KR20230085399A - Petroleum resin binder applied to recycled aggregate for auxiliary base layer - Google Patents

Abstract

The present invention relates to a petroleum resin binder applied to recycled aggregate for an auxiliary base layer, which includes water, petroleum resin, an emulsifier for emulsification between water and petroleum resin, and sodium hydroxide to increase the solubility of the emulsifier in water, wherein the petroleum resin is water It relates to a petroleum resin binder that exists as colloidal particles in

Description

Petroleum resin binder applied to recycled aggregate for auxiliary base layer

The present invention relates to a petroleum resin binder applied to recycled aggregate for an auxiliary base layer.

Recycled aggregate is a product obtained by crushing waste asphalt concrete and construction waste, and is widely recycled for subbase road pavement. In the case of recycled aggregate obtained from waste asphalt, due to the aging of the previously applied asphalt, the physical properties required for subbase layer are generally lowered, and there is a concern that toxic substances and environmental hormones flowing out from the aged asphalt may contaminate groundwater and leachate. Therefore, it is applied as a binder and recycled for physical property recovery and environmental improvement.

Although asphalt is used as a binder, it is pointed out that it rather accelerates environmental pollution due to the large amount of organic compounds due to the nature of asphalt components. Recently, molten petroleum resin is mixed with recycled aggregate and recycled aggregate coated with petroleum resin is used. Thus, there has been an attempt to create an environmentally friendly road pavement environment in contrast to the asphalt binder.

However, because the petroleum resin applied to the recycled aggregate has to be transported to the road pavement site before it hardens and the compaction process must be completed, there are considerable restrictions on temperature management. The frequency of use is decreasing.

Therefore, there is an increasing demand for a petroleum resin binder based on petroleum resin, which is environmentally friendly, easy to use because temperature control is not difficult, and can be easily utilized in road pavement work.

Accordingly, an object of the present invention is to provide a petroleum resin binder that is convenient to use and easy to utilize as a petroleum resin binder applied to recycled aggregate for auxiliary base layer.

The above object of the present invention, in the petroleum resin binder applied to the recycled aggregate for the auxiliary base layer, water; petroleum resin; an emulsifier for emulsification between the water and the petroleum resin; and sodium hydroxide to increase the solubility of the emulsifier in water, and the petroleum resin may be achieved by a petroleum resin binder present in the form of colloidal particles in the water.

According to this, since it can be mixed with recycled aggregate at room temperature, it is possible to provide a petroleum resin binder that is convenient to use and easy to utilize.

The petroleum resin binder is composed of 30 to 80 parts by weight of the water, 0.1 to 0.5 parts by weight of the emulsifier, 0.1 to 1.0 parts by weight of the sodium hydroxide, and 20 to 70 parts by weight of the petroleum resin.

According to this, it is possible to provide a petroleum resin binder with improved usability and usability.

The petroleum resin binder further includes the emulsifier of the natural resin component and octylphenol ethoxylate for increasing the emulsification degree between the water and the petroleum resin by the emulsifier of the natural resin component, and 30 to 80 parts by weight of the water , 0.1 to 0.5 parts by weight of the emulsifier of the natural resin component, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, and 0.1/3 to 0.5/3 parts by weight of the octylphenol ethoxylate.

According to this, it is possible to provide a petroleum resin binder that is environmentally friendly compared to the case of using an organic compound emulsifier and has a further improved emulsification degree between water and petroleum resin.

The petroleum resin binder further includes an anti-peeling agent for preventing peeling of the petroleum resin to the recycled aggregate and an aqueous acrylic emulsion adhesive for increasing adhesion of the petroleum resin to the recycled aggregate, and 30 to 80% by weight of the water part, 0.1 to 0.5 parts by weight of the emulsifier of the natural resin component, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, 0.1/3 to 0.5/3 parts by weight of the octylphenol ethoxylate, the exfoliation It consists of 0.1 to 3.0 parts by weight of the inhibitor and 0.1 to 3.0 of the aqueous acrylic emulsion adhesive.

