Container-filled asphalt mixture, method for manufacturing asphalt mixture, and method for manufacturing asphalt paved roads

Abstract

The present invention provides a container-filled asphalt mixture that offers superior convenience. The mixture comprises an asphalt base, an auxiliary agent, and a container 1, the container 1 comprising a base agent storage section 11 and an auxiliary agent storage section 12, the base agent storage section 11 containing the asphalt base, and the auxiliary agent storage section 12 containing the auxiliary agent, the base agent storage section 11 and the auxiliary agent storage section 12 being separated by a boundary section 14, the boundary section 14 being rupturable by pressurization, and when the boundary section 14 is ruptured, the base agent storage section 11 and the auxiliary agent storage section 12 become connected, and the asphalt base and auxiliary agent can be mixed.

Description

Technical Field

[0006] , ,

[0001] The present disclosure relates to a container-filled asphalt mixture, a method for manufacturing an asphalt mixture, and a method for manufacturing an asphalt-paved road.

Background Art

[0002] The asphalt mixture used for road paving is heated to a flowable state, transported to the construction site in a flowable state, and constructed in a flowable state. Therefore, the transportation time and the construction time are limited to a short time. On the other hand, Patent Document 1 discloses an asphalt mixture that can be constructed at normal temperature and exhibits high strength early after construction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the asphalt mixture of Patent Document 1 can be constructed at normal temperature, it is more convenient than heated asphalt, but further convenience is required.

[0005] Therefore, an object of the present disclosure is to provide a container-filled asphalt mixture excellent in convenience, a method for manufacturing an asphalt mixture using the same, and a method for manufacturing an asphalt-paved road.

Means for Solving the Problems

[0006] In order to achieve the above object, the container-filled asphalt mixture of the present disclosure includes an asphalt base, an auxiliary agent, and a container, the asphalt base includes asphalt, aggregate, and lipid, The aforementioned auxiliary agent includes an alkaline additive and an ionizing agent. The ionizing agent is capable of ionizing the alkaline additive. The ionized alkaline additive is capable of saponifying the lipids, The container includes a main ingredient storage section and an auxiliary ingredient storage section. The main component container holds the asphalt main component, The aforementioned auxiliary agent is contained in the auxiliary agent container, The main ingredient containment section and the auxiliary ingredient containment section are separated by a boundary section. The boundary portion is rupturable by pressure, If the boundary portion is damaged, the main agent container and the auxiliary agent container become connected, and the asphalt main agent and the auxiliary agent can be mixed. This is a container-filled asphalt mixture.

[0007] The method for producing the asphalt mixture described herein is: In the container of the container-filled asphalt mixture of the present disclosure, a boundary rupture step is performed to break the boundary by pressurizing, thereby connecting the main component container and the auxiliary component container, and The container in which the boundary portion is damaged includes a mixing step of mixing the asphalt main agent and the auxiliary agent to produce an asphalt mixture, This is a method for producing asphalt mixtures.

[0008] The method for manufacturing an asphalt paved road described herein is: The method for producing the asphalt mixture according to the present disclosure includes a supply step of supplying the asphalt mixture to the paving site by opening a portion of the container. This is a method for manufacturing asphalt paved roads. [Effects of the Invention]

[0009] According to this disclosure, it is possible to provide a container-filled asphalt mixture with excellent convenience, a method for producing an asphalt mixture using the same, and a method for producing an asphalt paved road. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a diagram showing an example of a container-filled asphalt mixture according to this disclosure. [Figure 2] Figure 2 is a cross-sectional view showing an example of a container-filled asphalt mixture according to the present disclosure. [Figure 3] Figure 3 is a diagram showing a damaged boundary in an example of the container-filled asphalt mixture of this disclosure. [Figure 4] Figure 4 is a diagram showing an example of the container-filled asphalt mixture of this disclosure, with an opening formed in the container. [Modes for carrying out the invention]

[0011] Next, embodiments of the present disclosure will be described. The present disclosure is not limited to the following embodiments. In the following figures, the same parts are denoted by the same reference numerals. Furthermore, unless otherwise specified, the descriptions of each embodiment can be used interchangeably with those of the others, and unless otherwise specified, the configurations of each embodiment can be combined.

