KR101748711B1 - A package modifying asphalt binders and modified asphalt binder in there and manufacturing methods thereof - Google Patents

Abstract

The asphalt binder is packed in a packaging material made of a modifier to compress the asphalt binder, and the asphalt binder is packed with heat, so that it is easily and inexpensively transported and stored. When heated with little heat energy in the field, the polymer asphalt The present invention relates to a packed reforming asphalt which can be reformed and a method for producing the reforming asphalt.

Description

FIELD OF THE INVENTION The present invention relates to asphalt binder modifying packaging materials and modified asphalt packed therein, and to a modifying asphalt binders and modified asphalt binders,

The present invention can easily and cheaply transport and store the asphalt binder by packing the asphalt binder in a modifying packing material and compressing and sealing the asphalt binder by packing the asphalt binder and heating it with a small amount of thermal energy in the field to reform it into a polymer asphalt of desired performance The present invention relates to a modified asphalt binder packaging material and a modified asphalt packed with the modified asphalt binder material.

Asphalt is a natural polymer composed mainly of hydrogen and carbon. When the temperature is high, the viscosity becomes low and becomes a liquid phase. At low temperature, it hardens and solidifies. Asphalt classified according to heat-sensitivity has excellent waterproof and adhesion due to its excellent plasticity and has been used in various industrial fields for a long time.

Since the nature of the asphalt changes depending on the temperature, the viscosity and shape of the asphalt changes. Therefore, the asphalt must be heated and liquefied until it is applied to the site after being produced in the asphalt production plant.

Especially, the asphalt should be moved from the refinery to the asphalt mixing plant, then moved to the construction site again from the mixing plant, and the asphalt should be heated to 180 ° C. or higher during the movement process, Position.

Also, in order to adapt to various climatic conditions and increase the performance, various polymers are added to existing asphalt binder and mixed. The modified asphalt binder maintains viscoelasticity over a wide range of temperature conditions and is therefore increasingly used. However, in order to transport and store, it is a reality that heat energy should be continuously used to maintain the liquid state by heating to a high temperature of 200 degrees or more. Nonetheless, the polymer of the modified modified asphalt binder in the asphalt refinery tends to be separated from the asphalt over time, which makes it difficult to store and control quality in the asphalt refinery or asphalt mixture plant.

Such modified asphalt is used in various places, and mainly used is road pavement.

Asphalt used to pack roads is used as a binder to bond various kinds of aggregates. At this time, the asphalt binder is modified to provide physical properties in consideration of the climate of the area where it is used. KS F 2389 (Performance Rating of Asphalt) classifies asphalt for road pavement into the concept of maximum and minimum on-site climatic conditions. Based on the average peak temperature for seven days a year and the lowest package design temperature during the year. The asphalt binder classifies the resistance to firing at high temperatures and the resistance to cracking at low temperatures as the commonality grade.

Although roadside pavement is mainly used for road pavement, PG 64-22 is mainly used for straight asphalt. However, highway traffic, intersections, hills, heavy traffic roads, heavy roads, subtropical roads, It is necessary to use modified asphalt as a binder because of high possibility of firing and cracking, and a polymer is attached to improve the compatibility level.

That is, the selection of the asphalt mixture in the asphalt pavement takes into account weather conditions, local conditions, traffic volume, and material conditions. Generally, asphalt mixtures with fluidity are used on roads with heavy traffic of heavy trucks such as trucks, and asphalt mixtures with flexibility and durability are selected on roads with low traffic volume. The roads in the snowy areas use asphalt mixtures with an emphasis on abrasion resistance. When designing the mixture of asphalt mixture in accordance with the site conditions, the asphalt binder is selected considering the proper grade property together with the distribution of the aggregate.

As a result, asphalt having improved quality using various polymer modifiers has been widely used.

However, since it is necessary to continuously heat the modified modifier in order to prevent the modified asphalt from hardening and to prevent the polymer modifier from being separated in the process of storing the asphalt binder mixed with the polymer modifier in an oil refinery or moving it to the asphalt mixture plant, There are many.

Especially, it is necessary to use a small amount of various modified asphalt in various road construction sites. However, the amount of modified asphalt produced in the asphalt refining plant or the asphalt mixture plant should be more than a certain amount, and the compatibility grade of the produced modified asphalt is very limited It is very difficult to obtain a small amount of modified asphalt having the publicability grade required.

Techniques have been developed for improving the disadvantages of such transportation and providing packaged asphalt for transporting a certain amount, for example, Patent Documents 1 and 2.

However, in the case of such a conventional packaged asphalt or the like, it is not a modified asphalt having a publicly available grade that is simply packed with asphalt or a similar product, so that a certain amount of a modifier is added and mixed in the asphalt mixture production process, It must be melted and used. Thus, in the process of mixing the modifier to the asphalt, the mixing amount of the polymer modifier must be managed as a separate process in the asphalt mixture plant, and the supply of the asphalt mixture to the road construction is often delayed due to the failure to obtain the asphalt mixture having the predetermined property.

