KR20140033532A - Direct and indirect heating type mixer for mixing asphalt concrete and the same type mixing method and the same type construction method - Google Patents

Abstract

Disclosed are a mixer for mixing asphalt concrete using direct and indirect heating methods, a method for mixing asphalt concrete using direct and indirect heating methods, and a construction method using direct and indirect heating methods. The mixer for mixing asphalt concrete using direct and indirect heating methods of the present invention has a housing divided into a mixing space for mixing asphalt mixtures and a hot air moving space. The mixer indirectly heats the asphalt mixtures accommodated in the mixing space using hot air introduced into the hot air moving space and directly heats the asphalt mixtures accommodated in the mixing space by supplying hot air passed the hot air moving space.

Description

TECHNICAL FIELD [0001] The present invention relates to an asphalt concrete mixer, a mixer for asphalt concrete mixing using direct and indirect heating, an asphalt concrete mixing method using a direct and indirect heating method, and a method for constructing an asphalt concrete using a direct and indirect heating method TYPE CONSTRUCTION METHOD}

The present invention relates to a mixer for asphalt concrete mixing using a direct and indirect heating method, an asphalt concrete mixing method using a direct and indirect heating method, and a method for installing an asphalt concrete using a direct and indirect heating method. More particularly, A mixer, a mixing method, and a construction method.

Since the production of the heated asphalt mixture requires a production facility equipped with an aggregate heating device and a mixing mixer, an aggregate storage place, a filler, and an asphalt storage and heating tank, it is very difficult to produce an asphalt mixture by a mobile type. .

The method of producing such a fixed asphalt mixture is to use a production facility in a factory, to heat the aggregate, to mix the asphalt and filler heated in the tank, and to transport the pigments to the site by a dump truck, And laura.

Fixed factory production method is difficult to control the temperature because it is difficult to construct due to low transportation distance or the temperature of asphalt mixture in winter. Most of the products requiring color are difficult to control due to small quantity production. It is difficult to control homogeneous products by mixing aggregate of different size and color by mixing asphalt for road pavement.

Production facilities have been developed to manufacture these.

The existing facility, which is a portable on-site heating mixing plant for production of asphalt mixture in the field, is a system that moves only the plant installed on the truck to the site to produce at high temperature, and it is troublesome to move to aggregate, filler and asphalt heat storage facility. The efficiency of use was reduced and it was not practically used.

In addition, portable equipment for the production of road repair materials has been developed, which recycles asphalt recycled aggregate. However, recycled aggregate is injected into the rotary mixer and the fire is directly sprayed on the mixer to heat the recycled aggregate. Temperature control is difficult due to concern about incineration, mixing time is too long and efficiency is low and it is not used.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as adhering to the prior art already known to those skilled in the art.

Korean Registered Utility Model No. 20-0215585 (December 21, 2000) Korean Patent Publication No. 10-2005-0076218 (July 26, 2005)

The present invention provides a mixer for asphalt concrete mixing using a direct and indirect heating method which can be heated using direct or indirect heat and mixes the asphalt concrete using such a mixer, , And to provide a method of constructing.

Mixer for mixing asphalt concrete using a direct or indirect heating method according to the present invention for achieving this object, the housing includes a housing divided into a mixing space and a hot air moving space mixed with the asphalt mixture, and introduced into the hot air moving space Indirectly heating the asphalt mixture accommodated in the mixing space by using hot air, hot air passing through the hot air moving space is supplied to the mixing space to directly heat the asphalt mixture contained in the mixing space.

A hot air fan is installed at one side of the housing to supply hot air to the hot air moving space, and the hot air moving space and the mixing space are connected to each other via a first hot air transfer pipe, and the mixing space and the hot air are provided with a second hot air. Characterized in that connected through the pipe.

A hopper installed on the housing to supply the asphalt mixture to the mixing space; A mixing screw provided in the mixing space to stir the asphalt mixture; And a driving motor for transmitting a driving force to the mixing screw.

