Containerized road repair material and road repair method

Abstract

To provide a containerized road repair material capable of repairing cracks in a road simply and in a short time, and which is convenient to carry, store and use. [Solution] This is a road repair material that hardens by mixing two liquids, a base agent and a hardener, and is provided in a container 16 equipped with an outer bag 12 having a discharge portion 24 that is sealed so as to be openable, and an inner bag 14 that is contained within the outer bag 12 and breaks when pressure is applied from outside the outer bag 12. Either a liquid base agent 18 or a hardener 20 is sealed within the outer bag 12, and the other of the liquid hardener 20 or base agent 18 is sealed within the inner bag 14.

Description

[Technical field]

[0001] The present invention relates to a containerized road repair material used for repairing cracks in roads. [Background technology]

[0002] In recent years, many roads are paved with asphalt or concrete, but cracks can occur due to aging, fatigue, earthquakes, the passage of heavy vehicles, etc. If cracks in the road are left unattended, they can cause damage to vehicles and accidents, and can even lead to the cracks expanding, so they are repaired using repair materials for safety and road preservation.

[0003] As a repair material for repairing cracks in roads, for example, a two-part mixed type repair material is known (see, for example, Patent Document 1). The two-part mixed type repair material is made by mixing a base agent and a hardener on-site, injecting the mixture into the cracks in the road using an injector or the like, and then hardening at room temperature for a predetermined period of time. This two-part mixed type repair material does not require special heating machines, tools, etc., is relatively easy to handle, and can be applied in a short time, and is therefore used in a variety of fields. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP2017-014741A Summary of the Invention [Problem to be solved by the invention]

[0005] However, with two-liquid mixed repair materials, the base agent and hardener must be placed in separate containers, and these two containers must be transported to the site, and the two liquids must be mixed into one of the containers or into the other mixing container, then transferred to an injector and injected. This requires storing and managing two types of containers, transporting them to the site, and requires a lot of labor, time, and effort. In addition, there are problems such as the need to adjust the mixed amount and the risk of the liquid being damaged when transferring.

[0006] To solve the above problems, the present invention aims to provide a containerized road repair material that can repair cracks in roads easily and in a short time, is convenient to carry and store, and is easy to use. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a method for curing a coating composition comprising a base agent and a curing agent, which is cured by mixing two liquids. Made of polyurea resin A road repair material having an openable and sealed discharge portion A flexible low density polyethylene layer is included. An outer bag and a bag that is housed in the outer bag and breaks when pressure is applied from the outside of the outer bag. A flexible low density polyethylene layer is included. The present invention provides a road repair material in a container in which either a liquid base agent or a hardener is sealed in an outer bag of a container having an inner bag and the other of the liquid hardener or the base agent is sealed in the inner bag.

[0008] In addition, the outer bag may be constructed with a layer structure in the following order from the outer layer side to the inner layer side: transparent vapor-deposited polyethylene terephthalate, dry laminate, nylon, dry laminate, and low-density polyethylene, while the inner bag may be constructed with a layer structure in the following order from the outer layer side to the inner layer side: low-density polyethylene, dry laminate, and polyethylene film using a polyolefin-based polymer alloy adhesive chemically modified with a polymerizable vinyl monomer.

[0009] Furthermore, the present invention relates to a road repair method using a road repair material made of a polyurea resin or epoxy resin that hardens when two liquids, a base agent and a hardener, are mixed together, and the road repair material in a container is prepared, the container comprising an outer bag including a low-density polyethylene layer having an outlet portion sealed so as to be openable, and an inner bag including a low-density polyethylene layer that is contained within the outer bag and is broken by pressure from the outside of the outer bag, the outer bag containing either a liquid base agent or a hardener, and the inner bag containing a liquid hardener or the other of the base agent, and when repairing cracks in a road, the inner bag is broken by pressure from the outside of the outer bag, causing the liquid in the inner bag to flow out into the outer bag, mixing the base agent and the hardener, and the mixed liquid of the base agent and the hardener is injected into the cracks in the road from the outlet portion of the outer bag, and the injected mixed liquid is hardened at room temperature to repair the cracks in the road. Effect of the Invention

