KR20110105121A - Conductive plastic drain board and preparation method thereof - Google Patents

Abstract

The present invention relates to a conductive drainage material and a method for manufacturing the same, comprising a conductive material in a soft ground improvement drainage material including a core material and a filter material.

Description

Conductive drainage and its manufacturing method {Conductive Plastic Drain Board And Preparation Method Thereof}

The present invention relates to a conductive drainage material comprising a conductive material and a method of manufacturing the same.

If roads, bridges, buildings, etc. are constructed on ground composed of soft viscous or organic soils, the amount of settlement will be excessive and lack of support will cause safety problems. In order to carry out civil engineering work or building work on such soft ground, it is necessary to first perform soft ground improvement construction to make the ground solid.

Such a soft ground improvement method includes a substitution method for removing part or all of the soft layer and replacing it with high-quality earth and sand, a linear method for accelerating consolidation by loading (filling) a load higher than the design load in advance, and at appropriate intervals in the ground. Vertical drainage method to promote consolidation by shortening horizontal drainage distance by installing vertical drainage, chemical injection method to inject coagulant into the ground and solidify it, and electropenetration method to discharge gap water in ground by using electric potential difference Etc. are used.

Among the soft ground improvement methods as described above, the vertical drainage method is installed on the soft ground at an appropriate interval to shorten the horizontal drainage distance and to apply the vertical drainage method to promote consolidation. The vertical drainage method includes a plastic board drain method, a sand compaction pile method, a pack drain method, and the like. The most widely applied method is a plastic board drain method.

In detail, the plastic board drain method will be described in detail. First, a permeable mat and a sand drainage layer are installed on the soft ground. Subsequently, the drainage material is inserted vertically at a predetermined interval (1 to 2 m) into the soft ground through the permeable mat and the sand drainage layer. Moisture in the soft ground is discharged to the sand drainage layer along the core material of the drainage due to the capillary phenomenon, and the strength of the ground increases due to the settlement of the ground.

On the other hand, the electroosmotic drainage method will be described in detail, first install a permeable mat and a sand drainage layer on the soft ground. A sand column is formed in the soft ground, a negative electrode rod is installed inside, and a positive electrode rod is installed at a predetermined interval around. Power is supplied to the electrode, which causes the gap water to move from the positive side to the negative side to be discharged to the top, and the ground becomes hard due to the subsidence of the ground.

However, in the improved construction of the soft ground, a lot of time and cost will be generated. In particular, the improvement period of the submerged section of the soft ground by using the conventional vertical drainage method is spent more than six months. Therefore, the art is studying how to save time and money.

It is an object of the present invention to provide a conductive drain that can apply both the inherent drainage capacity and the drainage capacity of the electroosmotic drainage method.

In addition, an object of the present invention is to provide a conductive drainage material that can be applied to the method that can be early drainage and early settling to reduce time and cost.

In addition, an object of the present invention is to provide a conductive drainage material that can be poured by a general construction method.

The present invention provides a method for producing a soft ground improvement drainage material comprising a core material and a filter material, wherein the conductive material is formed on one or two surfaces or insides selected from the core material and the filter material. It provides a manufacturing method.

The present invention relates to a method for producing a soft ground improvement drainage material comprising a core material, a filter material and a member, wherein the conductive material is selected from the group consisting of a core material, a filter material and a member on one or two or more surfaces or interiors thereof. It provides a method for producing a conductive drainage, characterized in that forming.

The present invention provides a conductive drainage material comprising a conductive material in a soft ground improvement drainage material comprising a core material and a filter material.

The present invention provides a conductive drainage material comprising a conductive material in a soft ground improvement drainage material including a core material, a filter material, and a member.

Conductive drainage according to the present invention can be applied to both the drainage capacity of the intrinsic function and drainage of the electroosmotic drainage method. By using the conductive drainage material according to the present invention, it is possible to apply a method that enables early drainage and early settling to reduce time and cost. In addition, the conductive drainage material according to the present invention can be poured by a general construction method. In addition, the conductive drainage material of the present invention can be applied to the improved method in the soft ground of the buried composition zone, such as lakes, swamps, coasts.

