KR20230157711A - Petroleum resin binder applied to recycled aggregate for auxiliary base layer - Google Patents

Abstract

The present invention is a petroleum resin binder applied to recycled aggregate for a subbase, comprising: water; petroleum resin; waste plastic; A liquefying agent for liquefying the waste plastic; and an emulsifier for emulsification between the water, the petroleum resin, and the liquefied waste plastic, wherein the petroleum resin and the liquefied waste plastic relate to a petroleum resin binder present as colloidal particles in the water. According to this, it is possible to manufacture a petroleum resin binder containing liquefied waste plastic prepared through room temperature liquefaction treatment, and thus, in addition to the eco-friendliness of petroleum resin, it is possible to provide a petroleum resin binder with eco-friendliness through recycling of waste plastic.

Description

Petroleum resin binder applied to recycled aggregate for subbase {PETROLEUM RESIN BINDER APPLIED TO RECYCLED AGGREGATE FOR AUXILIARY BASE LAYER}

The present invention is a petroleum resin binder applied to recycled aggregate for a subbase, and relates to a petroleum resin binder manufactured using waste plastic.

Waste plastic, which has been continuously generated since industrialization, has recently increased exponentially in production and is being pointed out as a major factor in environmental pollution and ecosystem destruction. Until now, disposal of waste plastics has been done by exporting them to developing countries, including China, but this has become unfeasible due to export regulations in other countries, so ways to process waste plastics through recycling are being explored.

In particular, the number of cases of recycling waste plastic in the road paving field is increasing. This is because road paving is accompanied by large-scale construction, and the number of construction projects is frequent compared to other fields, so a significant amount of waste plastic can be recycled and disposed of. .

An example of use in road paving is when liquefied waste plastic prepared by high-temperature treatment of solid waste plastic is added during the production of emulsified asphalt binder. Adding waste plastic can help improve the physical properties as a binder and reduce the proportion of harmful asphalt used, thereby improving eco-friendliness.

However, since high-temperature treatment of solid waste plastic generates harmful gases, causing air pollution, and as asphalt is still used as the main material for binders, emulsified asphalt binders using solid waste plastic have limitations in improving eco-friendliness. It is showing.

Therefore, the need for an eco-friendly binder that does not use asphalt and can recycle waste plastic in an eco-friendly manner is increasing.

Therefore, the purpose of the present invention is to provide a petroleum resin binder applied to recycled aggregate for a subbase layer, which has eco-friendliness through recycling of waste plastic in addition to the eco-friendliness of petroleum resin by adding liquefied waste plastic prepared through room temperature liquefaction treatment. It provides a petroleum resin binder.

The object of the present invention described above is a petroleum resin binder applied to recycled aggregate for a subbase, comprising: water; petroleum resin; waste plastic; A liquefying agent for liquefying the waste plastic; and an emulsifier for emulsification between the water, the petroleum resin, and the liquefied waste plastic, wherein the petroleum resin and the liquefied waste plastic can be achieved by a petroleum resin binder present as colloidal particles in the water.

According to this, it is possible to manufacture a petroleum resin binder containing liquefied waste plastic prepared through room temperature liquefaction treatment, and thus, in addition to the eco-friendliness of petroleum resin, it is possible to provide a petroleum resin binder with eco-friendliness through recycling of waste plastic.

The liquefying agent includes a hydrophilic solvent. According to this, it is possible to provide a petroleum resin binder in which the emulsification degree of liquefied waste plastic in water is further improved compared to the case of using a lipophilic solvent.

It contains sodium hydroxide, which increases the emulsifying power between the water, the petroleum resin, and the liquefied waste plastic by the emulsifier. According to this, it is possible to provide a petroleum resin binder with further improved emulsification of liquefied waste plastic and petroleum resin in water.

It is manufactured from 30 to 80 parts by weight of the water, 20 to 70 parts by weight of the petroleum resin, 20 to 50 parts by weight of the waste plastic, 10 to 15 parts by weight of the liquefaction agent, and 0.5 to 10 parts by weight of the emulsifier. According to this, it is possible to provide a petroleum resin binder with improved usability and usability.

The object of the present invention described above is the step of mixing two or more different types of liquefied waste plastic with petroleum resin; Mixing the mixed petroleum resin and the two or more liquefied waste plastics in water with an emulsifier to produce a petroleum resin binder; And it can also be achieved by mixing recycled aggregate coated with at least one molten waste plastic and the produced petroleum resin binder to produce recycled asphalt concrete.

According to this, since a large amount of waste plastic coated on recycled aggregate can be utilized, eco-friendliness can be further improved through recycling of waste plastic.

According to the present invention, as a petroleum resin binder applied to recycled aggregate for a subbase, liquefied waste plastic prepared through room temperature liquefaction treatment is added, and in addition to the eco-friendliness of petroleum resin, the petroleum resin binder has eco-friendliness through recycling of waste plastic. can be provided.

1 shows a composition of a petroleum resin binder and recycled asphalt concrete according to an embodiment of the present invention.
Figure 2 shows the manufacturing process of petroleum resin binder and recycled asphalt.
Figure 3 shows an example of an experiment to confirm the degree of reduction of hazardous substances in relation to the petroleum resin binder of Figure 1.
Figure 4 shows an experimental example to confirm the degree of emulsification improvement by a hydrophilic liquefying agent in relation to the petroleum resin binder of Figure 1.
Figure 5 shows an experimental example to confirm the degree of emulsification improvement by natural emulsifiers and emulsification aids in relation to the petroleum resin binder of Figure 1.
Figure 6 shows a composition of a petroleum resin binder and recycled asphalt concrete according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. This is intended to provide a detailed description so that a person skilled in the art can easily carry out the invention, and as such, the technical idea and scope of the present invention are not limited. .

