JP2002307593A - Waterproof laminate and waterproof method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof laminate for the corners or drainageway parts of a bridge floor panel capable of preventing the corrosion or crack of a reinforcing rod, generating no leakage of water with high adhesiveness or strength, being executed at the normal temperature, being applied to concrete even if the surface of concrete is in a wet state, and being enhanced in weatherability or execution properties. SOLUTION: The waterproof laminate is constituted by laminating a spraying waterproof material, a sheetlike waterproof material and, if necessary, a weatherable coating material. As the spraying waterproof material, a normal temperature vulcanizable rubber emulsion is preferable and, as the sheetlike waterproof material, a rubber asphalt type sheet is preferable. After the spraying waterproof material 1 and the sheetlike waterproof materials 2 and 2' are applied to the corners 3, floor panel 4 and drainageway parts of a bridge, if necessary, the weatherable coating material is executed to perform waterproof construction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof laminate and a waterproofing method for a bridge, particularly for a corner portion or a drainage portion of a bridge slab.

[0002]

2. Description of the Related Art In addition to narrow bridges crossing rivers and straits, bridges such as roads and railways include viaducts constructed in urban areas and the like.

As a waterproofing method for bridge decks made of reinforced concrete or the like, for example, concrete viaduct road decks, a waterproof sheet as a sheet waterproofing material is often used.

[0004]

However, in the case where a waterproof sheet is used, construction is performed at a corner portion of a bridge (a shoulder portion or a boundary portion of a bridge road) or a drain hole portion of a bridge (a portion provided with a drain hole). There was a problem that it was difficult to do.

[0005] Therefore, when a waterproof sheet is used for a corner portion or a drain hole, the waterproof sheet is often cut and laminated. Therefore, there is a problem that labor is required and construction is difficult, so that the cost is increased, a construction defect such as generation of a gap occurs, and there is a great possibility that corrosion of a reinforcing bar or expansion of a crack due to water leakage from the gap occurs.

Further, in an area where snow melting material is used, the snow melting material is splashed by a vehicle on a vertical portion such as a corner portion or a drainage hole, so that water containing snow melting material having corrosiveness of reinforcing steel is supplied to the corner portion. When water leaks from the drain hole, there is a problem that the possibility of corrosion of reinforcing steel is greater.

As a result of diligent studies of these problems, the present inventor has found that by installing a sprayed waterproofing material and a waterproofing sheet in a corner or a drainage groove, water leakage does not occur, workability is improved, and cost is reduced. The present inventors have found that the present invention is also excellent, and have reached the present invention.

[0008]

That is, the present invention relates to a waterproof laminated body obtained by laminating a spray waterproofing material and a sheet waterproofing material, and further comprising a weatherproof coating material laminated on the surface of the spraying waterproofing material. The waterproof laminate is a waterproof laminate in which the spray waterproof material is a room temperature vulcanizable rubber emulsion, and the sheet waterproof material is a rubber asphalt-based sheet. The waterproof construction method is characterized in that the waterproof laminate is constructed at a corner or a drain of a bridge.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below.

The present invention relates to a waterproof laminate and a waterproofing method for a corner portion or a drain hole of a bridge slab.

The spray waterproofing material of the present invention includes a room temperature vulcanization type rubber emulsion type waterproofing material, a urethane type waterproofing material, and a solvent type rubber type waterproofing material. Of these, a room temperature vulcanizable rubber emulsion-based waterproofing material is preferable in terms of cost, workability, and adhesiveness when the concrete surface is in a wet state.

If a two-component spraying type is used as the cold-curable rubber emulsion-based waterproofing material and a spraying type is used as the weather-resistant coating material, the construction speed can be greatly improved.

When the waterproof laminate of the present invention is used, it can be applied to a wet surface even when the surface of the concrete laminate is wet due to rain, fraying with a water jet, or after washing.