According to this, it is possible to provide a petroleum resin binder with improved adhesion and tackiness of the petroleum resin to the recycled aggregate.

The petroleum resin binder further includes at least one of polyisobutylene, rosin, or rosin ester for increasing the adhesion of the petroleum resin to the recycled aggregate, and 30 to 80 parts by weight of the water, an emulsifier of the natural resin component 0.1 to 0.5 parts by weight, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, 0.1/3 to 0.5/3 parts by weight of the octylphenol ethoxylate, 0.1 to 3.0 parts by weight of the anti-peeling agent, the It is composed of 0.1 to 3.0 parts by weight of an aqueous acrylic emulsion adhesive and 1 to 30 parts by weight of at least one of the polyisobutylene, rosin or rosin ester.

According to this, it is possible to provide a petroleum resin binder with further improved adhesion and tackiness of the petroleum resin to the recycled aggregate.

According to the present invention, since the petroleum resin exists as colloidal particles in water and can be mixed with recycled aggregate at room temperature, it is possible to provide a petroleum resin binder that is convenient to use and easy to utilize.

1 shows a composition of a petroleum resin binder and a manufacturing process of recycled asphalt concrete according to an embodiment of the present invention.
Figure 2 shows an example of the manufacturing sequence of the petroleum resin binder of Figure 1.
Figure 3 shows an experimental example for confirming the degree of improvement in emulsification by the emulsifier and octylphenol ethoxylate of the natural resin component of Figure 1.
Figure 4 shows an experimental example for confirming the degree of reduction of harmful substances by the emulsifier and octylphenol ethoxylate of the natural resin component of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. This is to explain in detail to the extent that those skilled in the art can easily practice the invention, and thus, the technical spirit and scope of the present invention are not limited. .

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

The petroleum resin binder 1 according to the present embodiment is a mixed solution applied to the recycled aggregate 10 to enable recycling of the recycled aggregate 10 as recycled asphalt concrete 12 for subbase. Here, the subbase layer is one component of a plurality of layers constituting the paved road, and is located in the middle of the base layer and the roadway. The subbase layer disperses the traffic load transmitted from the upper layer, the surface layer and the base layer, and transmits it to the subgrade, and prevents fine particles of subgrade soil from penetrating into the base layer. In addition, it serves as a waterproof layer to prevent the penetration and accumulation of moisture 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 the recycled asphalt concrete 12 for the subbase layer and is not recycled, it can be recycled for the surface layer and the base layer, etc., depending on circumstances.

The recycled aggregate 10 is obtained by crushing waste asphalt concrete, construction waste, and the like. In particular, in the case of recycled aggregate 10 crushed from waste asphalt concrete, physical properties required for auxiliary base layer are deteriorated due to oxidation by oxygen in the air for a long period of time, molecular cutting by ultraviolet rays, and drying due to asphalt evaporation, etc. need to be supplemented

In addition, when the recycled aggregate 10 crushed from waste asphalt concrete is used as it is, a large amount of environmental hormone such as benzopyrene flows out from the aged asphalt remaining on the surface of the recycled aggregate 10. When domestic water is polluted or air is polluted by wind, it seriously results in curing a large number of cancer patients in nearby residences, so it is necessary to block environmental pollutants.

Therefore, due to the reasons for restoring performance and improving the environment, recycled aggregate 10 is applied as a binder and recycled for road pavement for sub-base layer. However, although asphalt binders are helpful in restoring performance, toxic substances such as carbon monoxide (CO) and hydrogen sulfide (H ₂ S) are emitted during the manufacturing and management process. There is still a risk of environmental hormone leakage.

In order to overcome the harmfulness of the asphalt binder, a simple attempt to mix solid or semi-solid petroleum resin (3) and recycled aggregate (10) in a high-temperature environment and apply the petroleum resin (3)-coated recycled aggregate (10) to road pavement. There was an attempt of a heating mixing method. However, due to temperature constraints in which the transport process, the burial process, the compaction process, etc. must be completed before the heated recycled aggregate 10 is cooled or the applied petroleum resin 3 hardens, the simple heating and mixing method is convenient for use and usability is poor.