Figure 1 shows a composition of a petroleum resin binder and recycled asphalt concrete according to an embodiment of the present invention.

The petroleum resin binder 20 according to this embodiment is a mixed solution that is applied to the recycled aggregate 10 and allows the recycled aggregate 10 to be recycled as recycled asphalt concrete 15 for a subbase. Here, the subbase layer is a component of the multiple layers that make up the paved road, and is located between the base layer and the subgrade. The subbase distributes the traffic load transmitted from the upper surface layer and base layer and transfers it to the subgrade, and prevents fine particles of the subgrade soil from intruding into the base layer. In addition, it serves as a waterproof layer that prevents moisture from entering and pooling between the base layer and the subgrade, minimizing damage to the pavement structure due to moisture freezing. However, since the recycled aggregate 10 is not limited to recycled asphalt concrete 15 for the subbase layer, it can be recycled for the surface layer, base layer, etc. depending on the situation.

Recycled aggregate (10) is obtained by crushing waste asphalt concrete, construction waste, etc. In particular, in the case of recycled aggregate (10) crushed from waste asphalt concrete, the physical properties required for the subbase are reduced due to oxidation by oxygen in the air over a long period of time, molecular cutting by ultraviolet rays, drying due to evaporation of asphalt, etc. needs to be supplemented.

In addition, when recycled aggregate 10 crushed from waste asphalt concrete is used as is, a large amount of environmental hormones such as benzopyrene are leaked from the aged asphalt remaining on the surface of the recycled aggregate 10, and the leak of environmental hormones is caused by rainwater. If domestic water is polluted or the air is polluted by the wind, it can seriously result in many cancer patients in nearby residences, so it is necessary to block environmental pollutants.

Therefore, for the reasons of performance restoration and environmental improvement, the recycled aggregate 10 is applied as a binder and recycled for road pavement for the subbase. However, although asphalt binders are helpful in restoring performance, they not only emit toxic substances such as carbon monoxide (CO) and hydrogen sulfide (H ₂ S) during the manufacturing and management process, but also are exposed to rainwater, etc. when used for subbase road paving. There is still a risk of environmental hormone leakage.

In order to overcome the harmfulness of the asphalt binder, the petroleum resin binder 20 according to this embodiment uses a petroleum resin 12, which is more environmentally friendly than the asphalt binder, and the petroleum resin 12 is dispersed as colloidal particles in the water 11. manufactured into existence. In particular, the petroleum resin 12 can be mixed with the recycled aggregate 10 at room temperature, so it is not restricted by temperature constraints. Petroleum balance (12) will be explained in more detail later.

In addition, since the petroleum resin binder 20 according to this embodiment is manufactured using waste plastic, eco-friendliness can be further improved by using the petroleum resin 12. Waste plastic is relatively stable at high temperatures, and not only can improve the adhesion between recycled aggregates 10, but also helps in elasticity between recycled aggregates 10, which is advantageous in improving durability.

In particular, the waste plastic used in the petroleum resin binder (20) is liquefied waste plastic (3) in which room temperature liquefaction treatment has been performed on the solid waste plastic (1) using a liquefying agent (2). The liquefied waste plastic (3) manufactured through room temperature liquefaction treatment is emulsified in water (11) together with the petroleum resin (12) and dispersed in the water (11) as colloidal particles. Hereinafter, with reference to FIG. 1, the composition of the petroleum resin binder 20 manufactured using petroleum resin 12 and liquefied waste plastic 3 and the manufacturing process of the petroleum resin binder 20 will be described in more detail. .

Solid waste plastic (1) is composed of solid plastic resin and refers to thermoplastic resin. As an example, solid waste plastic (1) includes poly amide, poly vinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), poly styrene, poly styrol, and poly etylene. ), poly urethane, methyl methacrylate, poly butadiene, ethylene-butene copolymer, ethylene-octene copolymer, styrene - Contains at least one of a styrene-butadiene block copolymer, a styrene-isoprene block copolymer, or an elastomer. The solid waste plastic 1 may be any one of the above various thermoplastic resins, or a combination thereof. Of course, the type of solid waste plastic 1 is not limited to the above, so waste plastic of various components can be used as long as it has thermoplastic properties.

Solid waste plastic (1) can be obtained from a waste plastic collection plant. Typically, waste plastic collection plants classify waste plastics that are primarily separated and collected from recycling bins and recycling centers scattered throughout the country into a more precise secondary classification by size, type, color, and composition. Then, the sorted waste plastic is cut into solid forms such as chips and pellets for easy storage and recycling. The solid waste plastic 1 used in this embodiment is cut from a waste plastic collection plant and, if necessary, may have been washed to remove external substances.

The liquefying agent (2) is a solvent used for room temperature liquefaction of solid waste plastic (1). Therefore, even if the solid waste plastic 1 is changed into liquefied waste plastic 3 by the liquefying agent 2, the properties of the plastic resin are maintained as is, and only the particles of the plastic resin remain in a decomposed state.

The liquefying agent (2) includes a hydrophilic solvent. For example, the hydrophilic solvent may include acetone, methyl ethyl ketone, etc. Hydrophilic solvents enable room temperature liquefaction treatment for solid waste plastics (1) and have excellent solubility in water (11). On the other hand, lipophilic solvents or amphoteric solvents such as toluene, benzene, etc. have low solubility in water (11) compared to hydrophilic solvents, even though room temperature liquefaction treatment of solid waste plastics (1) is possible. The solubility in water 11 is related to the degree of emulsification of the liquefied waste plastic 3 in water 11, which will be described later, and will be explained in detail in the corresponding section.