[0012] In the container-filled asphalt mixture of the present disclosure, the alkaline additive may contain calcium hydroxide, and the ionizing agent may contain water. According to this embodiment, the lipids can be saponified in a short time, and as a result, the asphalt mixture can be hardened in a short time.

[0013] In the container-filled asphalt mixture of this disclosure, the lipid may include fatty acids.

[0014] In the container-filled asphalt mixture of the present disclosure, the container is a bag formed from a resin film. The accommodating portion of the bag is partitioned by the boundary portion to form the main agent accommodating portion and the auxiliary agent accommodating portion. The boundary portion is formed by sealing the resin films forming the bag to each other, and the sealing strength of the boundary portion may be lower than that of portions of the bag other than the boundary portion. In this aspect, the bag may be formed by sealing the peripheral and boundary portions of two resin films to each other.

[0015] In the method for producing the asphalt mixture of the present disclosure, the pressurization in the boundary portion breaking step and the mixing in the mixing step may be performed manually.

[0016] In the present disclosure, the asphalt main agent contains asphalt, aggregate, and lipid. Also, in the present disclosure, the asphalt main agent may contain a filler. The filler may be included in the auxiliary agent.

[0017] In the present disclosure, the asphalt is not particularly limited, and examples include straight asphalt and modified asphalt.

[0018] In the present disclosure, the aggregate may be a new aggregate or a recycled aggregate. Examples of the new aggregate include crushed stone, gravel, and sand. Examples of the recycled aggregate include recycled aggregate produced from construction waste materials. Examples of the construction waste materials include asphalt pavement waste materials excavated by road construction or the like, and concrete waste materials (crushed stone) of demolished buildings.

[0019] Examples of crushed stone include single-sized crushed stone (No. 1 to No. 7), crushed stone run (C-20 to C-40), and graded crushed stone (M-25 to M-40) as specified in JIS A5001:2008. Standard products include crushed stone for concrete as specified in JIS A5005:2020. It is also possible to use non-standard crushed stone similar to these as crushed stone.

[0020] Examples of crushed sand include concrete crushed sand as specified in JIS A5005:2020. It is also possible to use materials that do not meet the specifications of crushed sand as crushed sand.

[0021] Examples of recycled aggregates include concrete-grade recycled aggregates H, M, and L, as specified in JIS A5021:2018, JIS A5022:2018, and JIS A5023:2018, respectively. It is also possible to use non-standard recycled aggregates similar to these as recycled aggregates.

[0022] Examples of recycled crushed stone include recycled crushed stone made from recycled crushed stone and graded crushed stone (e.g., RC-40), and recycled graded crushed stone (e.g., RM-30).

[0023] Examples of the aforementioned lipids include oils and fats and fatty acids.

[0024] Fats and oils are a general term for fats that are solid at room temperature (e.g., meat fat and lard) and oils that are liquid at room temperature (e.g., corn oil and soybean oil). Fats and oils include fatty acid esters, such as esterified glycerol and fatty acids (triglycerides, etc.).

[0025] Examples of fatty acids include saturated fatty acids and unsaturated fatty acids, with examples of saturated fatty acids including branched saturated fatty acids. These fatty acids may be monomers, or polymers such as dimers and trimers. Furthermore, these fatty acids may be mixtures.

[0026] Examples of saturated fatty acids include those with 6 to 30 carbon atoms, such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, and stearic acid.

[0027] Examples of branched saturated fatty acids include those with 6 to 30 carbon atoms. Examples of branched saturated fatty acids with 6 to 30 carbon atoms include isoheptanoic acid, octic acid, isononanoic acid, isodecylic acid, isotridecylic acid, isopalmitic acid, isostearic acid, and isomistyric acid.

[0028] Examples of unsaturated fatty acids include oleic acid, linoleic acid, linolenic acid, and arachidonic acid.

[0029] Saturated and unsaturated fatty acids may be used individually or as a mixture of two or more types. Furthermore, as fatty acids, for example, mixed oils of biological origin such as tall oil, olive oil, rapeseed oil, soybean oil, corn oil, safflower oil, and fish oil may be used.

[0030] There are no particular restrictions on the mixing ratio of asphalt, aggregate, and oils and fats. The weight ratio of binder B (total of asphalt and oils and fats) to aggregate A (A:B) is, for example, in the range of 90:10 to 97:3, and the weight ratio of asphalt As to oils and fats F (As:F) is, for example, in the range of 10:90 to 80:20.

