KR20190048973A - Compositon for deterioration of concrete structure using regenerated polystyrene - Google Patents

Abstract

The present invention relates to a composition for preventing concrete deterioration using a recycled polystyrene resin and, more specifically, to a composition for preventing concrete deterioration which is economical by manufactured from the recycled polystyrene resin obtained from Styrofoam to be discarded and an ester compound, and has excellent application properties, water repellency, chemical resistance and strength. The composition for preventing concrete deterioration using the recycled polystyrene resin comprises 50 to 150 parts by weight of the recycled polystyrene resin based on 100 parts by weight of the ester compound.

Description

Technical Field [0001] The present invention relates to a composition for preventing deterioration of concrete using a recycled polystyrene resin,

The present invention relates to a concrete deterioration preventing composition using a recycled polystyrene resin, and more particularly, to a recycled polystyrene resin which is produced from a recycled polystyrene resin and an ester compound obtained from a styrofoam to be discarded and which is economical and has excellent applicability, water repellency, To an anti-deterioration composition.

Polystyrene is a synthetic resin obtained by polymerizing styrene. It has low softening point and is easy to process, and has excellent water resistance and chemical resistance.

Styrofoam is a product made by injecting hydrocarbon gas such as cyclopentane or butane into a polystyrene resin and then blowing it with steam, which is also called EPS (Expanded Polystyrene).

In general, Styrofoam is used as a buffering or heating means when packing objects that are subject to breakage, or as a thermal insulation material or insulation material in buildings or other areas requiring insulation or insulation. It has a high buoyancy, Has been widely used in applications such as buoyant materials and floats.

On the other hand, since styrofoam is bulky and can not be decomposed spontaneously, styrofoam is collected, stored and treated, thereby causing environmental pollution and pollution.

In order to solve these problems, recently, there is a growing interest in the field of recycling as a new product using waste styrofoam.

In Korea, styrofoam waste with good condition is collected separately, and then it is melted and compressed to make an ingot, and then it is made into a pellet-shaped recycled product.

These polystyrene recycled products have a limited application and low added value because they are inferior in quality to polystyrene new products.

 What we usually call concrete is a cement concrete made by cementing a mixture of Portland cement and gravel sand, which is used as aggregate, in a size and shape mold required by the structure. It is used as a composite material together with reinforcing steel It is possible to prevent the buckling of reinforcing steel and steel frame because of its high compressive strength. It has higher water tightness and higher rustproofing property than other construction materials, and can improve the durability and fire resistance of buildings such as preventing the strength reduction of reinforcing bars even at high temperatures.

Concrete is subject to deterioration due to various factors such as durability, inattention at construction, unbalance of force, natural disaster, etc. The deterioration phenomenon means that both the physical phenomena and the chemical phenomena And the phenomena that can be generated by deterioration of concrete include cracks, moxibustion, peeling, and pop-out.

Most deterioration is due to the alkalinity of Portland cement, sea sand containing chloride in excess of the allowable amount, the addition of a large amount of admixture, the aggregate containing the reactive substance, and the like.

In this connection, Korean Patent No. 10-1177349 discloses a method for coating a concrete (concrete) coat comprising a two-component type acrylic urethane mixed with an inorganic silicate to a concrete structure, thereby being harmless to the human body and preventing durability, The present invention proposes a paint composition for preventing corrosion and neutralization of concrete structures improved to improve stain resistance and a method for preventing the salt and neutralization of concrete structures using the same.

Korean Patent No. 10-1312327 discloses a method for forming a primer layer by removing impurities in a first stage and applying a water-soluble primer to the surface in a second stage, and then applying a mortar mixed with yellow earth and cement on a primer layer in a three- In step 4, a fiber layer is formed of PE (Poly Ethylene) fiber as a mesh, and in a fifth step, a sol material in which silicon material is mixed with vegetable tissue of Mackay tree is sprayed to cover the fibrous layer, A water-soluble primer having a mucilage, a neutralizer made of a water-soluble inorganic material, and a method for preventing neutralization of a concrete structure having a waterproof layer formed by a water-soluble coating agent.

However, the composition for preventing deterioration of concrete and the anti-neutralization according to the conventional patent documents are mostly made of acrylic resin or have a complicated process and thus have a practical limit.