Since the liquefied waste plastic 3 may contain various impurities, even if the waste plastic has been washed, it may undergo an additional purification process. As an example, liquefied plastic (3) can be purified using sulfuric acid and sulfuric clay. When sulfuric acid is added to the liquefied plastic 3, the sulfuric acid burns and settles the impurities in the liquefied plastic 3, and the impurities are precipitated along with the remaining sulfuric acid in the lower layer of the liquefied plastic 3. If activated clay is additionally added, the activated clay may adsorb and precipitate impurities that were not removed by sulfuric acid. Residuals of sulfuric acid or white clay and precipitated impurities are removed from the liquefied plastic (3) through centrifugation, and high purity liquefied plastic (3) can be obtained through the centrifugation process. However, the method of removing impurities in the liquefied plastic 3 is not limited to the above and may be provided in various ways.

The petroleum resin binder (20) is manufactured by mixing water (11), petroleum resin (12), and liquefied waste plastic (3). Water 11 is a dispersion medium for the petroleum resin 12, and can be prepared to have a neutral pH of 7 so that the petroleum resin binder 20 can be more easily manufactured. Water 11 may be purified water, distilled water, etc.

Petroleum resin (12) is a dispersant that is dispersed in water (11) and exists as colloidal particles. Petroleum resin 12 is an oil obtained as a by-product of the petroleum refining process or petrochemical industry, and is made from a substance containing olefin or di-olefin. The petroleum resin 12 may be of aromatic or aliphatic type, or a combination thereof may be used. As an example, the petroleum resin 12 includes HIKOTACK® P-90 from KOLON INDUSTRIES ^TM . HIKOTACK® P-90 is an aromatic C9 petroleum resin, a light yellow thermoplastic resin obtained through polymerization of aromatic olefin generated in the naphtha pyrolysis process.

The petroleum resin 12 serves to improve strength, wear resistance, corrosion resistance, durability, adhesion, adhesion, etc. by coating the surface of the recycled aggregate 10 so that the recycled aggregate 10 has physical properties for use as a subbase. In addition, it covers the aged surface of the recycled aggregate 10 and asphalt, fundamentally blocking environmental pollutants that may leak from it.

The petroleum resin binder (20) includes an emulsifier (4). The emulsifier (4) may be an anionic emulsifier used for emulsification between water (11), petroleum resin (12), and liquefied waste plastic (3). That is, the emulsifier 4 is selected to have anionic properties in consideration of the degree of emulsification of the petroleum resin 12 with respect to water 11 as well as the degree of emulsification of the liquefied waste plastic 3 with respect to water 11. For example, fatty acid salts, carboxylic acid salts, sulfuric acid ester salts, sulfonate salts, phosphoric acid ester salts, SS-1, SS-1H, etc. may be used as the emulsifier (4).

In the case of anionic emulsifiers, they have excellent emulsibility in water (11) and can improve the solubility of petroleum resin (12) and liquefied waste plastic (3) in water (11). In addition, when an anionic emulsifier is used, it is possible to prevent the peeling of the plastic resin of the petroleum resin 12 and the liquefied waste plastic 3 from the water 11. On the other hand, in the case of cationic emulsifiers, the emulsibility of water 11 is lower than that of anionic emulsifiers, so not only the curing period of the petroleum resin binder 20 is prolonged, but also the peeling phenomenon of the petroleum resin 12 and the plastic resin. may result in

In this way, the petroleum resin binder 20 according to this embodiment is not only more environmentally friendly than the case of using asphalt in that it uses petroleum resin 12, but also the petroleum resin 12 is dispersed in water 11. Since it exists as colloidal particles and can be mixed with recycled aggregate (10) at room temperature, it is convenient to use compared to the simple heating mixing method that heats asphalt at high temperature and applies it to road pavement, and can be easily utilized at work sites.

In addition, there may be cases where liquefied waste plastic (23 in FIG. 3) obtained through high-temperature melt processing of solid waste plastic (1) is mixed with petroleum resin (12), but suffocation occurs during the high-temperature melt processing of more than 200 degrees Celsius. Since it can emit toxic gases such as hydrogen chloride (HCl) and hydrogen cyanide (HCN), and formaldehyde (HCHO), an atopy-causing substance, the use of waste plastic defeats the purpose of improving the environment through petroleum resin (12). can do.

As in this embodiment, by using the liquefied waste plastic (3) obtained by liquefying the solid waste plastic (1) at room temperature, the generation of toxic gas fatal to the human body can be prevented, so it is possible to prevent the use of petroleum resin (12). It is possible to provide a petroleum resin binder (20) with improved environmental friendliness.

According to various embodiments, the petroleum resin binder 20 includes an emulsification aid 6 that increases the solubility of the emulsifier 4 in water 11. For example, the emulsification aid 6 includes sodium hydroxide. Sodium hydroxide induces the emulsifier (4) to exhibit negative ions, allowing the emulsifier (4) to have a higher solubility in water (11). As the solubility of the emulsifier (4) in water (11) increases, the solubility of the petroleum resin (12) and the liquefied waste plastic (3) in water (11) also improves, so that the solubility of the emulsifier (4) in water (11) increases. It can help prevent agglomeration of petroleum resin (12) and liquefied waste plastic (3) and maintain the dispersion state.

According to various embodiments, the emulsifier 4 includes a natural emulsifier 5 comprising a natural resin component. The natural resin component may be extracted from natural wood or natural resin. For example, it may be manufactured based on resin extracted from copaiba trees, carnauba palm trees, Brazil nut trees, etc., but is not limited thereto, and is extracted from various forests in tropical regions. It may be manufactured based on a prepared resin.

The natural emulsifier (5) is superior in eco-friendliness and biocompatibility compared to emulsifiers made of organic compounds, and has high solubility in water (11), so it is easily diluted in water (11) even at room temperature. When sodium hydroxide is used together or is prepared as an emulsifier for liquefaction through liquefaction treatment of natural resin components, the solubility and dilution of the natural emulsifier (5) in water (11) can be further improved.

