WO2014163216A1

WO2014163216A1 - Method for paving environmentally-friendly road

Info

Publication number: WO2014163216A1
Application number: PCT/KR2013/002709
Authority: WO
Inventors: 이수형; 이태형
Original assignee: Lee Soo-Hyung
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2014-10-09

Abstract

The present invention relates to a method for paving an environmentally-friendly road and, more specifically, to a method for constructing an environmentally-friendly road by forming a soil pavement layer using soil and forming a thin asphalt layer at room temperature on the upper part of the soil pavement layer. The method for paving an environmentally-friendly road, according to the present invention, comprises the steps of: injecting an enzyme liquid into soil, mixing cement and mineral supplements so as to prepare a soil packing material, and mixing the soil packing material with water; laying the soil packing material mixed with water; compacting the laid soil packing material; and paving a thin layer of asphalt at room temperature on the upper part of the soil packing material, wherein the mineral supplements include aluminum sulfate, sodium lignin sulfonic acid, magnesium lignin sulfonic acid, sodium tripolyphosphoric acid, potassium chloride, calcium chloride, magnesium chloride, sodium chloride, calcium carbonate, and ammonia water.

Description

Eco-friendly pavement method

The present invention relates to an environmentally friendly road pavement method, and more particularly, to form an environmentally friendly road by forming a soil pavement layer using soil, and forming a non-heated, room temperature asphalt layer on top of the soil pavement layer. .

In general, road pavement is represented by asphalt or concrete pavement.

However, the asphalt pavement or concrete pavement has inevitably damaged the natural environment in order to produce sand or aggregate, which is the main material, and in developed countries that cannot refine crude oil or produce cement, There were many difficulties in paving the road with concrete.

In order to replace the asphalt or concrete pavement described above, a method using soil is highlighted. The soil-based method has long been used for the purpose of reinforcing soft grounds such as wetlands and insoluble land as a soil cement method.

However, in order to utilize the soil for surface packaging, evenly mixing must be premised. Unlike sand or aggregate, it is not easy to mix homogeneously due to the nature of the soil that absorbs moisture as it contains fine particles. Only certain soils, such as Misato, are used. In addition, due to the increase of the specific surface area, a relatively shortage of solidified materials appears, and the absorbency is so strong that the surface water is contained, the function of the cement is deteriorated by the organic material eluted from various corrosives, there was a problem that the durability and cold resistance is weak.

In order to solidify the soil, it is basically based on the principle of hardening by hydration reaction by adding cement or lime and adding water. Unlike ordinary sand, soil has problems in durability such as strength expression. Eggplants were due to the nature of the soil containing particulates. Therefore, it is necessary to increase the content of solidified materials such as cement, lime, and gypsum in order to help solidify the soil. Conventionally, to lower the content of cement, simply lower the content of cement and increase the content of lime, gypsum, etc. A problem has occurred.

In order to solve the above problems, Korean Patent Publication No. 1986-3321, Domestic Patent Publication 1992-6585, Domestic Patent Publication No. 1998-43021, Domestic Patent Publication No. 1999-014390, Domestic Patent Publication No. 2006-36403 Korean Patent Publication No. 2005-20307 and Korean Registered Patent No. 621963 have been proposed, but all of them contain more than 15% of solidified material such as cement, which can solve the problems of environmental and economical efficiency. There was no.

In addition, the Korean Patent Publication No. 2004-69521 lowered the content of the solidified material to about 8%, but there was a problem in that the utility strength was low due to the low compressive strength of about 75kg / cm 2.

In addition, Korean Patent Publication No. 1996-41319 uses more than 10% of excessive cement, lime, and gypsum to promote the basicization of soil due to the high content of calcium oxide. In addition, Korean Patent Publication No. 2005-32542 proposes a wet method using soil, but when soil is mixed with ready mixed concrete, material separation and strength decrease, and when a lot of water is added to the soil, bleeding during surface treatment There was a problem that the field application is impossible in the pavement using the soil, unless suppressing the generation of the latencies.