In addition, there has been no case of a composition for preventing deterioration of concrete using a recycled polystyrene resin.

Korean Patent No. 10-1177349 (Paint composition for prevention of saltiness and neutralization of concrete structures) Korean Patent No. 10-1312327 (Method for preventing neutralization of concrete structures)

An object of the present invention to solve the above problems is to provide a concrete deterioration preventing composition which is produced by using the recycled polystyrene resin and the ester compound obtained from the discarded styrofoam and is economical and has excellent application, water repellency, chemical resistance and strength .

In order to solve the above problems, the composition for preventing deterioration of concrete using the reclaimed polystyrene resin of the present invention comprises 50 to 150 parts by weight of recycled polystyrene resin per 100 parts by weight of the ester compound.

In order to solve the above problems, the composition for preventing deterioration of concrete using the reclaimed polystyrene resin of the present invention comprises 50 to 150 parts by weight of a recycled polystyrene resin, 5 to 15 parts by weight of a silica filler, 0.01 to 3 parts by weight of a silicone oil 0.01 to 2 parts by weight of a silane coupling agent, and 0.1 to 0.5 parts by weight of a heat-resistant filler.

The ester compound is characterized by being a fatty acid ester, a phthalic acid ester, or a combination thereof.

The silica filler is a dry silica having a specific gravity of 1.5 to 4, a compressive density of 300 to 800 kg / m 3, an uncompacted density of 200 to 1000 kg / m 3, an average particle size of 10 nm to 80 μm, do.

The heat-resistant filler is characterized by having an average particle diameter of 1 to 500 nm and a specific surface of 10 to 500 m 2 / g.

As described above, according to the composition for preventing deterioration of concrete using the reclaimed polystyrene resin according to the present invention, it is economically produced by using a recycled polystyrene resin and an ester compound, and has an excellent coating property, water repellency, chemical resistance and strength.

Specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. The detailed description of the functions and configurations of the present invention will be omitted if it is determined that the gist of the present invention may be unnecessarily blurred.

The present invention relates to a concrete deterioration preventing composition using a recycled polystyrene resin, and more particularly, to a recycled polystyrene resin which is produced from a recycled polystyrene resin and an ester compound obtained from a styrofoam to be discarded and which is economical and has excellent applicability, water repellency, To an anti-deterioration composition.

The concrete deterioration preventive composition using the reclaimed polystyrene resin according to the first embodiment of the present invention comprises 50 to 150 parts by weight of recycled polystyrene resin per 100 parts by weight of the ester compound.

The regenerated polystyrene resin according to the present invention can be obtained by the following pretreatment method.

The recovered polystyrene resin according to the present invention can be obtained by compressing waste styrofoam into a compressor to reduce crushing and volumetric shrinkage, and pulverized waste styrofoam at 100 to 240 ° C to remove pores and form pellets and ingots A pulverizing step of pulverizing the waste styrofoam pellets to a size of 5 to 100 mu m and a pulverizing step of pulverizing the pulp pellets into a magnetic separator to select iron metal impurities and a magnetic separating step, And a vortex selection step of selecting non-ferrous metals.

The vortex sorting device is a device for selecting non-ferrous metals by using the induction principle of high frequency magnetic field. Due to the strong moving magnetic field built in the drum, it is possible to separate iron, non-metal, aluminum and copper. The vortex sorting machine is selected using the principle of eddy current. The permanent magnet drum which rotates rapidly inside the conveyor belt induces eddy currents in the nonmagnetic non-magnetic material passing over the belt to generate a magnetic field. This force acts in opposition to manpower, and nonferrous metals are picked up by non-ferrous metals contained in the pellets as they are repelled by the reaction forces when moving the conveyor belt.

Waste styrofoam can be obtained as a high-purity regenerated polystyrene resin through the above process, and the regenerated polystyrene resin can be a liquid phase or a solid phase in which the liquid phase is foamed.

The recycled polystyrene resin is contained in an amount of 50 to 150 parts by weight based on 100 parts by weight of the ester compound. When the recycled polystyrene resin is less than 50 parts by weight, it is difficult to form a coating film and durability. When the recycled polystyrene resin is more than 150 parts by weight, And the coating property is deteriorated.