As a natural emulsifier (5), Emulsifen G5000 from POLYTRADE ^™ can be used. G5000 is not only environmentally friendly compared to emulsifiers made of organic compounds due to its low impact on the soil ecosystem, but also has high cost efficiency as its manufacturing cost is not high. When G5000 is used, octylphenol ethoxylate may be added as an emulsifying aid (6) to improve the emulsifying power of G5000. Octylphenol ethoxylate can be used as a product with HLB 17.6 from TRITON ^TM (e.g. X-405).

In this way, when manufacturing the petroleum resin binder 20 to which liquefied waste plastic 3 is added, using a natural emulsifier 5 not only improves eco-friendliness through recycling, but also improves eco-friendliness through recycling, and when using an emulsifier made of organic compounds. Compared to this, biocompatibility can be further improved.

In addition, when a natural emulsifier (5) is used, when an emulsification aid (6) such as octylphenol ethoxylate is added, water (11), petroleum resin (12), and liquefied waste plastic ( 3) The degree of emulsification of the liver can be improved more easily. Of course, the degree of emulsification can be improved by controlling the solubility with sodium hydroxide, so octylphenol ethoxylate and sodium hydroxide can be used together to improve the degree of emulsification.

According to various embodiments, the petroleum resin binder 20 may include an anti-stripping agent as an additive 7. When the moisture evaporates after the petroleum resin binder (20) is applied to the recycled aggregate (10), the petroleum resin (12) and the plastic resin of the liquefied waste plastic (3) remain coated on the recycled aggregate (10). However, when moisture evaporates, the petroleum resin 12 and the plastic resin may peel off from the surface of the recycled aggregate 10, and the anti-separation agent serves to prevent this peeling phenomenon. The peeling phenomenon can also occur due to the aging of the petroleum resin 12 and the plastic resin over time. Since the anti-separation agent can improve the adsorption sustainability of the petroleum resin 12 and the plastic resin, it can be caused by the aging of the petroleum resin 12 and the plastic resin. Peeling can also be prevented.

It is preferable that the peeling prevention agent is prepared from a heat-resistant ingredient. For example, the peeling prevention agent is an anionic peeling prevention agent and includes fatty acid-based, straight-chain alkyl benzene-based, alpha olefin-based, normal paraffin-based, etc. The fatty acid group includes fatty acid salts and alpha-sulfonated fatty acid ester salts, and the straight-chain alkyl benzene group includes straight-chain alkyl benzene sulfonate salts. Alpha olefin series and normal paraffin series include alpha olefin sulfonates and alkyl sulfonates.

According to various embodiments, additive 7 includes a water-based acrylic emulsion adhesive. Water-based acrylic emulsion adhesive is used to improve adhesion between petroleum resin (12) and recycled aggregate (10) made of plastic resin.

Water-based acrylic emulsion adhesive is composed of acrylic as the main ingredient, and styrene monomer, which is used as an adhesive strength regulator, and N-methylol acrylamide monomer, which is used as a heat resistance imparting agent, are mixed with acrylic acid. By crosslinking, the surface adhesion of the petroleum resin 12 to the recycled aggregate 10 is improved, and the adhesion can improve water resistance, abrasion resistance, light resistance, elasticity resistance, fire resistance, chemical resistance, sound insulation, and heat insulation. .

According to various embodiments, the petroleum resin binder 20 includes an auxiliary resin 8 to improve adhesion. The auxiliary resin 8 for improving adhesion is intended to improve the adhesion between the recycled aggregates 10 by the petroleum resin 12 and includes at least one of rosin and rosin ester. The auxiliary resin 8 may be added to the petroleum resin 12 before the petroleum resin 12 is mixed with the water 11.

However, since the natural emulsifier (5) can also perform the function of improving adhesion, depending on the road pavement environment, if the required adhesion is achieved only with the natural emulsifier (5), the auxiliary resin (8) for improving adhesion may be omitted. there is.

In this way, by using the water-based acrylic emulsion adhesive and the auxiliary resin (8) as the additive (7), the adhesiveness and adhesion of the petroleum resin (12) can be further improved.

Referring again to Figure 1, water (11), petroleum resin (12), and liquefied waste plastic (3) go through a mixing process with the above-mentioned emulsifier (4). The mixing process can be performed at high speed by a mixing device 13 such as a colloid mill. Through the mixing process, the plastic resin of the petroleum resin (12) and the liquefied waste plastic (3) exists as colloidal particles with an average particle diameter of 1 to 5㎛. During the mixing process, an electric charge is imparted to the surface of the petroleum resin 12 and the plastic resin, and agglomeration between particles can be prevented. Since the mixing device 13 is not limited to the colloid mill, a grinding device, a grinding device, a grinder, etc. may be used in addition to or together with the colloid mill.

The mixer 14 stirs the petroleum resin binder 20 and the recycled aggregate 10 prepared through the above manufacturing process. The stirring process can be performed at room temperature, and through the stirring process, the recycled aggregate 10 is applied with the petroleum resin binder 20. When the recycled aggregate 10 is applied with the petroleum resin binder 20, recycled asphalt concrete 15 that can be used for road paving, such as for subbase, is prepared.

In order for the recycled aggregate (10) to be recycled as recycled asphalt concrete (15) for the subbase, it must satisfy the particle size according to the standard specifications, which is a quality standard for the subbase. However, depending on the manufacturing environment of the recycled aggregate 10, the particle size range of the recycled aggregate 10 is somewhat wide, ranging from 0.08 mm to 75 mm, so it may be difficult to meet the quality standards for subbase use. In this case, quality standards can be satisfied by appropriately mixing at least three types of recycled aggregate 10 for each particle size.

