Solidifying agent and method for producing a solidifying agent

Abstract

The present invention provides a solidifying agent and a method for producing the solidifying agent that offer excellent durability and heat resistance when used in road paving, prevent rutting, suppress aggregate scattering, and have good water permeability. [Solution] A solidifying agent comprising a thermosetting synthetic resin (A), fibers (B), and additives (C) is provided, wherein the fibers (B) contain organic fibers (B-1), inorganic fibers (B-2), and organic fibers (B-3), with organic fibers (B-1) being present in a quantity of 3-8% by mass, inorganic fibers (B-2) being present in a quantity of 3-8% by mass, and organic fibers (B-1) being present in a quantity of 3-8% by mass, wherein organic fibers (B-1) have a length of 0.5-3.0 mm, a thickness of 10-20 μm, and a specific gravity of 0.5-1.5, inorganic fibers (B-2) have a length of 1.5-4.0 mm, a thickness of 10-20 μm, and a specific gravity of 2.0-3.0, and organic fibers (B-3) have a length of 2.0-5.0 mm, a thickness of 10-20 μm, and a specific gravity of 1.0-1.5.

Description

[Technical Field]

[0001] This invention relates to a solidifying agent containing resins and fibers, and a method for producing the solidifying agent. [Background technology]

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

[0003] Asphalt paving is a method of mixing aggregates such as gravel and sand with asphalt, which is derived from crude oil and mainly composed of hydrocarbons, heating it, spreading it evenly, and then compacting it with rollers or other tools.

[0004] On the other hand, concrete pavement is a method of creating a strong pavement by mixing cement, which is made by burning and crushing lime or clay, with sand, gravel, and water, then spreading and curing the mixture.

[0005] As a prior art document for asphalt mixtures used in 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 less than or equal to 300. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 5939722 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, in road paving, durability, heat resistance, and water permeability (good drainage) are often problematic.

[0008] Asphalt pavement is easy to install, inexpensive, offers excellent drivability, and is quiet. However, it is prone to rutting and softens easily at high temperatures, making it less durable (stronger) than concrete pavement. Furthermore, asphalt pavement, while permeable and drainable, suffers from the problem of void collapse, which gradually reduces its permeability and quietness.

[0009] On the other hand, concrete pavement is sturdy, resistant to rutting, has excellent heat resistance, and can withstand long-term use, but it has poor drainage, high paving costs, and a long construction period. In addition, because it is sturdy, it becomes more difficult to carry out work after the construction period, and removal costs are also high.

[0010] This invention has been made in view of these circumstances, and aims to provide a solidifying agent and a method for producing a solidifying agent that are excellent in durability and heat resistance when used in road paving, prevent rutting, suppress aggregate scattering, and have good water permeability. [Means for solving the problem]

[0011] The inventors conducted diligent research and developed a solidifying agent containing a thermosetting synthetic resin, fibers, and additives. By incorporating organic and inorganic fibers as the fibers, and setting the content of each fiber within a predetermined numerical range, as well as setting the length, thickness, and specific gravity of each fiber within a predetermined numerical range, it was possible to create a solidifying agent that, when used in road paving, exhibits excellent durability and heat resistance, reduces rutting, suppresses aggregate scattering, and also has good water permeability. Thus, the present invention was completed. In other words, the present invention provides the following:

[0012] (1) A first aspect of the present invention is a solidifying agent comprising a thermosetting synthetic resin (A), fibers (B), and additives (C), wherein the fibers (B) contain organic fibers (B-1), inorganic fibers (B-2), and organic fibers (B-3), with the organic fibers (B-1) being 3 to 8% by mass, the inorganic fibers (B-2) being 3 to 8% by mass, and the organic fibers (B-3) being 3 to 8% by mass relative to 100% by mass of the thermosetting synthetic resin (A). A solidifying agent characterized by containing 8% by mass, wherein the organic fibers (B-1) have a length of 0.5 to 3.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.5, the inorganic fibers (B-2) have a length of 1.0 to 4.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.0, and the organic fibers (B-3) have a length of 2.0 to 5.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5. That is the case.

[0013] (2) A second aspect of the present invention is a solidifying agent as described in (1), wherein the thermosetting synthetic resin (A) contains a high-viscosity thermosetting synthetic resin (A-1) with a viscosity of 10,000 to 15,000 mPa·s and a low-viscosity thermosetting synthetic resin (A-2) with a viscosity of 2,000 to 5,000 mPa·s, and is characterized in that of 100% by mass of the thermosetting synthetic resin (A), it contains 50 to 100% by mass of the high-viscosity thermosetting synthetic resin (A-1) and 50 to 0% by mass of the low-viscosity thermosetting synthetic resin (A-2).