Although there are various types of rubber emulsion waterproofing materials of the present invention, room temperature vulcanization type rubber emulsion waterproofing materials are preferred in terms of cost, workability, and adhesion when the concrete surface is in a wet state. preferable.

As a room temperature vulcanized rubber emulsion-based waterproofing material, an oil-extended oil (hereinafter referred to as "A agent") and a vulcanizing agent dispersed therein are preferable because of their high adhesion and good workability. A room temperature two-agent vulcanization type rubber emulsion-based waterproofing material (hereinafter referred to as a room temperature vulcanization type waterproofing material) composed of a B agent) is preferred. Room temperature vulcanization type waterproofing material, A agent and B
It is preferable to store the agents separately, and to mix the A agent and the B agent during construction. Among the room-temperature vulcanization-type waterproofing materials, those comprising a A agent containing a styrene-butadiene rubber emulsion as a rubber emulsion and a B agent containing an oil extended oil, a vulcanizing agent, and calcium oxide are preferable. Such room temperature two-agent vulcanization type rubber emulsions include those manufactured by Grace Co., Ltd. under the trade name "Procor 75" and the like.
r series and the like.

The room temperature vulcanizing type waterproofing material is preferably a spraying type in which the agent A and the agent B are sprayed while being mixed at the tip of the nozzle, since the pot life can be secured.

As the rubber emulsion used for the agent A, synthetic rubbers such as styrene butadiene rubber, chloroprene rubber, and isoprene rubber, and natural rubbers are used. Further, these rubbers may be mixed and used. Of these, styrene butadiene rubber is preferred in terms of vulcanization properties and economy, and chloroprene rubber is preferred in terms of improving flame retardancy.

The rubber solid content of the rubber emulsion is preferably from 5 to 50 parts by mass based on 100 parts by mass of the total solid content after mixing the agent A and the agent B from the viewpoint that good film performance is obtained.
0 to 25 parts by mass is more preferred.

In the agent A, a strong alkali such as KOH or NaOH is usually used as a pH adjuster at 1.5 parts by mass, and at most 2. It is preferable to use 5 parts by mass.

The oil-extended oil used for the agent B is more preferably a mixture of an aroma oil and a paraffin oil, since the viscosity can be easily adjusted and the physical properties of the rubber after vulcanization can be easily adjusted. Paraffin oil is used in 50 parts by weight of oil extended oil to adjust the viscosity when mixed with the agent A.
It is used at a ratio of not more than parts by mass.

The amount of the oil-extended oil of the agent B is preferably 20 to 60% in the mixture of the agent A and the agent B.

Further, chlorinated paraffin can be used for improving flame retardancy. Further, asphalt and the like can be used as the B agent, but the amount of use is desirably 30 parts by mass or less based on 100 parts by mass of the rubber solid content.

As the vulcanizing agent dispersed in the extended oil used in the agent B, a sulfur-based vulcanizing agent is preferable, and sulfur is more preferable. The amount of the vulcanizing agent used is preferably 0.5 to 15 parts by mass based on 100 parts by mass of the rubber solids.

Further, a vulcanization accelerator is used in combination with the agent B. Examples of the vulcanization accelerator include zinc isopropyl xanthate, zinc dibutyldithiocarbamate dibutylamine complex, and zinc oxide.

The amount of the vulcanization accelerator to be used is preferably 0.1 to 5.0 parts by mass with respect to 100 parts by mass of the rubber solid content when zinc isopropyl xanthate is used, and the zinc dibutyldithiocarbamate dibutylamine complex is used. When used, 0.1 to 5.0 parts by mass is preferable with respect to 100 parts by mass of rubber solids, and when zinc oxide is used, 0.5 to 20.0 parts by mass with respect to 100 parts by mass of rubber solids. Is preferred.

Further, as the agent B, additives such as fumed silica, polymer fiber and pulverized rubber may be used in an amount of 0.5 to 25 parts by mass based on 100 parts by mass of the total solid content.

