocks produced using the solidifying agent of the present invention and comparative asphalt. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Hereinafter, a mode for carrying out the present invention (hereinafter, simply referred to as "the present embodiment") will be described in detail. The following embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0043] <Solidifying agent> The hardener according to one embodiment of the present invention contains an epoxy resin (A) as a thermosetting synthetic resin, fibers (B) and an additive (C). The hardener according to the present invention is primarily used for paving roads and runways, but needless to say, is not limited thereto. A method of using the hardener according to an embodiment of the present invention for road paving, for example, will be described later.

[0044] (Thermosetting synthetic resin) The thermosetting synthetic resin (A) used in this embodiment can be any thermosetting synthetic resin having two or more polymer groups in the molecule, and examples of publicly known thermosetting synthetic resins (A) include epoxy resins, etc. By using such epoxy resins (A), the road paving using the solidifying agent of this embodiment is preferable because it has excellent durability and heat resistance.

[0045] Furthermore, the epoxy resin (A) used in this embodiment contains a high-viscosity thermosetting synthetic resin with a viscosity of 10,000 mPa·s to 15,000 mPa·s, and by having the epoxy resin (A) content within the above numerical ranges, the road pavement using the obtained solidifier is more durable, less prone to ruts, and less prone to aggregate scattering. More specifically, it is more preferable for the epoxy resin (A) to contain 12,000 mPa·s, which can reliably achieve the above effects.

[0046] From the viewpoint of the strength of road pavement, the equivalent weight of the epoxy resin (A) is preferably 150 to 200 g / equivalent, and more preferably 160 to 195 g / equivalent.

[0047] (fiber) The fibers (B) contained in the solidifying agent according to one embodiment of the present invention contain nylon fibers as organic fibers (B-1), glass fibers as inorganic fibers (B-2), and polyester fibers as organic fibers (B-3).

[0048] The fibers contained in the solidifiers used in conventional road pavements mainly serve as extenders (fillers), and in most cases only one type of such fiber was contained in the solidifier. However, the solidifier of the embodiment of this invention contains three types of fibers, organic fiber (B-1), inorganic fiber (B-2), and organic fiber (B-3), so that road pavements using the obtained solidifier do not collapse voids and have good water permeability. In addition, the strength of the road pavement can be improved by including various types of fibers.

[0049] In addition, the fibers can be used without any particular restrictions as long as they are organic fibers and inorganic fibers. In this embodiment, nylon fibers are used as the organic fibers (B-1), glass fibers are used as the inorganic fibers (B-2), and polyester fibers are used as the organic fibers (B-3).

[0050] Here, the compounding ratios of the nylon fiber (B-1) to the epoxy resin (A) are set to be within the range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin (A), the glass fiber (B-2) to be within the range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, and the polyester fiber (B-3) to be within the range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin.

[0051] In addition, the important point for achieving the effect that the road pavement using the obtained solidifying agent is more durable, less prone to ruts, and less scattering of aggregate is that the blending ratio of the total fiber (B) consisting of the nylon fiber (B-1), glass fiber (B-2), and polyester fiber (B-3) to 100% by mass of epoxy resin (A) is set to within 6% by mass. Therefore, in this embodiment, the ratios are set to 1.5% by mass of nylon fiber (B-1), 1.5% by mass of glass fiber (B-2), and 3.0% by mass of polyester fiber (B-3) relative to 100% by mass of epoxy resin (A).

[0052] The nylon fibers (B-1) have a length of 0.5 mm to 2 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 0.5 to 1.5, the glass fibers (B-2) have a length of 1 mm to 4 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 2.0 to 3.0, and the polyester fibers (B-3) have a length of 2 mm to 8 mm, a thickness of 10 to 20 μm, and a specific gravity in the ranges of 1.0 to 1.5.

[0053] In addition, the length of the fibers (B) is an important point for achieving the effect that the road pavement using the obtained solidifying agent is more durable, less prone to ruts, and less scattering of aggregates. The length of the nylon fibers (B-1) is set shorter than the length of the glass fibers (B-2), and the length of the glass fibers (B-2) is set shorter than the length of the polyester fibers (B-3). That is, in this embodiment, {length of nylon fibers (B-1)}<{length of glass fibers (B-2)}<{length of polyester fibers (B-3)} In other words, it is essential that the nylon fiber (B-1) is the shortest among the fibers (B), the polyester fiber (B-3) is the longest among the fibers, and the glass fiber (B-2) has a length intermediate between that of the nylon fiber (B-1) and that of the polyester fiber (B-3).

[0054] Specifically, in this embodiment, the length of the nylon fiber (B-1) is set to 1.0 mm, the length of the glass fiber (B-2) is set to 2.0 mm, and the length of the polyester fiber (B-3) is set to 4.0 mm.