On the other hand, since the petroleum resin binder 1 according to the present embodiment uses an environmentally friendly petroleum resin 3 compared to an asphalt binder, and the petroleum resin 3 is dispersed in water 2 as colloidal particles, It can be mixed with recycled aggregate 10 at room temperature, and is not constrained by temperature constraints compared to a simple heating and mixing method using petroleum resin 3. That is, the ease of use and utilization are superior to the simple heating and mixing method.

Hereinafter, with reference to FIG. 1, the composition and manufacturing process of the petroleum resin binder 1 described above will be described in more detail.

The petroleum resin binder (1) is prepared by mixing water (2) and petroleum resin (3). Water 2 is a dispersion medium for the petroleum resin 3, and may have a neutral pH of 7 so that the petroleum resin binder 1 can be more easily prepared. Water 2 may be purified water, distilled water, or the like.

Petroleum resin (3) is a dispersant that is dispersed in water (2) and exists as colloidal particles. Petroleum resin (3) is an oil component obtained as a by-product of petroleum refining or petrochemical industry, and uses one containing olefin or di-olefin as a raw material. As the petroleum resin 3, an aromatic or aliphatic resin may be used, or a combination thereof may be used. For example, the petroleum resin 3 includes HIKOTACK® P-90 from KOLON INDUSTRIES ^TM . HIKOTACK® P-90 is an aromatic C9 petroleum resin, a pale yellow thermoplastic resin obtained through polymerization of aromatic olefins generated in the naphtha pyrolysis process.

The petroleum resin 3 coats the surface of the recycled aggregate 10 so that the recycled aggregate 10 has physical properties for the auxiliary base layer to improve strength, abrasion resistance, erosion resistance, durability, adhesiveness, tackiness, etc. . In addition, by covering the aged surface and asphalt of the recycled aggregate 10, environmental pollutants that may flow out therefrom are fundamentally blocked.

The petroleum resin binder (1) includes an emulsifier (4). The emulsifier (4) may be an anionic emulsifier used for emulsification between water (2) and petroleum resin (3). For example, fatty acid salts, carbonic acid salts, sulfate ester salts, sulfonic acid salts, phosphoric acid ester salts, SS-1, SS-1H, etc. may be used as the emulsifier (4).

The petroleum resin binder (1) includes sodium hydroxide (5). Sodium hydroxide (5) serves to increase the solubility of the emulsifier (4) in water (2). For example, sodium hydroxide (5) induces the emulsifier (4) to have an anion, so that the emulsifier (4) has a higher solubility in water (2). When the solubility of the emulsifier (4) in water (2) increases, the emulsification degree between the water (2) and the petroleum resin (3) is improved, and the aggregation of the petroleum resin (3) present as colloidal particles in the water (2) It can help prevent the phenomenon and maintain the dispersed state.

As such, the petroleum resin binder 1 according to the present embodiment is not only environmentally friendly compared to the case of using asphalt in that the petroleum resin 3 is used, but is also dispersed in water 2 and exists as colloidal particles, Since it can be mixed with the recycled aggregate 10 at room temperature, it is convenient to use and can be easily utilized compared to the simple heating and mixing method.

According to one embodiment, the emulsifier 4 includes an emulsifier 40 of a natural resin component. The natural resin component may be extracted from natural trees or natural resins. For example, it may be manufactured based on a resin extracted from a copaiba tree, a carnauba palm tree, a brazil nut tree, etc., but is not limited thereto, and is thus extracted from various forests in the tropics. It may be manufactured based on the prepared resin.