[0014] (3) A third aspect of the present invention is a solidifying agent as described in (1), wherein the additive (C) contains a dispersant (C-1) and a bulking agent (C-2), and is characterized in that it contains 10 to 15% by mass of the dispersant (C-1) and 15 to 20% by mass of the bulking agent (C-2) based on 100% by mass of the thermosetting synthetic resin (A).

[0015] (4) The fourth aspect of the present invention is a method for producing a curing agent by mixing a thermosetting synthetic resin (A), a fiber (B), and an additive (C) with a mixer, wherein the fiber (B) contains an organic fiber (B-1), an inorganic fiber (B-2), and an organic fiber (B-3), and based on 100% by mass of the thermosetting synthetic resin (A), the organic fiber (B-1) is contained in an amount of 3 to 8% by mass, the inorganic fiber (B-2) is contained in an amount of 3 to 8% by mass, and the organic fiber (B-3) is contained in an amount of 3 to 8% by mass. The organic fiber (B-1) has a length of 0.5 to 3.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.5. The inorganic fiber (B-2) has a length of 1.0 to 4.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.0. The organic fiber (B-3) has a length of 2.0 to 5.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5. This is a method for producing a curing agent, characterized by the above-mentioned features.

Effects of the Invention

[0016] According to the present invention, it is possible to provide a curing agent and a method for producing the curing agent, which are excellent in durability and heat resistance when used for road paving, are less likely to form ruts, can suppress the scattering of aggregates, and have good water permeability.

Brief Description of the Drawings

[0017] [Figure 1] It is a diagram showing the results of strength and water permeability tests for crushed stone blocks manufactured using the curing agent of the present invention and asphalt as a comparison target.

Modes for Carrying Out the Invention

[0018] Hereinafter, modes for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an exemplification for explaining the present invention and is not intended to limit the present invention to the following content. The present invention can be appropriately modified and implemented within the scope of its gist.

[0019] <Curing Agent> A curing agent according to an embodiment of the present invention contains a thermosetting synthetic resin (A), a fiber (B), and an additive (C). The curing agent of the present invention is mainly used in road paving. The method of using the curing agent of the present invention for road paving will be described later.

[0020] (Thermosetting synthetic resin) The thermosetting synthetic resin (A) used in the present invention can be used without particular limitation as long as it is a thermosetting synthetic resin having two or more polymer groups in the molecule. Examples of the thermosetting synthetic resin (A) include epoxy resins and the like. By using such a thermosetting synthetic resin (A), road paving using the curing agent of the present invention is preferable because it is excellent in durability and heat resistance.

[0021] Further, the thermosetting synthetic resin (A) preferably contains a high-viscosity thermosetting synthetic resin (A-1) having a viscosity of 10,000 to 15,000 mPa·s and a low-viscosity thermosetting synthetic resin (A-2) having a viscosity of 2,000 to 5,000 mPa·s. By mixing and using two types of high-viscosity and low-viscosity thermosetting synthetic resins (A), road paving using the obtained curing agent is more excellent in durability, less likely to form ruts, and can also suppress the scattering of aggregates.

[0022] Furthermore, out of 100% by mass of the thermosetting synthetic resin (A), the content of the high-viscosity thermosetting synthetic resin (A-1) is preferably 50 to 100% by mass, and more preferably 55 to 95% by mass. Also, the content of the low-viscosity thermosetting synthetic resin (A-2) is preferably 50 to 0% by mass, and more preferably 55 to 5% by mass. When the contents of the high-viscosity thermosetting synthetic resin (A-1) and the low-viscosity thermosetting synthetic resin (A-2) are within the above numerical ranges respectively, road paving using the obtained curing agent is more excellent in durability, less likely to form ruts, and can also suppress the scattering of aggregates.

[0023] In addition, from the viewpoint of the strength of road paving, the equivalent of the thermosetting synthetic resin (A) is preferably 150 to 200 g / equivalent, and more preferably 160 to 195 g / equivalent.