A suction blower is installed at one side of the hot air blower, and the second hot air blower is installed between the suction blower and the mixing space.

Inside the housing, a guide panel is installed in a horizontal direction to divide the hot air moving space into an upper moving space and a lower moving space, and one end of the guide panel is fixedly coupled to one inner wall of the housing, and the other end thereof is The hot air is fixedly spaced apart from the other inner wall of the housing, the hot air is fixed to one side of the housing outer wall to supply hot air to the lower moving space.

In order to achieve the above object, the asphalt concrete mixing method using the direct and indirect heating method according to the present invention is divided into a mixed space in which an asphalt mixture is mixed and a hot air moving space, Hot air is indirectly heated inside the mixing space and hot air passing through the hot air moving space is supplied to the mixing space to directly heat the inside of the mixing space to keep the mixer temperature at 60 to 120 ° C Heating process; An aggregate filling process for supplying at least one aggregate selected from room temperature crushed aggregate, asphalt regenerated aggregate, silica sand, key stone and soybean gravel to a mixed space of the mixer; An asphalt supplying step of supplying asphalt or colorless asphalt of 120 to 180 ° C to the mixing space so as to coat the aggregate; A filler supplying step of injecting at least one filler selected from the group consisting of limestone, calcium carbonate, cement, slaked lime, and quick lime into the mixing space within 5 minutes after the asphalt supply process proceeds; And a second aggregate injection process for supplying new aggregate so as to prevent adhesion between asphalt-coated aggregates.

And a pigment supply process is performed between the asphalt supply process and the filler supply process to supply a weather-resistant inorganic pigment so as to give a color.

The color aggregate of natural stone color is supplied in the process of injecting the aggregate.

The elastic chips are supplied to the mixing space by heating the elastic chips of 10 mm or less to 100 to 150 ° C. before the asphalt supply process.

The glass supplying process is performed in which the coated glass which is cured so as to have a temperature of 300 ° C (temperature * time) by mixing crushed glass, acrylic, and cement of 10 mm or less before the asphalt supply process is introduced into the mixing space do.

In order to accomplish the above object, there is provided a method of constructing asphalt concrete using direct and indirect heating,

The mixed space is divided into a mixing space in which the asphalt mixture is mixed and a hot air moving space, and indirectly heating the inside of the mixing space by using hot air introduced into the hot air moving space, and hot air passing through the hot air moving space is mixed Heating the mixer by supplying hot air to the mixer for directly heating the inside of the mixing space to maintain the temperature of the mixer at 60 to 120 ° C, and introducing the mixture of room temperature crushed stone aggregate, silica sand, An asphalt supplying step of supplying asphalt or colorless asphalt at 120 to 180 ° C to the mixing space so as to coat the aggregate; Min, at least one selected from the group consisting of limestone, calcium carbonate, cement, slaked lime and quick lime, Aggregate coating process comprising the step of supplying a filler added; A packaging process for packaging the coated aggregate in ton back; Transporting the mixer and the packed coated aggregate to a truck and transporting it to the site; Heating the internal temperature of the mixer to 150 to 220 DEG C and supplying the aggregate coated in the mixing space, and when the temperature of the coated aggregate reaches 120 to 180 DEG C, A production process in which only about 30 to 70% of aggregate is discharged and the amount of the aggregate is again supplied to the mixer; And a construction process in which the asphalt concrete produced through the production process is installed on the road.

In the present invention, the aggregate is coated with asphalt and filler in the process, packed in a ton bag, and the coating mixture is injected into a direct and indirect heat mixer in the field,

In addition, color asphalt concrete, which uses a movable indirect heat type asphalt concrete production facility that is directly produced in the field,

First, it is meticulously weighed at the factory, mixed with asphalt at the room temperature, packed and packed, and there is no worry that the temperature will drop during transportation compared with the products produced in the asphalt concrete factory of color asphalt produced only by heating in the field, And there is no mixing of other materials in the materials used, so that the quality becomes uniform.