[0031] In this disclosure, the filler is a fine aggregate, for example, fine particles that pass through a 75 μm sieve. Examples of fillers include limestone and igneous rock powder, slaked lime, cement, and fly ash. The main component of limestone powder is calcium carbonate. The mixing ratio of the filler is not particularly limited, for example, by weight, the ratio of asphalt base:filler = 100:0 to 90:10.

[0032] The asphalt base can be manufactured, for example, by mixing heated aggregate with heated asphalt in a mixing device, and then adding and mixing lipids (and fillers as needed). The heating temperature of the aggregate is, for example, 100 to 170 degrees Celsius, and the heating temperature of the asphalt is, for example, 130 to 170 degrees Celsius.

[0033] In this disclosure, the auxiliary agent includes an alkaline additive and an ionizing agent. The ionizing agent ionizes the alkaline additive. The ionized alkaline additive saponifies lipids and hardens them. In the case of oils and fats, saponification can occur, for example, with the alkaline additive, as fatty acid glycerol esters (e.g., triglycerides), a reaction that produces an alkali salt of the fatty acid and glycerol. In the case of fatty acids, saponification can occur with the alkaline additive, as fatty acid alkali salt and water. The main component of asphalt containing lipids is in a flowable state, but when the lipids are saponified by the ionized alkaline additive, the fluidity of the asphalt and aggregate is lost and it hardens.

[0034] Examples of alkaline additives include potassium hydroxide, sodium hydroxide, calcium hydroxide, magnesium hydroxide, potassium bicarbonate, and sodium bicarbonate. Alternatively, a mixture such as cement may be used as the alkaline additive. The ionizing agent is not particularly limited as long as it can ionize the alkaline additive; for example, water. The water is not particularly limited and may be, for example, tap water, rainwater, well water, distilled water, or deionized water.

[0035] The form of the aforementioned additive may be, for example, an aqueous solution of the alkaline additive or a dispersion of the alkaline additive in water, or in other words, in the form of water containing an alkaline additive. Specifically, this includes water containing potassium hydroxide, water containing sodium hydroxide, water containing calcium hydroxide, water containing magnesium hydroxide, water containing potassium bicarbonate, water containing sodium bicarbonate, and water containing cement.

[0036] The mixing ratio of the alkaline additive and water is, for example, in the range of 1:0.1 to 1:90 by weight.

[0037] Auxiliary agents can be manufactured, for example, by mixing an alkaline additive with an ionizing agent.

[0038] Next, an example of the container-filled asphalt mixture of this disclosure will be described based on Figures 1 to 4.

[0039] Figure 1 is a front view diagram showing an example of a container, and Figure 2 is a longitudinal cross-sectional view of the container (cross-sectional view in direction II of Figure 1). As shown in Figures 1 and 2, the container 1 is a bag made of resin film, formed by overlapping two rectangular resin films and sealing their periphery, with 13 being the periphery seal portion. Inside the container (bag) 1, the resin films are sealed to each other to form a boundary portion 14 (boundary seal portion), and the boundary portion 14 divides the inside of the bag into a main agent storage portion 11 (lower side in Figure 1) and an auxiliary agent storage portion 12 (upper side in Figure 1). The relative positions of the main agent storage portion 11 and the auxiliary agent storage portion 12 are not particularly limited, and they may be arranged upside down in Figure 1. In this disclosure, for example, the main agent storage portion 11 and the auxiliary agent storage portion 12 may each be divided into multiple storage portions.

[0040] The aforementioned resin film may be, for example, a laminated resin film in which a resin film substrate layer and a sealant layer are laminated. Examples of materials for forming the resin film substrate layer include polyester (PET), stretched polypropylene (OPP), and polyamide (PA), and examples of materials for forming the sealant layer include polyolefin, with specific examples being polyethylene (PE) and unstretched polypropylene (CPP). The laminated resin film may also have functional layers such as a gas barrier layer and a light-shielding layer laminated to it. The laminated resin film may be laminated using an adhesive, by heat sealing, or by co-extrusion molding. The thickness of the resin film substrate layer is, for example, in the range of 3 to 200 μm, the thickness of the sealant layer is, for example, in the range of 0.1 to 50 μm, and the thickness of the functional layer is, for example, in the range of 0.01 to 50 μm.