[0024] (Fiber) The fibers (B) contained in the solidifying agent according to one embodiment of the present invention include organic fibers (B-1), inorganic fibers (B-2), and organic fibers (B-3). In conventional road pavement hardening agents, the fibers primarily serve as fillers, and typically only one type of fiber is present. However, the hardening agent of the present invention contains three types of fibers: organic fibers (B-1), inorganic fibers (B-2), and organic fibers (B-3). This allows the resulting road pavement to be free from void collapse and exhibit good water permeability. Furthermore, the inclusion of various types of fibers can also improve the strength of the road pavement.

[0025] In addition, there are no particular restrictions on which fibers can be used, as long as they are organic or inorganic fibers. For example, nylon fiber can be used as the organic fiber (B-1), glass fiber as the inorganic fiber (B-2), and polyester fiber as the organic fiber (B-3). The content of organic fibers (B-1) is 3-8% by mass per 100% by mass of thermosetting synthetic resin (A). Additionally, the content of inorganic fibers (B-2) is 3-8% by mass. Furthermore, the content of organic fibers (B-3) is 3-8% by mass. By ensuring that the content of the three types of fibers in fiber (B) is within the above numerical range, the resulting solidifying agent can be used to create road pavement with excellent strength and water permeability.

[0026] Furthermore, organic fibers (B-1) have a length of 0.5-3.0 mm, a thickness of 10-20 μm, and a specific gravity of 0.5-1.5. Inorganic fibers (B-2) have a length of 1.0-4.0 mm, a thickness of 10-20 μm, and a specific gravity of 2.0-3.0. Organic fibers (B-3) have a length of 2.0-5.0 mm, a thickness of 10-20 μm, and a specific gravity of 1.0-1.5. By ensuring that the length, thickness, and specific gravity of the three types of fibers contained in fiber (B) are within the above numerical ranges, the resulting solidifying agent can be used to create road pavement with superior strength and water permeability. The length of each fiber (B) may be predetermined during manufacturing, or it may be used after being cut to the predetermined length during the manufacturing of the solidifying agent.

[0027] (Additives) The additive (C) contained in the solidifying agent preferably contains a dispersant (C-1) and a bulking agent (C-2).

[0028] Dispersants (C-1) promote the dispersion of fibers (B) contained in the solidifying agent, and specific examples include polymeric dispersants. The dispersant (C-1) is preferably present in an amount of 10 to 15% by mass, and more preferably 11 to 14% by mass, relative to 100% by mass of the thermosetting synthetic resin (A). By having a dispersant (C-1) content within the above numerical range, the resulting solidifying agent can be used to create road pavement that does not experience void collapse and has good water permeability.

[0029] The bulking agent (C-2) is used to improve the strength of road pavement using a hardening agent, and specific examples include fine sand. The bulking agent (C-2) is preferably contained in an amount of 15 to 20% by mass relative to 100% by mass of the thermosetting synthetic resin (A). By keeping the content of the bulking agent (C-2) within the above numerical range, the resulting solidifying agent can be used to produce road pavement with superior strength.

[0030] In addition, additive (C) may contain other additives besides the dispersant (C-1) and the bulking agent (C-2), as long as they do not interfere with the effect of the solidifying agent of the present invention.

[0031] <Method for manufacturing solidifying agent> As a method for producing the solidifying agent of the present invention, a general method for producing solidifying agents can be used without particular limitation. Specifically, it can be manufactured by putting a thermosetting synthetic resin (A), fibers (B), and additives (C) into a mixer and mixing them. Preferably, the mixer rotation speed is 100 to 500 rpm and the mixing temperature is around 20 to 30°C.

[0032] <Use of solidifying agent> The solidifying agent of this invention is mainly used for road paving. Specifically, the manufactured solidifying agent can be mixed with a hardening agent, hardening accelerator, and aggregate, stirred, spread on the road, leveled, and then compacted with a roller or similar tool to pave it. In this case, there are no particular restrictions on the aggregate that can be used, as long as it is commonly used for road paving, such as crushed stone, gravel, sea sand, or coal ash.

[0033] Furthermore, the solidifying agent of the present invention can be used not only for road paving but also for solidifying river sludge and coastal sand into blocks, solidifying coal ash, incinerator ash, sludge and hazardous waste, and solidifying various other aggregates. Various materials can be solidified, including wood chips, bamboo charcoal powder, rice husks, tea leaves, coffee grounds, paper scraps, resin cement, oil sand, soil plates, glass powder, and green wood. Roads can be paved by laying blocks made from these materials solidified as aggregate.

[0034] Although the present invention has been described above using 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 will be obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. Furthermore, it is clear from the claims that such modified or improved forms may also be included in the technical scope of the present invention. [Examples]

[0035] The present invention will be described in detail below with reference to examples. However, the present invention is not limited in any way to the examples shown below.