[0010] According to the containerized road repair material of the present invention, the road repair material is hardened by mixing two liquids, a main agent and a hardener, and has an outer bag having an outlet part sealed so as to be openable, and an inner bag housed in the outer bag and broken by pressure from the outside of the outer bag. Either the liquid main agent or the hardener is sealed in the outer bag, and the other liquid hardener or the main agent is sealed in the inner bag. Therefore, it can be easily carried to the site, and the main agent in the outer bag and the hardener in the inner bag can be easily mixed by applying pressure from the outside of the outer bag of the container to break the inner bag, and then the mixed material can be discharged from the outlet part and injected into the cracks in the road. As a result, it is possible to provide a containerized repair material that can easily and quickly carry out repair work on road cracks, improve construction efficiency, reduce waste, and reduce environmental load, compared to a case in which the two liquids are each placed in separate containers.

[0011] Furthermore, by configuring the outer bag as a self-supporting bag with a bottom gusset, the container containing the repair material can be placed upright, for example, during storage or transportation, or during repair work, thereby improving usability.

[0012] In addition, the inner bag has a portion of its peripheral edge welded to the outer bag, and the other portion of its peripheral edge is provided with a bag-breaking seal portion which has a weaker welding strength than the welded portion to the outer bag. This makes it easy to mix the base agent and hardener, and also makes it easy to discharge the mixed material from the discharge portion for application, etc.

[0013] In addition, the outer bag and inner bag are made of a transparent material, and a coloring agent is mixed into the main agent enclosed in the outer bag, so that repairs can be made with a repair material of a color that corresponds to the color of the road, such as asphalt, and since the liquid material on the outer bag side is colored, the mixed state is easy to grasp to some extent, making it easy to use.

[0014] In addition, the discharge part of the outer bag is configured so that the cap that seals the discharge part and the discharge nozzle are removable and replaceable, which makes it possible to prevent unmixed main agent from entering the discharge nozzle when mixing and when injecting, and ensures that the appropriately contained volumes of main agent and hardener are mixed and injected.

[0015] In addition, the discharge part of the outer bag has a closed discharge nozzle and is configured so that it can be discharged by opening a portion of it, which allows smooth injection without the need to replace the bag after mixing, making it easy to use. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a front view illustrating a containerized road repair material according to one embodiment of the present invention. [Diagram 2] FIG. 2 is an explanatory cross-sectional view taken along line AA of a containerized road repair material according to one embodiment of the present invention. [Diagram 3] FIG. 2 is an explanatory diagram of the action when mixing the base agent and hardener of the container-packed road repair material of FIG. 1. [Figure 4] FIG. 2 is an explanatory diagram of the action of the containerized road repair material of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the packaged road repair material of the present invention will be described with reference to the attached drawings. The packaged road repair material of the present invention is a repair material for repairing cracks in roads, and can be used in a packaged state.

[0018] Figures 1 to 4 show one embodiment of the packaged road repair material of the present invention. Figures 1 and 2 show a packaged road repair material 10 according to this embodiment, which is configured by a container 16 having an outer bag 12 and an inner bag 14, with a base agent 18 sealed in the outer bag 12 and a hardener 20 sealed in the inner bag 14.

[0019] The repair material is a two-liquid room temperature curing repair material that cures at room temperature by mixing a base agent 18 and a hardener 20. In this embodiment, the repair material is made of, for example, a polyurea resin that is excellent in durability, abrasion resistance, water resistance, heat resistance, chemical resistance, and crack tracking. Therefore, the base agent 18 of the repair material is made of, for example, a liquid polyamine-based base agent that is a mixture of 3,3'-dichloro-4,4'-diaminodiphenylmethane, carbon black as a coloring agent, and 2-ethylhexanoic acid. The hardener 20 is made of, for example, a liquid polyisocyanate-based hardener that is a mixture of diisononyl phthalate and 1,1'methylene bis(isocyanatobenzene). The base agent 18 and the hardener 20 are set in a state where they are separated into the outer bag 12 and the inner bag 14 of the container 16 so that they are mixed at a weight ratio of 1:1.