Therefore, the inventors of the present invention to solve the problem that the homogeneous mixing is not easy due to the nature of the soil to absorb the moisture of the above problems, Patent No. 10-644245 "Soil cement manufacturing equipped with an impeller equipped with a scraping blade The device was invented to enable uniform mixing of the soil, and by suggesting the "dry ocher soil packaging material and its construction method" of Patent No. 10-0775360 to ensure sufficient durability even if the amount of solidified fire is reduced.

However, even when the dry ocher soil packaging material developed by the present inventors is applied to the surface pavement, there is a limitation in developing the pavement of the main road due to the surface wear and slippage of the soil pavement layer.

Therefore, an object of the present invention is to solve all the problems of the conventional soil paving method, by forming a soil pavement layer using the soil, by forming a thin room temperature asphalt layer on top of the soil pavement layer, the soil It is to provide an environmentally friendly road paving method while eliminating durability, surface abrasion, and surface slippage which are problems of the pavement layer.

In addition, by using the enzyme solution and inorganic additives in the soil pavement, it is possible to significantly reduce the amount of cement while expressing the strength of the soil pavement layer more excellent.

In addition, by spraying the inorganic additive on the upper surface of the soil pavement layer to form room temperature asphalt, so that the soil pavement layer and room temperature asphalt layer has excellent adhesion.

Environmentally friendly road paving method of the present invention for achieving the above object is to prepare a soil pavement material of the soil, cement and inorganic additives, and mixing the water, and to install the soil pavement material mixed with the water, and Compacting the installed soil pavement, and wrapping the room temperature asphalt in a thin layer on top of the soil pavement, the inorganic additive is characterized in that consisting of alkali metal or earth metal.

In addition, the prepared soil packaging material is prepared by mixing the cement and inorganic additives after the enzyme solution to the soil, the enzyme solution is characterized in that it comprises a saccharide, a surfactant and water.

In addition, after the step of compacting the soil packaging material,

Characterized in that it further comprises the step of forming a crack guide line in the compacted soil pavement.

In addition, the crack induction line is characterized in that to form a depth of 1/3 to 2/3 of the total thickness of the compacted soil pavement.

In addition, the thickness of the room temperature asphalt laid in the thin layer is characterized in that 6 ~ 12mm.

In addition, before the step of laying the room temperature asphalt in a thin layer,

Mixing and spraying the inorganic additives with water in the compacted soil packaging material is characterized in that it further comprises.

According to the present invention by paving the road using soil and surface treatment with room temperature asphalt without heating, it improves abrasion resistance of the pavement surface, while having a lifespan comparable to asphalt or concrete, it is 30% or more than conventional road paving. Provides useful effects such as reducing construction costs.

In addition, by replacing asphalt or concrete using sand or aggregate with soil pavement, and by installing room temperature asphalt instead of ordinary asphalt on top of the soil pavement, it can minimize natural damage and contribute greatly to resource replacement effect. It can drastically reduce the generation of carbon dioxide, thereby realizing low carbon green growth, and it can be easily applied in underdeveloped countries such as Africa due to the low construction cost.

In addition, by using enzymatic liquid and inorganic additives in the soil pavement, the amount of cement can be greatly reduced and excellent strength can be expressed, and the air can be shortened by installing room temperature asphalt directly on the soil pavement without curing the soil pavement. .

1 is a process diagram of an environmentally friendly road paving method according to the present invention.

Hereinafter, the present invention will be described in detail.

The eco-friendly road paving method of the present invention is based on the patent registration No. 10-0775360, which is the prior patent of the present inventors, and the basic soil paving method follows the method of the prior patent.

Eco-friendly road paving method of the present invention comprises the step of mixing water in the soil pavement of the soil, cement and inorganic additives (S1), the step of laying the soil pavement mixed with the water (S2), and the paved soil pavement Step (S3) and the step of forming a crack induction line in the compacted soil packaging material (S4), and mixing the inorganic additives and water in the compacted soil packaging material (S5) and the soil It comprises a step (S6) of wrapping the room temperature asphalt in a thin layer on top of the pavement.

First, prepare an earth packaging material containing soil, cement, and inorganic additives, and mix water with the earth packaging material (S1). The soil uses subgrade soil or imported soil. The configuration for the soil packaging material will be described again below.