1. Korean Patent Publication No. 10-2000-0075930 2. Korean Patent No. 10-1164883

The present invention has been developed in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method for producing a modified asphalt-containing asphalt by melting a modifier in an oil refinery, an asphalt mixture production plant, And to provide a modified asphalt pavement packed with the modified asphalt pavement material and a method for producing the same.

More particularly, the present invention relates to an asphalt binder which is packed in a packaging material together with a polymer modifier to remove internal air to compress and heat-seal the asphalt binder, thereby easily and cheaply transporting and storing the asphalt binder, A modified asphalt pavement material modified with a polymer asphalt having a desired compatibility level, a modified asphalt pavement packed with the modified asphalt pavement material, and a method of manufacturing the same.

In order to achieve the above object, a modified packaging material according to the present invention is a packaging material for packaging an asphalt binder, comprising a thermoplastic film layer made of a thermoplastic resin to protect an asphalt binder stored from an external impact, and a thermoplastic resin film laminated on a wall surface of the thermoplastic film layer And a polymer layer made of a polymer.

The thermoplastic film layer may be formed of a mixture of one or more thermoplastic plastics such as ethylene, polyolefin, and propylene.

The modifier polymer to be sprayed or laminated on the wall surface of the thermoplastic film layer may be selected from the group consisting of styrene-butadiene-styrene (SBS), styrene-butadiene-rubber (SBR), crumb rubber modifiers (CRM), styrene-isoprene- Elastomers such as thermoplastic plastics such as EPDM (ethylene propylene), EVA (ethylene vinyl acetate), polyolefins, polyvinyl chloride (PVC), polyethylene and polypropylene, extender series such as sulfur and lignin, For example, a mixture of any one or more of a series of hydrocarbons such as silica, limestone, lime fly ash, carbon black, sulfur and cement, filler series, asphalt regenerant, gilsonite and the like.

And an ultraviolet ray and / or an oxidation-resistant layer made of ultraviolet ray and oxidation-resistant material are further laminated on the wall surface of the reforming packaging material.

A fiber layer may be further laminated on the wall surface of the polymer layer.

A packed reforming asphalt according to another aspect of the present invention is an asphalt packed with the reforming packing material, which is composed of a reforming packing material together with a polymer modifying agent and an asphalt binder stored inside the reforming packing material, The reforming packaging material and the asphalt binder are melted and mixed by heating in a production process or a construction site, whereby a modified asphalt of a commonality grade can be formed.

According to another aspect of the present invention, there is provided a method for manufacturing packaged asphalt for reforming, comprising the steps of: preparing a packing material for reforming, packaging the asphalt binder in the packing material for modification, The method of manufacturing the reforming packaging material comprises the steps of spraying a polymer on the inner surface of the thermoplastic film and applying the polymer to the inner surface of the thermoplastic film or laminating the polymer film to produce a reforming packaging film, Is formed in the form of a wrapping paper.

In the process of modifying the packaging material, fibers may be laminated on the polymer layer, and ultraviolet and oxidation resistant materials may be further laminated on the wall surface of the thermoplastic film.

In addition, the present invention can further incorporate a functional compound including an anti-stripping agent such as Hydrate Lime and a liquid release agent required for roads and structures using asphalt into an asphalt binder.

As described above, in the method for manufacturing packaged modified asphalt and modified asphalt according to the present invention, the modifying packaging material and the asphalt binder are melted and mixed by heating and melting the asphalt binder packaged in the packaging material composed of the polymer modifier Accordingly, it is possible to obtain modified asphalt modified with a desired degree of commonality.

Also, measures to prevent the separation of the polymer modifier until the production of the modified asphalt without supplying the heat, because it does not need to maintain the liquid phase in the moving process due to the heating and melting at the asphalt mixture production plant or the construction site in the packed state. So that the consumption of heat energy can be reduced.

In addition, since it is possible to simply use the modified asphalt of the publicness grade required by selecting as many as necessary amount in the asphalt mixture production process or the construction site, it is possible to reduce unnecessary asphalt waste and cost and time for disposal of residual asphalt have.

1 is an enlarged view showing a laminated structure of an example of a modifying asphalt pavement material according to the present invention.
2 is an enlarged view showing a laminated structure of another example of the asphalt paving material for reforming according to the present invention.
3 is a partial cross-sectional perspective view of an example of a packed reforming asphalt according to the present invention
FIG. 4 is a flow chart illustrating a process for manufacturing packaged reforming asphalt according to the present invention

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention can form a desired grade of modified asphalt by heating and melting in a packed state.