[0036] In Examples 1 to 3, crushed stone blocks were prepared using the solidifying agent of the present invention. The solidifying agent used in each example consisted of 100% by mass of epoxy resin, 3-8% by mass of nylon fibers with a length of 0.5-3.0 mm, a thickness of 10-20 μm, and a specific gravity of 0.5-1.5, 3-8% by mass of glass fibers with a length of 1.0-4.0 mm, a thickness of 10-20 μm, and a specific gravity of 2.0-3.0, 3-8% by mass of polyester fibers with a length of 2.0-5.0 mm, a thickness of 10-20 μm, and a specific gravity of 1.0-1.5, 10-15% by mass of a polymeric dispersant as a dispersant, and 15-20% by mass of fine sand as an extender.

[0037] As Example 1, 467.5g of No. 6 crushed stone, 82.5g of crushed sand (5mm), 2.75g of coal ash, 27.5g of solidifying agent, and 11g of hardening agent (product name: hardening agent) were mixed and hardened into a block, which was used as the crushed stone block of Example 1. Similarly, 467.5g of No. 6 crushed stone, 110g of crushed sand (5mm), 2.75g of coal ash, 27.5g of solidifying agent, and 11g of hardening agent (product name: hardening agent) were mixed and hardened into blocks to form the crushed stone blocks of Example 2. In addition, 550g of dense-graded asphalt mixture, 2.75g of coal ash, 27.5g of solidifying agent, and 11g of hardening agent (product name: hardening agent) were mixed and hardened into blocks to form the crushed stone blocks of Example 3. Each of the crushed stone blocks had dimensions of 100mm x 100mm x 30mm and a mass of 550g.

[0038] Furthermore, 6664g of gravel (7mm), 1666g of fine sand (2mm), 333.2g of solidifying agent, and 133.28g of hardening agent (product name: hardening agent) were mixed and hardened into blocks to form 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 blocks to form the crushed stone block of Example 5. The crushed stone block of Example 4 had dimensions of 300.4mm × 301.4mm × 51.9mm and a mass of 8796g, while the crushed stone block of Example 5 had dimensions of 400mm × 150mm × 50mm and a mass of 6019g.

[0039] <Bending strength test> The crushed stone blocks from Examples 1-3 and asphalt (as a reference value) were each subjected to bending strength tests. In the bending strength test, a specimen with width b and height h was placed on two supports separated by a distance L, and a load was applied perpendicular to the surface of the specimen. The maximum load p applied to the specimen was measured when it finally fractured, and the bending strength fb was calculated using the following formula (1). In Examples 1-3 and the comparison, the width b was 100 mm, the height h was 30 mm, and the distance L between supports was 90 mm. fb = (3 × p × L) / (2 × b × h) 2 )···(1)

[0040] Furthermore, when the crushed stone block of Reference Example 1 (No. 1) using the solidifying agent of the present 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), and from equation (1), fb=6.45 (N / mm). 2 Similarly, when a crushed stone block of Reference Example 2 (No. 2) using the solidifying agent of the present 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), and from equation (1), fb=5.94 (N / mm). 2 ) was calculated as follows. In both of the above reference examples 1 and 2, the crushed stone blocks were tested until the crushed stone fractured (gravel fracture) occurred. The average bending strength of reference examples 1 and 2 was 6.195 (N / mm²). 2 ) was.

[0041] As shown in Figure 1, the measurement results for Examples 1-3 and the comparison sample are as follows: the reference value for asphalt showed adhesive surface fracture at 2.0 kN and a flexural strength of 3.0 N / mm². 2 In contrast, the crushed stone block of Example 1 fractured at 5.3 kN, and its flexural strength was 8.0 N / mm². 2 In Example 2, the crushed stone block fractured at 6.4 kN, and its flexural strength was 9.6 N / mm². 2 In Example 3, the crushed stone block fractured at 7.1 kN, and its flexural strength was 10.7 N / mm². 2and it was confirmed that the crushed stone blocks of Examples 1 to 3 are excellent in strength.

[0042] <Wheel Tracking Test> Next, the crushed stone block of Example 4 and asphalt as a comparative object were each subjected to a wheel tracking test. The test conditions were a running speed of 42 times / minute and a test temperature of 60 ± 0.5°C. As shown in Fig. 1, the results show that while the dynamic stability DS of asphalt, which is the reference value, is 3,000 times / mm, the dynamic stability DS of the crushed stone block of Example 4 is 63,000 times / mm or more, and it was confirmed that the crushed stone block of Example 4 is less likely to form ruts.

