JPH09296406A - Earth-paving agent and earth pavement and dust proofing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a costless pavement appropriate for the natural enviromment, by mixing a roadbed with an aqueous polymer emulsified and polymerized with an acrylic acid ester and agitating and compacting them, when executing a simple and easy pavement of exposed soil. SOLUTION: When executing such a simple and easy pavement that a muddy place in a rain in an exposed soil at a garden, a parking lot, a cycling road, etc., is prevented, after the ground surface has been turned over to a specified depth, a specified volume of aqueous polymer emulsion polymerized with an acrylic acid ester is scattered, mixed and agitated. In this case, cement may be scattered or a ceramic powder is mixed therewith. Then, the earth-paving materials scattered and mixed on a roadbed are compacted by a vibrating roller or the like. And the water in the inside evaporates and penetrates and the plastic particles coagulate and hence, soil particles bind to form a netted state and form a water-resistant soil. In this way, a natural pavement appropriate for the environment can be executed in a short time and at a low cost.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an earth paving agent, an earth paving method, and a dustproof method for paving a natural environment as it is.

[0002]

2. Description of the Related Art Currently, concrete pavement, asphalt pavement, and soil pavement using asphalt emulsion are used as pavement work. However, concrete pavement takes a long time to construct, the construction cost is high, and the paved surface feels hard and cold. Also, asphalt pavement can be easily paved, but there is an image that the pavement surface is black and it is hot, and there is a problem that the road surface is deformed due to softening in the summer when the temperature is high.

In addition to the pavement in which the surface of the roadbed is completely covered with a strong pavement material such as concrete pavement or asphalt pavement, walking in a soil garden, parking lot, cycling road, etc. with the soil exposed. There is an increasing demand for paving as easily as vehicles and vehicles can pass. As this soil pavement method, there is also a pavement method in which asphalt emulsion is sprayed on the roadbed, but this is not the original soil color, but there is a blackness like oil and there is a problem that collapse due to frost heave occurs. There is also a method of spraying and mixing a vinyl acetate-based emulsion, but this has a drawback that it is easily broken by wind and rain due to its low water resistance and its durability is poor.

Further, as a dustproof work, conventionally, there is a surface treatment method by spraying magnesium chloride (nigari) or calcium chloride. However, these are short-lived effects because they run off due to rainfall, and there is a problem that the surrounding plants are affected by the scattering of chloride.

[0005]

DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned drawbacks, and paves the natural environment as it is to maintain the soft feel of the soil, harmonize with the surrounding landscape, and allow walking and vehicle passage. The present invention provides a soil-polluting agent, a soil pavement method, and a dust-proof method that are strong, have water resistance and durability, and can be constructed in a short period of time and at low cost.

[0006]

The soil paving agent according to the first aspect of the present invention is characterized by containing an aqueous polymer emulsion obtained by emulsion polymerization of an acrylic ester as a main component. The soil pavement method according to claim 2 is characterized in that an aqueous polymer emulsion obtained by emulsion polymerization of acrylic acid ester is mixed with a field roadbed cultivated to a construction thickness, stirred, and then pressure is applied to the roadbed to compact it. To do.

In the soil pavement method according to the third aspect of the present invention, an aqueous polymer emulsion obtained by emulsion polymerization of acrylic acid ester is mixed with a field roadbed cultivated to a construction thickness and stirred,
The method is characterized in that cement is sprinkled, further mixed and stirred, and then pressure is applied to the roadbed to compact it.
In addition, the soil paving method according to claim 4, the ceramic powder,
This is characterized in that an aqueous polymer emulsion obtained by emulsion-polymerizing an acrylic ester is mixed, the mixture is laid on a local roadbed to a predetermined thickness, and then the roadbed is compacted by applying pressure. Further, the dustproof method according to claim 5 is characterized in that an aqueous polymer emulsion obtained by emulsion-polymerizing an acrylic ester is sprayed on the on-site roadbed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The earth paving agent of the present invention is mainly composed of an aqueous polymer emulsion obtained by emulsion polymerization of acrylic acid ester. This acrylic polymer emulsion is a plastic dispersion prepared by dispersing fine particles of synthetic resin in water. When it is sprayed on the ground surface with a liquid, water is lost by evaporation and permeation, and the plastic particles agglomerate to bind the soil particles in a net shape to form a water resistant soil.

Next, a method of paving with the soil paving agent of the present invention will be described. First, the soil on the surface of the site is cultivated to soften the soil and remove impurities. The plowing depth is usually 3 to 5 cm, which is the thickness of the created roadbed. The thickness of the roadbed to be prepared is determined by taking into consideration the ground bearing capacity of the local roadbed and the weight of the vehicle that is passing. The soil paving agent of the present invention evaporates water and solidifies it, so that the roadbed is free from running water or spring water.

