JP2668064B2 - Filling joints for seams, forming joints for seams, and seam treatment methods for the purpose of suppressing weed growth at the seam between the asphalt pavement side end and the concrete structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention aims at weed control of a seam between a side end of an asphalt pavement road and a concrete structure attached thereto, and in particular, an agricultural road where weeds are apt to thrive. Seam filling jointing material, seam forming jointing material for the purpose of suppressing the growth of weeds at the seam between the asphalt pavement side end and the concrete structure, which prevent the growth of the weeds, on sidewalks, embankments, etc. It relates to a seam processing method.

<Prior art and its problems> In general, agricultural roads and sidewalks are relatively free of vehicles and people, but for this reason, asphalt concrete is used for simple paving. Such roads may have a small amount of traffic and the surrounding natural environment is prone to weeding. In particular, on farm roads and sidewalks where there is a concrete structure such as a U-shaped ditch or an L-shaped gutter on the road shoulder, seeds of weeds flying between the pavement and the concrete structure germinate and grow, and as a result, weeds reach the inside of the pavement. Problems such as invasion, pavement destruction, poor visibility, lack of aesthetics, and the cost of mowing will occur.

When performing conventional asphalt pavement work, if there is a concrete structure on the road shoulder, asphalt emulsion is applied to the side of the concrete structure as shown in the asphalt pavement outline, and the joint with the side edge of the asphalt pavement Was to be joined. However, even if the asphalt emulsion is applied, the side edges of the asphalt pavement and the concrete structure are not completely bonded.
Therefore, in agricultural roads, sidewalks, dikes, etc. where weeds easily grow, weeds began to grow in a short period of time at the joint between the end of the pavement and the concrete structure.

By the way, conventionally, in order to prevent the occurrence of weeds on such roads, a method of previously spraying a herbicide under the pavement surface has been carried out, but it is poor in sustainability and a weed control effect can be expected substantially. Did not. Therefore, the present applicant has previously invented a grass-protected pavement road in which the surface layer is constructed with asphalt concrete mixed with a herbicide or the like. According to the present invention, the pavement has a sufficient weed control effect, but the asphalt pavement side end and the joint between the concrete structures such as the U-shaped groove and the L-shaped gutter may not have a sufficient weed control effect. It was confirmed.

In other words, especially at the seam between the asphalt pavement side edge where weeds are likely to grow and the concrete structure, the seaweed pavement road containing the herbicide is simply seamed using asphalt emulsion as shown in the pavement outline. The reason is that weed control is not enough.

<Means for Solving the Problems> In view of the above, a filling filler for joints or a forming joint for joints for the purpose of suppressing the growth of weeds at the joint between a side end of an asphalt pavement and a concrete structure according to the present invention is asphalt. Phenoxy fatty acid ester or phenoxy fatty acid ester and a herbicide mixed with a mixture of a high molecular weight material and a herbicide, or formed into a belt-like shape, at the seam between the side edge of the asphalt pavement and the concrete structure. It is used to prevent the growth of weeds. In addition, the seam treatment method for suppressing weed growth at the seam between the asphalt pavement side end and the concrete structure according to the present invention, in order to solve the above-mentioned problems, requires the asphalt pavement side end and the concrete structure to be removed. The seam of the above is to be constructed by the above-mentioned filling joint material or molding joint material, so that weed growth from the seam of the pavement side edge and concrete structure where weeds are particularly prone to flourish after pavement is surely prevented. It is.

Here, asphalt and polymer used in a seam-filled joint material, a seam-formed joint material, and a seam treatment method for the purpose of suppressing weed growth at a seam between a side end of an asphalt pavement and a concrete structure according to the present invention. The thing is explained. As asphalt, straight asphalt,
Bron asphalt and mixtures thereof can be used. These can be appropriately selected depending on the place of use, the type and concentration of the drug used. It should be noted that if the used amount of the bron asphalt is increased, the filling and joining material for the joint can be prevented from softening.
As the polymer, natural rubber, styrene-butadiene rubber, synthetic rubber containing isoprene rubber and butyl rubber,
Styrene-butadiene block copolymer, ethylene-
A thermoplastic elastomer comprising a vinyl acetate copolymer alone or a mixture thereof can be used. The amount of the polymer added is not constant depending on the type and penetration of the asphalt, and the type of the polymer added, the copolymer ratio, and the molecular weight, but 5 wt% to 30 wt% may be added.

