JP2005083140A - Method for preventing weed growth on road or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent weeds from growing in a gap between a road pavement and a curbstone or the like. <P>SOLUTION: The weeds 4 and moss growing in the gap 3 generated between the road pavement 1 and the curbstone 2 and dust are removed to be cured with a masking tape 5. A primer is applied in the gap 3 to pour a sealing material stirring to mix cement with a resin emulsion into the gap from a container so as to level a surface with a trowel. Sand is scattered on the surface until the sealing material is dried and solidified and the sealing material is covered with a natural object. When construction extension is long, the sealing material is forcedly fed with a force feed pump from a stirring tank to be jetted from a nozzle so as to fill the gap. The masking tape is peeled to complete working. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for preventing weeds from growing in a gap (crack) between a road pavement and a structure.

  As shown in FIG. 4, road accessory facilities such as curb blocks are installed at the boundary between the road and the sidewalk of asphalt pavement or concrete pavement. In addition, cast-in-place concrete and concrete blocks are also used in the median strip of the road. The joints of the cast-in-place concrete and the joints between the blocks are treated with cement mortar or the like, but no special joint treatment is performed between the pavement and the blocks.

For this reason, traffic loads and vibrations are applied, and the thermal expansion coefficients of the two are different. As a result, gaps (cracks) occur at the boundary with the passage of time from the construction, and weeds are deposited due to accumulation of earth and sand, dust, etc. Start growing. A gap in which similar weeds can occur is likely to occur mainly at the boundary between different materials in the road pavement. However, even if the same kind of material is used, if a gap is generated for some reason, weeds grow.
There is a possibility that weeds will grow not only on ordinary road pavement surfaces but also on pavement boundaries with bridges, retaining walls, building foundations and tower foundations. Can be observed.
JP 2002-154912 A JP-A-8-27757 (Claims, paragraph 16) JP 11-81246 A

Naturally-occurring weeds have strong growth and reproductive potential, and if left untreated, they may destroy the pavement itself by developing the underground stem. You will be forced to cut the weeds. This work often relies on manual work, is costly, and because it is done while the car is passing, workers may be involved in traffic accidents, which is a dangerous work, so it is a lane regulation. It is necessary to take safety measures such as this, but this also contributes to traffic congestion.
In addition, even if only the above-ground part is cut, there is a high probability that weeds will grow again, and after a certain period of time, it will be necessary to cut again, increasing the cost of environmental conservation and maintenance of good roads, etc. Yes.

As a countermeasure against these problems, Patent Document 1 (Japanese Patent Laid-Open No. 2002-154912) discloses a long sheet that suppresses the generation of weeds.
This is effective as a countermeasure for a place having a certain area, but it is difficult to apply to the generation of weeds from a narrow gap targeted by the present invention. In addition, there is a possibility that weeds may grow from the edge of the place where the sheet is installed. To prevent this, there is a method of sticking an adhesive tape to the edge of the sheet. Even if it shows the property, depending on the omission of the work procedure, a gap remains even if the adhesive tape is applied. Moreover, since these gaps reduce the adhesive strength of the adhesive tape, the adhesive strength may disappear in a few years.

Further, as countermeasures against the gap, there are tape-like or heat-melting type sealing materials, but these countermeasures have a drawback that it takes time and cost for construction.
Patent Document 2 (Japanese Patent Application Laid-Open No. 8-27757) describes the growth of weeds by filling a gap between the structures with a vinyl-based emulsion and an adhesive such as a bond (trade name) or a increment (trade name). In addition, Patent Document 3 (Japanese Patent Laid-Open No. 11-81246) discloses that non-shrinkable mortar is filled, but with a vinyl-based emulsion alone, adhesion to gaps is weak, In many cases, the adhesive is peeled off by vibration or rainwater, and the adhesive is costly. Non-shrinkable mortars are prone to cracking under repeated traffic loads after filling, and it has been difficult to prevent the growth of weeds for long periods.
For this reason, a low-cost, easy and effective weed growth control measure is desired.

Therefore, in order to prevent weeds generated in the gap between the road pavement and the structure, a method of filling the gap with a sealing material mainly composed of cement and emulsion has been invented. In addition, by adding various reflecting materials, phosphorescent materials, and fluorescent materials to the sealing material, it is possible to prevent weeds from growing and to make the boundary of the structure visible at night.
The present invention is described in detail below.

  The occurrence of weeds in road pavements targeted by the present invention includes block pavements made of inorganic materials such as concrete pavements, asphalt pavements, interlocking blocks, regardless of roadways and sidewalks, and is the periphery of these road pavements. It includes road gutters made of concrete blocks, road median strips made of cast concrete and concrete blocks, and planting and flowerbed parts made of concrete and blocks on the sidewalk. In addition to road pavements, we cover not only road pavements such as bridge bases, retaining walls, and building foundations, but also weeds that grow in the gaps between all structures.