As the soil to be paved, the particle size is 0.074.
Soil such as sandy soil and silty soil containing 30% or more of silt and clay of 30 mm or less is preferable. The rest on this soil
Fine sand, if contained in a range of less than 70%,
It is sufficient if the ground is such that coarse sand, fine gravel, medium gravel with a grain size of about 18 mm, etc. are moderately distributed. If the soil is not suitable for construction, a good quality soil should be brought in from the vicinity and adjusted.

A soil pavement containing the acrylic polymer emulsion of the present invention as a main component is sprinkled on the surface of the earth, the surface of which is softened by plowing. This application rate varies depending soil or soil amount, 0.5 to 3.0 liters relative to 1 m ^2,
It is preferably about 1.0 to 2.0 liters. in this case,
If the spray amount is less than 0.5 liters, it is difficult to obtain sufficient solid-particle bonding, and if it is used over 3.0 liters, the roadbed may crack due to shrinkage due to drying, and the effect is not recognized and it is uneconomical. is there. In addition, a small amount of water may be added and sprayed depending on the dry condition of the soil.

Immediately after spraying, the soil is stirred. This stirring is preferably carried out by mixing with a tractor or the like in order to make the aggregate of the soil uniform. In the case of agitation by a tractor, it is preferable to mix three times at one place.

Further, it is preferable to spray and mix cement as a hardening accelerator here. By mixing the cement, the water content in the acrylic polymer emulsion is absorbed, and solid particle bonding of the polymer is promoted. The mixing ratio of this cement is 0.1 to 0.6 Kg per 1 m ² .
And preferably mixed at about 0.3 kg. In this case, if the cement content is less than 0.1 Kg, the effect of the addition is small, and if the cement content is more than 0.6 Kg, slag is floated on the surface of the roadbed or mint occurs and the natural color of the soil is diminished.

As described above, the soil paving agent and, if necessary, the cement are sprayed, mixed with the soil and stirred, and then the soil is leveled and the land is leveled immediately. In this method, pressure is applied to the roadbed to compact it, and further vibration is used to accelerate the curing, and a strong roadbed can be formed. As a method of applying pressure to the roadbed, a method capable of compacting substantially uniformly such as rolling by a roller is used.

The pressure for compaction is set to 5 kgf / cm ² or more and may be appropriately selected according to the condition of the ground and the way of finishing the roadbed. If it is less than 5 Kgf / cm ² , the bonding area between soil particles may be reduced and the strength may be insufficient. Further, it is more preferable to perform compaction by vibration with a vibrating roller or the like, and it is preferable to perform compaction by vibration about 1 to 3 times. Note that it is preferable that the rolling compaction of the finish is vibration-free.

With the above-mentioned compaction, the work is completed during the period when the soil particles are not dried. Subgrade curing should be natural release, non-vibrating, and non-hydrating. The curing period is
Although it depends on various conditions such as the dry condition of soil, the thickness of roadbed, and the climate, about 1 to 10 days is sufficient.

Next, a method of spraying a mixture of ceramic powder and an acrylic polymer emulsion and paving the soil will be described. As the ceramic powder, for example, crushed roof tiles or bricks of dismantled houses that are landfilled as industrial waste are used. An acrylic polymer emulsion is mixed with this ceramic powder. Regarding the mixing ratio, about 20 to 100 liters of acrylic polymer emulsion is mixed with 1 m ^{3 of} ceramic powder, and about 20 to 200 liters of water is mixed for dilution and the mixture is stirred. In this case, if the polymer emulsion is less than 20 liters, sufficient solid particle bonding cannot be obtained, and if it is used in excess of 100 liters, the effect is not improved.

In this way, the ceramic powder mixed with the acrylic polymer emulsion should be prevented from evaporating water,
Put in a plastic bag and pack. Regarding storage, avoid direct sunlight and store at room temperature. In this way, it is mixed and stored in the factory in advance and transported to the pavement site,
After laying it on the soil to a thickness of 3 to 5 cm, compact it by vibration with a vibrating roller or the like, and finish rolling without vibration. In this method, the roof tiles and bricks can be crushed and mixed in advance with the acrylic polymer emulsion at the factory, so the construction period can be shortened,
Brick-like paving can be performed. Furthermore, it is possible to effectively use roof tiles, bricks, etc., which have been landfilled as industrial waste until now.

Next, the dustproof work using an acrylic polymer emulsion will be described. First, the acrylic ester is diluted. Water is used as a diluent, and the emulsion is diluted about 2 to 50 times. If it is less than 2 times, tackiness remains after drying, and if it exceeds 50 times, it becomes impossible to form a water resistant soil layer. Spray the diluted acrylic polymer emulsion on the ground. The amount of spray varies depending on the soil type and soil volume, but normally 0.5 to 5 per 1 m ² .
It is about 0 liter, preferably about 1.0 to 4.0 liters. If the application amount is less than 0.5 liters, sufficient solid-particle bonding cannot be obtained, and if the application amount is more than 5.0 liters, the effect will not be observed and the effect will not be improved.
It is uneconomical and not preferable. Further, if dusting is performed after spraying, the dustproof effect can be enhanced.

