JP2002069963A - Reinforcing method of water channel and reinforcing member therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy and inexpensive reinforcing method of a water channedl and a reinforcing member therefor. SOLUTION: The reinforcing method is provided to reinforce a concrete face along which water passes and is characterized in that resin mortar that a resin is mixed with an elastic material as an aggregate is applied on the concrete face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water channel reinforcing method and a reinforcing material.

[0002]

2. Description of the Related Art It is known that dams, especially sabo dams, are damaged or polished at portions through which water passes. The sabo dam is used to block earth and sand from the upstream and prevent the river bottom from becoming shallow, and to prevent disasters caused by the sudden flow of the earth and sand downstream when the water is increased.

Therefore, the sabo dam basically does not have a function of adjusting the flow rate of water. When a certain amount is accumulated, it is allowed to overflow from there. At this dam, sediment and rocks accumulate at the bottom, and the upper layer of water overflows and flows downstream. Therefore, sediment gradually accumulates at the bottom of the dam, and the function is not fulfilled. Therefore, either the soil is removed and the bottom is deepened, or a new dam is created by leaving it alone.

[0004] Because of this, after a certain period of time, a certain amount of earth and sand is deposited, and water is constantly overflowing. At this time, there is no problem if you can walk quietly, but if there is a little momentum, the earth and sand will flow together to some extent. This flow of earth and sand grinds and cuts the dam.

[0005] In addition to the overflow, the same occurs in the drain hole at the bottom of the dam.

[0006] When earth and sand pass through the concrete surface at a considerable speed, the concrete is shaved in a short period of time (several years). For this reason, it is conceivable to cast concrete using a hard aggregate or to attach a reinforced rubber-like plate to the portion.

[0007]

However, it has been found by the inventor's experiments that the life of hard concrete is not different from that of the conventional concrete. Although a reinforced rubber plate is relatively effective, it is very expensive and is not suitable for a large area. There is also a disadvantage that it cannot be constructed on site.

[0008]

In view of the above situation, the present inventor has completed the reinforcing method and the reinforcing material of the present invention as a result of diligent research, and the feature of the present invention is that the reinforcing method is different from that of the present invention. Is a method for reinforcing a concrete surface through which water passes, in which a resin mortar in which an elastic material is mixed as a resin and an aggregate is applied to the surface, and water passes through the reinforcing material. The present invention is characterized in that a resin mortar in which an elastic material is mixed with a resin and an aggregate is molded along the surface of a concrete surface to be bonded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The water passages referred to here include not only the water passages of the sabo dam described above, but also overflow portions of general dams, water passages, river bottoms (steps at low rivers, etc.), side walls of rivers, Refers to all areas where water, sand, and stones can pass, such as river terraces.

The present invention reinforces by applying a resin mortar. At this time, the point is that the aggregate is made to have elasticity contrary to the conventional one.

The elastic material mentioned here is rubber, soft plastic such as soft polyurethane, or the like. If you use waste tire chips or automobile bumper chips,
It is not only inexpensive, but also contributes to waste disposal. The size is not particularly limited and generally ranges from 0.1 to
It is about 10 mm (as an average particle size). The shape may be any shape such as a crushed shape or a spherical shape. The elastic material may be subjected to a surface treatment (including washing and the like) so that the elastic material adheres well to a resin described later.

Since a soft and elastic material is used as an aggregate, when sand or stone collides with water, the impact is absorbed by deforming the resin, so that the resin itself is rarely scraped off. Also, if the whole is like a piece of rubber, the impact will be received by the entire deformation,
Local deformation is small, and a great effect like the present invention cannot be expected.

The resin may be any of urethane, epoxy, polycarbonate and the like, and need not be special. However, soft materials such as soft polyurethane and flexible epoxy are preferred.

Further, although the problem is small in a newly constructed dam or the like,
In ordinary repairs and the like, the part is naturally wet. Therefore, a polysulfide-modified resin that is not affected by curing or adhesion due to the presence of a small amount of water is preferable.

[0015] The polysulfide-modified resin is one in which one or more units containing S are contained in the main chain or side chain. Of course, the polymer is a collection of various molecular weights, and since the S content in the monomer unit may be different, the average amount of S is about 0 to 3 units.

More specifically, -X- (R1-Sa) b-
R2 -Y- (polysulfide chain) is contained in the main chain or side chain.