1 is an exemplary view of a conductive drain material according to an embodiment of the present invention.
Figure 2 is an illustration of a conductive drain material according to another embodiment of the present invention.
3 is a view showing an example of performing a vertical drainage method using a conductive drainage material according to an embodiment of the present invention.
4 is a graph comparing the settling amounts of Comparative Examples and Examples 1 to 5.
5 is a graph comparing water content of Comparative Examples and Examples 1 to 5. FIG.
Figure 6 is a graph comparing the amount of consolidation drainage of Comparative Examples, Examples 1 to 5.
7 is a graph comparing the shear strength of Comparative Examples, Examples 1 to 5.
8 is a graph comparing the settling amount with increasing voltage when the conductive drainage material of Example 5 is used.
9 is a graph comparing water content according to an increase in voltage when the conductive drainage material of Example 5 is used.
10 is a graph comparing the amount of consolidation drainage with increasing voltage when the conductive drainage material of Example 5 is used.
11 is a graph comparing the shear strength according to the increase of the voltage when the conductive drainage material of Example 5 is used.

The present invention provides a method for producing a soft ground improvement drainage material comprising a core material and a filter material, wherein the conductive material is formed on one or two surfaces or insides selected from the core material and the filter material. It provides a manufacturing method.

The present invention relates to a method for producing a soft ground improvement drainage material comprising a core material, a filter material and a member, wherein the conductive material is selected from the group consisting of a core material, a filter material and a member on one or two or more surfaces or interiors thereof. It provides a method for producing a conductive drainage, characterized in that forming.

The present invention provides a conductive drainage material comprising a conductive material in a soft ground improvement drainage material comprising a core material and a filter material.

The present invention provides a conductive drainage material comprising a conductive material in a soft ground improvement drainage material including a core material, a filter material, and a member.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

1 is an exemplary view of a conductive drain material according to an embodiment of the present invention.

1, the conductive drainage material according to an embodiment of the present invention is a conductive ground material for improving the soft ground, including a core material 10 and the filter material 11, the core material 10 and the filter material ( 11) includes a conductive material on the surface or inside one or two selected from.

Due to the conductive material, when the conductive drain in accordance with an embodiment of the present invention is buried vertically in the soft ground, it is possible to energize the positive and negative voltage. For this reason, the electroosmotic drainage method in which the pore water (also called pore water) is dehydrated to the cathode can be implemented. When the electroosmotic drainage method is implemented, it is possible to premature drainage and early settlement of the soft ground, saving time and cost during construction. That is, when the conductive drainage material according to an embodiment of the present invention is used, the drainage capacity is increased by the electroosmotic drainage method to the drainage capacity, which is an inherent characteristic of the drainage material, so that the drainage effect is excellent.

The shape of the core material 10 included in the conductive drainage material of the present invention is not particularly limited as long as it does not affect the drainage capacity and filtration, but may be harmonica type, irregularities, filament type or X type.

The base material of the core material 10 is not particularly limited as long as the material is high in strength, workability, flexibility and durability, but is one or two or more selected from the group consisting of polyethylene, polyethylene terephthalate, polypropylene and polystyrene. It is preferable that it consists of.

The filter material 11 included in the conductive drainage material of the present invention is not particularly limited as long as it does not affect water permeability and filtration, but may be in the form of a nonwoven fabric or a web.

The base material of the filter material 11 is not particularly limited as long as the tensile strength is high and does not affect the permeability and filtration, but is selected from the group consisting of polyester, polyethylene, polyethylene terephthalate, polystyrene, nylon and viscose rayon. It is preferable to consist of species or 2 or more types.

The conductive material preferably includes one or two or more selected from the group consisting of conductive polymers, conductive carbons, conductive ions, metals and conductive fillers.

The conductive polymer is preferably a π-conjugated conductive polymer. The π-conjugated conductive polymer is polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), poly (3,4-ethylenedioxythiophene), polyethylenedioxythiophene, polystyrenesulfonate, polyacetylene , Polyphenylacetylene, poly (p-phenylene), poly (m-phenylene), poly (p-phenylenevinylene), poly ((2,5-dialkoxy) p-phenylenevinylene), poly It is preferable that it is 1 type (s) or 2 or more types chosen from the group which consists of (p-vinylene sulfide), polyisocyanaphthalene, and polyheptadiene.