The ester compound may be any one of fatty acid esters, phthalic acid esters, and combinations thereof, and more preferably, it may be a fatty acid benzyl ester or phthalic acid dibenzyl ester.

The ester preferably has an iodine value of 500 to 250 and a saponification value of 150 to 210.

In the case of the fatty acid ester, it may include, but is not limited to, soybean oil, seed oil, palm oil, and woji. More preferably, it may contain soybean oil.

The composition for preventing deterioration of concrete using the reclaimed polystyrene resin according to the second embodiment of the present invention comprises 50 to 150 parts by weight of a recycled polystyrene resin, 5 to 15 parts by weight of a silica filler, 0.01 to 3 parts by weight of a silicone oil 0.01 to 2 parts by weight of a silane coupling agent, and 0.1 to 0.5 parts by weight of a heat-resistant filler.

The silica filler is added to improve physical properties such as tensile strength and hardness, and has a specific gravity of 1.5 to 4, a compression density of 300 to 800 kg / m 3 and a non-compression density of 200 to 1000 kg / m 3 in consideration of dispersibility and reactivity , And an average particle size of 10 nm to 80 탆 can be used.

In addition, it is preferable that the silica filler minimizes the yellowing phenomenon by using dry silica which has not been subjected to the surface treatment.

The silica filler is added in an amount of 5 to 15 parts by weight based on 100 parts by weight of the ester compound. When the silica filler is added in an amount of less than 5 parts by weight based on 100 parts by weight of the ester compound, it is difficult to expect improvement in physical properties. , Aggregation occurs between each other and the dispersibility is lowered, and the physical properties are lowered. Therefore, it is preferable not to deviate from the above range.

The silicone oil is added in order to minimize bubbles generated during the melting and reaction of the reclaimed polystyrene resin while minimizing shrinkage deformation.

The silicone oil is added in an amount of 0.01 to 3 parts by weight based on 100 parts by weight of the ester compound. When the silicone oil is added in an amount of less than 0.01 based on 100 parts by weight of the ester compound, the effect of preventing bubble removal and shrinkage deformation is insignificant, It is preferable that the above range does not deviate.

The silicone oil may be selected from the group consisting of methylhydroxide siloxane, vinyl methylhydroxide siloxane, hexamethyldisilazane, 1,4-divinyltetramethyldisilazane, dimethyl silicone oil, methylphenylsiloxane, diphenylsiloxane, Any one of them may be used, but is not limited thereto.

In this case, it is preferable that the viscosity of the silicone oil is 1 to 500 cps at 25 캜 in consideration of volatility and processability.

The silane coupling agent is added to improve the reactivity and bonding property of the silica filler with the silicone oil and to impart water repellency.

The silane coupling agent may be at least one selected from the group consisting of a vinyl silane coupling agent, an alkoxysilane coupling agent, an aminosilane coupling agent, an epoxy silane coupling agent, a methacryloxy silane coupling agent, an acryloxy silane coupling agent, a ureido silane coupling agent, a mercaptosilane coupling agent, Any one of the groups selected from a combination of these may be used.

More specifically, there can be mentioned vinyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyl (Aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropyltriethoxysilane, triethoxysilane, , 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-ureidopropyltriethoxysilane, 3-chloropropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3- Isocyanate propyltriethoxysilane and the like can be used.

The silane coupling agent is added in an amount of 0.01 to 2 parts by weight based on 100 parts by weight of the ester compound. When the silane coupling agent is added in an amount of less than 0.01 based on 100 parts by weight of the ester compound, the effect is insignificant. The physical properties such as viscosity and tensile strength are lowered and voids may be generated, so that it is preferable not to deviate from the above range.

The heat-resistant filler is added in order to impart heat stability, flame retardancy and heat resistance, and to improve the filling rate and minimize deformation due to shrinkage and impact.

The heat-resistant filler may be selected from the group consisting of cerium, zinc oxide (ZnO), zinc carbonate, magnesium oxide, lead oxide, potassium hydroxide, iron, aluminum, zirconium, nickel, dysprosium, terbium, holmium, erbium , Ytterbium, and mixtures thereof, but the present invention is not limited thereto.