Further, as the agent B, a hygroscopic agent such as calcium oxide, portland cement and calcium sulfate cement can be used. The moisture absorbent dehydrates the water in the agent A when mixed with the agent A, so that a drying step is not required and the adhesion of the structure is improved. Among the hygroscopic agents, calcium oxide is preferred.

The amount of the hygroscopic agent used is preferably 10 to 50% in the mixture of the agent A and the agent B.

The sheet-based waterproofing material of the present invention is preferably a rubber asphalt-based waterproofing sheet because of its excellent self-adhesiveness, that is, excellent adhesiveness to a floor slab or the like. A rubber asphalt-based waterproof sheet laminated with a heat-resistant polypropylene mesh is more preferable because it can be directly applied to a waterproofing sheet. Rubber asphalt waterproof sheet laminated with heat-resistant polypropylene mesh,
The self-adhesiveness is good, and the superposed portion of the waterproof sheets adheres only by pressing without using an adhesive or a primer, so that the construction can be performed very efficiently. Furthermore, it can adhere to floor slabs without using heated asphalt,
In addition, there is no need for heat treatment or the like of the waterproof sheet, which has the effect that the waterproof sheet can be installed at normal temperature.

In the corner portion, a portion of the pavement surface above the pavement surface is required to have weather resistance. Therefore, in the present invention, it is preferable to coat the sprayed waterproof material surface with a weather resistance coating material.

The weather-resistant coating material of the present invention has weather resistance. As the weather-resistant coating material, an acrylic or urethane-based material is preferred, and an acrylic-based material is more preferred, in that it has good weather resistance and good adhesion to a layer made of a rubber emulsion-based waterproofing material.

The acrylic weather-resistant coating material contains an acrylate resin. As the acrylate resin, various (meth) acrylate copolymers such as methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate can be used.

The acrylic weather-resistant coating material may be a material using a solvent-based resin or a material using an emulsion-based resin, but an emulsion-based material is preferable from an environmental point of view.

As the acrylic weather-resistant coating material, UV absorbers, antioxidants, pigments, extenders, and the like used for plastics and rubbers can be used, if necessary.

An ordinary urethane-based weather-resistant coating material can be used in the same manner as the acrylic weather-resistant coating material. Examples of the urethane-based weather-resistant coating material include a weather-resistant urethane-based weather-resistant coating material containing a urethane resin having an aliphatic skeleton.

Further, in the weather-resistant coating material of the present invention, an ethylene / vinyl acetate copolymer or the like may be used in combination as a modifier.

The weather-resistant coating material is usually 200 to 400 g / m
² is applied. In terms of the construction speed and the like, the spray coating type of the weather resistant coating material is preferable.

As the weather-resistant coating material, a spraying type spraying from the tip of the nozzle is preferable from the viewpoint of good workability.

When spraying a waterproofing material on a vertical portion such as a corner portion, for example, a railing portion, there is no particular limitation on a waterproofing range. However, in order to prevent water leakage from the inside of the pavement, the waterproofing portion extends to a level above the pavement surface. It is preferable to perform waterproofing, and it is more preferable to perform waterproofing at least to a height of 15 cm or more from the pavement surface.

Further, the weather-resistant coating material may be colored with a coloring agent.

As a waterproofing method for the corner portion, for example,
The method of FIGS.

FIG. 1 shows a method of using a sheet waterproofing material 2 after spraying waterproofing material 1 is applied. In FIG. 1, the waterproof layer 1 is formed by spraying the spray waterproof material 1 on the corner 3 of the bridge and a part of the floor slab 4. The spray waterproofing material 1 is sprayed to the upper part of the surface of the pavement 5 at the corner portion 3, and is sprayed to the end of the floor slab 4 excluding the center portion. Then, the sheet waterproofing material 2 is arranged on the floor slab 4. Note that the sheet waterproofing material 2 is disposed on the surface of the spraying waterproofing material 1 sprayed on the end of the floor slab 4. Thereafter, paving 5 is performed on the surface of the sheet-based waterproof material 2.

