JPH116103A - Soil pavement material, soil pavement mechanism, and conditioning method for raw material for soil pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve aesthetic properties of soil by mixing one or more materials selected from among decomposed weathered granite, sandy soil, soil, sand, volcanic ash, crusher-run, and screenings and an acrylic resin emulsion containing asphalt. SOLUTION: If the amount of an acrylic resin emulsion containing asphalt as a binder added to a raw material such as decomposed weathered granite is less than 1%, its water and wear resistance declines. When the binder accounts for more than 10%, water permeability decreases. Therefore, preferably the amount of the binder should be 1 to 10%. A soil pavement material obtained this way is spread on a base course and finished by rolling compaction. Therefore, the pavement retains its natural aesthetic properties, does not produce dust on fine days and the mud on rainy days, exhibits appropriate cushioning properties, the characteristic of soil, and provides foot-friendly walkability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth-based pavement capable of improving the occurrence of dust in fine weather, mud in rain, difficulty in repair, etc. while maintaining natural texture of the soil and moderate cushioning properties. Material and soil-based pavement structure.

[0002]

2. Description of the Related Art In a modern society in which urbanization has progressed and a road network has been improved, the consciousness of pavement has changed from emphasizing conventional functionality to harmony with the surrounding environment, expression of regional individuality,
Landscape paving is shifting to emphasis on friendliness, moisture and comfort. Above all, soil-based natural color pavement has been researched and developed as an example of a highly functional pedestrian-based material. However, there is a problem that dust such as sand and dust tends to be generated when the weather is fine, and mud tends to be generated when the rain falls on natural soil such as a sandy soil. Therefore, various types of soil-based pavements, specifically, cement-based, asphalt-based, and resin-based soil-based pavements have been studied, and a pigment or an aggregate having a soil color is mixed and kneaded to generate the dust. Attempts have been made to prevent the formation of mud.

[0003]

However, none of the conventional natural natural color pavements has satisfactory properties. That is, since the cement system is too hard, the natural texture of the soil is impaired. The original natural soil road surface has moderate cushioning about hardness,
Although it has excellent walking properties, the cement-based road surface is too hard, so that it is easy to get tired by walking, and easily injured when a child falls down. In addition, there is a problem such as generation of cracks during operation. Further, there is a problem that it is difficult to perform partial repair, and repair marks remain. In addition, asphalt-based resin is excellent in abrasion resistance but low in strength, and resin-based resin has sufficient strength but has a problem in abrasion resistance. Therefore, in any case, as a result of the pavement surface being eroded by rainwater or being scraped off by walking friction, the landscape is spoiled in a short period of time.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and is selected from the group consisting of masago, sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings as an earth-based pavement material. One or two or more materials (hereinafter, referred to as raw materials such as masago) and an asphalt-containing acrylic resin-based emulsion (hereinafter, referred to as Park Lane S binder) are mixed. Further, it is characterized in that the raw material such as the above-mentioned masago, an asphalt emulsion, and an acrylic resin-based emulsion are mixed. further,
As an earth-based pavement structure, an earth-based pavement material obtained by mixing the raw material such as the masago and the Park Lane S binder is laid on a roadbed and finished by compaction, or the ash-based material and the asphalt are mixed. It is characterized in that an earth-based pavement material obtained by mixing an emulsion and an acrylic resin-based emulsion is laid on a roadbed and rolled to finish.
In addition, as a method of adjusting the raw material for the earth-based pavement, a binder and water are added to the raw material such as the masago to adjust the value to the optimum water content ratio.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Raw materials such as masago in the present invention are not particularly limited in their particle size and production place, but may be any. However, in consideration of its mixing property, workability and its properties, the passing amount of the 2.36 mm sieve is 6
It is desirable to use one having a particle size of about 0 to 90%.