[0043] <Labeling Test> Next, the crushed stone block of Example 5 and asphalt (for general roads and highways) as a comparative object were each subjected to a labeling test. The test conditions were a wheel rotation speed of 200 times / minute and a test temperature of -10°C. As shown in Fig. 1, the results show that while the wear amount of asphalt (for general roads), which is the reference value, is 1.3 cm 2 and the wear amount of asphalt (for highways) is 0.9 cm 2 in contrast, the wear amount of the crushed stone block of Example 5 is 0.63 cm 2 and it was confirmed that the crushed stone block of Example 2 is excellent in durability.

[0044] <Twisting Aggregate Scattering Test> Next, the crushed stone block of Example 4 and porous asphalt (mixture H type) as a comparative object were each subjected to a twisting aggregate scattering test. The test is for obtaining the aggregate scattering rate for 120 minutes, and the test temperature was 50 ± 2°C. As shown in Fig. 1, the results show that while the aggregate scattering rate of porous asphalt, which is the reference value, is 15.6%, the aggregate scattering rate of the crushed stone block of Example 4 is 0%, and it was confirmed that the crushed stone block of Example 2 is excellent in durability.

[0045] <Permeability Test> Finally, the crushed stone block from Example 4 and asphalt were subjected to a permeability test as a comparison. As shown in Figure 1, the permeability coefficient of the crushed stone block in Example 4 was 1.7 cm / s, compared to the standard value of 0.15 cm / s for asphalt, confirming that the crushed stone block in Example 2 has superior permeability.

[0046] Based on the above, it has been confirmed that this embodiment provides a solidifying agent that is excellent in durability and heat resistance when used for road paving, prevents rutting, suppresses aggregate scattering, and also has good water permeability.

Claims

1. A solidifying agent comprising a thermosetting synthetic resin (A), fibers (B), and additives (C), Fiber (B) contains organic fiber (B-1), inorganic fiber (B-2), and organic fiber (B-3), The thermosetting synthetic resin (A) contains 3 to 8% by mass of the organic fiber (B-1), 3 to 8% by mass of the inorganic fiber (B-2), and 3 to 8% by mass of the organic fiber (B-3) per 100% by mass of the thermosetting synthetic resin (A). The aforementioned organic fiber (B-1) has a length of 0.5 to 3.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.

5. The inorganic fiber (B-2) has a length of 1.0 to 4.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.

0. The aforementioned organic fiber (B-3) is characterized by having a length of 2.0 to 5.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5, and is a solidifying agent.

2. The thermosetting synthetic resin (A) contains a high-viscosity thermosetting synthetic resin (A-1) with a viscosity of 10,000 to 15,000 mPa·s and a low-viscosity thermosetting synthetic resin (A-2) with a viscosity of 2,000 to 5,000 mPa·s. The solidifying agent according to claim 1, characterized in that of 100% by mass of the thermosetting synthetic resin (A), it contains 50 to 100% by mass of the high-viscosity thermosetting synthetic resin (A-1) and 50 to 0% by mass of the low-viscosity thermosetting synthetic resin (A-2).

3. The aforementioned additive (C) contains a dispersant (C-1) and a bulking agent (C-2), The solidifying agent according to claim 1, characterized in that it contains 10 to 15% by mass of the dispersant (C-1) and 15 to 20% by mass of the bulking agent (C-2) based on 100% by mass of the thermosetting synthetic resin (A).

4. A method for producing a solidifying agent, comprising mixing a thermosetting synthetic resin (A), a fiber (B), and an additive (C) in a mixer, Fiber (B) contains organic fiber (B-1), inorganic fiber (B-2), and organic fiber (B-3), The thermosetting synthetic resin (A) contains 3 to 8% by mass of the organic fiber (B-1), 3 to 8% by mass of the inorganic fiber (B-2), and 3 to 8% by mass of the organic fiber (B-3) per 100% by mass of the thermosetting synthetic resin (A). The aforementioned organic fiber (B-1) has a length of 0.5 to 3.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 0.5 to 1.

5. The inorganic fiber (B-2) has a length of 1.0 to 4.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 2.0 to 3.

0. A method for producing a solidifying agent, characterized in that the organic fiber (B-3) has a length of 2.0 to 5.0 mm, a thickness of 10 to 20 μm, and a specific gravity of 1.0 to 1.5.

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