JPH04366225A - Water-proof stratum of ground surface and its creating method - Google Patents

Abstract

PURPOSE:To form the water-proof stratum of the oblique surface of a steep slope by coating a ground surface necessary for water-proof processing, with primer, and by coating the ground surface, with elastomer consisting of main agent with the main component of polyol and hardening agent with the main component of isocyanide. CONSTITUTION:A ground surface necessary for water-proof processing is coated with the primer of adhesives, by means of a spray gun 4. After that, the upper layer of a primer layer is directly coated with elastomer 3 consisting of main agent with the main component of polyol and hardening agent with the main component of isocyanide. Then, the main agent and hardening agent mixed with each other for coating with are hardened at a room temperature and in a short time, and a coating film is formed, and a water-proof stratum 2 is created. As a result, even on an oblique surface with the gradient for forming the water-proof stratum 2, exceeding a repose angle, the water-proof stratum 2 to be formed can be formed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the improvement of waterproof layers on the skin of various reservoirs, etc., and to the improvement of methods for making the same.

0002

[Prior Art] When forming depressions into various reservoirs, waste landfills, wastewater ponds, artificial ponds, etc., waterproofing of the surface is necessary to prevent liquid from seeping into the ground. is necessary. To deal with this, conventionally a rubber sheet was laid on the ground to form a waterproof layer. This was constructed using the following steps (see Figure 4). (1) Base formation on a slope The reservoir etc. 1 is composed of a bottom surface 10 and a slope 11 of an embankment connected to the bottom surface 10. Forming the base on the slope 11 is a process of adjusting the slope of the slope 11 by applying embankment or the like to the slope 11.

[0003] The slope 11 has a slope of various sizes, and the slope angle of the slope 11 is larger than the angle of repose (the angle that the slope 11 makes with the horizontal plane when the earth and sand does not naturally collapse and stands still). In this case, the workability when laying the rubber sheet 6, which will be described later, will be significantly deteriorated. This is because the soil, sand, gravel, etc. that form the surface of the ground are intermittently broken down.

[0004] Therefore, when the slope 11 has a slope greater than the angle of repose, the slope 11 requires base molding. As a result, the gradient of the slope 11 is made equal to or less than the angle of repose depending on the soil quality of the ground surface (the angle of repose varies depending on the soil quality of the reservoir 1 to be formed, such as soil, sand, gravel, etc.). (2) Surface treatment Surface treatment is a process in which stone blocks, stumps, etc. protruding from the surface are removed as necessary to ensure a certain level of smoothness of the surface. This is to prevent the rubber sheet 6 from being scratched. (3) Laying the rubber sheet on the skin This is a step of laying the rubber sheet 6 on the skin and subjecting the overlapped ends 60 of the rubber sheet 6 to waterproof adhesive treatment. Through the above steps, the waterproof layer 2 of the rubber sheet 6 is formed on the background. According to this construction method, it is true that reservoirs etc.
Waterproofing can be applied to the skin.

[0005] However, depending on the form of the reservoir, the above-mentioned waterproofing treatment may not be possible. These include steep slopes that far exceed the angle of repose, which makes it difficult to form a base, and steep slopes that have been cut down and where it is impossible to form a base. Furthermore, since base molding is a very time-consuming process, there is a desire to omit it if possible.

[0006]

[Problem to be solved by the invention] Therefore, in this invention,
We have created a waterproof layer on the surface of the ground that can be formed on steep slopes that far exceed the angle of repose, or on steep slopes that have been cut down, where conventional rubber sheet waterproof layers cannot be formed. Take it as a challenge. Additionally, this invention can be applied to steep slopes that far exceed the angle of repose and steep slopes that have been cut down, for which conventional rubber sheet waterproof layers could not be formed.
The purpose of this project is to propose a method for creating a waterproof layer on the surface that can be constructed without base molding.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention takes the following technical measures. The means of the invention according to claim 1: After applying an adhesive primer to the skin that requires waterproofing, an elastomer 3 consisting of a main ingredient mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. Coated and cured. The means of the invention according to claim 1: After applying an adhesive primer to the skin that requires waterproofing, an elastomer 3 consisting of a main ingredient mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. Apply and cure.

[0008] Furthermore, the adhesive primer may be applied directly to the background, or a fixing layer 5 may be provided between the background and the adhesive primer.

[0009]

[Operations] As a result of the above structure, the present invention has the following functions. Effect of the invention according to claim 1: After applying an adhesive primer to the skin that requires waterproofing treatment, an elastomer 3 consisting of a main agent mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. do.

By the way, even if the slope exceeds the angle of repose and there is a tendency for dirt or the like to collapse on the surface, when the elastomer 3 is applied to the surface, it hardens into a film and forms a waterproof layer. This is because the elastomer 3 has the property of curing at room temperature. Therefore, the waterproof layer of the skin of the present invention can be formed even on slopes where the slope on which the waterproof layer is to be formed has a slope so large that it far exceeds the angle of repose. Effect of the invention according to claim 2 After applying an adhesive primer to the skin that requires waterproofing treatment, an elastomer 3 consisting of a main agent mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. do.

