JP2004183356A - Floor panel waterproofing construction method of pavement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor slab waterproofing construction method for a paved road excellent in adhesion of a waterproof layer and an asphalt pavement layer and excellent in workability because there is no restriction in the application time of an adhesive and a drying curing time is not required when an asphalt emulsion is used as an adhesive. <P>SOLUTION: In this floor slab waterproofing construction method, after a synthetic resin or the like is applied on a floor slab face of a paved road such as a concrete road and a waterproof layer is formed, an asphalt paved layer is formed on the waterproof layer. In this method, a granular material or a sheet-like material of a thermosetting resin molten/fluidized by heating and cured is disposed on the surface of the waterproofing layer to form an asphalt pavement layer. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【００２９】
【発明の効果】
本発明の床版防水施工法によれば熱硬化性樹脂粒状物等の配置という簡単な施工操作で床版上の防水層とアスファルト層間の必要とされる接着力すなわち各道路公団規格にある２０℃における接着強度０．６Ｎ／ｍｍ^２以上の接着力が容易に得られ、床版防水施工時における作業上の規制という課題等を解決でき、防水層とアスファルト舗装層を容易に接着することが可能になる。
【００３０】
つまり、熱硬化性樹脂等を用いた接着剤による接着方法は液状エポキシ樹脂接着剤を用いた接着方法での作業車の汚損等の課題を固形にすることで改善し、アスファルト乳剤を用いた接着方法での乳剤の乾燥養生に要する施工時間の増大という課題を熱硬化性樹脂による短時間施工により改善可能としている。また無溶剤無臭であるため施工時の周辺環境へ配慮ができ多くの利便性を兼ね備えた工法である。
【図面の簡単な説明】
【図１】本発明の舗装道路の床版防水施工法の一例を示す模式断面図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slab waterproofing method for forming a waterproof layer on a slab surface of a road bridge or the like and forming an asphalt pavement layer on the waterproof layer via an adhesive layer.
[0002]
[Prior art]
Road bridges often used on highways and the like are generally completed by asphalt pavement on a floor slab provided by a concrete bridge. However, these road bridges are damaged due to deterioration due to a sudden increase in traffic volume and increase in the size of vehicles in recent years, and there is a problem that the bridges are cracked or peeled off. The main reason is that rainwater containing chlorides, sulfur oxides, carbon dioxide, and the like penetrates the asphalt pavement and reaches the floor slab, so that concrete and reinforcing steel of the floor slab undergo corrosion deterioration.
[0003]
In recent years, as a countermeasure against such corrosion deterioration, a method of preventing the aforementioned corrosion deterioration by forming a waterproof layer of synthetic resin between the floor slab and the asphalt pavement layer and shielding the floor slab from rainwater has been developed in recent years. Various ideas have been devised.
[0004]
However, even in this method, since the asphalt aggregate and the waterproof layer are in point contact with each other, the adhesion between the waterproof layer and the asphalt pavement layer is weak, so that the adhesiveness of the asphalt layer tends to be weak.
[0005]
In order to improve the point contact state, an aggregate (for example, silica sand or the like) is sprayed before the waterproofing layer is hardened or hardened, and the point contact is increased to increase the bonding area, thereby improving the bonding strength. The construction method came to be used.
[0006]
As a method of further developing this method to increase the adhesive strength, a method of applying liquid epoxy resin or asphalt emulsion as an adhesive after hardening of the waterproof layer and asphalt pavement, spraying thermoplastic resin or granular asphalt After that, a method using the heat of the asphalt mixture for asphalt pavement is used.
[0007]
[Problems to be solved by the invention]
However, when the adhesive is a liquid epoxy resin or the like, it is necessary to spray the adhesive immediately before asphalt pavement, so that there remain problems such as regulation of work time and soiling of heavy equipment for pavement. In addition, the method using asphalt emulsion requires a time for drying and curing the emulsion, so that there remains a problem that the working time is restricted.
[0008]
Accordingly, an object of the present invention is to provide a method of waterproofing a slab of a pavement road capable of solving the above-mentioned problems and further improving the adhesion between a waterproof layer and an asphalt pavement layer as compared with the related art.
[0009]
[Means for Solving the Problems]
The present invention provides a floor slab waterproofing method of forming a waterproof layer by applying a synthetic resin or the like to a floor slab surface of concrete or the like, and then forming an asphalt pavement layer on the waterproof layer. A thermosetting resin granule or sheet that is heated, melted, fluidized and hardened is arranged, and then an asphalt pavement layer is formed on the thermosetting resin granule or sheet. This is a method for waterproofing the floor slab of paved roads.