[0055] (Additives) In this embodiment, the additive (C) contained in the solidifying material contains fly ash discharged from an incinerator, etc. This additive (C) promotes the dispersion of the fiber (B) contained in the solidifying agent and improves the strength of road pavement using the solidifying agent, and a specific example of this is fine sand.

[0056] The additive (C) is preferably contained in an amount of 8 to 12 mass % relative to 100 mass % of the epoxy resin (A), and in this embodiment, it is contained in an amount of 10 mass %.

[0057] <Method of manufacturing the solidifying agent> The method for producing a solidifying agent according to an embodiment of the present invention does not use a typical method for producing a solidifying agent, but is particularly characterized by the order in which the fibers (B) are added.

[0058] That is, in this embodiment, the epoxy resin (A) and the additive (C) are charged into a mixer and mixed, and then the nylon fiber (B-1), the glass fiber (B-2), and the polyester fiber (B-3) are charged into the mixer as the fibers (B) in the order listed and kneaded. That is, as described above, the lengths of the nylon fiber (B-1), the glass fiber (B-2), and the polyester fiber (B-3) as the fibers (B) are in the relationship represented by the following inequality: {length of the nylon fiber (B-1)}<{length of the glass fiber (B-2)}<{length of the polyester fiber (B-3)} In other words, the fibers (B) are fed into the mixer in the order of length from shortest to longest. Since the fibers (B) are fed into the mixer in this manner starting from the shortest fibers (B), the fibers (B) are reliably dispersed in the mixer, and a uniform mixed state is achieved, resulting in homogenization of the product in which this solidifying agent is used.

[0059] In this way, the solidifying agent can be produced by putting the thermosetting synthetic resin (A), the fiber (B) and the additive (C) into the mixer and mixing them. The rotation speed of the mixer is preferably 400 to 500 rpm, and the mixing temperature is preferably about 25°C to 30°C. Specifically, in this embodiment, the rotation speed of the mixer is set to 450 rpm.

[0060] <Use of solidifying agent> The solidifying agent according to the embodiment of the present invention is primarily used for road paving. Specifically, the produced solidification agent is mixed with a hardener, hardening accelerator, and aggregate, and the mixture is stirred, and then the mixture is spread over the road, leveled, and then compacted with a roller, etc., to form a pavement. The aggregate in this case is not limited to crushed stone, gravel, and other materials normally used for road paving, but sea sand, coal ash, wood chips, used tea leaves, and the like can also be used, which is unique.

[0061] In addition to road paving, the solidifying agent of the present invention can also be used for runway paving, block solidification of river sludge and bay coastal sea sand, solidification treatment of coal ash, incineration ash, sludge and hazardous waste, and solidification treatment of various other aggregates.

[0062] Materials that can be solidified include wood chips, bamboo charcoal powder, rice husks, used tea leaves, coffee grounds, paper waste, resin cement, oil sand, clay plates, glass powder, green wood, and many other materials. Roads can be paved by laying blocks that have been solidified using these substances as aggregate.

[0063] Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications and improvements can be made to the above embodiments. In addition, it is clear from the description of the claims that forms including such modifications or improvements can also be included in the technical scope of the present invention. EXAMPLES

[0064] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the examples shown below.

[0065] As Examples 1 to 3, crushed stone blocks were produced using the solidifying agent of the present invention.

[0066] In Example 1, 467.5 g of No. 6 crushed stone, 82.5 g of crushed sand (5 mm), 2.75 g of coal ash, 27.5 g of solidifier, and 11 g of hardener (product name: hardener) were mixed and hardened into a block to create the crushed stone block of Example 1.

[0067] Similarly, 467.5 g of No. 6 crushed stone, 110 g of crushed sand (5 mm), 2.75 g of coal ash, 27.5 g of solidifier, and 11 g of hardener (product name: hardener) were mixed and hardened into a block to produce the crushed stone block of Example 2.

[0068] In addition, 550 g of dense asphalt mixture, 2.75 g of coal ash, 27.5 g of solidifying agent, and 11 g of hardening agent (product name: hardening agent) were mixed and hardened into a block to prepare the crushed stone block of Example 3. Each crushed stone block had dimensions of 100 mm × 100 mm × 30 mm and a mass of 550 g.

[0069] Further, 6664g of gravel (7mm), 1666g of fine sand (2mm), 333.2g of solidifying agent, and 133.28g of hardening agent were mixed and hardened into a block to obtain the crushed stone block of Example 4. Then, 4560g of No. 6 crushed stone, 1140g of fine sand (2mm), 228g of solidifying agent, and 91.2g of hardening agent (product name: hardening agent) were mixed and hardened into a block to obtain the crushed stone block of Example 5. The crushed stone block of Example 4 had dimensions of 300.4mm x 301.4mm x 51.9mm and a mass of 8796g, and the crushed stone block of Example 5 had dimensions of 400mm x 150mm x 50mm and a mass of 6019g.