By the way, even if the slope with the above-mentioned surface exceeds the angle of repose and there is a tendency for soil, etc. to collapse on the surface,
When the elastomer 3 is applied to the skin, it hardens to form a film that is a waterproof layer. This is because the elastomer 3 has the property of curing at room temperature. Therefore, according to the method of the present invention, there is no need to perform base molding even if the slope on which the waterproof layer is to be formed has a slope so large that it far exceeds the angle of repose.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below with reference to the drawings showing the state of implementation of the present invention. Depending on the condition of the surface of the depression in which the reservoir 1 is to be formed, it may or may not be necessary to provide the fixed layer 5, which will be described later, and each embodiment will be described separately. The first embodiment is a basic case in which it is not necessary to provide the fixed layer 5 on the skin, and the second to fourth embodiments are cases in which it is necessary to provide the fixed layer 5 depending on the condition of the skin. First Embodiment This embodiment is a case where the surface on which the waterproof layer 2 is to be formed is relatively smooth, and there is no need to provide the fixing layer 5 described in the second and subsequent embodiments (see FIG. 1).

The depression in which the reservoir 1 is to be formed consists of a bottom surface 10 and a slope 11, both of which are relatively smooth in this embodiment. If there is rock-like earth and sand (not shown), they are removed by air blowing in advance to perform the surface treatment as described in the prior art section above. Even if the gradient of the slope 11 on which the waterproof layer 2 is to be formed exceeds the angle of repose, the waterproof layer 2 can be formed for the reasons described in the section of the above-mentioned operation. That is, the waterproof layer 2 on the surface of the ground can be applied to steep slopes 11 that far exceed the angle of repose, which could not be formed using the waterproof layer 2 of the conventional rubber sheet 6, or to steep slopes 11 that have been cut down. Can be formed. It goes without saying that the waterproof layer 2 can be formed when the slope 11 has a slope equal to or less than the angle of repose. Furthermore, from the viewpoint of the construction method, it has the advantage of not requiring base molding.

Next, a method for forming the waterproof layer 2 on the skin will be explained step by step. First, an adhesive primer (not shown) is applied to the skin that requires waterproofing. This primer can be made of a known material, and it is easier to use the spray gun 4 when spraying it onto the scalp. Thereafter, an elastomer 3 consisting of a main component mainly composed of polyol and a curing agent mainly composed of isocyanate is directly applied to the upper layer of the primer layer. This is also a well-known spray gun 4 similar to the above.
Workability is good when using . This spray gun 4 is
It is preferable to use a type in which the base resin and the curing agent join together immediately before spouting, and the liquid elastomer 3 containing the base resin and the curing agent is jetted from the nozzle 40.

[0015] When the above-mentioned main agent and curing agent are mixed and applied, they are cured within a short time (for example, several seconds) at room temperature to form a coating film. In this way, the waterproof layer 2 of the background is formed. As mentioned above, applying the elastomer 3 using the spray gun 4 has excellent workability even when applying to vertical surfaces, etc., and by increasing the discharge amount of the spray gun 4, a thick waterproof layer can be formed. 2 is also easy to form. Further, when applied with the spray gun 4, the waterproof layer 2 can be formed with the same unevenness on the coated surface, so there is less risk of the waterproof layer 2 being damaged by external stress. Furthermore, spray gun 4
Depending on the construction, a seamless seal without any joints is possible, and even when construction is performed over a very large area, it is possible to form a seamless waterproof layer 2.

[0016] As the elastomer 3 consisting of the above-mentioned main agent and curing agent, for example, the following two elastomers having ultra-fast curing properties can be used.
I can list the types. No. 1 [Main ingredient]
: [Curing agent] Main component Polyether polyol : Main component Isocyanate prepolymer Appearance Yellow opaque liquid :
Appearance Light yellow transparent liquid Moisture content 0
．． 1% or less: Viscosity (20°C)
5,000cpsPH 10
:Density (20℃) 1.
09g/cm3 Viscosity (20℃) 3,000cps
: Flash point 150℃ or higher Density (
20℃) 1.05g/cm3: Pour point
-19°C Flash point: 165°C Ignition point: 470°C [Blending ratio] Weight ratio: Base resin: Curing agent = 100:77 Volume ratio: Base resin: Curing agent = 100:74 Manufactured by Nitta Co., Ltd., product name: Nittec No. 2 [Main ingredient]
: [Curing agent] Main component Polyether polyol : Main component Isocyanate prepolymer Appearance Yellow opaque liquid :
Appearance Light yellow transparent liquid Moisture content 0
．． 1% or less: Viscosity (20°C)
12,000cpsPH 10
: Density (20℃) 1
．． 07g/cm3 Viscosity (20℃) 3,000cp
s: Flash point 200℃ or higher Density (20℃) 1.05g/cm3: Pour point -5℃ Flash point 165℃ Ignition point 470℃ [Blending ratio] Weight ratio...Main agent: Curing agent = 100:150 Volume ratio...Main agent :Curing agent=100:147 Manufactured by Nitta Co., Ltd., trade name: Nittec These elastomers 3 have high elongation and high strength, so there is little possibility of damage to the waterproof layer 2 even when there is ground subsidence. Second Embodiment This embodiment to the fourth embodiment are cases in which it is necessary to provide the fixed layer 5 on the skin. Here, the fixing layer 5 refers to a layer that is interposed between the background and the adhesive primer in order to stably fix the three elastomer layers when the background is extremely uneven.