The sealing material used in the present invention has good adhesion to concrete, asphalt and other road pavement materials, extensibility that can follow the thermal expansion of dissimilar materials, and speed that can complete construction in a short time. It is necessary that the material satisfies the adhesiveness to the wet substrate so that the adhesiveness can be applied under all conditions.
In addition, it is desired that the toughness, stability, coating workability, and environmental adaptability of the coating film are good.

  As a material satisfying the above conditions, an ethylene-vinyl acetate copolymer resin, a polyurethane resin, an epoxy resin, various rubbers, an asphalt, or a water-based emulsion made of a mixture thereof is mixed with cement.

  Hereinafter, in order to help the understanding of the present invention, the gap between the road pavement and the edge of the curb will be specifically described as an example. Needless to say, the present invention is not limited to the following examples.

As shown in FIG. 1 (a), as a pretreatment, weeds 4 grown in gaps (cracks) 3 generated at the boundary between road pavement 1 and curb 2 are cut and removed. It is desirable to remove roots of weeds for each rhizome, but at least the above-ground part must be completely removed. In addition, it will sufficiently remove objects that interfere with work such as moss, dust, dirt, sand and pebbles.
The removal of weeds may be performed manually, but if the extension of the gap 3 is long, the manual removal operation takes time and is inefficient. For this reason, weeding appropriate weeds in consideration of the effects of extending the gap and removing work on the structure, such as weeding machines such as electric cutters, spraying of herbicides, spraying of high pressure water, flame incineration, carbonization by high voltage current, etc. Apply removal means.
The width of the gap 3 after weed removal is preferably 60 mm or less, and if it exceeds 60 mm, coating and filling with only a sealing material is impossible.

  Next, as shown in FIG.1 (b), in order to prevent adhesion of the sealing material to places other than a required location, the masking tape 5 is stuck and curing is performed. This step can be omitted when curing is not required depending on the construction site. As the masking tape, a paper gummed tape can be used.

  In order to ensure adhesion of the sealing material to the gap 3, a primer is applied to the coating treatment surface. The primer may be a known primer, but a resin emulsion constituting the sealing material can be used. Further, as a process, curing with a masking tape may be performed after the primer treatment. The primer is applied by a known coating method such as brush coating or roller coating.

  While stirring 16 kg of resin emulsion with an electric stirrer, 14 kg of cement is added little by little and mixed uniformly to prepare a sealing material. If a stirrer cannot be prepared, mix it manually.

The reinforcement effect of a coating film is acquired by mix | blending a fiber component with a sealing material composition. Usable fibers are acrylic fibers, vinyl fiber nylon, tetron, rayon (each trade name) and the like as organic fibers, and metal fibers such as rock wool, glass wool, steel wool, and aluminum wool as inorganic fibers.
Because it is mixed in the emulsion, it is preferably dispersible in water, and even if mixed, fibers that do not significantly affect the handling of the sealing material are preferable, and short fibers having a thickness of about 100 to 600 μm and a length of about 5 to 10 mm are preferable. .
A mixture ratio is 1-10 mass% with respect to sealing material whole quantity, More preferably, it is a mixture ratio of 3-5 mass%.

The prepared sealing material is applied and filled in the gap 3. Any coating method may be used as long as a uniform coating film can be formed by applying a sealing material. Actually, an optimum method is selected according to the width and shape of the gap 3 to be sealed and the material to be coated.
The sealing material can be applied without waiting for the primer to dry.
When the extension of the gap 3 is short and the construction extension of the coating and filling is short, the method of directly applying the prepared sealing material from the container can be applied, and when the construction extension is long, from the mixer where the sealing material is mixed and prepared It is efficient to apply with a dedicated nozzle that is pumped by a pump and discharged to the required application width. It is also possible to pour into the gap with a handle.

A single coating amount of the sealing material needs to be 150 to 400 g / m. If it is less than 150 g / m, the film thickness necessary for preventing the growth of weeds may not be formed, and it may not be possible to prevent the reoccurrence of weeds.
When the coating is applied over 400 g / m, if the coating atmosphere temperature is sufficiently high (20 ° C. or higher), drying does not require a long time up to about 1 kg / m, and the film thickness can be made sufficiently thick. In addition, the effect of suppressing weed generation is increased. However, if the coating atmosphere temperature is less than 10 ° C., it takes a long time to dry, and a drying time of about 14 hours is required to obtain the dry coating film of about 1 kg / m. . In this case, since the coating work efficiency is remarkably reduced, it is possible to obtain a coating thickness sufficient to obtain a weed generation inhibiting effect by applying a single coating amount to 400 g / m or less and repeating the coating several times. it can.