More preferably, the cerium compound may be used, and the cerium compound may be any one of cerium oxide, cerium carbonate, and cerium hydroxide, and combinations thereof, but is not limited thereto.

The cerium compound may be in the form of a powder or a liquid in which the cerium compound is dispersed in a resin or a dispersion. The cerium compound and the metal compound may be prepared by a sol-gel method or surface-treated with a surfactant to improve dispersibility and prevent re- It is also possible.

As the surfactant, conventionally known surfactants may be used, but it is more preferable to use a silicone surfactant. It is also possible to use phosphoric acid and alkali metal salts or ammonium salts thereof as a surface treatment agent.

The heat-resistant filler is characterized by having an average particle diameter of 1 to 500 nm and a specific surface area of 10 to 500 m 2 / g, and excellent dispersibility and reactivity at the average particle diameter and specific surface area.

The heat-resistant filler is added in an amount of 0.1 to 0.5 parts by weight based on 100 parts by weight of the ester compound. When the heat-resistant filler is added to the ester compound in an amount of less than 0.1 parts, the effect is insignificant. And the dispersibility is lowered. As a result, the physical properties may be deteriorated, so that it is preferable that the content does not deviate from the above range.

Also, in the composition for preventing deterioration of concrete using the reclaimed polystyrene resin according to the first and second embodiments of the present invention, 10 to 50 parts by weight of an aromatic petroleum resin may be added to 100 parts by weight of the ester compound.

The aromatic resin is added to improve plasticity and solubility. The aromatic resin may include phenols, aromatic carboxylic acids, aromatic nitro compounds, aromatic amines and the like. Specific examples thereof include aniline, nitrobenzene, trinitrotoluene, salicylic acid, Benzoic acid, cresol, and combinations thereof. However, the present invention is not limited thereto.

The aromatic resin has a softening point in the range of 130 to 250 ° C, an acid value of 25 mgKOH / g or less, a Gardner viscosity of K to O, a n-heptane dilution of 20 to 40 and a molecular weight of 500 to 2,000 However, the effect of improving plasticity and solubility is excellent within the above-mentioned range of conditions, and viscosity control is easy.

The aromatic resin is added in an amount of 10 to 50 parts by weight based on 100 parts by weight of the ester compound. If the aromatic resin is added in an amount of less than 10 parts by weight based on 100 parts by weight of the ester compound, the effect is insignificant. It is difficult to impart durability and it is difficult to form a coating and a film, so that it is preferable not to deviate from the above range.

In addition, the composition for preventing deterioration of concrete using the reclaimed polystyrene resin according to the first and second embodiments of the present invention can control the viscosity and processability by adding a thickener.

The thickener may be added in an amount of 0.5 to 3 parts by weight based on 100 parts by weight of the ester compound.

Specific examples of the thickener include chelated alkoxides, alkoxides and aluminum chelates, and more specifically, aluminum sec-butoxide (ASB), AIE-M (aluminum di-isopropoxide acetoacetic ester chelate) and OAO (oxyaluminum octoate). However, the present invention is not limited thereto.

When the thickener is added, it is preferable that the process conditions are performed at 150 to 180 ° C for 30 minutes to 2 hours in consideration of dispersibility and reactivity.

The composition according to the first embodiment and the composition according to the second embodiment are prepared by putting the respective components into a stirrer and mixing them at 100 to 240 ° C for 10 minutes to 60 minutes.

The composition for preventing deterioration of concrete using the recycled polystyrene resin according to the present invention can be used not only for preventing deterioration of concrete but also for water repellency to materials such as wood, brick and cloth and is used as a paint for asphalt paint It is also possible to do.

The present invention relates to a method of producing a concrete deterioration preventing composition using a recycled polystyrene resin, which comprises preparing the above-described recycled polystyrene resin-based concrete deterioration preventing composition, and does not duplicate the above-described characteristics.

The present invention relates to a method for producing a concrete deterioration preventing composition using a regenerated polystyrene resin, comprising the steps of: pre-treating a waste styrofoam to obtain a regenerated polystyrene resin; and mixing the constituents according to the first embodiment or the constituents according to the second embodiment Mixing step.