For convenience of production and use, mineral powder such as stone powder, bentonite, and clay may be added as a filler in order to improve resistance to deformation and easy cutting. . The amount added is preferably 5 parts by weight or less based on 1 part by weight of the polymer.

Next, the herbicide and the phenoxy fatty acid ester will be described.

The chemical used as a herbicide may be any as long as it can be used as a mixture with asphalt and high-molecular substances. However, heat resistance at the production temperature of the asphalt mixture, safety against toxicity, corrosiveness of metals In addition, in consideration of phytotoxicity to agricultural products caused by elution of the drug due to rainwater or the like, those having insolubility in water are preferable. However, it is not always necessary to use one satisfying all of these conditions.

As the herbicide, a non-selective soil treatment type herbicide, which has a high effect on rooting weeds, is stable, and has a long lasting effect, is desirable. For example, phenoxy-based compounds include 3,5,6-trichloro-2-pyridyloxyacetic acid [generic name “tricropyr”;
Dichlorophenoxyacetic acid [2,4-PA] is benzoic-based 3,6-dichloro-2-methoxybenzoic acid [dicamba], 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid [picloram] ], Carbamates include methyl N- (4-aminophenylsulfonyl) carbamate [ashram] and S-ethyl N, N-diisobutylthiocarbamate [butylate], and nitriles include 2,4-dichlorobenzonitrile [dicrobenyl]. ], 2,6-dichlorothiobenzamide [chlorothiamide] and 3, (3,4-dichlorophenyl) -1,1-dimethylurea [diuron], 3, (4-chlorophenyl) -1,1- Dimethyl urea [monuron],
3- (5-Ethylsulfonyl-1,3,4-thiadiazol-2-yl) -1,3-dimethylurea [ethidimulone], 3, (5-tert-butylisoxazar-3-yl) -1, 1-dimethylurea [isouron], 3- (5-t
ert-butyl-1,3,4-thiadiazol-2-yl) -1,
3-dimethylurea [tebutyuron], 3, (5-ethylsulfonyl-1,3,4-thiadiazol-2-yl) -1,3
-Dimethylurea [butitazole] is a dinitroaniline-based compound such as 2,6-dinitro-N, N-dipropyl-4-trifluoromethylaniline [trifluralin], N-butyl-N-ethyl-2,6-dinitro-4. -Trifluoromethylaniline [benephine] is methyl 5- (2,4-dichlorophenoxy) -2 as a diphenyl ether type.
-Nitrobenzoate [Bifenox] is a pyrimidine-based compound such as 5-promo-3-sec-butyl-6-methylpyrimidine-2,4 (1H, 3H) -dione [promasil],
5-Promo-3-isopropyl-6-methylpyrimidine-2,4 (1H, 3H) -dione [isosyl] is 2-chloro-4,6-bis [ethylamino] -1,3,5 as triazine.
-Triazine [simazine], 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine [atrazine], and calcium trichloroacetate [TCA] and 2,2-dichloropropionic acid as fatty acids. [Talapon] and 2,2,3,3-tetrafluoropropionic acid [tetrapion], and inorganic materials such as calcius anamide [cyanamide] and ammonium (or sodium or potassium) thiocyanate [thiocyanate] can be used. These may be used alone, or may be used by being appropriately mixed. And they are 0.001-5.0% of the mixture of asphalt, polymer and filler
(Weight ratio) is preferably used from the viewpoints of effect and environmental pollution prevention. However, the amount of use may be appropriately selected depending on the place of use and purpose of use.

Further, the phenoxy fatty acid ester functions as a repellent for plants and has an effect of preventing invasion of weeds such as buds and roots or tree roots. In the present invention, the phenoxy fatty acid ester is used by paying attention to the fact that it has a particularly large repellent effect on plants. Since the phenoxy fatty acid ester is insoluble in water, there is no danger of elution by rainwater or the like. Therefore, secondary pollution can be prevented from occurring, so that it can be used in a large amount and the effect is long lasting. For example, it can be used in an amount of 0.01 to 5.0% (weight ratio) with respect to the mixture of asphalt, polymer and extender. However, the amount of use may be selected according to the place of use and purpose of use.