The acrylic polymer emulsion is a plastic dispersion liquid in which fine particles of a synthetic resin are dispersed in water. When this is dispersed on the ground surface, water is lost by evaporation and permeation, and the plastic particles aggregate to cause soil particles. It can be combined in a mesh to form a water resistant soil and can prevent dust from scattering.

[0021]

【Example】

(Example 1) The garden edge of the land that was built a dozen years ago is paved. Pavement thickness of about 100 m ² of local soil with a tractor 5
Plow the entire surface with a depth of cm. Aqueous polymer emulsion obtained by emulsion polymerization of acrylic acid ester is diluted (120 liters of polymer and 60 liters of water for dilution are mixed). 180 liters of this pre-diluted polymer is evenly distributed with a watering can. Immediately thereafter, the above tractor is used to stir and mix. After mixing once, 30 kg of Portland cement is sprinkled and then stirred and mixed twice more. After that, the ground is leveled by a rake, the primary rolling is performed by a hand roller (600 Kg), and after the rolling, the unleveled land is rectified. Next, the roller was vibrated to apply the secondary rolling pressure twice. Then, it was compacted without vibration as a finishing third rolling compaction.

As a result, the pavement using the acrylic water-based polymer emulsion requires a working time of 2 hours and is cured (dried).
It could be constructed within a period of 2 days, and the nature-like soil pavement did not change even when a passenger car drove, and no collapse was observed even after 6 months.

(Example 2) The bricks of a dismantled house were crushed, 40 liters of acrylic polymer emulsion was mixed with 1 m ^{3 of} brick powder, and 100 parts of water was used for dilution.
Mix 1 liter and stir. Brick powder mixed with the acrylic polymer emulsion is put in a plastic bag, packed, and stored in the factory. This was transported to the pavement site, spread on a 300 m ² ground to a thickness of 3 cm, then compacted with a vibrating roller, and rolling was performed without vibration. This soil pavement method requires 4 hours of working time and can be applied in a curing (drying) period of 2 days. It allows for brick-like heavy pavement and has excellent drainage properties, and collapse is observed even after 1 year. There wasn't.

(Example 3) A mixture of 90 liters of an acrylic aqueous polymer emulsion and 1710 liters of water was sprayed on a temporary parking lot of 30,000 m ² of grain-crushed stones with a sprinkler. After spraying, dust was applied by rolling the ground with a macadam roller. After drying, fixing of crushed stones can also be seen,
The amount of scattered dust is reduced. It was confirmed that even after 6 months, it had a dustproof effect and suppressed germination of weeds.

[0025]

As described above, according to the soil pavement agent, the soil pavement method and the dustproof method according to the present invention, when an aqueous polymer emulsion obtained by emulsion-polymerizing an acrylic ester is sprayed on the ground surface, water is lost by evaporation and permeation. The aggregated plastic particles allow the soil particles to be bonded in a net-like manner to form a water resistant soil. For this reason, you can pave a natural and excellent landscape without affecting the environment.
Moreover, it is possible to shorten the construction period and reduce the cost.
In addition, a product obtained by spraying ceramic powder in which an acrylic water-based polymer emulsion is preliminarily mixed and then rolling the pavement has a heavy feeling and can be paved with excellent drainage property, so that the industrial waste can be effectively used. Further, the dustproof method of spraying the acrylic water-based polymer emulsion is easy to construct and can be useful for environmental protection.

Claims (5)

[Claims] 1. A soil paving agent comprising an aqueous polymer emulsion obtained by emulsion-polymerizing an acrylic ester as a main component. 2. A method for soil paving, which comprises mixing an aqueous polymer emulsion obtained by emulsion polymerization of an acrylic ester with a field roadbed cultivated to a construction thickness, stirring the mixture, and then applying pressure to the roadbed to compact it. 3. A water-based polymer emulsion obtained by emulsion-polymerizing an acrylic ester is mixed with a field roadbed cultivated to a construction thickness, stirred, and then sprayed with cement, and further mixed,
An earth paving method characterized by stirring and then compacting by applying pressure to the roadbed. 4. A ceramic powder is mixed with an aqueous polymer emulsion obtained by emulsion polymerization of acrylic acid ester, and the mixture is spread on a roadbed to a predetermined thickness, and then the roadbed is compacted by applying pressure. How to pave. 5. A dustproof method comprising spraying an aqueous polymer emulsion obtained by emulsion polymerization of an acrylic ester on a local roadbed.