Here, R 1 and R 2 are divalent methylene groups
(-CH2-), a divalent dimethyl ether group (-CH2
OCH2-), divalent isopropanol group (-CH2 C
H (OH) CH 2 —), a divalent ethanol group (—CH 2
CH (OH)-) and (-CH2 CH2 OCH2 O
CH2 CH2-), (-CH2 CH2 O-), etc.
These may be one or more, and may be a combination thereof. R1 and R2 may be the same or different.

X and Y are groups selected from -S-, -O- and -NH-. a is 0 to 5 for each repeating unit
And b is an integer of 1 to 50. However, when a is 0 for all the repeating units, at least one of X and Y is a -S- group. a is preferably 1 to 2.5.

It is sufficient that the above-mentioned polysulfide chain is located somewhere in the structure of the resin.

For example, in the case of epoxy, the synthesis method comprises the addition of a sulfur-containing monomer or oligomer having a reactive functional group (including a prepolymer) and an epoxy prepolymer having two or more epoxy groups in a molecule. It is synthesized by a reaction or, for example, an addition reaction of a polysulfide polythiol and an epoxy prepolymer.

In the case of urethane, the one-component urethane contains a polysulfide chain in part or all of the main chain of the molecule, and the two-component urethane similarly contains a polysulfide chain in the prepolymer and / or the curing agent. Should be included. In the case of the two-pack type, the polysulfide resin (terminal S
H) may itself be a curing agent.

Further, in order to enhance the effect of preventing the resin itself from being ground or broken, the resin may be reinforced by mixing short fibers.
For example, a polyimide fiber with a length of about 1 mm
About 0.1 to 1.0% by weight is mixed. Of course, the material of the fiber may be carbon, glass, polyester, cotton yarn, or any other reinforcing material.

The mixing ratio of the resin and the elastic material should be determined according to the size of the elastic material and the type of the resin, and is not particularly limited. However, usually, elastic material / resin = 5/1 to 1/3
(Weight ratio). Any material other than the elastic material may be mixed with the resin as long as it does not deviate from the gist of the present invention. For example, pigments, ultraviolet absorbers, and the like.

The aggregate used in the present invention may be a single elastic material as described above, or may be a material having a surface material fixed around the elastic material via an adhesive. In this way, the elastic material as a whole can be deformed, but is missing from the resin of the elastic material,
Scattering is significantly reduced. Even if the adhesion between the resin and the rubber is poor, the surface material allows the adhesion to be very good.

The surface material mentioned here may be particles or powder of silica sand, cement powder, inorganic powders such as calcium carbonate, silica, ceramics and the like, or organic powders such as pulverized plastics. It may have a body or an irregular shape. It may be a long one such as fiber or a fine powder such as fly ash.

The size of the surface material is 0.01 μm to 1 mm
To the extent, it may be larger depending on the size of the elastic material. The size of the surface material may be determined based on the relative relationship with the elastic material. In the case of a fiber or the like, the length may be the same as the diameter of the elastic material (the longest diagonal line).

The surface material is not limited to one type, and a plurality of types may be used. In particular, the larger ones may be fixed first and the smaller ones partially fixed thereafter. In this way, the aggregate has a larger uneven surface as a whole.

In particular, when a fiber-like material is used as the large surface material, it is considered that the resistance when the aggregate is detached is large.

In order to fix the surface material to the elastic material to which the adhesive has adhered, the surface material may be applied to the elastic material. For example, the elastic material coated with a resin (adhesive) can be freely rolled in the surface material, the surface material is sprayed on the elastic material, or the elastic material is put into a container containing the surface material and stirred. The fixation of the surface material is simple because it only has to adhere to the entire periphery of the elastic material. Excess material does not adhere, and the surface material naturally adheres to the portion where the resin is exposed. After being fixed, an excess surface material may be removed with a sieve.

Fixing work of this adhesive and surface material (process)
Is not limited to once, and may be performed a plurality of times. After applying the adhesive, a large and small surface material may be mixed and adhered.

The surface material particles tend to preferentially adhere to the surface of the adhesive as the adhesion area with respect to the weight increases.

When the surface material is wrapped around after the adhesive is applied, the surface material does not always form a single layer and cover the entire surface uniformly. That is, there is a case where something is buried in the adhesive. In the present invention, all may be buried, but if part of the surface material located on the most surface is not covered with the resin, the physical and chemical properties of the surface material surface can be utilized. In many cases, the adhesion to the solidified material becomes good.