The conductive carbon is preferably one or two or more selected from the group consisting of Ketjen black, acetylene black, carbon nanotubes, carbon fibers and graphite.

The conductive ion is preferably one or two or more selected from the group consisting of tetraethylammonium, tetrabutylammonium, octadecyltrimethylammonium, trimethylammonium and perchlorate.

The metal is selected from the group consisting of gold, silver, copper, nickel, copper, zinc, ITO, aluminum, titanium, chromium, lithium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium and radium. It is preferable that it is 1 type, or 2 or more types.

The conductive filler is preferably one or two or more selected from the group consisting of tin oxide, zinc oxide, titanium oxide and aluminum oxide.

The conductive material included in the conductive drainage material according to the present invention may be included on the surface or inside of one or two of the core material 10 and the filter material 11.

If the conductive material is included in one or both surfaces of the core material 10 and the filter material 11, it may be formed by a coating method, a vacuum deposition method or a plating method.

If the conductive material is formed by the coating method, it is preferable that the conductive material uses a conductive composition or dispersion containing the conductive material.

The conductive composition preferably comprises 55 to 75% by weight of the conductive polymer, 10 to 15% by weight of the binder, 1 to 5% by weight of the dispersant, and the balance of the solvent.

Since the conductive polymer has been described above, it is omitted.

As the binder, it is preferable to use one or two or more selected from the group consisting of urethane resins, epoxy resins, acrylic resins and alkyd resins.

The dispersant is not particularly limited as long as it is used in the art, but a surfactant or stearic acid may be used. Anionic surfactant, cationic surfactant, or nonionic surfactant can be used as the surfactant. Examples of the anionic surfactants include alkanesulfonates, alkylbenzene sulfonates, α-olefin sulfonates, alkyl sulfate ester salts, alkyl ether sulfate ester salts, and the like. Examples of the cationic surfactants include amine salts, quaternary ammonium salts, and phosphonium salts. Polyethyleneglycol compounds are mentioned as said nonionic surfactant.

The solvent is not particularly limited as long as it is used in the art, but water, an organic solvent or a mixture thereof may be used. The water may use deionized water. The organic solvent is dimethyl soloxide, dimethylformamide, N-methyl-2-pyrrolidone, 2-butanone, 4-methyl-2-pentanone, methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol 1 or 2 or more types selected from the group consisting of t-butyl alcohol, benzyl alcohol and ethylene glycol can be used.

The dispersion may be used one or two or more selected from the group consisting of carbon nanotube dispersions, Ketjenblack dispersions and carbon fiber dispersions, which are dispersions containing conductive carbon.

The coating method is not particularly limited as long as it is a method used in the art, but the bar coating method, the comma coating method, the knife coating method, the die coating method, the spin coating method, the screen printing method, the gravure printing method, the flexographic printing method, One or two or more methods selected from the group consisting of a pad printing method and an inkjet printing method can be used.

If the conductive material is formed by vacuum deposition, it is preferable to use the conductive metal, and among the vacuum deposition methods, it can be used by chemical vapor deposition, physical vapor deposition or sputtering.

If the conductive material is formed by a plating method, it is preferable to use the conductive metal, and electroplating or electroless plating may be used among the plating methods.

If the conductive material is included in at least one of the core material 10 and the filter material 11, it may be added in the manufacturing process of the core material 10 and the filter material 11.

The conductive material is preferably included in 5 to 20% by weight based on the total weight of the base material or the base material of the filter material and the conductive material.

The conductive material may use all of the above materials, but it is more preferable to use one or two or more selected from the group consisting of the metal, the conductive carbon and the conductive filler.

Figure 2 is an illustration of a conductive drain material according to another embodiment of the present invention.

2, the conductive drainage material according to another embodiment of the present invention includes a core material 10, a filter material 11, and a member 12, and the core material 10 and the filter material 11. And one or two or more kinds selected from the group consisting of the members 12 include a conductive material.