The present invention may include a modifying packaging material 10 for packaging the modifying asphalt and an asphalt binder 20 stored in the modifying packaging material.

In particular, the modifying asphalt packaging material is a packaging material for storing the asphalt binder, and comprises a thermoplastic film layer 11 made of a thermoplastic resin for protecting the asphalt binder stored from external impacts, as shown in FIGS. 1 and 2, And a polymer layer 12 laminated on the wall surface of the film layer and made of the modifier polymer.

The modifying packaging material 10 may be made of any one of modifiers for modifying the asphalt binder 20. That is, the modified asphalt can be made into various modifiers so as to produce a desired grade of modified asphalt. The content of the modified asphalt can be adjusted by adjusting the thickness and the width of the reforming packaging material 10 as compared with the asphalt binder 20, Can be obtained.

Accordingly, it is preferable that the surface of the reformable packaging material 10 displays the type of modified asphalt when it is modified.

The modifying packaging material 10 may be made of only one modifying material, but it is preferable that the weight of the asphalt binder 20 to be packed and the thickness of the packing material to prevent the modifying packing material from being damaged during transportation or storage As shown in FIGS. 2 and 3, the thermoplastic film layer 11 is made of a thermoplastic resin and protects the stored asphalt from external impact, And a polymer layer 12 laminated on the inner wall of the polymer layer 12 and made of the modifier polymer.

The thermoplastic film layer 11 may be made of a mixture of at least one thermoplastic resin selected from the group consisting of polyethylene (PE), ethylene vinyl acetate (EVA), polyolefin, PP, polyvinyl alcohol (PVA), and polystyrene And the polymer layer 12 may be made of a modifier polymer.

The polymer layer 12 is laminated on the inner wall of the thermoplastic film layer 11 by spraying the modifier polymer or joining it in the form of a film to form a thin film.

The amount of the modifier polymer constituting the polymer layer 12 can be determined in relation to the amount of the resin constituting the thermoplastic film layer and the amount of the asphalt binder to be packed.

If the amount of polymer is increased by a certain amount or the kind of polymer is changed, the grade of polymer modified asphalt can be improved.

For example, the reforming packaging material 10 that reforms PG 64-22 asphalt to PG 82-22 contains a polymer that contains more polymer than the modifying packaging material 10 of PG 76-22 or that has better resilience can do.

The modifier polymer may be selected from elastomers such as styrene-butadiene-styrene (SBS), styrene-butadiene-rubber (SBR), crumb rubber modifiers (CRM), styrene-isoprene- styrene (SIS), polychloroprene latex, thermoplastic plastomers or sulfur including ethylene propylene, ethylene vinyl acetate (EVA), polyolefins, polyvinyl chloride (PVC), polyethylene, polypropylene or extender series including lignin, a filler series or an asphalt regenerant containing lime fly ash, carbon black, sulfur, cement, or a hydrocarbon series including gilsonite.

The modifying packaging material 10 is excellent in viscoelasticity and is resistant to temperature, and can directly contain the heated asphalt binder.

An ultraviolet ray and an oxidation resistant layer 11p made of ultraviolet ray and oxidation resistant material are further laminated on the wall surface of the reformable packaging material 10 and a fiber layer 12f is further laminated on the inner wall of the polymer layer 12 Do.

The packaged modified asphalt according to the present invention is circulated in a packed state, and when exposed to sunlight during the circulation process, the reformable packaging material 10 is aged due to ultraviolet rays and is easily damaged or affected by physical properties of the asphalt for reforming It is preferable to apply ultraviolet rays and an oxidation resistant material to the surface of the reforming packaging material or the asphalt binder to protect the reforming packaging material and the asphalt binder from ultraviolet rays.

Since the fibrous layer 12f is widely used in producing an asphalt mixture such as SMA (Stone Mastic Asphalt), it may be added to the reformable packaging material 10 and used.

That is, in the case of the SMA mixture, cellulosic fibers are added to form a fiber layer 12f on the inner wall of the modifier polymer layer in consideration of this point, It is not necessary to add fibers separately in the mixture production with the aggregate.

The fibrous layer 12f may be formed by laminating the inside of the modifier polymer layer 12 as shown in Fig. 1, or by mixing fibers into a polymer constituting the modifier polymer layer as shown in Fig.

The thickness of the reformable packaging material 10 may be changed according to the amount of the modifier depending on the condition of the place where the asphalt is applied. But is not limited to, more than 1 mm thickness.

The asphalt binder 20 is poured into the interior of the reforming packaging material 10 constructed as described above and vacuum-packed to produce a packed reforming asphalt according to another aspect of the present invention.

As shown in FIG. 3, the packed reforming asphalt is an asphalt packed with a wrapping paper, which is composed of a reforming packaging material 10 made of a modifier polymer and an asphalt binder 20 stored in the reforming packaging material.