The natural resin-based emulsifier 40 has excellent eco-friendliness and biocompatibility compared to organic compound-based emulsifiers, and has high solubility in water 2, so it is easily diluted in water 2 even at room temperature. When sodium hydroxide (5) is used together or liquid emulsifier (4) is prepared through liquid treatment of natural resin components, the solubility and dilution of the natural resin component emulsifier (40) in water (2) is further improved. can be improved

As the emulsifier 40 for the natural resin component, emulsifen G5000 manufactured by POLYTRADE ^TM may be used. G5000 is not only more eco-friendly than organic compound emulsifiers because it has less impact on the soil ecosystem, but also has high cost efficiency because the manufacturing cost is not high. G5000 is used alone, but may be used together with octylphenol ethoxylate (6) described below to improve the emulsifying power. The emulsification degree in the case of using G5000 and the supplementation of the emulsification degree by octylphenol ethoxylate (6) will be described in detail with reference to FIG. 3 .

In this way, in manufacturing the petroleum resin binder 1 applied to the recycled aggregate 10, when the natural resin component emulsifier 40 is used, compared to the case of using an organic compound component emulsifier, eco-friendliness and biocompatibility are improved. can be improved further.

According to one embodiment, the petroleum resin binder 1 includes octylphenol ethoxylate (6). Octylphenol ethoxylate (6) improves the degree of emulsification between water (2) and petroleum resin (3) by the emulsifier (4). In particular, it may be effective to further improve the emulsification degree of the natural resin component by the emulsifier 40. As the octylphenol ethoxylate (6), a product (e.g. X-405) of HLB 17.6 from TRITON ^™ may be used.

As described above, since the solubility of the emulsifier (4) in water (2) can be adjusted with sodium hydroxide (5) to improve the emulsification degree, octylphenol ethoxylate (6) and sodium hydroxide are used to improve the emulsification degree. (5) can also be used together.

In this way, in manufacturing the petroleum resin binder (1) applied to the recycled aggregate (10), when octylphenol ethoxylate (6) is added, water (2) and petroleum resin (3) by the emulsifier (4) The emulsification degree of the liver can be more easily improved.

According to one embodiment, the petroleum resin binder 1 may include an anti-peeling agent 7. When moisture evaporates after the petroleum resin binder 1 is applied to the recycled aggregate 10, the petroleum resin 3 remains coated on the recycled aggregate 10. However, when moisture evaporates, the petroleum resin 3 may peel off from the surface of the recycled aggregate 10, and the anti-peeling agent 7 serves to prevent this peeling phenomenon. Exfoliation may also occur due to deterioration of the petroleum resin 3 over time, and the anti-exfoliation agent 7 may also prevent exfoliation in this case.

The anti-peeling agent 7 is preferably made of a component resistant to heat. For example, the anti-stripping agent 7 is an anionic anti-stripping agent and includes a fatty acid type, a linear alkyl benzene type, an alpha olefin type, a normal paraffin type, and the like. Fatty acids include fatty acid salts, alpha sulfonated fatty acid ester salts, and the like, and straight-chain alkylbenzene salts include straight-chain alkylbenzene sulfonates. Alpha olefins and normal paraffins include alpha olefin sulfonates and alkyl sulfonates.

According to one embodiment, the petroleum resin binder 1 includes an aqueous acrylic emulsion adhesive 8. A water-based acrylic emulsion adhesive (8) is used to improve adhesion between recycled aggregates (10) by petroleum resin (3).

The water-based acrylic emulsion adhesive (8) has acrylic as its main component, styrene monomer used as an adhesive strength modifier, and N-methylol acrylamide monomer used as a heat resistance imparting agent. By crosslinking with acrylic acid, surface adhesion of the petroleum resin 3 to the recycled aggregate 10 is improved, and water resistance, abrasion resistance, light resistance, elasticity resistance, fire resistance, chemical resistance, sound insulation, heat insulation, etc. are improved by the adhesive strength. can make it

According to one embodiment, the petroleum resin binder 1 includes an auxiliary resin 9 for improving adhesion. Auxiliary resin 9 for improving adhesion is for improving adhesion between recycled aggregates 10 by petroleum resin 3, and includes at least one of polyisobutylene, rosin, and rosin ester. contains one

However, since the emulsifier 40 of the natural resin component can also perform the function of improving adhesion, when the required adhesiveness is achieved only by the emulsifier 40 of the natural resin component according to the road pavement environment, the auxiliary resin for improving the adhesiveness ( 9) may be omitted.