When the mixing of the soil packaging material and water as described above (S1) is completed, the soil packaging material is laid (S2). The installation thickness is preferably 7 to 20 cm according to the use, and in the case of the installation of 20 cm or more, it is preferable to use the earthen paving crusher which is made at the same time since the compaction is made at the bottom.

The soil pavement material will have the same characteristics as general soil before compaction curing, and the installation of the pavement material does not have a high water content, so the mechanized pavement by Hunisha is ideal for rapid installation to prevent surface drying before compaction. Of course it is also possible.

And when the installation is completed (S2), to compact the soil packaging material (S3). The compaction method is completely distracted during the mixing process, so if pressure is applied to the Laura without weight reduction, cracks are formed laterally in the forward direction of the Laura, so as to reduce the optimum of the installed packaging material. It is desirable to reduce the optimum by utilizing the function of tempering and vibration, to make a first compaction with a small roller, then complete the compaction with a tire roller, and finish with a compaction to eliminate tire marks with the final step. The number of compaction may be adjusted according to the final water content in the nature of the soil, so that the compaction to the extent that the water does not rise due to excessive compaction.

When the compaction is completed (S3), a crack induction line is formed on the compacted soil pavement (S4). The present invention is to form a crack induction wire to cope with dry shrinkage due to curing by maintaining the durability of high strength.

The crack guide line is formed by cutting along the width direction of the road to a depth of 1/3 to 2/3 of the total thickness of the compacted soil pavement.

After forming the crack induction line (S4), in order to increase the adhesion between the compacted soil pavement and room temperature asphalt to be installed on the top, by mixing the mineral additives used in the soil pavement prior to the compacted soil pavement with water Injection (S5). At this time, the mixing ratio of the inorganic additive and water is not limited, but the ratio is preferably 1:50 to 200, and the spraying amount is not limited, but the inorganic additive (before mixing with water) is about 1 to 10g per 1㎡. This is preferred.

When spraying the acidic room temperature asphalt on the soil pavement as it is without spraying the inorganic additive (S5), the normal temperature asphalt is not easily penetrated into the soil pavement, and the room temperature asphalt is attached only to the surface of the soil pavement, thereby frequently passing traffic. Peeling of the packaging may occur. In order to prevent this by spraying inorganic additives on the surface of the soil pavement layer to acidify the surface of the soil pavement, even at room temperature asphalt will be able to maintain a strong adhesive state like ordinary asphalt or concrete.

When the spraying of the inorganic additive (S5) is completed, the room temperature asphalt is paved in a thin layer on the top of the soil pavement (S6). Here, the room temperature asphalt refers to a method of emulsifying the asphalt to mix the modifier material and to harden by evaporating moisture at room temperature. The room temperature asphalt is a mixture of aggregate and stone powder having a particle size of 6 to 8 mm at room temperature asphalt Since the mixture does not denature or fall off even when mixed with, the aggregate, stone powder, etc. are mixed as needed to be constructed with room temperature asphalt concrete. The mixing ratio of the room temperature asphalt concrete is in accordance with the conventional mixing ratio.

In the present invention, the type of room temperature asphalt is not limited, and any known material may be used as long as it is known in the art.

In addition, the thickness of the room temperature asphalt paved with the thin layer is preferably 6 ~ 16mm bar, if the thickness is less than 6mm is too thin to reduce the effect of the surface treatment, if it exceeds 16mm excess room temperature asphalt takes environmentally friendly This is because it is against the purpose of pavement.

Here, the conventional soil paving method was required to cover with vinyl and prevent moisture evaporation for a certain time, that is, curing in order to prevent moisture evaporation, in the present invention, after laying and compacting the soil pavement, without a separate curing process as it is a thin layer By paving asphalt at room temperature, it is possible to shorten the air.

When the paving of the room temperature asphalt is completed, after three days of curing, the road is opened, and the road is completed for 28 days by blocking the passage of heavy vehicles.

Hereinafter, the soil packaging material according to the present invention will be described. The apparatus used for the manufacture of the soil pavement described below preferably uses the "apparatus for producing a cement cement equipped with an impeller with a scraping blade" of the inventor's pre-registered patent No. 10-644245. It is not necessarily limited to the premise of homogeneity.