[0041] In the container (bag) 1, the sealing of the peripheral seal portion 13 and the boundary portion 14 can be carried out by, for example, heat sealing by heating, sealing with adhesive, etc. The seal strength of the boundary portion 14 is set lower than, for example, the seal strength of the peripheral seal portion 13. Preferably, the seal strength of the peripheral seal portion 13 is strong enough so that the seal does not break during storage, transportation, and manual pressure, while preferably, the seal strength of the boundary portion 14 is strong enough so that the seal does not break during storage and transportation, but breaks when manual pressure is applied. The seal strength of the peripheral seal portion 13 is, for example, 40 N / 15 mm or more, for example, 40 to 120 N / 15 mm, for example, 40 to 80 N / 15 mm. The seal strength of the boundary portion 14 is, for example, 5 to 25 N / 15 mm, for example, 10 to 25 N / 15 mm, for example, 10 to 23 N / 15 mm. The sealing strength of the peripheral seal portion 13 and the boundary portion 14 can be measured, for example, in accordance with JIS Z1707, under conditions of a peeling angle of 90 degrees and a tensile speed of 300 mm / min.

[0042] The asphalt main component and auxiliary component can be filled into the container (bag) 1, for example, as follows. First, two rectangular resin films are overlapped, and the left and right peripheral seal portions 13 and the boundary portion 14 are sealed to form a bag with top and bottom openings. Then, the auxiliary component is filled into the auxiliary component storage portion 12 from the top opening, and the asphalt main component is filled into the main component storage portion 11 from the bottom opening. After that, the top and bottom peripheral portions of the bag are sealed to form peripheral seal portions 13, closing the top and bottom openings. Alternatively, two rectangular resin films can be overlapped, and the left, right, and bottom peripheral portions are sealed to form peripheral seal portions 13, forming a bag with an top opening. Then, the asphalt main agent is filled into the main agent storage section 11 through the upper opening, and then the approximate center of the bag is sealed in a linear fashion to form a boundary section 14, after which the auxiliary agent is filled into the auxiliary agent storage section 12 through the upper opening, and then the periphery of the upper opening is sealed to form a periphery seal section 13 and close the bag.

[0043] Next, an example of paving using the container-filled asphalt mixture of this disclosure will be described based on Figures 3 and 4. First, as shown in Figure 3, the boundary portion 14 is damaged (broken) by applying pressure to the container (bag) 1 by pressing it with your hand. This creates a communication between the main component container 11 and the auxiliary component container 12. In this state, the asphalt main component and auxiliary component are mixed inside the container (bag) 1 by kneading or shaking it with your hand to produce the asphalt mixture. Then, the bottom of the container (bag) 1 is opened with scissors or the like to form an opening 15, and the asphalt mixture is supplied to the paving area from the opening 15. The supplied asphalt mixture is leveled with a roller or trowel. In the supplied asphalt mixture, the lipids are saponified by the ionized alkaline additives, and as a result, the asphalt mixture hardens and gains strength. The opening at the bottom of container (bag) 1 may be formed, for example, by creating a pre-cut slit and then tearing the resin film by hand along the slit.

[0044] The total amount of asphalt base and auxiliary agents (amount of asphalt mixture) contained in the container is not particularly limited, but is a portable amount, for example, 0.5 to 5 kg. A portable amount allows, for example, highway and general road patrol officers to carry the container-filled asphalt mixture of this disclosure in their patrol vehicles and repair any repair locations on the spot. Furthermore, the container-filled asphalt mixture of this disclosure is highly convenient because, for example, it also contains water as an ionizing agent, eliminating the need to separately prepare water during repairs. Additionally, the container-filled asphalt mixture of this disclosure allows for mixing of the asphalt base and auxiliary agents within the container, preventing hands from getting dirty, thus offering superior convenience.

[0045] The container-filled asphalt mixture of this disclosure contains the asphalt main component and auxiliary components in separate compartments. Therefore, it has the advantage of being able to be stored for a long period, for example, because it can prevent hardening due to the influence of moisture contained in the asphalt and aggregate during storage. Furthermore, because hardening during storage is prevented, highly reactive alkaline additives such as calcium hydroxide can be used, thus enabling quick hardening after application.

[0046] (Examples) Next, embodiments of the present disclosure will be described. The present disclosure is not limited to or restricted by the embodiments described below.