Below, the composition or mixing ratio of each raw material for manufacturing the petroleum resin binder 20 will be described in detail. The petroleum resin binder (20) is 30 to 80 parts by weight of water (11), 20 to 70 parts by weight of petroleum resin (12), 20 to 50 parts by weight of liquefied waste plastic (3), 10 to 15 parts by weight of liquefaction agent (2), and It consists of 0.5 to 10 parts by weight of emulsifier (4). If sodium hydroxide is included as the emulsification aid (6), 0.1 to 1.0 parts by weight of sodium hydroxide may be included in the composition.

If the water 11 is less than 30 parts by weight, the concentration of various additives such as the emulsifier 4 and the petroleum resin 12 becomes thick, so the mixing resistance may increase, making it difficult to manufacture the petroleum resin binder 20. You can. On the other hand, if the water (11) is greater than 80 parts by weight, the concentration of various additives such as the emulsifier (4) becomes diluted, and the intended effect through the additive may not be achieved. For example, the degree of emulsification by the emulsifier 4 may decrease, or the solubility of the emulsifier 4 in water 11 may decrease.

If the petroleum resin (12) is less than 20 parts by weight, the strength, etc. of the recycled aggregate (10) may decrease, and if it is larger than 70 parts by weight, the strength, etc. may be strengthened too much and cracks may occur in the recycled aggregate (10). there is.

If the liquefying agent (2) is less than 10 parts by weight, the penetration power is reduced due to low viscosity, and the adhesion of the plastic resin to the recycled aggregate (10) may decrease, and if it is larger than 15 parts by weight, the liquefied waste plastic (3) ) may be delayed in curing.

If the liquefied waste plastic (3) is less than 20 parts by weight, the strength, etc. of the recycled aggregate (10) may decrease, and if it is larger than 50 parts by weight, the strength, etc. may be strengthened too much, causing cracking in the recycled aggregate (10). You can.

If the emulsifier (4) is less than 0.1 part by weight, the curing period of the petroleum resin binder (20) may be delayed, and if it is greater than 0.5 parts by weight, water (11), petroleum resin (12), and liquefied waste plastic (3) Phase separation between the liver may occur.

On the other hand, if the sodium hydroxide is less than 0.1 part by weight, the solubility of the emulsifier 4 in water 11 is not sufficient, so the curing period of the petroleum resin binder 20 may be delayed, and if it is greater than 1.0 parts by weight, Phase separation between water (11), petroleum resin (12), and liquefied waste plastic (3) may occur.

According to this mixing ratio, the performance as a binder can be improved, and thus the petroleum resin binder 20 with improved usability and usability can be provided.

According to various embodiments, the petroleum resin binder 20 includes 30 to 80 parts by weight of water (11), 20 to 70 parts by weight of petroleum resin (12), 20 to 50 parts by weight of liquefied waste plastic (3), and a liquefying agent ( 2) 10 to 15, consisting of 0.1 to 0.5 parts by weight of natural emulsifier (5), 0.1 to 1.0 parts by weight of sodium hydroxide, and 0.1/3 to 0.5/3 parts by weight of octylphenol ethoxylate. The reason why water 11, etc. should be composed in an optimal ratio according to the present embodiment overlaps with the content described above, and will therefore be omitted.

If the natural emulsifier (5) is less than 0.1 part by weight, it is less environmentally friendly and the curing period of the petroleum resin binder (20) may be delayed, and if it is greater than 0.5 parts by weight, water (11), petroleum resin (12) and Phase separation between liquefied waste plastics (3) may occur.

If the octylphenol ethoxylate is less than 0.1/3 parts by weight, the degree of emulsification by the natural emulsifier (5) cannot be sufficiently improved, and the curing period of the petroleum resin binder (20) may be delayed, and 0.5/3 parts by weight If it is greater than 100%, the degree of emulsification may be excessively improved, and a phase separation phenomenon may occur between water (11), petroleum resin (12), and liquefied waste plastic (3).

According to this mixing ratio, it is possible to provide a petroleum resin binder (20) with improved eco-friendliness and emulsification.

According to various embodiments, the petroleum resin binder 20 is composed of water 11, petroleum resin 12, liquefied waste plastic (3), liquefaction agent (2), natural emulsifier (5), sodium hydroxide, and octylphenol. With respect to the above mixing ratio with respect to the toxylate, the additive (7) is composed of 0.1 to 3.0 parts by weight of an anti-separation agent and 0.1 to 3.0 parts by weight of a water-based acrylic emulsion adhesive.

If the anti-separation agent is less than 0.1 part by weight, the petroleum resin 12 and the plastic resin are easily peeled off from the surface of the recycled aggregate 10, and if it is larger than 3.0 parts by weight, the sustainability of the anti-separation effect may be reduced.

If the water-based acrylic emulsion adhesive is less than 0.1 parts by weight, the strength, etc. of the recycled aggregate (10) may decrease, and if the water-based acrylic emulsion adhesive is larger than 3.0 parts by weight, the strength, etc. may be strengthened too much, causing cracks in the recycled aggregate (10). phenomenon may occur.

According to this mixing ratio, it is possible to provide a petroleum resin binder (20) with improved adhesion and adhesion of the petroleum resin (12) and the plastic resin to the recycled aggregate (10).

According to various embodiments, the petroleum resin binder 20 is composed of water 11, petroleum resin 12, liquefied waste plastic (3), liquefaction agent (2), natural emulsifier (5), sodium hydroxide, and octylphenol. In addition to the above mixing ratio for toxin, it may consist of 1 to 30 parts by weight of auxiliary resin (8).

If the auxiliary resin (8) is less than 1 part by weight, the strength, etc. of the recycled aggregate (10) may decrease, and if the auxiliary resin (8) is more than 30 parts by weight, the strength, etc. may be too strengthened and the recycled aggregate (10) Cracks may occur.

Figure 2 shows the manufacturing process of petroleum resin binder and recycled asphalt.