[0010]
Further, the present invention is the method for waterproofing a floor of a pavement road, wherein the granular or sheet-like thermosetting resin is disposed on an uncured surface of the waterproof layer.
[0011]
At room temperature, the thermosetting resin granules or sheet materials used in the present invention are easy to handle because they are solid, and the asphalt pavement layer after forming a waterproof layer by applying a synthetic resin or the like to the floor slab is used. When formed, it is characterized in that it comes into contact with a high-temperature heated asphalt mixture (usually 100 to 170 ° C.), melts and fluidizes within a short time of several minutes, and then reacts and hardens. Therefore, by arranging (spraying and laying) the thermosetting resin granules or sheets on the surface of the waterproof layer, problems such as restrictions on work time and soiling of heavy paving equipment have been solved. . Furthermore, the thermosetting resin granules or sheets melted by the heated asphalt mixture flow into and penetrate into both the waterproof layer and the asphalt pavement layer to fix them together, and due to the stacking thickness or layer thickness thereof. Since the contact area is increased, a sufficient bonding area is obtained, and a larger bonding force than before is obtained.
[0012]
Hereinafter, spraying and laying the thermosetting resin granules or the sheet-like material is mainly abbreviated as “disposing the thermosetting resin granules or the like”.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Further, the construction method of the present invention can be applied to both a case where an asphalt pavement layer is formed on a newly installed slab and a case where a conventional asphalt pavement is replaced.
[0014]
In order to carry out the construction method of the present invention, first, a waterproof layer made of a synthetic resin or the like is formed on a floor slab by a conventional construction method. The forming method is to first repair any damaged or fragile parts on the floor slab surface and clean the surface as necessary. Next, the undercoat is applied to the floor slab surface using a roller, a brush, or the like, and then, preferably, a waterproof layer made of a synthetic resin such as a liquid urethane resin is used. Using a special spray spray type coating machine or the like, apply evenly to form a synthetic resin waterproof layer. The synthetic resin waterproof layer is usually formed with a layer thickness of about 0.5 to 3.0 mm.
[0015]
As the synthetic resin, various liquid resins conventionally used such as a urethane resin and a polyurea resin can be used, and the synthetic resin is not particularly limited as long as it can exhibit waterproof performance.
[0016]
In the construction method of the present invention, the aggregate (for example, silica sand) is sprayed before the waterproof layer made of synthetic resin is completely cured, so that the aggregate particles are not completely buried in the applied waterproof layer. Perform so that it is fixed to the resin. As a result, the surface of the waterproof layer is roughened by the aggregates protruding from the surface of the waterproof layer, so that the thermosetting resin particles formed thereon have an increased adhesion area, and the waterproof layer and the asphalt pavement layer This is preferable in that an interlayer frictional force can be obtained due to physical entanglement between them, and the shear stress between the layers can be countered.
[0017]
As the aggregate, for example, silica sand or the like can be used, and usually about 0.5 to 2.0 kg / m ^{2 is} used. The particle size distribution and the like are not particularly limited, but usually those having an average particle size of about 1.0 to 2.0 mm are used.
[0018]
In addition, in the construction method using the thermosetting resin granules of the present invention, it is possible to spray thermosetting granules instead of aggregates on the surface of the waterproof layer before the waterproof layer is hardened. However, it is preferable to adjust the specific gravity and the shape so as to be fixed to such an extent that they are not completely buried in the waterproof layer.
[0019]
Further, the application method of the present invention arranges thermosetting resin particles or the like on the waterproof layer, but the state of the waterproof layer at the time of arrangement may be in an uncured state or after curing. You may.
[0020]
The resin component such as the thermosetting resin particles used in the present invention is not particularly limited as long as it is a conventional thermosetting resin, and examples thereof include an epoxy / phenol resin curing system and a polyester / isocyanate resin curing system. Can be There is no particular limitation on the pigment, for example, titanium oxide, talc, silica powder, and the like can be used.The additives are also not particularly limited, and a melt viscosity modifier, a leveling agent, a reaction accelerator, and the like can be used. it can. These are melt-mixed at a temperature equal to or lower than the reaction hardening start temperature, and then cooled and solidified. Thereafter, it is further crushed into flakes or granules or formed into a sheet and used. The size of the granular material is not particularly limited, but is preferably about 10 to 50 mm from the viewpoint of spraying workability and blocking resistance. It is recommended to adjust the sheet shape according to the road width.