[0020] The mixture of the base agent 18 and the hardener 20 as described above has a low viscosity before hardening, so it can be smoothly injected into cracks in the road, and at the same time, it hardens in a relatively short time of about one to several hours at room temperature to become a polyurethane resin repair material. Note that the road repair material is not limited to polyurethane resin, and may be any other repair material such as epoxy resin, and the base agent and hardener that make up these repair materials may be selected.

[0021] The container 16 has a double bag structure having an outer bag 12 and an inner bag 14, and is a storage bag that can store the main agent 18 and the hardener 20 in a separate state in one bag-like container. In this embodiment, the main agent 18 of the repair material is sealed inside the outer bag 12 and on the outside of the inner bag 14, and the hardener 20 of the repair material is sealed inside the inner bag 14. It is also possible to store the hardener 20 in the outer bag 12 and the main agent 18 in the inner bag 14.

[0022] In this embodiment, the outer bag 12 is formed by sealing the periphery of a flexible film made of synthetic resin such as polyethylene by welding or the like to form a bag, and is a transparent bag that allows the inside to be seen. The outer bag 12 preferably includes a low-density polyethylene layer. Furthermore, the outer bag 12 preferably has a layer structure in which, from the outer layer side to the inner layer side, a transparent vapor-deposited polyethylene terephthalate, a dry laminate, nylon, a dry laminate, and a low-density polyethylene are layered in this order.The outer bag 12 is provided with a bottom gusset 22 on the side that becomes the bag bottom, and the outer bag 12 is a self-supporting bag that stands on the floor or ground via the bottom gusset 22. Therefore, the outer bag 12 is provided with a discharge part 24 on the upper end side opposite the bottom gusset 22. The discharge part 24 communicates the inside and outside of the outer bag 12, and is a means for discharging the liquid material inside the outer bag 12. As shown in FIG. 4, for example, a cap 26 and a discharge nozzle 28 are attached to the discharge part 24 in a detachable and replaceable manner. In this embodiment, the detachable configuration of the discharge part 24 and the cap 26 or the discharge nozzle 28 is, for example, a male screw part formed on the outer periphery of the discharge part 24, and a female screw part formed on the inside of the cap 26 and the discharge nozzle 28, so that they can be detached and replaced by screwing together.

[0023] In this embodiment, before use and when mixing the base agent and hardener in the container, the cap 26 is attached to the discharge part 24. This effectively prevents unmixed base agent or hardener from remaining in the discharge nozzle 28 when mixing the base agent and hardener. When injecting the mixture into cracks in the road after mixing the base agent and hardener, the cap 26 is removed and replaced with the discharge nozzle 28 with an open tip, which can then be attached to perform the injection work.

[0024] The discharge nozzle 28 may be configured such that the tip is sealed and is attached in advance to the discharge part 24. In this case, the tip of the discharge nozzle 28 is kept closed before use and when the base agent and the hardener in the container are mixed, and the tip of the discharge nozzle 28 may be cut or otherwise opened to discharge the mixed liquid when the mixed liquid of the base agent and the hardener is injected.

[0025] The inner bag 14 is made of a flexible film made of synthetic resin such as polyethylene, and is a transparent bag that allows the inside to be seen. The inner bag 14 may include a low-density polyethylene layer. Furthermore, the inner bag 14 may be configured in the following layer structure from the outer layer side to the inner layer side: low-density polyethylene, dry laminate, and polyethylene film using a polyolefin-based polymer alloy adhesive chemically modified with a polymerizable vinyl monomer.In this embodiment, the inner bag 14 is formed into a bag shape by welding, for example, the periphery of a flexible film, and the welded part on the bottom side is fixed to the welded part 30 on the bottom gusset side of the outer bag 12. The welded part on the upper end side of the inner bag 14 or the welded parts on the three sides excluding the bottom side are formed in a low adhesion state that is relatively easy to break. In other words, the upper peripheral part of the inner bag is provided with a bag-breaking seal part 32 that has a weaker welding strength than the welded part 30 with the outer bag. Therefore, when pressure is applied from the outside to the inner bag 14 with the hardener 20 sealed inside, the outward pressure of the hardener 20 causes the low adhesion welded part to break, and the hardener 20 flows out to the outside of the inner bag 14 and is mixed with the main agent in the outer bag 12.