[0047] Asphalt main component with the composition shown in Table 1 below was prepared. [Table 1] Crushed stone No. 7: Classification according to JISA5001 Crushed sand, coarse sand, fine sand: "Fine aggregate" as defined in JIS A0203 StAs: Straight Asphalt 60 / 80 Fatty acids: Product number PM500, manufactured by Miyoshi Oil & Fat Co., Ltd.

[0048] Alkaline additives (ordinary Portland cement) and water were added to the asphalt base in the specified proportions and mixed in a bag to produce an asphalt mixture. The produced asphalt mixture was compacted to create test samples (test specimens), and the Marshall stability of the test samples was measured. The measurement conditions for Marshall stability were a curing temperature of 20 degrees Celsius, a curing time of 1 hour, and a test temperature of 20 degrees Celsius. The proportions of alkaline additives and water, as well as the measurement results of Marshall stability, are shown in Table 2 below. A higher measured Marshall stability value indicates that the test sample yielded a stable and high-strength hardened product in a shorter time. [Table 2]

[0049] As shown in Table 2, when water or alkaline additives were present at 0%, the Marshall stability was low, around 1.0. On the other hand, as shown in Table 2, when the water content was 1% or more and the alkaline additive content was 10% or more, a high Marshall stability was obtained, and it was confirmed that the Marshall stability tended to increase as the alkaline additive content increased.

[0050] Although the present disclosure has been described above with reference to embodiments, the present disclosure is not limited to the embodiments described above. Various modifications to the structure and details of the present disclosure are possible, as can be understood by those skilled in the art within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0051] This application claims priority based on Japanese Patent Application No. 2025-005747, filed on 15 January 2025, and incorporates all of its disclosures herein. [Industrial applicability]

[0052] This disclosure provides a convenient container-filled asphalt mixture. According to this disclosure, for example, damaged sections of roads can be easily repaired during routine inspections by road inspectors on expressways and general roads. [Explanation of Symbols]

[0053] 1 container (bag) 11 Main ingredient storage section 12. Auxiliary drug storage section 13 Peripheral sealing portion 14 Boundary 15 Opening

Claims

1. Including asphalt main agent, auxiliary agent, and container, The aforementioned asphalt main component comprises asphalt, aggregate, and lipids. The aforementioned auxiliary agent includes an alkaline additive and an ionizing agent. The ionizing agent is capable of ionizing the alkaline additive. The ionized alkaline additive is capable of saponifying the lipids, The container includes a main ingredient storage section and an auxiliary ingredient storage section. The main component container holds the asphalt main component, The aforementioned auxiliary agent is contained in the auxiliary agent container, The main ingredient containment section and the auxiliary ingredient containment section are separated by a boundary section. The boundary portion is rupturable by pressure, If the boundary portion is damaged, the main agent container and the auxiliary agent container become connected, and the asphalt main agent and the auxiliary agent can be mixed. Container-filled asphalt mixture.

2. The aforementioned alkaline additive contains calcium hydroxide, The ionizing agent contains water, The container-filled asphalt mixture according to claim 1.

3. The aforementioned lipids include fatty acids. The container-filled asphalt mixture according to claim 1.

4. The container is a bag formed from a resin film, The storage portion of the bag is partitioned by the boundary portion, forming the main ingredient storage portion and the auxiliary ingredient storage portion. The boundary portion is formed by sealing the resin films forming the bag body together. The sealing strength of the boundary portion is lower than that of the portion of the bag body other than the boundary portion. The container-filled asphalt mixture according to claim 1.

5. The bag is formed by sealing the peripheral and boundary portions of the two resin films together. The container-filled asphalt mixture according to claim 4.

6. The container of the container-filled asphalt mixture according to claim 1, comprising a boundary rupture step in which the boundary portion is damaged by pressurization to connect the main agent container and the auxiliary agent container, The container in which the boundary portion is damaged includes a mixing step of mixing the asphalt main agent and the auxiliary agent to produce an asphalt mixture, A method for producing asphalt mixtures.

7. The pressurization in the boundary damage step and the mixing in the mixing step are performed manually. A method for producing the asphalt mixture according to claim 6.

8. The method for producing an asphalt mixture according to claim 6 includes a supply step of supplying the asphalt mixture produced by opening a portion of the container to the area to be paved. A method for manufacturing asphalt paved roads.

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