[0021]
The thermosetting resin particles used in the present invention, when forming the asphalt pavement layer, are melted and fluidized by utilizing the retained heat of the heated asphalt mixture, and penetrate into the waterproof layer and the asphalt pavement layer. Because it is a mechanism that obtains a large adhesion area and further reacts and cures within a short time of several minutes, the heating temperature of the heated asphalt mixture, the melting temperature of the thermosetting resin granules, and the reaction curing start temperature are is important. Generally, a heated asphalt mixture is carried into a pavement site while being kept at a preheating temperature of about 150 to 180 ° C., so that the melting temperature and reaction start temperature of the thermosetting resin granules and the like are preferably set to 150 ° C. or less. . Further, when the melting temperature is 60 ° C or lower, the quality stability may be impaired due to blocking or the like in a high temperature period in summer, so the melting temperature is preferably 100 ° C or higher, and the reaction curing temperature is preferably 150 ° C or lower. It is.
[0022]
In a working example in which the thermosetting resin granules of the present invention are used, the amount of spraying is preferably about 1.0 to 1.5 kg / m ² . If the amount of application is further increased, a further improvement in the adhesive strength can be expected, but since the material cost and the construction time increase, this use amount is appropriate in terms of cost effectiveness.
[0023]
The heated asphalt mixture is a mixture of heated and melted asphalt for asphalt and an aggregate, and the properties thereof are not particularly limited. However, as a condition for paving, the temperature immediately before paving is as high as possible (150 ° C. or higher). Is preferred.
[0024]
The thermosetting resin particles and the like placed on the waterproof layer are first melted and fluidized by contact with asphalt heated to 150 ° C or more during asphalt pavement, so that the waterproof layer surface and the rough surface of each asphalt layer It flows into and penetrates, increasing the bonding area. After that, it is completely cured within a short time of several minutes and functions to fix both layers. The spread hot asphalt mixture is immediately compacted by a heavy paving machine such as an asphalt finisher, and the asphalt paving work is completed.
[0025]
【Example】
Next, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0026]
(Example 1)
As shown in Table 1, a waterproof layer was formed on a concrete base. After spraying an adhesive thereon, an asphalt pavement layer was formed. Epoxy / phenol resin cured resin particles were used as the adhesive. Table 1 shows the results.
[0027]
(Comparative Example 1)
Floor slab waterproofing was performed in the same manner as in Example 1 except that a liquid epoxy resin was applied as an adhesive. Table 1 shows the results.
[0028]
[Table 1]

[0029]
【The invention's effect】
According to the floor slab waterproofing method of the present invention, the required adhesive strength between the waterproof layer and the asphalt layer on the floor slab, that is, 20 according to the standards of each National Road Authority, can be achieved by a simple construction operation such as arranging thermosetting resin particles. Adhesive strength of 0.6 N / mm ² or more at ℃ can be easily obtained, so that problems such as work regulations during floor slab waterproofing can be solved, and the waterproof layer and the asphalt pavement layer can be easily bonded. Will be possible.
[0030]
In other words, the bonding method using an adhesive using a thermosetting resin or the like improves the problem such as soiling of a working vehicle by the bonding method using a liquid epoxy resin adhesive by solidifying the bonding method, and the bonding using an asphalt emulsion. The problem of increasing the working time required for drying and curing the emulsion by the method can be improved by short working time with a thermosetting resin. In addition, since it is solvent-free and odorless, it is a method of construction that takes into consideration the surrounding environment during construction and has many conveniences.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing an example of a method for waterproofing a slab of a paved road according to the present invention.

Claims (2)

After applying a synthetic resin or the like to the floor slab of concrete or the like to form a waterproof layer, in the floor slab waterproofing construction method of forming an asphalt pavement layer on the waterproof layer,
On the surface of the waterproof layer, a thermosetting resin granule or sheet that is heated, melted, fluidized, and hardened is arranged, and then the asphalt pavement is formed on the thermosetting resin granule or sheet. A method for waterproofing a slab of a paved road, comprising forming a layer. The floor slab waterproofing method for a pavement road according to claim 1, wherein the granules or sheets of the thermosetting resin are arranged on an uncured surface of the waterproof layer.

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