Second, since all the materials are supplied in a factory mix, it is easy to produce by only heating mixing in the field.

Third, the direct heat of indirect heat and low temperature is put into the mixer and it is produced at a certain temperature. Therefore, it is homogeneous because the material is overheated and not burned or altered, so the color asphalt concrete has good fluidity. And because it is directly produced in the field, it has excellent homogeneity of temperature, excellent workability and excellent workability.

Fourth, the heat is reused by the heat circulation system, so the fuel is saved.

1 is a view showing a mixer for mixing asphalt concrete using the direct and indirect heating method of the present invention,
FIG. 2 is a flow chart of the asphalt concrete mixing method using the direct and indirect heating method of the present invention and the method of installing the asphalt concrete using the direct and indirect heating method.

Hereinafter, a mixer for mixing asphalt concrete using direct and indirect heating according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the mixer for mixing asphalt concrete using the direct and indirect heating method of the present invention includes a mixing space 110 in which the inner space mixes the asphalt concrete, and a hot air movement space 120 in which the hot air moves And includes a partitioned housing (100).

The housing 100 is divided into a mixing space 110 and a moving space so that the asphalt concrete mixture put into the mixing space 110 by hot air introduced into the hot air moving space 120 is heated by indirect heating At the same time, the hot air moving in the hot air moving space 120 is directly supplied to the mixing space 110 to directly heat the asphalt concrete mixture present in the mixing space 110. That is, since indirect heating and direct heating are possible, the heating efficiency and the overall energy efficiency are improved.

The mixer for asphalt concrete mixing using the direct and indirect heating method of the present invention preferably includes a hot air fan 200, a first hot air transfer pipe 300 and a second hot air transfer pipe 400.

The hot air (200) is coupled to one side of the housing (100) and functions to supply hot air to the hot air moving space (120) formed in the housing (100).

The heated air supplied from the hot air fan 200 to the hot air moving space 120 moves to the mixing space 110 to heat the asphalt concrete mixture contained in the mixed space 110 directly. The mixing space (110) is connected via the first hot air transfer pipe (300). The first hot air conveyance pipe 300 may be formed in various shapes and may be installed so as to minimize interference with other facilities, and a separate inhaler S may be installed on the duct.

The mixing space 110 and the hot air fan 200 are connected to each other through the second hot air transfer pipe 400 so that the hot air transferred to the mixing space 110 through the first hot air transfer pipe 300 can be recycled again desirable.

That is, the hot air flows from the hot air blower 200 to the hot air moving space 120, the first hot air conveying pipe 300, the mixing space 110, the second hot air conveying pipe 400, > Hot air blower 200 "and can be recycled. In this process, the mixing space 110 is directly or indirectly heated by hot air, thereby improving energy efficiency.

In addition, there is an advantage that environmental pollution can be prevented as the noxious gas and unburned fuel contained in the hot air to which the hot air 200 is supplied are completely incinerated.

 The mixer for asphalt concrete mixing using the direct and indirect heating method of the present invention comprises a hopper 500 installed on a housing 100 for supplying an asphalt mixture to a mixing space 110, A mixing screw 600 rotatably installed in the mixing screw 110 and a driving motor 700 for transmitting a rotational force to the mixing screw 600.

The metered asphalt concrete mixture is introduced into the mixing space 110 through the hopper 500 while the mixing screw 600 is rotated by the operation of the driving motor 700 to mix the asphalt concrete mixture .

Further, it is preferable that a suction blower 800 is installed at one side of the hot air fan 200. The suction blower 800 sucks the hot air that directly heats the asphalt concrete mixture in the mixing space 110 with strong pressure and pulls the hot air in the direction of the hot air fan 200 to smooth the overall hot air circulation structure. When the suction blower 800 is installed, the second hot air transfer pipe 400 is preferably installed between the suction blower 800 and the mixing space 110.

The mixer for asphalt concrete mixing using the direct and indirect heating method of the present invention maximizes the energy efficiency by maximizing the time during which the hot wind stays in the hot wind moving space 120.