The member 12 is to assist the role of the filter material 11, the material of the member 12 is not particularly limited as long as it is used in the art, polyethylene, polyethylene terephthalate, polypropylene and polystyrene One or two or more selected from the group consisting of can be used.

The type and formation method of the conductive material are the same as the conductive drainage material according to the embodiment of the present invention described above and will be omitted.

The vertical drainage method using the conductive drainage material according to an embodiment of the present invention will be described below. But it is not limited thereto.

3 is a view showing an example of performing a vertical drainage method using a conductive drainage material according to an embodiment of the present invention.

Referring to FIG. 3, a water permeable mat 3 is installed on the soft ground 4, and a sand drainage layer 2 is formed on the water permeable mat 3. The soft ground 4 is preferably to chop the top so that the surface is even. The permeable mat 3 prevents the coastal ground 4 and the sand drainage layer 2 from mixing.

Subsequently, the conductive drainage material 1 according to the embodiment of the present invention is inserted into the soft ground 4 through the sand drainage layer 2 and the permeable mat 3 at a predetermined interval using an insertion facility. Install.

Subsequently, an external power source 5 is connected to the conductive drainage material 1 according to the embodiment of the present invention exposed to the upper portion of the sand drainage layer 2 to apply power.

When the conductive drainage material according to the embodiment of the present invention is applied to the soft ground by the above method, the gap water is added to the conductive drainage material by adding the drainage effect by the electroosmotic drainage method generated between the positive and negative electrodes of the conductive drainage material. In addition, the capillary phenomenon takes the core material of the conductive drainage material and discharges the pore water into the sand drainage layer.

Conductive drainage according to the present invention can be applied to both the drainage capacity of the inherent function and the drainage capacity of the electroosmotic drainage method. By using the conductive drainage material according to the present invention, it is possible to apply a method that enables early drainage and early settling to reduce time and cost. In addition, the conductive drainage material according to the present invention can be poured by a general construction method. In addition, the conductive drainage material of the present invention can be applied to the improved method in the soft ground of the buried composition zone, such as lakes, swamps, coasts.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention, and it will be apparent to those skilled in the art that the present invention is not to be construed as limited by these examples.

Examples 1 to 5: Preparation of Conductive Drain

Example 1 Preparation of a Conductive Drainer Comprising a Conductive Member

ITO was deposited on the surface of the member (manufacturer: SPE industry, trade name: VG80) by sputtering to prepare a conductive member. Subsequently, the conductive member was combined with a core material (manufacturer: SPE industry, trade name: VG80) and a filter material (manufacturer: SPE industry, trade name: VG80) to complete the conductive drainage material.

Example 2 Preparation of a Conductive Drainer Comprising a Conductive Filter Material

70% by weight of conductive polymer (manufacturer: Bayer, trade name: Baytron PH), 13% by weight of water-soluble acrylic resin, 2% by weight of dispersant (manufacturer: BYK, trade name: disperbyk110), 3% by weight of distilled water, and isopropyl A conductive polymer coating solution including 10 weights of alcohol was provided.

The conductive polymer coating solution is formed on the surface of each core material (manufacturer: SPE industry, trade name: VG80) and the filter material (manufacturer: SPE industry, brand name: VG80) by spin coating to produce a conductive core material and a conductive filter material. It was. The conductive core material and the conductive filter material were combined to complete a conductive drain material.

Example 3 Preparation of a Conductive Drainer Comprising a Conductive Core Material

90 wt% polyethylene and 10 wt% copper were mixed to prepare a conductive core material. The conductive core material and the filter material (manufacturer: SPE industry, trade name: VG80) were combined to complete a conductive drain material.

Example 4 Preparation of a Conductive Drainer Comprising a Conductive Filter Material

The conductive filter material was manufactured by plating copper on the surface of a filter material (manufacturer: SPE industry, brand name: VG80) by the electroplating method. The conductive filter material and the core material (manufacturer: SPE industry, trade name: VG80) were combined to complete a conductive drain material.