As shown in Figure 2, liquefied waste plastic (3) is manufactured through liquefaction treatment of solid waste plastic (1) (S21). The liquefaction treatment is carried out at room temperature, and a liquefaction agent (2) is used.

In this way, since high-temperature melt processing of the solid waste plastic (12) is not required to obtain the liquefied waste plastic (3), not only environmental damage caused by harmful gases generated during high-temperature melt processing but also human damage can be prevented in advance. there is.

Liquefied waste plastic (3) is mixed with petroleum resin (12) (S22). If the liquefied waste plastic (3) is first added to the water (11), agglomeration or agglomeration occurs, and even if the petroleum resin (12) and the emulsifier (4) are added later, the liquefied waste plastic (3) to the water (11) ) may be difficult to improve the emulsification degree.

Therefore, mixing the liquefied waste plastic 3 with the petroleum resin 12 first may be advantageous in improving the degree of emulsification of the liquefied waste plastic 3 with respect to the water 11. Additionally, in order to facilitate mixing between the petroleum resin 12 and the liquefied waste plastic 3, they can be mixed while each is heated to 150 degrees Celsius.

The petroleum resin binder (20) is manufactured by mixing the mixed petroleum resin (12) and liquefied waste plastic (3) with water (11) along with an emulsifier (4) (S23). When water (11) is heated to 50 degrees Celsius and the mixed petroleum resin (12) and liquefied waste plastic (3) are mixed while heated to 150 degrees Celsius, the petroleum resin (12) and liquefied waste plastic for water (11) are mixed while heated to 150 degrees Celsius. The emulsification degree of plastic (3) can be improved.

If sodium hydroxide is added as needed, the petroleum resin (12) and the plastic resin of the liquefied waste plastic (3) can be more easily emulsified in water (11) by the emulsifier (4). Of course, eco-friendliness can be further improved by using a natural emulsifier (5), and the degree of emulsification of the natural emulsifier (5) can be further improved by using octylphenol ethoxylate.

Sodium hydroxide or octylphenol ethoxylate may be first mixed with the emulsifier (4) and then added to the water (11), or may be added to the water (11) together with the emulsifier (4). On the other hand, when the auxiliary resin 8 is used, the auxiliary resin 8 is added to the petroleum resin 12, and when a water-based acrylic emulsion adhesive is used, the water-based acrylic emulsion adhesive is a petroleum resin binder ( 20) is added.

The petroleum resin binder (20) manufactured by mixing water (11), petroleum resin (12), and liquefied waste plastic (3) undergoes a cooling process (S24). The cooling process is a post-treatment process and can help prevent agglomeration or agglomeration between the petroleum resin 12 present as colloidal particles in water 11 and the plastic resin of the liquefied waste plastic 3. The petroleum resin binder 20 can be cooled to room temperature, but is not limited to this and can also be cooled to a temperature below that.

In this way, the mixing process in a heating environment facilitates mixing between water (11), petroleum resin (12), and liquefied waste plastic (3), and the cooling process maintains the dispersed state of petroleum resin (12) and plastic resin. Therefore, the production convenience and quality of the petroleum resin binder 20 can be improved.

Recycled asphalt concrete (15) for road paving is manufactured by stirring the petroleum resin binder (20) and recycled aggregate (10) (S25). Since the stirring process is carried out at room temperature, not only can environmental friendliness be improved, but work convenience can also be improved in that a separate heating and stirring device is not required.

In this way, according to the manufacturing process of the petroleum resin binder 20 and the recycled asphalt concrete 15 according to this embodiment, a more environmentally friendly binder can be manufactured, and the recycled asphalt concrete 15 can be manufactured more easily.

Figure 3 shows an example of an experiment to confirm the degree of reduction of hazardous substances in relation to the petroleum resin binder of Figure 1.

In the case of asphalt binder, harmful gases are mainly generated during mixing by the mixer (14), but in the case of the petroleum resin binder (20) using solid waste plastic (1), in the process of manufacturing liquefied waste plastic (3) Harmful gases are mainly generated.

Hereinafter, with reference to FIG. 3, harmful gases generated in the process of manufacturing the first petroleum resin binder (31) using liquefied waste plastic (3) through room temperature liquefaction treatment and liquefied waste plastic through high temperature melt treatment. (23) is used to compare and explain the harmful gases generated in the process of manufacturing the second petroleum resin binder (32). The high-temperature melting process was performed at 250 degrees Celsius or higher, but it is not limited to this and may be performed at 200 degrees Celsius or higher depending on the performance of the melting device. The harmful gases measured are representative evaporative gases, including ammonia, trimethyl amine, isobutyr aldehyde, valer aldehyde, toluene, xylene, and stillen.

As a result of the analysis, hydrogen chloride, which is fatal to the human body, was not detected in the manufacturing process of the first petroleum resin binder (31), while hydrogen chloride was detected at 0.3 ppm in the manufacturing process of the second petroleum resin binder (31). In addition, isobutyl aldehyde, valeraldehyde, toluene, xylene, and styrene were also detected in large quantities during the manufacturing process of the second petroleum resin binder (31) compared to the manufacturing process of the first petroleum resin binder (31). Of course, even when manufacturing the first petroleum resin binder (31), some harmful gases are generated due to the room temperature reaction between the solid waste plastic (1) and the liquefaction agent (2), but compared to the harmful gases generated during high temperature melt processing, It can be confirmed that it is at a minimal level.

In this way, manufacturing the liquefied waste plastic 3 through room temperature liquefaction of the solid waste plastic 1 can be more environmentally friendly compared to manufacturing the liquefied waste plastic 23 through high temperature melting.

Figure 4 shows an experimental example to confirm the degree of improvement in emulsification by a hydrophilic liquefying agent in relation to the petroleum resin binder of Figure 1.