To this end, by dividing the inside of the housing 100, it is possible to maximize the time during which the hot air stays in the hot air moving space 120. To this end, the guide panel 900 is installed inside the housing 100 desirable.

The guide panel 900 is horizontally installed to divide the hot air moving space 120 into an upper moving space 120a and a lower moving space 120b. That is, one end of the guide panel 900 is fixedly coupled to the inner wall of one side of the housing 100, and the other end thereof is spaced apart from the inner wall of the other side of the housing 100 by a predetermined distance. The guide panel 900 can be moved to the upper moving space 120a through the space formed between the other end of the guide panel 900 and the inner wall of the other side of the housing 100.

At this time, it is preferable that the hot air fan 200 is fixed to one side of the outer wall of the housing 100 in order to make the moving path of the hot air the longest distance.

Therefore, the hot air supplied from the hot air fan 200 is transferred to the upper part of the housing 100 through the space formed between the other end of the guide panel 900 and the inner wall of the other side of the housing 100 -> the hot air 200 -> the lower moving space 120b - Can be moved through the space 120a, the first hot air transfer pipe 300, the mixing space 110, the second hot air transfer pipe 400, and the hot air fan 200. [

As described above, according to the mixer for asphalt concrete using the direct and indirect heating system of the present invention, not only the energy efficiency can be improved, but also the equipment itself can be mounted on a truck or the like to be compacted and packaged There is an advantage.

Hereinafter, an asphalt concrete mixing method using the direct and indirect heating method of the present invention and an asphalt concrete construction method using direct and indirect heating methods will be described with reference to FIG.

The asphalt concrete mixing method using the direct and indirect heating method of the present invention includes a heating step (S10), a primary aggregate putting step (S20), an asphalt feeding step (S30), and a filler supplying step (S40).

The heating process S10 is divided into a mixing space 110 in which the asphalt mixture is mixed and a hot air moving space 120. The hot air introduced into the hot air moving space 120 is used to heat the inside of the mixing space 110 Hot air is directly supplied to the mixer which directly heats the interior of the mixing space 110 by supplying the hot air passing through the hot air moving space 120 to the mixing space 110. The mixer is heated to a temperature of 60 to 120 ° C It is a process to maintain.

After the heating process (S10), the primary aggregate injection process (S20) proceeds.

The primary aggregate inputting process S20 is a process of injecting at least one aggregate selected from a room temperature crushed aggregate, an asphalt regenerated aggregate, a silica sand, a marble stone, a soybean gravel and a colored aggregate into a mixing space 110 of a mixer, Dimensions should be selected in the range of 3 ~ 20mm.

The reason for injecting the aggregate at room temperature is that when the heated aggregate is supplied, the asphalt is flowed down to be described later, and the asphalt coating thickness is reduced as well as the asphalt concrete is formed. As a result, high temperature asphalt is covered on the surface of the room temperature aggregate At the same time, the coating thickness can be made thicker.

The reason for heating the interior of the mixer is to secure the fluidity of the asphalt since the asphalt to be described later hardens when it comes into contact with the aggregate at room temperature. That is, if the internal temperature of the mixer is below 60 ° C, the coating becomes difficult. If the temperature is above 120 ° C, the aggregate is heated and the asphalt can flow down from the aggregate surface.

The asphalt supplying process S30 is performed by heating the road asphalt or colorless asphalt to 120 to 180 DEG C and mixing the above aggregate 100 parts by weight To the mixer mixing space 110 in the range of about 4 to 10 parts by weight with respect to the mixing ratio.

In the process of injecting the primary aggregate (S20), more than 50% of the aggregate is first put into the mixer and mixed with the asphalt, and then the remaining aggregate is added to the aggregate to prevent particle adhesion between the aggregates. It is preferable to use 3 to 10 parts by weight for the asphalt recycled aggregate and 1 to 4 parts by weight for the asphalt recycled aggregate.