Example 5 Preparation of a Conductive Drainer Comprising a Conductive Core Material and a Conductive Filter Material

A conductive core material was prepared by mixing 90% by weight of polypropylene and 10% by weight of copper. The conductive filter material was manufactured by plating copper on the surface of a filter material (manufacturer: SPE industry, brand name: VG80) by the electroplating method. The conductive filter material and the core material were combined to complete a conductive drain material.

Comparative Example 1: Drainage

Plastic drains (manufacturer: SPE industry, trade name: VG80) containing no conductive material were used.

Test Example: Evaluation of efficiency of drainage promotion method of soft ground using conductive drainage

Test Example 1 Evaluation of Settlement, Water Content, Consolidation Drainage and Shear Strength According to Conductive Drain

A model soft ground was prepared by filling a mixture of soil and water in a reactor made of acrylic (170 mm x 270 mm x 250 mm) up to 80%.

A power supply of 7 V was applied to the drains of Examples 1 to 5, and after 24 hours, the change in settlement amount, water content change, consolidation drainage amount, and shear strength were measured. The drainage of the comparative example measured the change in settlement, the change in water content, the consolidation drainage, and the shear strength after 24 hours without applying power. As a result, it is shown in Table 1 and Figures 4 to 7 below.

On the other hand, drainage and power were connected using forceps.

Item Comparative example Example 1 Example 2 Example 3 Example 4 Example 5 Settlement change 7.6 mm 11.8 mm 10.5 mm 18.1 mm 23.8 mm 28.5 mm Water content change 9.9% 15.5% 13.9% 17.3% 19.8% 23.4% Consolidation displacement 635 ml 665 ml 657 ml 862 ml 956 ml 1.270 ml Shear strength change 0.23㎪ 0.37㎪ 0.32㎪ 0.59㎪ 0.68㎪ 0.85㎪

Settlement: Force that lands or collapses due to loads or other factors from buildings or structures

Water content: the percentage of soil containing water

Consolidation drainage: the amount of water released from the soil

Shear strength change: the soil's ability to resist normal forces

Referring to Table 1 and FIGS. 3 to 6, it can be seen that Examples 1 to 5 are superior in all characteristics to Comparative Examples. In particular, Example 5 was found to be about 3.5 times better in settlement, 2.4 times in water content, about 2.0 times in consolidation drainage, and about 3.7 times in shear strength than Comparative Example.

In addition, it was found that imparting conductivity to both the core material and the filter material rather than providing the conductivity alone to the core material and the filter material alone showed excellent settlement, water content, consolidation drainage, and shear strength. It was found that imparting conductivity by adding internally rather than coating method showed superior settlement, moisture content, consolidation drainage and shear strength.

1-2: Evaluation of Settlement, Water Content, Consolidation Drainage and Shear Strength According to Voltage Change

The power supply of 0V, 3V, 5V, 7V was applied to the wastewater of Example 5, and after 24 hours, the change of settlement amount, water content change, consolidation drainage amount, and shear strength were measured. The results are shown in Table 2 and FIGS. 8 to 11.

Item 0 V 3 V 5 V 7 V Settlement change 7.9 mm 12.6 mm 16.9 mm 28.5 mm Water content change 9.5% 13.8% 17.6% 23.4% Consolidation drainage 629 ml 785 ml 862 ml 1270 ml Shear strength change 0.25 ㎪ 0.38㎪ 0.59㎪ 0.85㎪

As shown in Table 2 and Figures 7 to 9, as the voltage applied to the drainage increases, the sedimentation amount, water content, consolidation drainage and shear strength can be seen that the water is well discharged from the model soft ground.