[0006] The Park Lane S binder (o / w emulsion) in the present invention does not specify a method for producing the binder, and is used in various asphalt emulsions (cationic, nonionic, anionic) to form an acrylic acid monomer. Any of those obtained by polymerizing a resin containing as a main component, those obtained by emulsifying or mixing an acrylic emulsion and various asphalts, and those obtained by mixing various asphalt emulsions and an acrylic emulsion Good. The proportion of the acrylic polymer in all particles (total solid content) in the Park Lane S binder is 1 to 99% by weight, preferably 5 to 95% by weight, and more preferably 10 to 9% by weight.
0% by weight. The ratio of the residual evaporation (solid content) in the Parker S binder is 1 to 98% by weight, preferably 10 to 90% by weight, and more preferably 30 to 80% by weight. As asphalt,
Asphalt for various paving (including modified asphalt),
A mixture containing petroleum resin (common name: decolorized asphalt) or the like can be used. The acrylic resin-based emulsion is composed of a polymer mainly composed of an acrylate monomer and / or a methacrylate monomer (hereinafter, these are collectively referred to as an acrylate ester monomer). Examples of acrylic ester monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, Isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, isopentyl (meth) acrylate, n- (meth) acrylate
Hexyl, isohexyl (meth) acrylate, (meth)
N-heptyl acrylate, isoheptyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl (meth) acrylate, (meth) Isononyl acrylate, n-decyl (meth) acrylate,
Isodecyl (meth) acrylate, n (meth) acrylate
-Undecyl, n-dodecyl (meth) acrylate, palmityl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) acrylate, and the like. The ester monomers can be used alone or in combination of two or more. Further, among these acrylic ester monomers, an alkyl (meth) acrylate having an alkyl group having 1 to 12 carbon atoms is preferable, and methyl methacrylate and n-butyl acrylate are more preferable.
2-ethylhexyl acrylate and isononyl acrylate. Other monomers that can constitute the polymer aqueous emulsion are those that can be copolymerized with the acrylic ester monomer. Examples of the monomer include an aromatic vinyl monomer, a vinyl cyanide monomer, a hydroxyalkyl ester monomer of an ethylenically unsaturated carboxylic acid or an ester derivative thereof, and an ethylenically unsaturated carboxylic acid amide monomer. Monomer, ethylenically unsaturated acid monomer, ethylenically unsaturated sulfonic acid ester monomer, ethylenically unsaturated alcohol monomer or its ester derivative, ethylenically unsaturated ether monomer, ethylenically unsaturated amine unit Monomers, ethylenically unsaturated silane monomers, vinyl halide monomers, aliphatic conjugated diene monomers and the like can be used. These can be used alone or 2
Although a mixture of more than one species can be used, it is preferable to use an ethylenically unsaturated acid monomer and a monomer other than the ethylenically unsaturated acid monomer in combination.

[0007] In the earth-based pavement material of the present invention, the amount of the Park Lane S binder added to the raw material such as masago is not particularly limited, but is about 5% based on the dry weight of the material used. Standard. More specifically, when the amount of the binder is less than 1%, the effect as a so-called binder is insufficient, and as a result, water resistance and abrasion resistance are reduced. When the amount of the binder is more than 10%, the water permeability becomes poor. Therefore, the amount of the binder is preferably 1 to 10%, and more preferably 3 to 8%. The method for adjusting the raw materials such as the above-mentioned sand sand is as follows. First, determine the natural water content of the raw materials used in advance, such as masago, and determine the optimum water content and maximum dry density using only water without using a binder according to the soil compaction test by compaction (JIS A 1210). Ask. Then, the water content during compaction should be adjusted to the value of the optimum water content by the total amount of the binder and water as shown in the following formula, and the density of the specimen should be near the maximum dry density Is desirable.

(Equation 1) Further, the added amount of the Park Lane S binder is such that the uniaxial compressive strength of the 7-day curing is sufficient strength (10 kgf / cm ² ) as a pedestrian pavement, and the residual strength ratio is 50% or more after the 7-day curing. Is determined within a range that satisfies the standard of maintaining In addition, it can be considered that the higher the residual strength ratio, the more flexible (sticky). If these criteria are not satisfied, it is necessary to adjust the binder amount. Incidentally, the earth-based pavement material of the present invention can be obtained by preparing a Park Lane S binder in advance as described above and mixing it with a raw material such as masago, as well as a masago or the like. It can also be obtained by mixing a raw material, the various asphalt emulsions described above, and an acrylic resin-based emulsion. In addition,
In this case, the blending ratio of the asphalt emulsion and the acrylic resin emulsion may be set so as to be 1 to 10% with respect to the dry weight of the raw material such as masago.

[0008] In order to implement and construct an earth-based pavement using the material of the present invention, it is desirable to carry out the procedure as shown in FIG. Hereinafter, the construction procedure will be described with reference to FIG.