After the aggregate is coated using the asphalt, the filler supplying process S40 is performed. The filler supplying process S40 is a process of injecting the filler into the mixing space 110 of the mixer. Calcium carbonate, cement, slaked lime and quick lime within 5 minutes after the step (S30) proceeds.

When the filler is added in an amount of 1 part by weight or less, there is no use effect. When the filler is used in an amount exceeding 10 parts by weight, workability is deteriorated.

By supplying and mixing the filler within 5 minutes, the influence of the internal heat of the mixer on the aggregate can be minimized.

After the filler is introduced, a second aggregate material input process (S50) is performed in which the aggregate material and the asphalt are not mixed together in the first aggregate material input process (S20).

Here, additives are added. The additive can be selected as needed among SBS, EVA, rosin, petroleum resin, process oil, PE WAX, elastic chips (pulverized waste tire, etc.).

Meanwhile, the pigment supply process (S60) is performed between the asphalt supply process (S30) and the filler supply process (S40), thereby imparting color to the asphalt concrete. As the pigment, it is preferable to use a weather- And about 0.1 to 2 parts by weight based on 100 parts by weight of the aggregate.

If a natural stone color is to be imparted, the pigment supplying process (S60) may be omitted, and the color aggregate of a natural stone color may be supplied in the primary aggregate applying process (S20).

Further, in the case of a package requiring elasticity, an elastic chip may be used. Such an elastic chip can use pulverized waste tire or EPDM. In this case, the elastic chip supply process (S30) before the asphalt supply process S70), it is possible to realize the elastic function.

The elastic chip supplying process (S70) using the pulverized waste tire proceeds by heating the elastic chips of 10 mm or less to 100 to 150 占 폚 and supplying the elastic chips to the mixing space 110 of the mixer. In other words, when the elastic chips are used as they are, the characteristic smell of the tire is severely exerted and the adhesion with asphalt is reduced. As a result, 0.5 to 2 parts by weight of asphalt is coated on 100 parts by weight of the heated pulverized waste tire, It is.

The pulverized waste tire is advantageously used in an amount of 50 parts by weight or less based on 100 parts by weight of the aggregate in terms of securing the elastic force.

EPDM can be used as an elastic chip when color is required, and it is not necessary to coat it with asphalt.

It is preferable that the glass supplying step (S80) for supplying the pulverized glass be performed before the asphalt supplying step (S30) in order to improve the esthetics and the sliding resistance.

The glass supplying process S80 is a process of mixing glass powder, acrylic, and cement having a size of 10 mm or less and injecting coated glass cured in a condition of 300 ° C (temperature * time) or more into the mixing space 110 of the mixer.

The coated glass is used by mixing 1 to 5 parts by weight of acrylic and 3 to 10 parts by weight of cement with respect to 100 parts by weight of the glass, and the amount of the coated glass is limited to 50 parts by weight or less with respect to 100 parts by weight of the aggregate.

2, an asphalt concrete construction method using the direct and indirect heating method of the present invention includes an aggregate coating process S100, a packing process S200, a shipping process S300, a production process S400, and a construction process S500. .

The aggregate coating process S100 includes a heating process S10, a primary aggregate injection process S20, an asphalt supply process S30, a filler supply process S40, and a secondary aggregate injection process S50. These processes are replaced by the above.

After the aggregate coating process (S100), the packing process (S200) proceeds.

The packing process (S200) can pack the asphalt, filler and pigment-coated aggregate in a tone bag or plastic for convenient use at the construction site, or in bulk in the case of mass production.

After the wrapping process (S200) is performed, a conveying process (S300) is performed in which the mixer and the packed aggregate are loaded on a truck and moved to a construction site. That is, in the entire construction process, since the mixer and the material are produced and transported rather than being fixed, the quality of the coated aggregate can be maintained.

In the production process (S400), hot air is supplied to the mixer, the internal temperature of the mixer is heated to 150 to 220 DEG C, and the aggregate coated in the mixing space 110 is introduced. The temperature of the coated aggregate is 120 to 180 DEG C , Only 30 ~ 70% of aggregate is discharged to maintain the internal temperature of the mixer, and the mixer is again supplied with a corresponding amount of aggregate.