In addition, when the applicant performed an experiment on herbicidal (inhibiting the growth and growth of plants) effect by mixing these agents with an asphalt mixture and laying it on the ground, it was found that a combination of a phenoxy fatty acid ester and a herbicide was used. The herbicidal effect was higher in the order of ester alone and herbicide alone. In particular, the difference was remarkably large as compared with the above. Herbicides are originally intended to kill plants that are already growing, but phenoxy fatty acid esters are used to prevent plants from growing in those places when plants are not growing, so weed control Therefore, it was confirmed that the phenoxy fatty acid ester having a repellent effect is more effective than the herbicide.

Next, a description will be given of a method for producing a filling joint material for joints or a molding joint material for joints for the purpose of suppressing weed growth at the joint portion between the side portion of the asphalt pavement and the concrete structure according to the present invention. Filled joints for seams are made by uniformly mixing the asphalt with a polymer to form a modified asphalt, adding the required amount of filler, and finally adding the phenoxy fatty acid ester and, if necessary, a herbicide. You. As a manufacturing apparatus, an apparatus generally used for mixing polymer materials, that is, a can having a heating device and a stirring device, a kneader with a heating device, a calender roll, and the like can be used depending on physical properties such as viscosity of the mixture. Forming into a belt shape, the seam-filled joint material is extruded into a ribbon shape by an extruder, or the seam-filled joint material is cast, extruded,
A sheet having a predetermined thickness may be formed by a roll method or the like, and the sheet may be cut into a predetermined width with an appropriate knife or the like while flowing soap water, or may be cut with a jet water stream.

Next, a method for producing a joint filling joint material or a joint molding joint material for the purpose of suppressing weed growth at the joint portion between the asphalt pavement side end portion and the concrete structure according to the present invention will be described based on Examples. .

<Example 1> 800 g of straight asphalt having a penetration of 175 was heated and melted, and 200 g of a styrene-butadiene copolymer was charged.
It was kept at 170 ° C and stirred for 3 hours to dissolve uniformly. And while maintaining the same temperature and continuing stirring, cold water powder 1000 as an extender
g was gradually added, and the mixture was further mixed for 1 hour. 10 g of phenoxy fatty acid ester was added and mixed for 10 minutes. After that, heating and stirring were stopped, and the mixture was naturally cooled to produce a seam-filled joint material containing phenoxy fatty acid ester.

<Example 2> In the same manner as in Example 1, 10 g of phenoxy fatty acid ester was added and mixed for 10 minutes, then heating and stirring were stopped, and this was poured into a mold with release paper so as to have a thickness of 5 mm. After cooling, the mixture was cut with a knife under a drop of soapy water to a width of 3 cm to produce a joint-forming material containing phenoxy fatty acid ester. This product adhered to the vertical surface of cement concrete even at 0 ° C. and did not drop, and passed the dripping test at 70 ° C.

<Example 3> 900 g of straight asphalt having a penetration of 175 was heated and melted, and 100 g of an ethylene-vinyl acetate copolymer (vinyl acetate content: 15%) was charged. Then, while maintaining the same temperature and continuing stirring, 1000 g of industrial stone powder was gradually added as a bulking agent, and further added.
Heat and mix for 1 hour, add 10 g of phenoxy fatty acid ester and add 1
After mixing for 0 minutes, heating and stirring were stopped, and the mixture was naturally cooled to produce a phenoxy fatty acid ester-containing joint filling joint material.

<Example 4> In the same manner as in Example 3, 10 g of phenoxy fatty acid ester was added, and the mixture was mixed for 10 minutes. After that, heating and stirring were stopped, and the mixture was poured into a mold on which release paper was laid, and a cylinder having a length of 20 cm and a diameter of 5 cm was used. It was allowed to cool as a mass. This lump was put into an extrusion molding machine, extruded into a ribbon having a thickness of 5 mm and a width of 3 cm, wound up with release paper sandwiched therebetween, and a joint joining material containing phenoxy fatty acid ester was produced. It adheres to the vertical surface of cement concrete even at 0 ° C and does not fall.
Also passed the temperature drop test.

<Example 5> 700 g of blown asphalt having a penetration of 27 was melted by heating, and ethylene-vinyl acetate copolymer (vinyl acetate content 15
%), And the mixture was stirred at 60 ° C. for 60 hours to be uniformly dissolved. Then, while maintaining the same temperature and continuing stirring, 3000 g of cold water powder was gradually added as an extender, and the mixture was heated and mixed for another hour. And to this, trifluralin as a herbicide
10 g of phenoxy fatty acid ester and 20 g of phenoxy fatty acid ester were added and mixed for 20 minutes, heating and stirring were stopped, and this was naturally cooled to produce a herbicide and a phenoxy fatty acid ester-containing joint filling joint material.