As shown in FIG.1 (c), the coating surface of the apply | coated sealing material is smoothed, and the coating film 10 of a sealing material is formed. The operation for smoothing is not particularly limited in terms of tools and methods, and the coated surface of the sealing material applied with a scissors, a brush, a roller, a dedicated jig or the like is finished smoothly.
If necessary, the surface of the sealing material is colored in an arbitrary color, or various light reflecting materials, phosphorescent materials, and fluorescent materials are added. Usually, the surface of the coating film of the sealing material becomes familiar with the surroundings with outdoor dust, but it does not look good immediately after application. From the viewpoint of appearance (designability) immediately after application, the designability immediately after application can be enhanced by applying various aggregates such as cinnabar sand to the surface of the sealing material immediately after application. This operation also accelerates drying of the coating film surface, and is preferable in terms of workability.
By mixing various reflectors, etc., the visibility of pedestrians and passing vehicles is improved, and the safety of road traffic is improved by facilitating the confirmation of the position of the structure. Finally, the masking tape 5 subjected to the curing process is removed and the construction is completed.

If the coating apparatus 6 shown in FIG.2 and FIG.3 is used in order to implement this invention, even when construction extension is long, efficient construction can be performed.
The coating device 6 has a material charging port 61 formed in the upper part of a circular stirring tank 62, and the material charging port 61 is provided with a grid so that cement to be charged does not become a lump. The stirring tank 62 is provided with a stirring blade 64, and the stirring blade 64 is rotated by a drive motor 63. A hose is provided at the bottom of the stirring tank 62, and the sealing material prepared in the stirring tank 62 is pumped by a squeeze pump 65 and discharged from a nozzle (not shown). The squeeze pump 65 is driven by a pump motor 66 and is provided with an operation panel 67. A power supply device for supplying power uses a mobile generator or a movable generator.
The application device 6 and a set of machines, tools, materials, etc. necessary for construction are loaded on a truck, light truck, or small truck, and a series of processes of primer application and sealing material application at the construction site are moved at low speed. Install. Even when the construction is several kilometers, it is possible to carry out the construction in a short time by several workers.

Test example As the sealant, ethylene-vinyl acetate copolymer resin (EVA) emulsion with Portland cement added was used, and this seal was made to a length of half the gap where weeds at the boundary between pavement and structure were removed in advance. The material was poured and smoothed with a scissors for sealing.

Comparative Example The remaining half length of the test example that was not subjected to the sealing treatment was used as a comparative example without any treatment.

Result At the place where the sealing treatment was performed, weeds did not grow at all even after 1 year of construction, and the state immediately after construction was maintained. On the other hand, as a comparative example, after removing the weeds, the portion left as it was began to grow again after 1 week, and after 1 month, weeds grew to the same extent as before construction.

  The present invention can stably prevent the growth of weeds over a long period of time, and the construction can be completed easily and in a short time, and there is little impact on traffic even when applied to road pavement. It is an excellent weed growth prevention method.

The construction process figure of this invention. The top view of the coating device of a sealing material. The side view of the coating device of a sealing material. The perspective view in the state where weeds grew in the crevice (crack) of the road.

Explanation of symbols

1 Pavement 2 Curbstone 3 Clearance (crack)
4 Weed 5 Masking tape 6 Coating device 61 Material inlet 62 Stirrer tank 63 Stirrer drive motor 64 Stirrer blade 65 Squeeze pump 66 Pump motor 67 Control panel

Claims (7)

A weed growth prevention method in which a sealing material mainly composed of a resin emulsion and cement is filled in the gap between the boundaries of the structure. A weed growth prevention method in which a sealing material that is gradually mixed with cement is agitated while the resin emulsion is agitated, and is discharged from a nozzle to fill the gaps between the boundaries of the structure. 3. The prevention of weed growth according to claim 1, wherein the resin emulsion is an aqueous emulsion comprising an ethylene-vinyl acetate copolymer resin, a polyurethane resin, an epoxy resin, various rubbers, asphalt, or a mixture thereof. Construction method. The method for preventing weed growth according to any one of claims 1 to 3, wherein short fibers are mixed. 5. The weed growth prevention method according to claim 4, wherein the short fibers are any of synthetic fibers, rock wool, glass wool, steel wool, aluminum wool, or a mixture thereof. The weed growth prevention method according to any one of claims 1 to 5, wherein a light reflecting material, a phosphorescent material, and a fluorescent material are added to the sealing material. The weed growth prevention method according to any one of claims 1 to 5, wherein after the sealing material is filled in the gap, sand is spread on the surface.

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