In this way, when the water-based acrylic emulsion adhesive 8 and the auxiliary resin 9 are used, the adhesiveness and tackiness of the petroleum resin 3 can be further improved.

The mixing process between the water 2 into which the above additives are added and the petroleum resin 3 may be performed at high speed by a mixing device 13 such as a colloid mill. Through the mixing process, the petroleum resin 3 exists as colloidal particles having an average particle diameter of 1 to 5 μm. During the mixing process, an electric charge is applied to the surface of the petroleum resin 3, so that aggregation 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, or the like may be used in addition to or together with the colloid mill.

The mixer 11 stirs the petroleum resin binder 1 and the recycled aggregate 10 prepared through the manufacturing process as described above. The stirring process may be performed at room temperature, and through the stirring process, the recycled aggregate 10 is applied by the petroleum resin binder 1. When the recycled aggregate 10 is applied by the petroleum resin binder 1, the recycled asphalt concrete 12 that can be used for road paving such as for subbase layer is finally prepared.

In order for the recycled aggregate 10 to be recycled as recycled asphalt concrete 12 for the auxiliary base layer, it must satisfy the particle size according to the standard specification, which is the quality standard for the auxiliary base layer. However, depending on the manufacturing environment of the recycled aggregate 10, the particle size range of the recycled aggregate 10 is somewhat wide between 0.08 mm and 75 mm, so it may be difficult to satisfy the quality standards for the auxiliary base layer. In this case, by appropriately mixing the recycled aggregate 10 prepared for each particle size of at least three or more types, it is possible to satisfy the quality standard.

Hereinafter, the mixing ratio of each raw material for manufacturing the petroleum resin binder 1 will be described in detail. The petroleum resin binder (1) is composed of 30 to 80 parts by weight of water (2), 0.1 to 0.5 parts by weight of emulsifier (4), 0.1 to 1.0 parts by weight of sodium hydroxide (5), and 20 to 70 parts by weight of petroleum resin (3). It consists of

If the amount of water (2) is less than 30 parts by weight, the concentration of various additives such as the emulsifier (4) and the petroleum resin (3) increases, making it difficult to manufacture the petroleum resin binder (1). On the other hand, if the amount of water (2) is greater than 80 parts by weight, the concentration of various additives such as the emulsifier (4) is diluted, and the intended effects may not be obtained through the additives. For example, the degree of emulsification by the emulsifier 4 may decrease or the solubility of the emulsifier 4 in water 2 may decrease.

If the emulsifier (4) is less than 0.1 parts by weight, the curing period of the petroleum resin binder (1) may be delayed, and if it is greater than 0.5 parts by weight, phase separation between water (2) and petroleum resin (3) may occur. there is.

If the amount of sodium hydroxide (5) is less than 0.1 part by weight, the solubility of the emulsifier (4) in water (2) is not sufficient, and the curing period of the petroleum resin binder (1) may be delayed, and if it is greater than 1.0 part by weight, the curing period of the petroleum resin binder (1) may be delayed. , phase separation between the water (2) and the petroleum resin (3) may occur.

If the petroleum resin 3 is less than 20 parts by weight, the strength of the recycled aggregate 10 may be lowered, and if it is greater than 70 parts by weight, the strength may be too strengthened and cracks may occur in the recycled aggregate 10. there is.

According to such a mixing ratio, it is possible to provide a petroleum resin binder 1 with improved usability and usability.

According to one embodiment, the petroleum resin binder (1) includes 30 to 80 parts by weight of water (2), 0.1 to 0.5 parts by weight of an emulsifier 40 of a natural resin component, 0.1 to 1.0 parts by weight of sodium hydroxide (5), petroleum It is composed of 20 to 70 parts by weight of resin (3) and 0.1/3 to 0.5/3 parts by weight of octylphenol ethoxylate.

The reason why water 2 and the like should be configured in an optimal ratio according to the present embodiment overlaps with the previously described content, so it will be omitted.