That is, when the packed coated aggregate is put into the mixer and the whole amount is discharged, the internal temperature of the mixer is continuously increased until the new coated aggregate is put into the mixer, the mixer is incinerated and the mixer operation is stopped before the new material is inserted. It takes a long time to reduce the work efficiency. Thus, the above-mentioned problems can be solved.

The construction process (S500) in which the asphalt concrete produced through the production process (S400) is installed on the road is carried out, thereby realizing the construction method in which the productivity, the workability, the uniformity of quality, and the economical efficiency are guaranteed.

<Examples>

Aggregate Coating Process

① Heating process: Heat the inside of the mixer to 100 ℃ using hot air, then turn off the hot air.

② Primary aggregate input process: 700kg of mixer with 1 ~ 5mm aggregate in dry condition is put into mixer.

③ Asphalt supply process: 48 kg of colorless asphalt is heated to 150 ℃ and put into the mixer. This asphalt supply process may be carried out simultaneously with the primary aggregate input process.

④ Pigment supply process: Put 10 kg of pigment and mix for about 30 seconds

⑤ Supply process of filler: After checking whether asphalt and pigment are coated on aggregate, add 40kg of calcium carbonate and mix for 10 seconds.

⑥ Add 300kg of aggregate of 1 ~ 5mm and mix for 5 seconds.

Packaging Process

Coated and mixed aggregates are packed conveniently in a ton bag.

Transportation course

Load the mixer with the generator and send it to the construction site, then wait at the construction site. The coated aggregate is also transported to the construction site by truck.

Production process

The mixer is heated to 150 DEG C, and 1000 kg of the coated aggregate is put into a mixer. When the temperature reaches 135 DEG C, about 500 kg is discharged, and then 1000 kg is again supplied.

Construction process

After making 3.8 cm of the 13 mm wheat grain size ascon, the heat is placed on the upper part of the dish, and 1.2 cm is placed on the upper part.

The asphalt concrete produced through this process has excellent quality satisfying the standard.

Exam name Stability (N) Flow  (1/200 cm) Porosity (%) color
( Limit Sample  compare) Test result 1,100 30 12 Red
(clear) standard 500 or more 20 to 40 - Sample comparison

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

100: housing 110: mixing space
120: hot air moving space 120a: upper moving space
120b: lower moving space 200:
300: first hot air transfer pipe 400: second hot air transfer pipe
500: hopper 600: mixing screw
700: drive motor 800: suction blower
900: Guide panel
S10: Heating process S20: Primary aggregate injection process
S30: Asphalt supply process S40: Filler supply process
S50: Secondary aggregate injection process S60: Pigment supply process
S70: Elastic chip supply process S80: Glass supply process
S100: Aggregate coating process S200: Packaging process
S300: Carrying process S400: Production process
S500: Construction process

Claims (11)

The interior includes a housing divided into a mixing space and a hot air moving space in which the asphalt mixture is mixed, and indirectly heats the asphalt mixture contained in the mixing space by using the hot air introduced into the hot air moving space, and at the same time, a hot air moving space. Mixing the asphalt concrete mixture using a direct or indirect heating method, characterized in that for supplying the hot air passing through the mixing space to directly heat the asphalt mixture contained in the mixing space.
The method according to claim 1,
A hot air blower is installed at one side of the housing to supply hot air to the hot air moving space.
The hot air moving space and the mixing space are connected via a first hot air transport pipe,
The mixing space and the hot air blower is characterized in that connected via a second hot air transfer pipe, asphalt concrete mixing mixer using a direct or indirect heating method.
The method according to claim 2,
A hopper installed on the housing to supply the asphalt mixture to the mixing space;
A mixing screw provided in the mixing space to stir the asphalt mixture;
Further comprising a driving motor for transmitting a driving force to the mixing screw. The mixer for asphalt concrete mixing according to the direct and indirect heating method.