FIG. 2 shows a method of applying the spray waterproofing material 1 after using the sheet waterproofing material 2. In FIG. 2, the sheet waterproofing material 2 is arranged on the entire surface of the floor slab 4. Then, a spray waterproof material 1 is sprayed on the corner 3 of the bridge to form a waterproof layer. In addition, the spray waterproofing material 1 is sprayed on the end of the sheet waterproofing material 2 in the floor slab 4. In the corner portion 3, the spray waterproofing material 1 is sprayed to above the surface of the pavement 5. Thereafter, paving 5 is performed on the surface of the sheet-based waterproof material 2.
In the case of the floor slab 4, the pavement 5 is also applied to the surface of the spray waterproof material 1 sprayed on the end of the sheet waterproof material 2.

FIG. 3 also shows a method of applying the spray waterproofing material 1 after using the sheet waterproofing material 2. In FIG. 3, the sheet-based waterproofing material 2 is arranged on the entire surface of the corner portion 3 and the floor slab 4. The sheet-based waterproofing material 2 is disposed in the corner portion 3 to below the surface of the pavement 5. The spray waterproof material 1 is sprayed on the surface of the sheet waterproof material 2 disposed at the corner 3 and the lower part of the corner 3. The spray waterproofing material 1 is sprayed on the surface of the pavement 5 at the corner 3. Thereafter, paving 5 is performed on the surface of the sheet-based waterproof material 2.

FIG. 4 shows a method of superposing two sheets of sheet-based waterproofing materials 2 and 2 '. It is preferable to overlap the sheet-based waterproofing material 2 because the waterproofing effect becomes more complete. In FIG. 4, the sheet waterproofing material 2 is arranged on the entire surface of the floor slab 4. Then, a spray waterproof material 1 is sprayed on the corner 3 of the bridge to form a waterproof layer. In addition, the spray waterproofing material 1 is sprayed on the end of the sheet waterproofing material 2 in the floor slab 4. Further, a sheet-based waterproofing material 2 'is arranged so as to cover the surface of the spraying waterproofing material 1 sprayed to the end of the floor slab 4. Then, paving 5 is performed on the surface of the sheet-based waterproofing materials 2 and 2 ′.

[0046]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

Example 1 Waterproofing was performed according to FIG. Concrete viaduct (however,
The asphalt-based solvent-type primer is applied to the floor slab 4 in a wet state (the concrete surface is in a wet state), and after drying, the sheet-based waterproofing material 2 (a rubber asphalt-based waterproofing sheet laminated with a heat-resistant polypropylene mesh, a commercial product) is applied to the corner portion 3.
(Trail section). Spraying waterproofing material 1 made of room temperature vulcanizing type waterproofing material on the surface of sheet-like waterproofing material 2 (produced by Grace, trade names "Procor 75", "Procor"
75 "is spray type, styrene butadiene rubber is used as rubber emulsion in agent A, oil extended oil in agent B,
(Using a vulcanizing agent and a hygroscopic agent) to a thickness of 1.5 mm. The spray waterproofing material 1 was applied to the corner portion 3 from the floor slab 4 to a height of 30 cm, and the floor slab 4 was sprayed to the edge from the corner portion 3 to a horizontal surface of 15 cm. Six hours after spraying the spraying waterproofing material 1, the entire surface of the corner portion 3 including the spraying waterproofing material 1 is sprayed with an acrylic emulsion weatherproof coating material (commercially available, not shown) at about 300 g / m ² and applied. did. After the weather-resistant coating material has hardened, a sheet-based waterproofing material 2 '(a rubber asphalt-based waterproofing sheet laminated with a heat-resistant polypropylene mesh, a commercial product) is sprayed onto the four end portions of the floor slab with a width of 30 cm. The sprayed waterproofing material 1 was overlaid and attached so as to cover the surface. Thereafter, asphalt pavement 5 was formed on the surface of sheet-based waterproofing material 2, 2 'to a thickness of 5 cm. The drainage holes (not shown) of the concrete viaduct were sprayed with the sprayed waterproofing material 1 and then cut and pasted on the sheet-based waterproofing material 2. The adhesive peeling strength (180 degrees) between the sprayed waterproofing material 1 and the concrete surface (corner portion 3) is 1 N / mm, and the adhesive peeling strength between the sheet-based waterproofing material 2 and the concrete surface (floor 4) is 1.5 N / mm. mm. In addition, a sample was taken from the part coated with the weather-resistant coating material and subjected to an accelerated test using a sunshine weatherometer at a black panel temperature of 63 ° C. under rainy conditions. As a result, no cracks were generated even after 2,000 hours. Met. Also, the workability was good, and two workers could perform a waterproofing work combining a spray waterproofing material and a sheet-based waterproofing material at a working speed of 200 m ² / hr (about 440 m).