1: conductive drain material 2: sand drain layer
3: permeable mat 4: soft ground
5: external power source 10: core material
11: filter material 12: member

Claims (14)

In the manufacturing method of the soft ground improvement drainage material containing a core material and a filter material,
A conductive material is formed on the surface or inside of one or two selected from a core material and a filter material. The method according to claim 1,
The conductive material is formed on one or two surfaces selected from the core material and the filter material by one or two or more methods selected from the group consisting of a coating method, a vacuum deposition method and a plating method. Way. The method according to claim 1,
And mixing the conductive material with one or two substrates selected from the core material and the filter material, and adding the conductive material into one or two materials selected from the core material and the filter material. In the method for producing a soft ground improvement drainage material comprising a core material, a filter material and a member,
A method for producing a conductive drainage material, characterized in that the conductive material is formed on one or two or more surfaces selected from the group consisting of a core material, a filter material and a member. The method of claim 4,
Forming the conductive material on one or two or more surfaces selected from the group consisting of the core material, the filter material and the member by one or two or more methods selected from the group consisting of a coating method, a vacuum deposition method and a plating method. Method for producing a conductive drainage, characterized in that. The method of claim 4,
The conductive material is mixed with one or two or more substrates selected from the group consisting of the core material, the filter material and the member, and then inside the one or two or more types selected from the group consisting of the core material, the filter material and the member. Method for producing a conductive drainage, characterized in that the addition. The method according to claim 1 or 4,
The conductive material is a method for producing a conductive drainage material, characterized in that it comprises one or two or more selected from the group consisting of a conductive polymer, conductive carbon, conductive ions, metals and conductive fillers. The method according to claim 7,
The conductive polymer is polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), poly (3,4-ethylenedioxythiophene), polyethylenedioxythiophene, polystyrenesulfonate, polyacetylene, polyphenylacetylene , Poly (p-phenylene), poly (m-phenylene), poly (p-phenylenevinylene), poly ((2,5-dialkoxy) p-phenylenevinylene), poly (p-vinyl Rensulfide), polyisocyanaphthalene, and polyheptadiene, or one or two or more selected from the group consisting of
The conductive carbon is one or two or more selected from the group consisting of ketjen black, acetylene black, carbon nanotubes, carbon fibers and graphite,
The conductive ion is one or two or more selected from the group consisting of tetraethylammonium, tetrabutylammonium, octadecyltrimethylammonium, trimethylammonium and perchlorate,
The metal is selected from the group consisting of gold, silver, copper, nickel, copper, zinc, ITO, aluminum, titanium, chromium, lithium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium and radium. 1 type, or 2 or more types,
The conductive filler is a method for producing a conductive drainage material, characterized in that one or two or more selected from the group consisting of tin oxide, zinc oxide, titanium oxide and aluminum oxide. In the soft ground improvement drainage material comprising a core material and a filter material,
A conductive drainage material comprising a conductive material. The method according to claim 9,
The conductive material is conductive drainage, characterized in that included in the surface or inside one or two selected from the core material and filter material. In the soft ground improvement drainage material comprising a core material, a filter material and a member,
A conductive drainage material comprising a conductive material. The method of claim 11,
The conductive material is a conductive drainage, characterized in that included in the surface or inside one or two or more selected from the group consisting of a core material, a filter material and a member. The method according to claim 9 or 11,
The conductive material is conductive drainage, characterized in that it comprises one or more selected from the group consisting of a conductive polymer, conductive carbon, conductive ions, metals and conductive fillers. The method according to claim 13,
The conductive polymer is polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), poly (3,4-ethylenedioxythiophene), polyethylenedioxythiophene, polystyrenesulfonate, polyacetylene, polyphenylacetylene , Poly (p-phenylene), poly (m-phenylene), poly (p-phenylenevinylene), poly ((2,5-dialkoxy) p-phenylenevinylene), poly (p-vinyl Rensulfide), polyisocyanaphthalene, and polyheptadiene, or one or two or more selected from the group consisting of
The conductive carbon is one or two or more selected from the group consisting of ketjen black, acetylene black, carbon nanotubes, carbon fibers and graphite,
The conductive ion is one or two or more selected from the group consisting of tetraethylammonium, tetrabutylammonium, octadecyltrimethylammonium, trimethylammonium and perchlorate,
The metal is selected from the group consisting of gold, silver, copper, nickel, copper, zinc, ITO, aluminum, titanium, chromium, lithium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium and radium. 1 type, or 2 or more types,
The conductive filler is a conductive drainage, characterized in that one or two or more selected from the group consisting of tin oxide, zinc oxide, titanium oxide and aluminum oxide.

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