JPH089851B2 - Floor slab waterproofing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor slab waterproofing method for preventing deterioration of concrete and corrosion of internal reinforcing bars by blocking permeation of rainwater and a snow-melting agent into a concrete slab of a bridge or the like.

[0002]

2. Description of the Related Art As typical floor slab waterproofing methods to date, there are a sheet pasting type waterproofing method, a rubber-based material coating type waterproofing method, and a synthetic resin material coating type waterproofing method.

The sheet-adhesive waterproof method is a method in which a primer is applied on the upper surface of a concrete floor slab and then a sheet of rubber asphalt is pasted, and an asphalt mixture is laid on the sheet. Is a method of paving a heated asphalt mixture after coating a rubber-based material on the top surface of a concrete floor slab.The synthetic resin-based material waterproofing method is a method of coating a synthetic resin-based material on a concrete floor slab It is a method of paving a hot asphalt mixture before curing the material.

[0004]

However, these methods have some problems. In the sheet sticking type waterproof construction method, as shown in FIG. 4, when the sheet is stuck, air 5 enters between the floor slab 1 and the sheet forming the waterproof film 2, causing peeling of the pavement, Due to the weak adhesion between the sheet and the asphalt mixture, peeling of the pavement occurs in the case of thin layer pavement of about 30 mm or less.

In the rubber-based material coating type waterproofing method, the rubber-based material forming the waterproof film 2 has a strong adhesive force even after curing, so that when the vehicle for carrying in the mixture enters the rubber-based material, as shown in FIG. The coating film of the material adheres to the tire 6 and peels off between the floor slab and the coating film, or air enters to peel off the pavement.

In the synthetic resin-based material coating type waterproofing method, since the vehicle for carrying in the heated asphalt mixture enters before the synthetic resin-based material forming the waterproof film 2 is cured, as shown in FIG. The material adheres to the tire 6 (indicated by the dotted line) and becomes insufficient, and the applied amount becomes insufficient, or the heat of the paved asphalt mixture causes the viscosity of the applied synthetic resin-based material to extremely decrease, resulting in a heated asphalt mixture. There is a part that is absorbed by the water and does not form the waterproof film 2,
In addition, when paving and rolling the heated asphalt mixture, a deviation occurs on the coated synthetic resin surface, sometimes about 50
When the pavement thickness is about millimeter or less, the pavement surface is corrugated and the desired finished surface cannot be secured.

An object of the present invention is to solve the above-mentioned problems and to provide a more effective floor slab waterproofing method.

[0008]

The present invention provides a floor slab waterproofing method by the following means in order to solve the above-mentioned problems. That is, a room temperature curing type synthetic resin is applied to the upper surface of a concrete floor slab, pellets of a heat melting type resin are sprayed on the synthetic resin before the synthetic resin is cured, and the synthetic resin is cured to form a waterproof film. After that, the floor slab waterproofing method is used in which a heated mixture for forming a pavement layer is laid on the slab.

[0009]

[Function] The room temperature-curable synthetic resin applied to the floor slab concrete hardens to form a waterproof film and becomes integral with the floor slab concrete, and after the synthetic resin hardens, a heating mixture for forming a pavement layer is paved. Therefore, since the pellets sprayed before the curing of the synthetic resin are of the heat melting type, they are melted by the heat of the heated mixture to integrate the waterproof film and the pavement layer.

[0010]

Embodiments of the present invention will be described with reference to FIGS. First, as shown in FIG. 1, a room temperature curable synthetic resin for forming a waterproof film 2 was applied to the upper surface of a concrete floor slab 1. Then, pellets 3 of the hot-melt resin were sprayed on the synthetic resin before it was cured. After the synthetic resin forming the waterproof film 2 was cured, a hot asphalt mixture forming the pavement layer 4 was laid on the synthetic resin.