The packaged modified asphalt of the present invention can be produced by melting the modifying packaging material and the asphalt binder only by applying heat at the asphalt mixture production plant or the construction site, and to produce the modified asphalt binder having the required compatibility level.

As described above, the asphalt binder 20 may be further mixed with fibers in place of the fibrous layer 12f on the inner wall of the polymer layer 12, and other anti-stripping agents may be added depending on the conditions under which the asphalt is used. And the like can be further added.

Hereinafter, an example of a method for producing packaged modified asphalt according to the present invention constructed as above will be described.

A method for manufacturing a packed reforming asphalt comprises the steps of: (S1) and (S2) of producing a reforming packaging material, (3) injecting an asphalt binder into the reforming packaging material, (S4), and a step (S5) of fusing and sealing the inlet of the reformable packaging material with heat.

The modifying packaging material is prepared by spraying a modifier polymer on the inner surface of the thermoplastic film or by laminating a polymer film on the inner surface of the thermoplastic film to form a modifying packaging film S1 and forming a reforming packaging film in a bag shape S2 Lt; / RTI >

In the process of manufacturing the reformable packaging material, fibers may be laminated on the inner wall of the modifier polymer, and ultraviolet and oxidation resistant materials may be further laminated or treated on the wall surface of the thermoplastic film.

The process of laminating the fibers to the polymer may be performed by mixing and laminating the desired amount of fibers in the polymer melt.

Of course, the process of forming the fibrous layer may be omitted, and the fibers may be mixed with the asphalt binder to be packed.

The modifying asphalt according to the present invention having the above-described constitution and method can improve the packing technology of the asphalt binder to facilitate transportation and storage. It is also possible to use the modifier polymer Reduces the consumption of thermal energy needed to inhibit the separation of asphalt binder.

In addition, it is possible to modify the required level of compatibility to meet the required amount of the asphalt mixture production plant or construction site, thereby eliminating the waste of unnecessary asphalt and the troubles of handling the remaining asphalt.

Particularly, when the materials added together with the aggregate in the mixing design of the asphalt mixture such as the polymer and the cellulose fiber are formed into the composite layer or the composite material of the packaging bag, the mixing process of the asphalt is simplified and simplified, The cost of storage is greatly reduced, and construction can be carried out directly at the construction site as required, thus greatly improving the construction quality and performance of road construction.

10: Reforming packing material
11: thermoplastic film layer 11p: resistance layer
12: polymer layer 12f:
20: Asphalt binder

Claims (10)

As the modifying packaging material 10 for packaging the asphalt binder 20,
A thermoplastic film layer 11 made of a thermoplastic resin to protect the asphalt binder 20 stored from external impacts;
The amount of the modifier polymer is set so as to correspond to the amount of the resin constituting the thermoplastic film layer 11 and the amount of the asphalt binder 20 to be packed, which is formed as a thin film by the modifier polymer and laminated on the wall surface of the thermoplastic film layer 11, And a polymer layer (12)
The modifying packaging material 10 made of any one of the asphalt binder 20 and the rubber or the plastic for modifying the asphalt binder 20 is melted by the asphalt mixing process or heating at the construction site Wherein the modified asphalt is mixed to form a modified asphalt. The method according to claim 1,
The thermoplastic film layer 11 is made of a mixture of at least one thermoplastic resin selected from the group consisting of polyethylene (PE), ethylene vinyl acetate (EVA), polyolefin, polypropylene (PP), polyvinyl alcohol (PVA) and polystyrene A modified asphalt paving material characterized by. The method according to claim 1,
Wherein a resistive layer (11p) made of ultraviolet ray and oxidation resistant material is further laminated or treated on the wall surface of the reformable packaging material (10). The method of claim 3,
And a fibrous layer (12f) is further laminated on a wall surface of the polymer layer (12). The method of claim 3,
Wherein the asphalt binder is further mixed with fibers. The method according to claim 1,
The modifier polymer may be selected from elastomers such as styrene-butadiene-styrene (SBS), styrene-butadiene-rubber (SBR), crumb rubber modifiers (CRM), styrene-isoprene- styrene (SIS), polychloroprene latex, thermoplastic plastomers or sulfur including ethylene propylene, ethylene vinyl acetate (EVA), polyolefins, polyvinyl chloride (PVC), polyethylene, polypropylene or extender series including lignin, a filler-based or asphalt regenerant containing lime fly ash, carbon black, sulfur, and cement, and a hydrocarbon series containing gillsonite. An asphalt packed with the packaging material of any one of claims 1 to 6,
The reforming packaging material 10 formed of the modifier polymer and the asphalt binder 20 stored in the reforming packaging material are melted and mixed by the asphalt mixing process or heating at the construction site to mix the modifying packaging material and the asphalt binder Wherein the modified asphalt is produced by mixing the asphalt with the modified asphalt. delete delete delete

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