<Example 6> In the same manner as in Example 5, 10 g of triflaralin and 20 g of phenoxy fatty acid ester were added and mixed for 20 minutes. After that, heating and stirring were stopped, and the mixture was poured into a mold on which release paper was laid, length 20 cm, diameter It was allowed to cool as a 5 cm cylindrical mass. This lump was put into an extrusion molding machine, extruded into a ribbon having a thickness of 5 mm and a width of 3 cm, and wound with a release paper therebetween to produce a seam-forming joining material containing a herbicide and a phenoxy fatty acid ester. This product adhered to the vertical surface of cement concrete even at 0 ° C. and did not drop, and passed the dripping test at 70 ° C.

Next, an example of construction of a joint treatment method for suppressing weed growth at a joint between an end portion of an asphalt pavement and a concrete structure according to the present invention will be described with reference to the drawings.

<Construction Example 1> The seam-filled joint material manufactured in Example 1 was injected into the seam 3 between the surface layer 1 of asphalt pavement and the U-shaped groove 2 made of concrete while heating to 170 ° C to have fluidity. And seam 3 was filled with a seam filling joint material. After two years, the site was examined and no weeds were found.

<Example 2 of execution> In the L-shaped side groove 4, the joint forming material 5 for seam manufactured in Example 2
And the surface layer 1 of asphalt pavement was paved. After two years, the site was examined and no weeds were found.

<Effects of the invention> As described above, a seam-filled joint material, a seam-formed joint material, and a seam treatment for the purpose of suppressing the growth of weeds at the seam between a side end of an asphalt pavement and a concrete structure according to the present invention According to the method, the joint between the side end of the asphalt pavement where the weeds are particularly likely to occur and the concrete structure is filled with a phenoxy fatty acid ester having a large repellent effect on plants, and a seam-filling material or seam-forming joint. It can be easily constructed with materials. In addition, since the drug is mixed with asphalt, etc., the drug can effectively exert its effect on weeds, etc., and since the drug is coated and fixed with asphalt, the drug is eluted by rainwater etc. Since it can be prevented, the effect of the drug can be connected for a long period of time, and the drug hardly elutes in rainwater or groundwater, and since the chemical damage to agricultural crops is unlikely to occur, it can be applied even on agricultural roads.

[Brief description of the drawings]

The drawings are cross-sectional views showing an embodiment of a seam treatment method for suppressing weed growth at the seam between the asphalt pavement side end and the concrete structure according to the present invention. 1 …… Surface layer 2 …… U-shaped groove 3 …… Seam 4 …… L-shaped groove 5 …… Molding joint material for seam

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-183752 (JP, A) JP-A-62-253802 (JP, A) Jitsukoku Sho-50-12895 (JP, Y1)

Claims (5)

(57) [Claims] 1. Weed growth suppression at a seam between a side edge of an asphalt pavement and a concrete structure, wherein a mixture of asphalt and a polymer is mixed with a phenoxy fatty acid ester or a phenoxy fatty acid ester and a herbicide. Filled joint material for seams for the purpose. 2. A joint between a side end of an asphalt pavement and a concrete structure, wherein a mixture of asphalt, a polymer and a filler is mixed with a phenoxy fatty acid ester or a phenoxy fatty acid ester and a herbicide. Filled joint material for joints for the purpose of suppressing weed growth. 3. An asphalt pavement side end, a concrete structure, and a phenoxy fatty acid ester or a phenoxy fatty acid ester and a herbicide mixed with a mixture of asphalt and a polymer, and formed into a belt shape. Jointed material for seams for the purpose of suppressing weed growth at seams. 4. An asphalt pavement side end and a concrete obtained by mixing phenoxy fatty acid ester or phenoxy fatty acid ester and a herbicide into a mixture of asphalt, a polymer and a filler, and forming the mixture into a belt shape. A jointing material for joints for the purpose of suppressing weed growth at joints with structures. 5. A seam filling joint material in which a seam portion between an asphalt pavement side end portion and a concrete structure is mixed with a mixture of asphalt and a polymer and a phenoxy fatty acid ester or a phenoxy fatty acid ester and a herbicide are mixed. Alternatively, a seam treatment method for suppressing weed growth at a seam portion between an end portion of an asphalt pavement and a concrete structure, which is constructed by using a molded joint material for seams.