In this embodiment, the room temperature-curable synthetic resin used to form the waterproof film 2 is methyl methacrylate, and the coating amount is about 1 kilogram per square meter. The pellets are a thermoplastic resin containing polyoctanylene resin as a main component, and have a melting initial temperature of 60 ° C., a diameter and a length of 3 to 5 millimeters, and a spraying amount of 100 to 300 grams per square meter.

At this time, the outside air temperature was 9 ° C and the floor slab surface temperature was 9 ° C. The applied methyl methacrylate was cured in about 10 minutes. Thereafter, the asphalt mixture heated to 154 ° C was paved. Immediately after paving, the temperature of the floor slab surface (the surface of the film coated with methyl methacrylate) reached 90 ° C due to the residual heat of the heated asphalt mixture, and increased to 120 ° C after about 3 minutes.

After the paving was completed, the following day, a notch was made with a core cutter and a tensile test was conducted. As a result, all of the asphalt mixture parts forming the pavement layer were broken, and the floor slab surface and the waterproof film, and the waterproof film and the pavement layer were respectively Has sufficient adhesive strength,
Further, when the cores of the respective layers were integrally collected and the thickness of the waterproof film was measured, the film was sufficiently formed as planned, and the expected result was obtained.

Of course, the present invention is not limited to the examples. For example, the room temperature curing type synthetic resin for forming the waterproof film may be polyester, epoxy or the like, and the heat melting type resin may be ethylene. -Ethyl acrylate copolymer, ethylene / vinyl acetate copolymer, etc. are available.

[0015]

Since the present invention is constructed as described above,
It has the following effects. The room-temperature-curable synthetic resin applied to the slab concrete hardens to form a waterproof film and becomes integral with the slab concrete, and the pellets sprayed on the synthetic resin before curing the synthetic resin are heat-meltable resins. Therefore, it is melted by the heat of the heated mixture paved, and the waterproof film and the pavement layer are integrated.

Since the room temperature curing type synthetic resin is applied, air does not enter between the concrete floor slab and the waterproof film, and the waterproof film is not peeled off. Since the heated mixture is paved after curing using a room temperature curable synthetic resin, it is possible to prevent the synthetic resin from adhering to the tire even when a vehicle carrying the mixture enters, and it can also be used for construction immediately opened. .

Since the pellets of the hot-melt resin are sprayed on the synthetic resin before the room-temperature curing synthetic resin is cured, the pellets are firmly fixed to the synthetic resin as the synthetic resin is cured. Therefore, even if a vehicle or the like carrying in the heated mixture enters, it will not be attached to the tires or the like and taken. Further, since the pellets of the heat-melting resin have a high viscosity even when melted, a constant pavement level can be secured without causing misalignment or waviness even during the rolling operation of the paved heated mixture.

[Brief description of drawings]

FIG. 1 is a schematic view illustrating a state in which a room temperature-curable synthetic resin is applied to the upper surface of floor slab concrete to form a waterproof film.

FIG. 2 is a schematic diagram illustrating a state in which hot-melt resin pellets are sprayed before the room-temperature-curable synthetic resin is cured.

FIG. 3 is a schematic diagram illustrating a state in which the heated mixture is paved after the room temperature curable synthetic resin is cured.

FIG. 4 is a schematic diagram illustrating a conventional example of a sheet-paste type waterproof method.

FIG. 5 is a schematic view illustrating a conventional example of a rubber material-coated waterproofing method.

FIG. 6 is a schematic diagram illustrating a conventional example of a waterproofing method of applying a synthetic resin material.

[Explanation of symbols]

 1 ... Concrete floor slab 2 ... Waterproof membrane 3 ... Pellets of heat melting type 4 ... Heating mixture

Claims (1)

[Claims] 1. A concrete floor slab is coated with a room temperature curing type synthetic resin for forming a waterproof film, and a pellet of a heat melting type resin is sprayed onto the synthetic resin before the synthetic resin is cured. A floor slab waterproofing method, characterized in that, after curing, a heated mixture for forming a pavement layer is paved on the floor.