In the preparation of the soil packaging material, first, the soil and cement are ground and mixed. This is because the soil containing fine particles absorbs water and is agglomerated, so if water is added to the initial stage, evenly crushing and mixing does not cause overloading of the equipment. It will be committed.

When the premature mixing of the soil and cement is completed, the inorganic additive is added thereto in the form of an aqueous solution. The inorganic additive aqueous solution is not limited to the concentration, it is designed to match the injection amount of the pump to the proportion of cement. The reason for making the inorganic additive in an aqueous solution state is that mixing is not easy in mixing a small amount of additives in a large amount of soil to make it evenly mixed by making an aqueous solution and increasing its volume. When the inorganic additive aqueous solution is added and mixing is completed, water is added and mixed in the final step, but when the inorganic additive and water are mixed and mixed with the mixture of soil and cement, the pupil phenomenon due to the high speed rotation does not occur. Mixing should be carried out at high speed in the range of RPM 150 ~ 200, and the aqueous solution of mineral additives or the administration of water should be supplied by high pressure injection, not water stream.

In this case, the amount of the water is determined according to the water content of the soil, and it is sufficient that the aqueous solution and the water are added to finally hold together the soil by hand. That is, instead of manufacturing a wet packaging material as in the related art, packaging is possible with a minimum amount of water, and an amount of water is properly adjusted according to an optimum function ratio.

Since the optimum function ratio is known to all those skilled in the art, detailed description thereof will be omitted.

At this time, the soil is not limited to the kind, it is preferable to use the soil passed through the 20mm sieve.

In addition, the cement is used as a solidified material, but can be used both single cement and mixed cement, most preferably use a general portland cement that can be easily purchased and used in the vicinity.

In addition, the inorganic additive serves to maximize the performance of the cement by improving the soil, by maximizing the performance of the cement so that the sufficient strength can be expressed even if the content of the cement to 10% by weight or less. The inorganic additive lowers the charge of the adsorbed water by lowering the charge of the adsorbed water due to ion exchange of humic proton dissolved in metal ions such as sodium lignin sulfonate, magnesium lignin sulfonate, aluminum sulfate, and adsorbed water that is strongly charged to soil particles. It is hydrophobic, and soil is rapidly becoming granulated, and soil quality is improved by sanding of clay.

The inorganic additive is composed of an alkali metal or an earth metal, more preferably 4 to 6% by weight of aluminum sulfate, 4 to 6% by weight of sodium lignin sulfonate, 7 to 9% by weight of lignin sulfonate, and 0.5 to 2% by weight of sodium triphosphate %, 18-23 wt% potassium chloride, 10-13 wt% calcium chloride, 21-28 wt% magnesium chloride, 27-35 wt% sodium chloride, 0.01-0.06 wt% calcium carbonate and 0.3-0.6 wt% aqueous ammonia at 3% concentration Including, the inorganic additive is well known in the Patent No. 10-0775360 invented by the applicant, the detailed description thereof will be omitted.

Here, the mixing ratio of the soil, cement and inorganic additives is preferably 89.5 to 98.45% by weight of soil, 1.5 to 10% by weight of cement and 0.05 to 0.5% by weight of inorganic additives, but is not necessarily limited thereto.

On the other hand, it is possible to use the enzyme solution in the soil in order to reduce the amount of cement used in the high price of industrial products such as Africa, or to express more excellent strength. The enzyme solution may contribute to the improvement of the strength of the soil pavement by aligning the incorrect arrangement of soil particles by generating moisture balance and moisturizing effect between the soil particles, and reducing the voids between the soil particles through the arrangement. If the enzyme solution is used in the soil, it can save more than 20% of solidified fire, which brings about 10% strength enhancement effect.

The enzyme solution is used to mix water and oil saccharides, surfactants lubricating between the soil particles, and water in a weight ratio of 2: 4: 4, the amount is based on 100 parts by weight of the soil It is added in the range of 0.01 to 10 parts by weight, and the cement and mineral additives are mixed in the soil into which the enzyme solution is added. In the present invention, the type of the surfactant is not limited, and all conventionally known soil surfactants may be used.