The pretreatment step includes a compressing step of pulverizing and compacting the waste styrofoam into a compressor, a pelletizing step of removing the voids by melting the pulverized waste styrofoam at 100 to 240 ° C to form pellets and ingots, And pulverized styrofoam pellets are pulverized to a size of 5 to 100 쨉 m. The pulverized pellets are charged into a magnetic separator to select iron metal impurities. The magnetic pellets are charged into a vortex separator to select non-ferrous metals And a screening step.

In the mixing step, the components according to the first embodiment or the components according to the second embodiment are put into a stirrer and mixed at 100 to 240 ° C for 10 minutes to 60 minutes.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments. It should be noted, however, that the present invention is not limited to the following examples.

Obtaining a regenerated polystyrene resin

The waste styrofoam was put into a compressor to be crushed, and the crushed waste styrofoam was melted at about 150 to 160 ° C for 30 minutes to prepare an ingot. The ingot was cooled at a room temperature of 20 to 30 DEG C for 20 minutes and then pulverized to have an average particle size of 50 mu m.

The pulverized pellets were charged into a magnetic separator to select iron metal impurities, and finally, the pulverized pellets were put into a vortex classifier to select non-ferrous metals to obtain a recovered polystyrene resin having improved purity.

Preparation of ester compounds

As the fatty acid ester, soybean oil fatty acid benzyl ester and phthalic acid ester phthalic acid dibenzyl ester were prepared. The average molecular weight, the flash point and the pour point of the ester were as shown in Table 1 below.

Average molecular weight flash point Pour point Soybean oil fatty acid benzyl ester 353 230 ℃ or higher -5 ℃ Phthalic acid dibenzyl ester 345 230 ℃ or higher -

Viscosity was confirmed by varying the content of the ester compound in Table 1, the prepared regenerated polystyrene resin and the aromatic resin (phenol resin).

Table 2 below shows the viscosities of the ester compound, the prepared regenerated polystyrene resin and the aromatic resin with respect to the addition amount.

The components according to Examples 1 to 6 were melted in an oven at 135 캜 for 60 minutes using a driving mixer, and the viscosity was confirmed at 135 캜.

The concrete deterioration preventing composition using the reclaimed polystyrene resin according to the embodiment of the present invention was found to have an appropriate viscosity of 1000 to 1800 cP, and was also excellent in coating and mixing properties.

In addition, it was confirmed that the viscosity was lowered depending on the content of the aromatic resin, and it was expected that the viscosity and the coating property could be controlled by controlling the content of the aromatic resin.

In addition, the composition for preventing deterioration of concrete of the present invention is virtually colorless because it is almost naked, so that it can be applied not only to compositions for preventing deterioration of concrete but also to water repellency, durability and chemical resistance without being affected by materials such as asphalt paint and wood for construction, wood, brick and cloth Can be used in the fields where it is necessary.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as limiting the scope of the present invention. The present invention can be variously modified or modified. The scope of the invention should, therefore, be construed in light of the claims set forth to cover many of such variations.

Claims (5)

Characterized by comprising 50 to 150 parts by weight of a recycled polystyrene resin per 100 parts by weight of the ester compound
A composition for preventing deterioration of concrete using recycled polystyrene resin.
50 to 150 parts by weight of a recycled polystyrene resin, 5 to 15 parts by weight of a silica filler, 0.01 to 3 parts by weight of a silicone oil, 0.01 to 2 parts by weight of a silane coupling agent and 0.1 to 0.5 parts by weight of a heat resistant filler per 100 parts by weight of an ester compound Characterized in that
A composition for preventing deterioration of concrete using recycled polystyrene resin.
3. The method according to claim 1 or 2,
The ester compound
Fatty acid esters, phthalic acid esters, and combinations thereof.
A composition for preventing deterioration of concrete using recycled polystyrene resin.
3. The method of claim 2,
The silica filler
Characterized in that it is a dry silica having a specific gravity of 1.5 to 4, a compressive density of 300 to 800 kg / m 3, an uncompacted density of 200 to 1000 kg / m 3, an average particle size of 10 nm to 80 μm,
A composition for preventing deterioration of concrete using recycled polystyrene resin.
3. The method of claim 2,
The heat-
An average particle diameter of 1 to 500 nm, and a specific surface of 10 to 500 m < 2 > / g.
A composition for preventing deterioration of concrete using recycled polystyrene resin.