[0026] When the containerized road repair material 10 of this embodiment is used and road repair methods The containerized road repair material 10 contains the main agent and hardener separately in one double-bag container before use, which eliminates the need to manage and transport two types of containers as in the past, making it convenient in terms of storage, management and transport. When using it at a site where cracks have occurred in the road, as shown in Figure 3, a worker applies strong pressure with his / her hand from the outside of the outer bag 12, causing the bag-breaking seal portion 32 of the inner bag 14 contained within the outer bag 12 to break and tear the bag. When the inner bag 14 is broken within the outer bag 12, the hardener sealed within the inner bag 14 flows out into the outer bag 12, and the main agent and hardener are mixed. The worker can then knead or loosen the material with his / her hands, ShakeThe base agent and the hardener are thoroughly mixed in the outer bag 12 while being mixed with each other. Then, as shown in FIG. 4, the cap 26 is removed from the discharge part 24 and the discharge nozzle 28 is attached. The tip of the discharge nozzle 28 is cut and opened, and the mixed liquid of the base agent and the hardener is injected into the cracks in the road from the tip of the discharge nozzle 28 of the outer bag 12. After that, the mixture is cured at room temperature for about one to several hours, and the mixed liquid hardens and repairs the cracks as a repair material. In this way, since it is possible to mix and inject in one container when using it, there is no need to prepare two types of containers for the base agent and the hardener or to transfer the liquid to another container as in the conventional method, and there is no need to be careful about spilling or handling, and the cracks in the road can be repaired with a simple operation and in a short time. In addition, since only one bag-shaped container remains after construction, it can be carried away in a compact state and can be easily disposed of.

[0027] The containerized road repair material of the present invention described above is not limited to the configuration of the above-mentioned embodiment, and any modification may be made without departing from the essence of the present invention described in the claims. [Explanation of symbols]

[0028] 10. Containerized road repair materials 12 Outer bag 14 Inner bag 16 Container 18 Main Agent 20 Hardener 22 Bottom gusset 24 Discharge part 26 Cap 28 Discharge Nozzle 32 Bag-breaking seal

Claims

1. This is a road repair material made of a polyurethane resin that hardens when two liquids, a base agent and a hardener, are mixed together. a flexible outer bag including a low density polyethylene layer having an openably sealed discharge portion; A containerized road repair material, characterized in that either a liquid base agent or a hardener is sealed in the outer bag of a container having a flexible inner bag containing a low-density polyethylene layer that is contained in the outer bag and breaks when pressure is applied from the outside of the outer bag, and the other of the liquid hardener or the base agent is sealed in the inner bag.

2. The outer bag is constructed of layers in the following order from the outer layer side to the inner layer side: transparent vapor-deposited polyethylene terephthalate, dry laminate, nylon, dry laminate, and low-density polyethylene; and A containerized road repair material as described in claim 1, characterized in that the inner bag is composed of layers, from the outer layer to the inner layer, of low-density polyethylene, dry laminate, and polyethylene film using a polyolefin polymer alloy adhesive chemically modified with a polymerizable vinyl monomer, in that order.

3. A road repair method using a road repair material made of a polyurea resin or epoxy resin that hardens when two liquids, a base agent and a hardener, are mixed, A container-packed road repair material is prepared, the container comprising a flexible outer bag including a low-density polyethylene layer having an openable sealed discharge portion, and a flexible inner bag that is housed in the outer bag and includes a low-density polyethylene layer and is ruptured by pressure from the outside of the outer bag, the container containing either a liquid base agent or a hardener being sealed in the outer bag, and the inner bag containing the other liquid hardener or base agent, When repairing cracks in the road, The inner bag is ruptured by applying pressure from the outside of the outer bag, causing the liquid in the inner bag to flow out into the outer bag, and the base agent and hardener are mixed. A mixture of the base agent and hardener is injected into the cracks in the road through the outlet of the outer bag, The road repair method comprises hardening the injected mixed liquid at room temperature to repair the cracks in the road.

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