If the emulsifier 40 of the natural resin component is less than 0.1 parts by weight, the curing period of the petroleum resin binder 1 may be delayed, and if it is greater than 0.5 parts by weight, phase separation between the water 2 and the petroleum resin 3 phenomena may occur.

If the amount of octylphenol ethoxylate (6) is less than 0.1/3 parts by weight, the emulsification degree of the natural resin component by the emulsifier (4) cannot be sufficiently improved, and the curing period of the petroleum resin binder (1) may be delayed If it is greater than 0.5/3 parts by weight, the emulsification degree is excessively improved, and phase separation between the water (2) and the petroleum resin (3) may occur.

According to such a mixing ratio, it is possible to provide a petroleum resin binder 1 with further improved eco-friendliness and emulsification.

According to one embodiment, the petroleum resin binder (1) contains water (2), natural resin emulsifier (40), sodium hydroxide (5), petroleum resin (3) and octylphenol ethoxylate (6). With respect to the above mixing ratio, it consists of 0.1 to 3.0 parts by weight of an anti-peeling agent (7) and 0.1 to 3.0 parts by weight of an aqueous acrylic emulsion adhesive (8).

If the anti-stripping agent 7 is less than 0.1 parts by weight, the petroleum resin 3 is easily peeled off from the surface of the recycled aggregate 10, and if it is greater than 3.0 parts by weight, the durability of the anti-stripping effect may deteriorate.

If the amount of the water-based acrylic emulsion adhesive 8 is less than 0.1 parts by weight, the strength of the recycled aggregate 10 may be lowered, and if the amount of the water-based acrylic emulsion adhesive 8 is greater than 3.0 parts by weight, the strength or the like may be too strengthened and the cycle Cracks may occur in the aggregate 10 .

According to such a mixing ratio, it is possible to provide the petroleum resin binder 1 with improved adhesion and tackiness of the petroleum resin 3 to the recycled aggregate 10.

According to one embodiment, the petroleum resin binder (1) is water (2), natural resin emulsifier (40), sodium hydroxide (5), petroleum resin (3), octylphenol ethoxylate (6), exfoliation With respect to the above mixing ratio for the inhibitor (7) and the water-based acrylic emulsion adhesive (8), the auxiliary resin (9) is composed of 1 to 30 parts by weight.

If the amount of the auxiliary resin 9 is less than 1 part by weight, the strength of the recycled aggregate 10 may decrease, and if the amount of the auxiliary resin 9 for improving adhesion is greater than 30 parts by weight, the strength and the like may be too strengthened and circulated. Cracks may occur in the aggregate 10 .

According to one embodiment, the ratio of the recycled aggregate 10 and the petroleum resin binder 1 may be 10 to 70 parts by weight of the petroleum resin binder 1 with respect to 30 to 90 parts by weight of the recycled aggregate 10.

Figure 2 shows an example of the manufacturing sequence of the petroleum resin binder of Figure 1.

As shown in FIG. 2, an emulsifier (4) and sodium hydroxide (5) are added to water (2) (S21). The emulsifier (4) and sodium hydroxide (5) are for facilitating emulsification of the petroleum resin (3) with respect to water (2). Eco-friendliness can be further improved by the use of the natural resin emulsifier 40, and the emulsification degree of the natural resin emulsifier 40 can be further improved by the use of the octylphenol ethoxylate 6. Of course, an anti-peeling agent 7 for improving the physical properties of the petroleum resin binder 1 may also be added.

Sodium hydroxide (5) or octylphenol ethoxylate (6) is first mixed with the emulsifier (4) and then added to the water (2), or is added to the water (2) together with the emulsifier (4).

On the other hand, when the auxiliary resin 9 is used, the auxiliary resin 9 is added to the petroleum resin 3. In addition, when the water-based acrylic emulsion adhesive 8 is used, the water-based acrylic emulsion adhesive 8 is added to the petroleum resin binder 1 produced in the mixing process.