(1) Subbase / Uneven Leveling Subbase The subbase used in the present invention is basically a granular subbase. Care should be taken to make the roadbed smooth and uniform in thickness.

(2) Formwork installation If there is no curbstone etc. at the vertical edge (side surface) of the construction site or across the starting and ending points, it is desirable to install a formwork.

(3) Mixing The mixing of the material of the present invention is performed on site, for example, by a mortar mixer.

(4) Spreading Spreading is carried out manually using a rake, as in a normal asphalt mixture, or by using an asphalt mini-finisher.

(5) Rolling Rolling is performed by, for example, initial rolling and finishing rolling.
The initial compaction is sufficiently compacted using, for example, a vibro plate. Finish compaction is performed for the purpose of correcting unevenness caused by initial compaction.

(6) Top Coat The top coat is, for example, a mixture of an acrylic resin emulsion and water in a ratio of 1: 3, and is sprayed on the surface of the material immediately after compaction.

(7) Surface Finishing The surface finishing is performed to give a more natural texture, and a finishing material having a small particle diameter is sprayed immediately after the top coat is sprayed.

(8) Curing Although the curing period depends on the weather, it is a guideline for about two to three days in fine weather.

The earth-based pavement structure thus obtained has the following features. Utilizing the color tone of raw materials such as masago, it produces calm colors without impairing the natural environment. It has a moderate cushioning characteristic of the soil, and provides a foot-friendly walkability. There is no dust in fine weather or mud in rain. Excellent wear resistance to walking. There is little erosion due to rainwater, and the original water permeability of raw materials such as masago is not impaired. Since no cement-based hardener is used, there is no adverse effect on surrounding vegetation. Repair is easy. Therefore, such an earth-based pavement structure can be applied to the following places. Promenades Parks and cemeteries and other gardens Shrines and temples approach parks and other parks Community plazas Around clubhouses for leisure facilities Passages for restaurants, inns and houses

[0018]

【Example】

Example The construction outline is as shown below. Construction scale: width: 2m, extension: 85m, area: 170m
² , Thickness: 5cm

The composition is as shown below. Asphalt-containing acrylic resin-based emulsion (trade name) "Park Lane S Binder" (manufactured by Maeda Road Co., Ltd.) was used, and as raw material, Ibaraki-produced sand sand. Then, 5% of the binder described above is blended with respect to the dry weight of the masago, and the soil-based pavement material (here, “Parcrane S”
). Also, as a top coat (product name)
"Park Lane S Topcoat Agent" (Maeda Road Co., Ltd., acrylic resin emulsion) was used. And
A mixture obtained by mixing the above “Percrene S top coat agent” and water at a ratio of 1: 3 was used. (1) Mixing Mixing of the above-mentioned “Parke Lane S” was performed on site using a mortar mixer. The measurement of the masago was performed by volume measurement using a small backhoe, and the graduated enamel beaker was used for the measurement of the binder. For the addition of the binder, a sprinkler from which the water spout was removed was used, and the binder was added little by little so that no lump was formed. The mixing amount at one time was about 60% of the mortar mixer capacity, and the mixing time was about 1 minute after the addition of the binder. (2) Spreading Spreading was performed manually using a rake. The spread thickness was 1.5 times the finished thickness. (3) Initial compaction Initial compaction was sufficiently compacted using a vibro plate. (4) Finish Rolling Finish rolling was performed using a hand guide roller for the purpose of correcting unevenness caused by initial rolling. (5) Top Coat If the surface of "Parke Crane S" is dried, it hardly penetrates. Therefore, before drying, the top coat of the above-mentioned composition was uniformly sprayed using a jar. In addition, the spraying amount was 0.5 liter / m ² at which good results were obtained in the laboratory test. (6) Surface finishing The surface finishing is performed to give a more natural texture, and the surface of the material that has passed through a sieve of about 2.5 mm of “Parcrane S” immediately after spraying the top coat is applied to the surface with a scoop at 1 kg / kg. m ^{2 and} spread evenly with a broom. (7) Curing Cured for 2 days and opened.