[0070] <Bending strength test> The crushed stone blocks of Examples 1 to 3 and asphalt as a comparative control (reference value) were each subjected to a bending strength test.

[0071] In the bending strength test, a specimen with width b and height h was placed on two supports separated by a distance L, a load was applied in a direction perpendicular to the surface of the specimen, and the maximum load p applied to the specimen when it finally broke was measured, and the bending strength fbb was calculated by the following formula (1). Note that the width b in Examples 1 to 3 and the comparative example was all 100 mm, the height h was all 30 mm, and the distance L between the supports was all 90 mm. fb = (3 × p × L) / (2 × b × h 2 ) · · · (1)

[0072] In addition, when the crushed stone block of Reference Example 1 (No. 1) using the solidifying agent of this invention was subjected to a bending strength test, the results were b = 100.6 (mm), h = 34.2 (mm), L = 90 (mm), and P = 5.62 (N). From formula (1), fb = 6.45 (N / mm 2Similarly, when the crushed stone block of Reference Example 2 (No. 2) using the solidifying agent of this invention was subjected to a bending strength test, the results were b = 100.4 (mm), h = 35.6 (mm), L = 90 (mm), and p = 5.6 (N). From formula (1), fb = 5.94 (N / mm 2 ) was calculated.

[0073] The tests for the crushed stone blocks of Reference Examples 1 and 2 were terminated when the crushed stone broke (gravel broke). The average bending strength of Reference Examples 1 and 2 was 6.1956 (N / mm 2 ) was.

[0074] The measurement results for Examples 1 to 3 and the comparative example are shown in FIG. 1. The reference value for asphalt is 2.0 kN at the adhesive interface, and the bending strength is 3.0 N / mm 2 In contrast, the crushed stone block in Example 1 broke at 5.3 kN and had a bending strength of 8.0 N / mm 2 The crushed stone block of Example 2 broke at 6.4 kN and had a bending strength of 9.6 N / mm 2 The crushed stone block of Example 3 broke at 7.1 kN and had a bending strength of 10.7 N / mm 2 It was confirmed that the crushed stone blocks of Examples 1 to 3 were excellent in strength.

[0075] <Wheel tracking test> Next, the crushed stone block of Example 4 and asphalt as a comparative example were subjected to a wheel tracking test. The test conditions were a running frequency of 42 times / min and a test temperature of 600±0.5°C.

[0076] As shown in Figure 1, the standard value for dynamic stability DS of asphalt is 3,000 times / mm, while the dynamic stability DS of the crushed stone block of Example 4 is 63,000 times / mm or more, confirming that the crushed stone block of Example 4 is less likely to develop ruts.

[0077] <Labeling Test> Next, the crushed stone block of Example 5 and asphalt (general roads and expressways) as a comparison subject were subjected to a labeling test. The test conditions were a wheel rotation speed of 200 revolutions / min and a test temperature of -10°C.

[0078] The results are shown in Figure 1. The standard value for the amount of wear on asphalt (general roads) was 1.3 cm. 2 , the wear of asphalt (highway) is 0.9 cm 2 The wear amount of the crushed stone block in Example 5 was 0.63 cm 2 It was confirmed that the crushed stone block of Example 2 was excellent in durability.

[0079] <Torsion aggregate scattering test> Next, the crushed stone block of Example 4 and the porous asphalt (Mixture H type) for comparison were subjected to a twisted aggregate scattering test. The test was conducted to determine the twisted aggregate scattering rate for 120 minutes, and the test temperature was set at 50±2°C.

[0080] As shown in Figure 1, the standard value for the aggregate scattering rate of porous asphalt was 15.6%, while the aggregate scattering rate of the crushed stone block of Example 4 was 0%, confirming that the crushed stone block of Example 2 has excellent durability.

[0081] <Water permeability test> Finally, the crushed stone block of Example 4 and asphalt for comparison were each subjected to a water permeability test.

[0082] As a result, as shown in Figure 1, the standard value for the permeability coefficient of asphalt was 0.15 cm / s, while the permeability coefficient of the crushed stone block of Example 4 was 1.7 cm / s, confirming that the crushed stone block of Example 2 has excellent permeability.

[0083] From the above, it was confirmed that these examples provide a solidifying agent that is excellent in durability and heat resistance, is less likely to cause ruts, suppresses aggregate scattering, and also has good water permeability when used for paving roads and runways.

Claims

1. A hardener comprising an epoxy resin, fibers and additives, the fibers including nylon fibers, glass fibers and polyester fibers.

2. The solidifying agent according to claim 1, which is used for civil engineering and construction purposes.

3. 2. The solidifying agent according to claim 1, wherein the total amount of the nylon fiber, the glass fiber and the polyester fiber is set to 6.0 mass % or less relative to 100 mass % of the epoxy resin.