As shown in Figure 4, in order to confirm the degree of improvement in emulsification, a first petroleum resin binder (31) and a third petroleum resin binder (33) were prepared. The first petroleum resin binder (31) and the third petroleum resin binder (33) are manufactured by mixing water (11), petroleum resin (12), and liquefied plastic (3) through room temperature liquefaction. The resin binder 31 is different in that it uses acetone, a hydrophilic solvent, as a liquefying agent, and the third petroleum resin binder 33 uses benzene, a lipophilic liquefying agent, as a liquefying agent.

To measure the degree of emulsification, 5 ml of each petroleum resin binder was placed in a centrifuge tube, centrifuged at 3000 g for 5 minutes at room temperature, and the degree of emulsification was calculated using the following <formula>.

Degree of emulsification (%) = height of emulsified layer / total height of petroleum resin binder... … … … … <expression>

As a result of the analysis, the degree of emulsification of the first petroleum resin binder (31) using a hydrophilic liquefying agent was confirmed to be 94%, and the degree of emulsification of the third petroleum resin binder (33) using a lipophilic liquefying agent was confirmed to be 86%. In other words, it was confirmed that the emulsification degree of the third petroleum resin binder (33) was approximately 8% lower than that of the first petroleum resin binder (31). Similarly, when sodium hydroxide was added to both sides to improve emulsification, there was a difference in emulsification of about 8%.

As in this experimental example, if a hydrophilic solvent is used during the liquefaction treatment of solid waste plastic (1), the degree of emulsification can be improved compared to when a lipophilic solvent belt is used.

Figure 5 shows an experimental example to confirm the degree of emulsification improvement by natural emulsifiers and emulsification aids in relation to the petroleum resin binder of Figure 1.

As shown in Figure 5, in order to confirm the degree of improvement in emulsification, the first petroleum resin binder 31 and the fourth petroleum resin binder 34 were prepared. The first petroleum resin binder (31) and the fourth petroleum resin binder (34) are manufactured by mixing water (11), petroleum resin (12), and liquefied plastic (3) with a hydrophilic liquefying agent. The difference is that the resin binder 31 uses a natural emulsifier 5, and the fourth petroleum resin binder 34 uses an emulsifier made of organic compounds. The degree of emulsification was measured using the same method as described with reference to Figure 4, and then the degree of emulsification was calculated using the <Formula> in Figure 4.

As a result of the analysis, the emulsification degree of the first petroleum resin binder (31) using a natural emulsifier (5) was confirmed to be 94%, and the emulsification degree of the fourth petroleum resin binder (34) using an organic compound emulsifier was confirmed to be 98%. In other words, it was confirmed that the emulsification degree of the first petroleum resin binder (31) was approximately 4% lower than that of the fourth petroleum resin binder (34). Similarly, when sodium hydroxide was added to both sides to improve emulsification, there was a difference in emulsification of about 4%.

However, when the emulsification aid (6) is added to the first petroleum resin binder (31) to improve the emulsification power of the natural emulsifier (5), the emulsification degree of the first petroleum resin binder (31) is lowered to the fourth petroleum resin binder (34). ) can be improved to the point where it corresponds to For example, when the natural emulsifier (5) is G5000, the emulsification aid (6) may be octylphenol ethoxylate.

As in this experimental example, using a natural emulsifier (5) is effective in improving environmental friendliness, but has the disadvantage of lowering the degree of emulsification. However, if the emulsification aid (6) is used appropriately, the decreased degree of emulsification is compensated for. As a result, it is possible to provide a petroleum resin binder (20) that achieves both improved eco-friendliness and improved emulsification.

Figure 6 shows a composition of a petroleum resin binder and recycled asphalt concrete according to another embodiment of the present invention.

In this embodiment, when manufacturing the petroleum resin binder 20, a plurality of liquefied waste plastics 42 and 52, respectively liquefied from a plurality of solid waste plastics 41 and 42, can be used. Plastic resins of the plurality of solid waste plastics 41 and 42 or the plurality of liquefied waste plastics 42 and 52 may be of different types. For example, the first solid waste plastic 41 and the first liquefied waste plastic 42 may be PVC, and the second solid waste plastic 51 and the second liquefied waste plastic 52 may be PE. .

When using a plurality of liquefied waste plastics (42, 52), a plurality of emulsifiers (43, 53) are used to emulsify the plurality of liquefied waste plastics (42, 52) with water (11). As an example, a first emulsifier 43 that is advantageous in improving the degree of emulsification of the first liquefied waste plastic 42 and a second emulsifier 53 that is advantageous in improving the degree of emulsification of the second liquefied waste plastic 52 may be used.

As described with reference to FIG. 1, a plurality of liquefied waste plastics 42, 52 are first mixed with the petroleum resin 12, and then the mixed petroleum resin 12 and a plurality of liquefied waste plastics 42, 52 are mixed into the petroleum resin 12. A petroleum resin binder (20) can be produced by mixing water (11) with emulsifiers (43, 53), and in this process, emulsification aids (6) such as sodium hydroxide are added to improve the degree of emulsification. You may.

In this way, when manufacturing the petroleum resin binder (20), using a plurality of various types of liquefied waste plastic (42, 52) allows recycling of a large amount of various types of waste plastic compared to the case of using a single type of liquefied waste plastic (3). Therefore, it can be more helpful in improving eco-friendliness through recycling.

In addition, despite adding a plurality of liquefied waste plastics 42 and 52, if a single type of emulsifier 4 is used, the emulsification degree of the plurality of liquefied waste plastics 42 and 52 in water 11 may be reduced. However, since a plurality of emulsifiers 43 and 53 corresponding to the plurality of liquefied waste plastics 42 and 52 are used, the degree of emulsification of the plurality of liquefied waste plastics 42 and 52 with respect to the water 11 is reduced. It can be prevented.