1 to 10% of Park Lane S binder was blended with the sand, and 10 kinds of Park Lane S were produced. The properties of the obtained ten kinds of "Parke Lane S" were compared in the following nine items, and the results are shown in Table 1. -Color Tone was visually observed and a color difference meter was used, but the color tone of the raw materials was not impaired, and no significant difference occurred.・ Strength The evaluation was performed in accordance with the Handbook of Pavement Test Method (uniaxial compression test method for road cement with regenerated cement and asphalt emulsion stabilization treatment).
/ Cm ² or more, all were evaluated as ◎. -Flexibility Evaluation was made in accordance with the pavement test manual as in the case of the above-mentioned strength, but all were evaluated as ◎ since all target curing strengths of 50 days or more were achieved after curing for 7 days. -Elasticity Elasticity was evaluated based on the pavement test method handbook separate volume (elasticity test method). Those equivalent to or higher than the conventional product were evaluated as ◎ if they were even better than the conventional product. -Water resistance The specimens cured in the air for 7 days were immersed in water for 24 hours and evaluated. Those equivalent to or higher than the conventional product were evaluated as ◎ if they were even better than the conventional product. -Abrasion resistance Evaluation was performed using a labeling tester equipped with a nylon brush instead of a chain. Those that are equal to or better than conventional products and that are even better than conventional products
Was evaluated. -Resistance to freezing and thawing Evaluated by a uniaxial compression test and abrasion test after freezing and thawing. Those equivalent to or higher than the conventional product were evaluated as ◎ if they were even better than the conventional product.・ Permeability Evaluation was made based on the permeability test of soil. If the permeability is one digit lower than the permeability of the raw material, for example, 10 ^-1
In the case where the value was 10 ⁻² , a material equivalent to the raw material was evaluated as ◎.・ Economical Efficiency was evaluated in consideration of the paving cycle and the pavement unit price. Unfavorable ones were evaluated as x, less preferable ones as △, excellent ones as 〇, and particularly excellent ones as ◎.

[Table 1]

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be implemented in any manner unless the configuration described in the claims is changed. be able to. For example, although the above-described embodiment has been described with reference to a true sandy soil, a material selected from sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings may be used. Even if the above materials are selected, the same can be implemented. further,
It is also possible to adjust the color tone by adding a pigment. Also, asphalt emulsion and acrylic resin-based emulsion are prepared separately, without using asphalt-containing acrylic resin-based emulsion prepared in advance,
Both of the above are mixed in advance, or without mixing,
It is also possible to obtain an earth-based pavement material by mixing with raw materials such as masago. When the natural water content of a material such as masago is extremely high and it is difficult to adjust the water content, it is possible to adjust the water content by adding and mixing synthetic fibers or vegetable fibers. Further, the durability can be improved by adding fibers.

[0022]

As described above, the soil-based pavement material of the present invention maintains the natural texture of soil,
There is no mud or the like during rainfall, and there is an appropriate cushioning characteristic of the soil, and a foot-friendly walking property can be obtained. Further, repair is also easy. Therefore, such an earth-based pavement structure can be widely applied to a promenade and various facilities.

[Brief description of the drawings]

FIG. 1 is a process flow chart showing a procedure for manufacturing an earth-based pavement of the present invention.

Claims (6)

[Claims] Claims: 1. An asphalt-containing acrylic resin emulsion is mixed with one or more materials selected from masago, sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings. Characteristic soil-based pavement material. 2. An acrylic resin-based emulsion containing asphalt in an amount of 1 to 10% based on the weight of one or more materials selected from masago, sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings. The soil-based pavement material according to claim 1, wherein 3. An asphalt emulsion and an acrylic resin-based emulsion mixed with one or two or more materials selected from masago, sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings. An earth-based pavement material, characterized in that: 4. An earth-based pavement material obtained by mixing one or more materials selected from masago, sandy soil, soil, sand, volcanic ash, incised crushed stone, and screenings with an asphalt-containing acrylic resin emulsion. An earth-based pavement structure characterized by being laid on the roadbed and rolled to finish. 5. An earth-based pavement in which one or more materials selected from a masago, sandy soil, soil, sand, volcanic ash, cut crushed stone, and screenings are mixed with an asphalt emulsion and an acrylic resin emulsion. Soil-based pavement structure characterized by laying the material on the roadbed and finishing by rolling. 6. A binder and water are added to one or two or more materials selected from a masago, sandy soil, soil, sand, volcanic ash, crushed crushed stones, and screenings to obtain an optimum water content value. A method for adjusting an earth-based pavement raw material, characterized by adjusting.