Next, a description will be given of a reinforcing material manufactured in advance in a factory or the like instead of directly applying the above-mentioned resin mortar on site.

It is only necessary to pour and harden the resin mortar described above into a predetermined mold. The shape such as a flat plate shape, a pipe shape, a block shape, a gutter shape, or the like may be changed depending on a place where it is used.

If this reinforcing material is used, it can be very simply and quickly reinforced only by sticking it on site.

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

[0037]

FIG. 1 is a partial perspective view of an example of a sabo dam 1 in which a reinforcing method according to the present invention is carried out. In the case of Sabo Dam 1,
Since there is no idea to adjust the flow rate or store water, the water always overflows from the upper opening 2 when a predetermined amount of water is stored. Naturally, sand and pebbles are entrained and the opening 2
To be polished. When this is rainy, it lasts 24 hours and many days. Therefore, it is natural that the shape of the opening is deformed and the overflow amount differs from the design. At fast spots, repairs will have to be made in a few years.

In this figure, the resin mortar 3 of the present invention is applied around the opening 2. In this example, the coating thickness is 2
0 mm. The resin is a polysulfide-modified epoxy resin, and the elastic material is a waste tire chip. The size of the elastic material is a mixture of about 0.5 to 5 mm. A urethane-based adhesive is applied over the entire surface of the elastic material (the adhesive is about 7.5% (weight) with respect to the elastic material),
Cement powder (surface material; approx. 40% (weight) based on elastic material) is applied evenly to the entire surface when urethane is uncured and then cured. The urethane / cement layer firmly adheres the modified epoxy resin and elastic material The polysulfide-modified epoxy resin is a resin whose viscosity is adjusted to "Flep 60" of Toray Thiokol Co., Ltd.
As the curing agent, an aliphatic polyamine-based curing agent is used. Calcium carbonate powder (10% with respect to the resin) was added to the resin to give it viscosity and thixotropic properties.

After mixing the main agent and the curing agent (calcium carbonate is well mixed with the curing agent in advance), the elastic body is thoroughly mixed with the resin (resin: elastic body = 100: 60),
The surface to be coated was coated with a thickness of 20 mm using a trowel. The surface to be coated is roughened with a disk sander, and the same resin as above is applied as a primer at about 300 g / m ² .

Although the sabo dam portion juxtaposed to the opening 2 is a concrete portion, the state of polishing was examined after 6 months from practical use together with the elastic mortar portion (hardening). The surface coated with the polysulfide-modified resin and the elastic material mortar was hardly polished, but the concrete portion was polished, and it was found that the surface was polished 10 times or more in volume.

The same applies to the earth and sand hole 4 located below, and the above resin mortar is applied. This part is also a severely worn down place.

[0042]

According to the present invention, there are the following advantages. (1) Since the resin mortar aggregate is an elastic material, the energy of impact and grinding is absorbed and reduced by deformation, so that the resin mortar itself is less damaged or worn. (2) Since the wear of the reinforcing portion is reduced, the life of the dam or the like is extended. (3) It is inexpensive as compared with the conventional method of applying a resin mortar to a hard aggregate or sticking a rubber plate. (4) When an elastic material using a surface material is used, dropout or scattering of the elastic material is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of an example of a sabo dam in which a reinforcing method according to the present invention is performed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sabo dam 2 Opening 3 Resin mortar 4 Sand hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideharu Nagata 9-17, Higashitakatsu-cho, Tennoji-ku, Osaka-shi, Osaka F-term in Osada Giken Co., Ltd. 2D018 AA02

Claims (6)

[Claims] 1. A method for reinforcing a concrete surface through which water passes along its surface, comprising applying a resin mortar in which an elastic material is mixed as a resin and an aggregate to the surface. Waterway reinforcement method. 2. The method for reinforcing a water channel according to claim 1, wherein said aggregate has a surface material adhered to its periphery with an adhesive. 3. The method according to claim 1, wherein the resin is a polysulfide-modified resin. 4. A water channel reinforcing material which is attached to a concrete surface through which water passes, and is formed by molding a resin mortar in which an elastic material is mixed as a resin and an aggregate along the surface. 5. The water channel reinforcing material according to claim 4, wherein said aggregate has a surface material adhered to its periphery by an adhesive. 6. The water channel reinforcing material according to claim 4, wherein the resin is a polysulfide-modified resin.