4. The nylon fiber is contained in a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, The glass fiber is contained in a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, and The solidifying agent according to claim 3, characterized in that the polyester fiber is contained in a range of 2.0 mass % to 4.0 mass % relative to 100 mass % of the epoxy resin.

5. 5. The solidifying agent according to claim 4, characterized in that it is set to contain 1.5% by mass of the nylon fiber, 1.5% by mass of the glass fiber, and 3.0% by mass of the polyester fiber relative to 100% by mass of the epoxy resin.

6. The length of the nylon fiber is set shorter than the length of the glass fiber, 2. The solidifying agent according to claim 1, wherein the length of the glass fibers is set shorter than the length of the polyester fibers.

7. The nylon fibers have a length of 0.5 mm to 2 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.5, The glass fiber has a length of 1 mm to 4 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.0, 7. The solidifying agent according to claim 6, wherein the polyester fibers have a length in the range of 2 mm to 8 mm, a thickness in the range of 10 to 20 μm, and a specific gravity in the range of 1.0 to 1.

5.

8. The length of the nylon fiber is set to 1.0 mm, The length of the glass fiber is set to 2.0 mm; 8. The solidifying agent according to claim 7, wherein the length of the polyester fibers is set to 4.0 mm.

9. 2. The solidifying agent according to claim 1, wherein the epoxy resin has a viscosity set within a range of 10,000 mPa·s to 14,000 mPa·s.

10. 10. The solidifying agent according to claim 9, wherein the epoxy resin has a viscosity set to 12,000 mPa·s.

11. 2. The solidifying agent according to claim 1, wherein the additive is contained in an amount within a range of 8% by mass to 12% by mass relative to 100% by mass of the solidifying agent.

12. The solidifying agent according to claim 11, characterized in that the additive is contained in an amount of 10 mass % relative to 100 mass % of the solidifying agent.

13. 2. The solidifying agent according to claim 1, further comprising fly ash as the additive.

14. A method for producing a solidifying agent, comprising the steps of: charging an epoxy resin and an additive into a mixer and mixing them; then charging nylon fiber, then glass fiber, and then polyester fiber into the mixer in the order mentioned, and kneading the fibers.

15. The length of the nylon fibers is set shorter than the length of the glass fibers, 15. The method for producing a solidifying agent according to claim 14, wherein the length of the glass fibers is set shorter than the length of the polyester fibers.

16. The polyester fiber has a fiber length of 2 mm to 8 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5, The glass fibers have a length of 1 mm to 4 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.0, The method for producing a solidifying agent according to claim 15, characterized in that the nylon fibers have a fiber length set within the ranges of 0.5 mm to 2 mm, a thickness set within the ranges of 10 to 20 μm, and a specific gravity set within the ranges of 0.5 to 1.

5.

17. 15. The method for producing a solidifying agent according to claim 14, wherein the total amount of the nylon fiber, the glass fiber and the polyester fiber is set to 6.0 mass % or less relative to 100 mass % of the epoxy resin.

18. The nylon fiber is contained in a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, The glass fiber is contained in a range of 1.0 mass % to 2.0 mass % relative to 100 mass % of the epoxy resin, The method for producing a solidifying agent according to claim 17, characterized in that the polyester fiber is contained in a range of 2.0 mass % to 4.0 mass % relative to 100 mass % of the epoxy resin.

19. 20. The method for producing a solidifying agent according to claim 18, wherein the nylon fiber is 1.5% by mass, the glass fiber is 1.5% by mass, and the polyester fiber is 3.0% by mass, relative to 100% by mass of the epoxy resin.

20. The method for producing a solidifying agent according to claim 14, characterized in that the epoxy resin has a viscosity set within a range of 10,000 mPa·s to 14,000 mPa·s.

21. 21. The method for producing a solidifying agent according to claim 20, wherein the epoxy resin has a viscosity set to 12,000 mPa·s.

22. The method for producing a solidifying agent according to claim 14, characterized in that the additive is contained in an amount within a range of 8% by mass to 12% by mass relative to 100% by mass of the solidifying agent.

23. The method for producing a solidifying agent according to claim 22, wherein the additive is contained in an amount of 10% by mass relative to 100% by mass of the solidifying agent.

24. The method for producing a solidifying agent according to claim 14, characterized in that the additive contains fly ash.

25. The method for producing a solidifying agent according to claim 14, wherein the mixer is rotated within a range of 400 rpm to 500 rpm during the mixing and kneading.

26. The method for producing a solidifying agent according to claim 25, characterized in that the mixer is rotated at 450 rpm during the mixing and kneading.

27. The method for producing a solidifying agent according to claim 14, characterized in that the mixing and kneading temperature is set to 25°C to 30°C in the mixing and kneading.

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