The petroleum resin binder 1 is produced by mixing water 2 and petroleum resin 3 in a heating environment (S22). Mixing in a heating environment may mean mixing in a state where the water 2 is heated to 50 degrees Celsius and the petroleum resin 3 is heated to 150 degrees Celsius, respectively. When the petroleum resin (3) is HIKOTACK® P-90, since HIKOTACK® P-90 can be provided in a solid state such as granules or pellets, it is heated to 150 degrees Celsius to melt into a semi-solid or liquid state, mixed with water (2). Water (2) can also be used within 90 degrees Celsius.

The petroleum resin binder 1 produced by mixing water 2 and petroleum resin 3 in a heating environment undergoes a cooling process (S23). The cooling process is a post-treatment process and can help prevent aggregation between the petroleum resins 3 existing as colloidal particles in the water 2 . It may be cooled to room temperature, but is not limited thereto, and may be cooled to a temperature below that.

According to this, the heating environment facilitates mixing between the water 2 and the petroleum resin 3, and the cooling process maintains the dispersion state of the petroleum resin 3, so production convenience for the petroleum resin binder 1 and quality can be improved.

Figure 3 shows an experimental example for confirming the degree of improvement in emulsification by the emulsifier and octylphenol ethoxylate of the natural resin component of Figure 1.

As shown in Table 1 (21) of FIG. 3, in order to confirm the degree of improvement in emulsification, a first petroleum resin binder, a second petroleum resin binder, and a third petroleum resin binder were prepared. The first petroleum resin binder is prepared by mixing water (2), petroleum resin (3), natural resin emulsifier (40), sodium hydroxide (5) and octylphenol ethoxylate (6). The mixing ratio may be as described with reference to FIG. 1 .

The second petroleum resin binder is obtained by excluding octylphenol ethoxylate (6) from the first petroleum resin binder, and is composed of water (2), petroleum resin (3), natural resin emulsifier (40) and sodium hydroxide (5). it is manufactured The mixing ratio may be as described with reference to FIG. 1 .

The third petroleum resin binder replaces the natural resin emulsifier 40 with an organic compound emulsifier in the second petroleum resin binder, and includes water (2), petroleum resin (3), an organic compound emulsifier and sodium hydroxide. It is prepared by (5). For ease of experimentation, a comparative emulsifier was sodium dothecylsulfate, which is widely used as an anionic emulsifier. The mixing ratio may be as described with reference to FIG. 1 .

In the emulsification measurement method, 5 ml of each petroleum resin binder was placed in a centrifugal separation tube, centrifuged at 3000 g for 5 minutes at room temperature, and then the emulsification degree was calculated by the following <Equation>.

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

As shown in Table 2 (22), the emulsification degree of the second petroleum resin binder using the emulsifier 40 of natural resin component is 91%, and the emulsification degree of the third petroleum resin binder using the emulsifier of organic compound component is 94% The emulsification rate is about 3% lower than that of

However, while octylphenol ethoxylate (6) is not added to the second petroleum resin binder, octylphenol ethoxylate (6) is added together with the natural resin emulsifier (40) Of the first petroleum resin binder The emulsification degree was measured as 94%, and the emulsification degree of the third petroleum resin binder was confirmed to be the same level as 94%.

As such, if only the natural resin component emulsifier 40 is used, the emulsification degree may be slightly lower than that of the organic compound component emulsifier, but when octylphenol ethoxylate 6 is used together, the natural resin component emulsifier Since it complements the emulsification degree of (40), it can have an emulsification degree corresponding to the case of using an emulsifier of an organic compound component.

Figure 4 shows an experimental example for confirming the degree of reduction of harmful substances by the emulsifier and octylphenol ethoxylate of the natural resin component of FIG.

When using recycled aggregate 10 crushed from waste asphalt concrete, harmful substances in the process of manufacturing recycled asphalt concrete 12 are mainly mixed with petroleum resin binder 1 and recycled aggregate 10 by mixer 11 It is an organic evaporation gas generated during the process. In particular, when organic compounds such as waste asphalt are not completely removed from the recycled aggregate 10, the amount of organic evaporation gas may be further increased.