(Measurement method) Adhesive peel strength: according to ASTM D 412-92. Accelerated test: Use a sunshine weatherometer. In addition, water was applied to the sample in a shower to make it rainy.

Example 2 The same operation as in Example 1 was performed except that the weather-resistant coating material was not used. The adhesive peel strength between the sprayed waterproofing material 1 and the concrete surface and the adhesive peel strength between the sheet-based waterproofing material 2 and the concrete surface were as good as in Example 1. However, as a result of performing an accelerated test using a sunshine weatherometer under the conditions of a black panel temperature of 63 ° C. and rainy weather, 2
After 000 hours, the discoloration was large, cracks occurred, and the waterproofness was reduced.

Comparative Example 1 A sheet-based waterproofing material (a rubber asphalt-based waterproofing sheet laminated with a heat-resistant polypropylene mesh, a commercially available product) was placed on a concrete slab bridge. After that, in the corner part, in the range from the floor slab to 5 cm in height, and in the floor slab, in the end from the corner part to the horizontal surface 15 cm,
A sheet-type waterproof material was stuck. Seat waterproof material is width 20
When sticking a sheet-based waterproofing material, a primer was previously applied to the corner surface of the concrete surface using a material cut to a length of 20 cm and a length of 20 cm. Since it took time to cut and paste the sheet-based waterproof material, the workability of the corner was poor,
The execution speed was 50 m / hr for three workers.

[0051]

According to the present invention, the waterproofing work is performed by combining the spraying waterproofing material and the waterproofing sheet on the corner portion or the drainage portion of the bridge, so that the reinforcing bar is not corroded or cracked.
It does not generate water leakage, has high adhesiveness and strength, can be applied at room temperature, can be applied even when the concrete surface is wet, and has an excellent effect of improving weather resistance and workability.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a waterproofing method of the present invention.

FIG. 2 is a schematic view showing another waterproofing method of the present invention.

FIG. 3 is a schematic view showing another waterproofing method of the present invention.

FIG. 4 is a schematic view showing another waterproofing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spray waterproof material 2, 2 'sheet-type waterproof material 3 Corner part 4 Floor slab 5 Pavement

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 2D059 AA14 AA21 BB39 GG02 GG37 4F100 AL05B AM00B AN00A AN00B AR00A AR00B BA02 BA03 BA07 BA10A BA10B BA10C CC00C EH61A EJ06A GB90 JD05A JD05B JK01 JL01JL01L

Claims (5)

[Claims] 1. A waterproof laminate obtained by laminating a spray waterproof material and a sheet waterproof material. 2. The waterproof laminate according to claim 1, further comprising a weather-resistant coating material laminated on the surface of the sprayed waterproof material. 3. The waterproof laminate according to claim 1, wherein the sprayed waterproof material is a room temperature vulcanizable rubber emulsion. 4. The waterproof laminate according to claim 1, wherein the sheet-based waterproof material is a rubber asphalt-based sheet. 5. A waterproofing method comprising applying the waterproof laminate according to claim 1 to a corner or a drain of a bridge.