As described above, the present invention has a problem of forming an auxiliary base layer on a roadbed and packing ascons of several layers such as a base layer (thickness about 30 cm), an intermediate layer (thickness about 7.5 cm), and a surface layer (thickness about 5 cm). Due to the large amount of aggregate and sand is required, the natural environment is damaged, and due to the nature of the asphalt, high temperature heating is required at 180 ° C., thus preventing the inevitable generation of carbon dioxide and solving the problem of high cost.

That is, the present invention solidifies the soil of the subgrade or imported soil to form a soil pavement layer (thickness 10 ~ 20cm) without a separate auxiliary layer, and surface treatment with room temperature asphalt (thickness 6 ~ 16mm) without applying heat By improving the abrasion resistance of the pavement, it can have a lifespan comparable to asphalt or concrete without compromising the natural environment, can dramatically reduce the amount of carbon dioxide generated, and can save 30% more construction cost than the existing pavement. Will be.

The present invention will be described in detail through the following examples.

Example 1

First, the enzyme solution prepared by mixing 400 g of saccharide 200 g and 400 g of water was added to 100 kg of soil. And a test specimen was prepared by mixing 10 kg of cement and 0.5 kg of an inorganic additive. The inorganic additives include aluminum sulfate 50g, sodium lignin sulfonate 50g, magnesium lignin sulfonate 70g, sodium tripolyphosphate 10g, potassium chloride 180g, calcium chloride 110g, magnesium chloride 230g, sodium chloride 290g, calcium carbonate 0.5g and 5g ammonia water 5g. Used by mixing. (Respon 3 (Product Name) was used as the surfactant.)

Example 2

A test specimen was prepared by mixing 10 kg of cement and 0.5 kg of an inorganic additive to 100 kg of soil. The inorganic additive was used in the same manner as in Example 1.

(Comparative Example)

A test specimen was prepared by mixing 10 kg of cement with 100 kg of soil.

After the wet state of the test specimen measured the compressive strength (28 days) and the results are shown in Table 1 below.

Table 1

Press strength measurement result

division	Measurement result	Test Methods
Example 1	21.6	KS F4004: 2008
Example 2	19.2
Comparative example	13.34

As can be seen in Table 1, it was confirmed that Example 1 shows a higher strength than Example 2 compared to Example 2 compared to the comparative example.

Although the present invention has been described above with reference to the above embodiments, the present invention is not limited by the above embodiments, and various modifications can be made without departing from the scope and spirit of the present invention.

The present invention is to solve the problems of the conventional soil paving method, by forming a soil pavement layer using the soil, by forming a thin room temperature asphalt layer on top of the soil pavement layer, soil pavement layer It can be used industrially because it can provide an environmentally friendly road paving method while eliminating the problems of durability, surface abrasion, surface slippage, and the like.

Claims

Preparing an earth packaging material consisting of soil, cement, and mineral additives, and mixing water with the soil packaging material (S1);

Laying the soil packaging material mixed with water (S2),

Step (S3) and the compacted soil packaging material,

It includes a step (S6) of paving the room temperature asphalt in a thin layer on top of the soil packaging material,

The inorganic additive is an environmentally friendly road paving method, characterized in that the alkali metal or earth metal.
The method of claim 1,

The prepared soil packaging material,

After the enzyme solution is added to the soil, it is prepared by mixing cement and inorganic additives,

The enzyme solution is an environmentally friendly road pavement method comprising a saccharide, a surfactant and water.
The method of claim 1,

After the step of compacting the soil packaging material (S3),

Eco-friendly road paving method, characterized in that it further comprises the step (S4) of forming a crack induction line on the compacted soil pavement.
The method of claim 3, wherein

The crack induction line is characterized in that to form a depth of 1/3 to 2/3 of the total thickness of the compacted soil pavement Eco-friendly pavement method.
The method of claim 1,

Environmentally friendly road paving method, characterized in that the thickness of the room temperature asphalt paved with a thin layer is 6 ~ 16mm.
The method according to any one of claims 1 to 5,

Before the step of paving the room temperature asphalt in a thin layer (S6),

Eco-friendly road pavement method characterized in that it further comprises the step (S5) of mixing the inorganic additives with water in the compacted soil pavement.