Therefore, by analyzing the organic evaporation gas generated in the process of mixing each of the first petroleum resin binder, the second petroleum resin binder, and the third petroleum resin binder described with reference to FIG. 3 with the same recycled aggregate 10, It is shown in Table 3 (31).

The measured harmful evaporative gases were ammonia, trimethyl amine, isobutyl aldehyde, valer aldehyde, toluene, xylene and styrene.

As a result of the analysis, when using the first petroleum resin binder as shown in Table 3 (31), ammonia, trimethylamine, isobutyl aldehyde, valeraldehyde, toluene, xylene and styrene were all reduced compared to the case of using the third petroleum resin binder. . In particular, in the case of using the first petroleum resin binder, it can be confirmed that most of the organic evaporation gas is reduced compared to the second petroleum resin binder that does not use octylphenol ethoxylate (6).

In this way, when octylphenol ethoxylate (6) is used together with the natural resin emulsifier (40), it is possible not only to use an emulsifier of an existing organic compound component, but also to avoid using octylphenol ethoxylate (6). In contrast, an environmentally friendly and biocompatible petroleum resin binder 1 can be provided.

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

1: petroleum resin binder
2: water
3: petroleum balance
4: emulsifier
5: sodium hydroxide
6: octylphenol ethoxylate
7: anti-stripping agent
8: water-based acrylic emulsion adhesive
9: Auxiliary resin for improving adhesion
10: recycled aggregate
11: mixer
12: Regeneration Ascon
13: mixing device
40: natural resin emulsifier

Claims (5)

In the petroleum resin binder applied to the recycled aggregate for the auxiliary base layer,
water;
petroleum resin;
an emulsifier for emulsification between the water and the petroleum resin; and
Contains sodium hydroxide to increase the solubility of the emulsifier in water;
The petroleum resin is a petroleum resin binder present in the water as colloidal particles. According to claim 1,
A petroleum resin binder composed of 30 to 80 parts by weight of the water, 0.1 to 0.5 parts by weight of the emulsifier, 0.1 to 1.0 parts by weight of the sodium hydroxide, and 20 to 70 parts by weight of the petroleum resin. According to claim 1,
Further comprising the emulsifier of the natural resin component and octylphenol ethoxylate to increase the emulsification degree between the water and the petroleum resin by the emulsifier of the natural resin component,
30 to 80 parts by weight of the water, 0.1 to 0.5 parts by weight of the emulsifier of the natural resin component, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, and 0.1/3 to 0.5 parts by weight of the octylphenol ethoxylate A petroleum resin binder composed of 3 parts by weight. According to claim 3,
Further comprising an anti-stripping agent for preventing peeling of the petroleum resin to the recycled aggregate and an aqueous acrylic emulsion adhesive for increasing the adhesion of the petroleum resin to the recycled aggregate,
30 to 80 parts by weight of the water, 0.1 to 0.5 parts by weight of the emulsifier of the natural resin component, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, 0.1/3 to 0.5 parts by weight of the octylphenol ethoxylate A petroleum resin binder composed of 3 parts by weight, 0.1 to 3.0 parts by weight of the anti-peeling agent and 0.1 to 3.0 parts by weight of the aqueous acrylic emulsion adhesive. According to claim 4,
Further comprising at least one of polyisobutylene, rosin or rosin ester for increasing the adhesion of the petroleum resin to the recycled aggregate,
30 to 80 parts by weight of the water, 0.1 to 0.5 parts by weight of the emulsifier of the natural resin component, 0.1 to 1.0 parts by weight of the sodium hydroxide, 20 to 70 parts by weight of the petroleum resin, 0.1/3 to 0.5 parts by weight of the octylphenol ethoxylate 3 parts by weight, 0.1 to 3.0 parts by weight of the anti-peeling agent, 0.1 to 3.0 parts by weight of the aqueous acrylic emulsion adhesive, and 1 to 30 parts by weight of at least one of the polyisobutylene, rosin or rosin ester A petroleum resin binder.

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