In this embodiment (see FIG. 2), mortar (cement) is used when the surface soil is very brittle and easily crumbles.
is interposed as a fixed layer 5 between the background and the primer of the adhesive. Mortar has a high cohesive force, and the formed waterproof layer 2 has excellent finished smoothness. Furthermore, the adhesion with the elastomer 3 described above is also good. Next, the construction method will be explained. Mortar is sprayed onto the bare surface on which the waterproof layer 2 is to be formed by a known method. After drying the mortar, the waterproof layer 2 is formed by applying the same method as in the first embodiment.
form. Third Embodiment In this embodiment (not shown, almost the same as FIG. 2), when the background is extremely uneven, foamed-in-place urethane is interposed as the fixing layer 5 between the background and the primer of the adhesive. This in-situ foamed urethane fills the gaps in rocks exposed on the ground.

The in-situ foamed urethane is the same kind of material as the elastomer 3 of the present invention, and has excellent adhesion to the elastomer 3. As for the construction method, a well-known on-site foaming urethane is sprayed onto the skin where the waterproof layer 2 is to be formed. After drying the in-situ foamed urethane, a waterproof layer 2 similar to the first example above is applied.
The waterproof layer 2 is formed by applying the method.

This in-situ foamed urethane has excellent workability in filling gaps, and is optimal for forming the fixed layer 5 when the surface is extremely uneven. Fourth Embodiment In this embodiment (see Figure 3), when the rock surface has many holes and voids here and there and the surface is very uneven, cloth or felt is used as the fixing layer 5 to connect the surface and adhesive primer. interpose between By pasting these cloths or felts on the skin, gaps such as rocks exposed on the skin are filled. This method uses the fixed layer 5 described in the third embodiment.
It is simpler and easier to work with.

[0020] Regarding the construction method, after pasting the cloth or felt along the undulations with many textures with anchors etc.
The waterproof layer 2 is formed by using the same method for creating the waterproof layer 2 as in the first embodiment. As for the cloth or felt, it is preferable to use something relatively soft that can be pasted along the unevenness of the rock. Here, the cloth preferably has a mesh that does not allow the elastomer 3 of the present invention to pass through, and the felt is preferably thick.

[0021]

Effects of the Invention Since the present invention has the above-described configuration, it has the following effects. Effects of the invention as claimed in claim 1 In the invention as claimed in claim 1, the waterproof layer can be formed on a slope whose slope is so large that it far exceeds the angle of repose. This waterproof layer can provide a waterproof layer on the surface of the ground that can be formed even on steep slopes that far exceed the angle of repose, which were previously impossible to form, and on steep slopes that have been cut down. Effect of the invention according to claim 2 The invention according to claim 2 does not require base molding even if the slope on which the waterproof layer is to be formed has a slope so large that it far exceeds the angle of repose. The existing waterproof layer made of rubber sheets can be applied to steep slopes that far exceed the angle of repose, as well as steep slopes that have been cut down, without the need for base forming. A method for creating a waterproof layer can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining a first embodiment of the invention.

FIG. 2 is a perspective view for explaining a second embodiment of the invention.

FIG. 3 is a perspective view for explaining a third embodiment of the invention.

FIG. 4 is a perspective view for explaining a conventional waterproof layer for the skin.

[Explanation of symbols]

3 Elastomer 5 Fixed layer

Claims (4)

[Claims] Claim 1: After applying an adhesive primer to the skin that requires waterproofing, a room-temperature curing elastomer 3 consisting of a main component mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. A waterproof layer on the scalp characterized by being coated and cured. [Claim 2] After applying an adhesive primer to the skin that requires waterproofing, a room temperature curing elastomer 3 consisting of a main component mainly composed of polyol and a curing agent mainly composed of isocyanate is applied. A method for creating a waterproof layer on the skin, characterized by coating and curing. 3. The method for forming a waterproof layer on the skin according to claim 2, wherein the waterproof layer is formed by directly applying an adhesive primer to the skin. 4. The method for producing a waterproof layer for the skin according to claim 2, wherein a fixing layer 5 is provided between the skin and the primer of the adhesive.