The method according to claim 3,
A suction blower is installed on one side of the hot air,
And the second hot air transfer pipe is installed between the suction blower and the mixing space.
The method according to claim 2,
Inside the housing, a guide panel is installed in a horizontal direction to divide the hot air moving space into an upper moving space and a lower moving space.
One end of the guide panel is fixedly coupled to one inner wall of the housing, and the other end thereof is spaced apart from the other inner wall of the housing by a predetermined distance.
Wherein the hot air is fixed to one side of the outer wall of the housing to supply hot air to the lower moving space.
The mixed space is divided into a mixing space in which the asphalt mixture is mixed and a hot air moving space, and indirectly heating the inside of the mixing space by using hot air introduced into the hot air moving space, and hot air passing through the hot air moving space is mixed A heating process of supplying hot air into the mixer for directly heating the inside of the mixing space to maintain the temperature of the mixer at 60 to 120 ° C;
A primary aggregate input process for supplying at least one aggregate selected from a room-temperature crushed aggregate, an asphalt regenerated aggregate, a silica sand, a keystone and a soybean gravel to a mixed space of the mixer;
An asphalt supplying step of supplying asphalt or colorless asphalt of 120 to 180 ° C to the mixing space so as to coat the aggregate;
A filler supplying step of injecting at least one filler selected from the group consisting of limestone, calcium carbonate, cement, slaked lime, and quick lime into the mixing space within 5 minutes after the asphalt supply process proceeds; And
Asphalt concrete mixing method using direct and indirect heating method, including a second aggregate injection process for supplying new aggregate so as to prevent adhesion between asphalt-coated aggregates.

The method of claim 6,
Between the asphalt supply process and the filler supply process,
Wherein a pigment supply process is performed to supply a weather-resistant inorganic pigment so as to impart color to the asphalt concrete mixture.
The method of claim 6,
The asphalt concrete mixing method using the direct and indirect heating method, wherein color aggregate of natural stone color is supplied in the primary aggregate injection process.

The method of claim 6,
Before the asphalt supply process,
Wherein the elastic chips are heated to 100 to 150 DEG C to supply the elastic chips to the mixing space.

The method of claim 6,
Before the asphalt supply process,
Wherein a glass supplying process is performed in which the coated glass cured so as to have a temperature of 300 ° C (temperature * time) is charged into the mixing space by mixing pulverized glass, acrylic, and cement of 10 mm or less. Asphalt concrete mixing method.

The mixed space is divided into a mixing space in which the asphalt mixture is mixed and a hot air moving space, and indirectly heating the inside of the mixing space by using hot air introduced into the hot air moving space, and hot air passing through the hot air moving space is mixed Heating the mixer by supplying hot air to the mixer for directly heating the inside of the mixing space to maintain the temperature of the mixer at 60 to 120 ° C, and introducing the mixture of room temperature crushed stone aggregate, silica sand, And supplying asphalt or colorless asphalt to the mixing space at a temperature ranging from 120 to 180 DEG C so as to coat the aggregate, and a step of supplying the asphalt to the mixing space, And at least one selected from the group consisting of limestone, calcium carbonate, cement, slaked lime, An aggregate coating process including a filler supplying process to be inserted between the asphalt and the asphalt-coated aggregate and a second aggregate supplying process to supply new aggregate to prevent adhesion between the asphalt-coated aggregate;
A packaging process for packaging the coated aggregate in ton back;
Transporting the mixer and the packed coated aggregate to a truck and transporting it to the site;
Heating the internal temperature of the mixer to 150 to 220 DEG C and supplying the aggregate coated in the mixing space, and when the temperature of the coated aggregate reaches 120 to 180 DEG C, A production process in which only about 30 to 70% of aggregate is discharged and the amount of the aggregate is again supplied to the mixer; And
The asphalt concrete construction method according to claim 1, wherein the asphalt concrete is produced through the production process.

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