According to various embodiments, when manufacturing the petroleum resin binder 20, the recycled aggregate 10 coated with the first molten waste plastic 62 can be used. The first melted waste plastic 62 may be prepared by high-temperature melting the third solid waste plastic 61. The third solid waste plastic 61 may be of the same type or different from the plurality of solid waste plastics 41 and 42 described above.

When the high-temperature melt treatment is 200 degrees Celsius or higher, a large amount of toxic gas may be generated, so the high-temperature melt treatment may be performed on the third solid waste plastic 61 whose heat distortion temperature is less than 200 degrees Celsius. The heat deflection temperature refers to the temperature at which transformation from a solid state to a liquid state begins. As the third solid waste plastic (61), PVF (poly vinyl fluoride) and PVDC (poly vinylidene chloride) have a heat deflection temperature of 100 to 200 degrees Celsius. ), etc., or PVC, ABS, polystyrene, polyethylene, etc. with a heat distortion temperature of less than 100 degrees Celsius can be used.

After the first molten waste plastic 62 is coated on the surface of the recycled aggregate 10, a cooling process is performed to maintain the coating state. Through the cooling process, the first molten waste plastic 62 becomes solid, and if it is not heated to the heat deformation temperature, it can remain in a solid state while being coated on the surface of the recycled aggregate 10.

The recycled aggregate (10) coated with the first molten waste plastic (62) can be mixed with the petroleum resin binder (20) to produce recycled asphalt concrete (15). Here, the petroleum resin binder 10 may use a single liquefied waste plastic 3 or a plurality of heterogeneous liquefied waste plastics 42 and 52, as described in detail above.

The mixing process is carried out in a heated environment to facilitate easy mixing between the petroleum resin binder (20) and the coated recycled aggregate (10), and to prevent thermal deformation of the first molten waste plastic (62) coated on the recycled aggregate (10). It is preferable to proceed below the heat distortion temperature.

In this way, when the recycled aggregate 10 coated with the first molten waste plastic 62 is used, a single liquefied waste plastic 3 or a plurality of liquefied waste plastics 42 and 52 are added to the petroleum resin 12. Compared to recycling waste plastics, a large variety of waste plastics can be utilized, so eco-friendliness can be further improved through recycling of waste plastics.

According to various embodiments, a plurality of heterogeneous molten waste plastics 62 and 72 may be coated on the recycled aggregate 10. The plurality of melted waste plastics 62 and 72 may be prepared by high-temperature melting of a plurality of solid waste plastics 61 and 71 having different heat distortion temperatures. As an example, the first molten waste plastic 62 from the third solid waste plastic 61, which has a heat distortion temperature of 100 to 200 degrees Celsius, is first coated on the recycled aggregate 10, and a cooling process is performed to maintain the coating state. It's rough. After the cooling process for the recycled aggregate (10) primarily coated with the first molten waste plastic (62) is completed, the second molten waste plastic (71) from the fourth solid waste plastic (71) with a heat distortion temperature of less than 100 degrees Celsius is 62) is secondarily coated on the recycled aggregate 10, which was first coated with the first molten waste plastic 62. The second molten waste plastic 62 may undergo a cooling process so that it can remain coated on the first molten waste plastic 62.

If the second melt waste plastic 62 with a low heat distortion temperature is first coated on the recycled aggregate 10, and the first melt waste plastic 62 with a high heat distortion temperature is secondarily coated, the second melt Since the waste plastic 62 causes thermal deformation and cannot maintain its coating state, the first molten waste plastic 62, which has a high heat deformation temperature, is coated first, and the second molten waste plastic 62, which has a low heat deformation temperature, is coated first. It is preferable to coat later.

In this way, when the recycled aggregate 10 coated with the first molten waste plastic 62 and the second molten waste plastic 62 is used, the recycled aggregate 100 coated with a single first molten waste plastic 62 ), compared to the case of using a large amount of waste plastic, it is possible to further improve eco-friendliness through recycling of waste plastic.

Above, the present invention has been described in detail through preferred embodiments, but the present invention is not limited thereto and may be implemented in various ways within the scope of the patent claims.

1: Solid waste plastic
2: Liquefaction agent
3: Liquefied waste plastic
4: Emulsifier
5: Natural emulsifier
6: Emulsifying aids
7: Additives
8: Auxiliary resin
10: Recycled aggregate
11: water
12; petroleum balance
13: Mixing device
14: mixer
15; recycled asphalt

Claims (5)

In the petroleum resin binder applied to recycled aggregate for the subbase,
water;
petroleum resin;
waste plastic;
A liquefying agent for liquefying the waste plastic; and
Contains an emulsifier for emulsification between the water, the petroleum resin, and the liquefied waste plastic,
A petroleum resin binder in which the petroleum resin and the liquefied waste plastic exist as colloidal particles in the water. According to paragraph 1,
The liquefying agent is a petroleum resin binder containing a hydrophilic solvent. According to paragraph 2,
A petroleum resin binder containing sodium hydroxide that increases emulsification between the water, the petroleum resin, and the liquefied waste plastic by the emulsifier. According to paragraph 1,
A petroleum resin binder manufactured from 30 to 80 parts by weight of the water, 20 to 70 parts by weight of the petroleum resin, 20 to 50 parts by weight of the liquefied waste plastic, 10 to 15 parts by weight of the liquefaction agent, and 0.5 to 10 parts by weight of the emulsifier. In the method of manufacturing recycled asphalt using recycled aggregate for subbase,
Mixing two or more different types of liquefied waste plastic with petroleum resin;
Mixing the mixed petroleum resin and the two or more liquefied waste plastics in water with an emulsifier to produce a petroleum resin binder; and
A method of manufacturing recycled asphalt concrete comprising the step of mixing recycled aggregate coated with at least one molten waste plastic and the produced petroleum resin binder to produce recycled asphalt concrete.

Images