KR20240173228A - Ton bag asphalt mixture and its manufacturing method, asphalt mixture, its manufacturing method, its pavement method using the same - Google Patents

Abstract

The present invention relates to a ton bag asphalt mixture, which can be produced only by the heating on-site to easily repair a road so as to extend a lifespan of the road, and to a method for manufacturing the same, an on-site heating type asphalt mixture using the same, a method for manufacturing the same, and a construction method thereof. The method for manufacturing the ton bag asphalt mixture comprises the steps of: inputting a first aggregate into a first mixer and heating the same at 60 to 120℃; inputting a part of asphalt into the first mixer and mixing the same;preparing a second aggregate as a particle separator; additionally inputting and mixing the second aggregate with the first aggregate; discharging the mixed primary material to have the moisture content of the aggregate to be greater than or equal to 1 %, and inputting the same into the second mixer to select at least one of the remaining asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additionally used oil at room temperature and mixing the same; and discharging the asphalt mixture manufactured in the second mixer and packaging the same in a ton bag.

Description

{TON BAG ASPHALT MIXTURE AND ITS MANUFACTURING METHOD, ASPHALT MIXTURE, ITS MANUFACTURING METHOD, ITS PAVEMENT METHOD USING THE SAME}

The present invention relates to a premix type asphalt mixture or an instant asphalt mixture that can be manufactured on-site by heating alone, and more specifically, to a ton-bag asphalt mixture and a manufacturing method, an on-site heated asphalt mixture manufactured using the same and a manufacturing method therefor, and a construction method therefor.

Asphalt concrete is generally produced in fixed plants and transported by dump trucks. When asphalt concrete produced in such fixed plants is transported to the site by dump trucks in the winter, the temperature of the surface in contact with the surrounding air decreases during the transport process, causing a temperature difference in the entire asphalt mixture. As a result, compaction deviations due to temperature differences occur during the laying and compaction processes, resulting in defects such as potholes and road damage.

To compensate for these shortcomings, asphalt concrete is produced using a mobile asphalt plant. However, when producing asphalt concrete using a mobile asphalt plant, not only the plant but also the asphalt tank, filler silo, etc. must be moved, the equipment is complex, and the installation period is long.

Therefore, it is difficult to apply in places where there are no plants, such as islands and mountainous regions, so cement pavement is generally applied in such places. However, this cement pavement has the problem that it takes more than 14 days to cure after laying, and especially in winter, it takes even longer.

In this way, although there are many places where asphalt paving is required, there are various problems due to the installation of complex equipment. Therefore, the inventor of the present invention has developed a ton-bag asphalt mixture that can be used on-site simply by heating and a manufacturing method thereof, as well as a method for manufacturing an asphalt mixture on-site using such ton-bag asphalt mixture and a construction method thereof.

KR 10-1971865 B1 (2019.04.18.)

The present invention has been made to solve the above problems, and the purpose of the present invention is to provide a ton-bag asphalt mixture and its manufacturing method that can be easily applied to island areas by producing it only by heating on site, thereby easily repairing the road, and producing low-noise asphalt concrete and colored asphalt concrete, and a field-heated asphalt mixture and its manufacturing method using the same, and a construction method thereof.

According to one embodiment of the present invention, a method for manufacturing a ton-bag asphalt mixture comprises the steps of: adding a first aggregate to a first mixer and heating it to 60 to 120°C; adding some asphalt to the first mixer and mixing it; preparing a second aggregate as a particle separator to prevent the first aggregate from hardening due to asphalt and the particles from sticking together; adding the second aggregate to the first mixer and mixing it within 60 seconds (since the second aggregate is used to reduce the adhesive strength between the first aggregate and the asphalt, the mixing time is limited to 60 seconds). The method comprises the steps of: discharging the mixed primary materials and, when the moisture content of the aggregate is 1% or higher, stacking them so that the moisture in the first and second aggregates generated by the heat of the first aggregate is removed, and making the moisture content less than 1% by the latent heat of the aggregate; and, when the moisture content is less than 1%, putting them into the second mixer and mixing them by selecting and adding at least one of the remaining asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additionally used oil at room temperature; and discharging the asphalt mixture manufactured in the second mixer and packaging it into ton bags.

The above second aggregate may be any one of single-grain aggregate, recycled aggregate, and stone powder.

The thermoplastic resin is input by selecting at least one of SBS, EVA, LDPE, and HDPE, the primary use oil is a process oil, and at least one of naphtha, aroma, and paraffin oil is used, the adhesive is input by selecting at least one of petroleum resin and rosin, and the filler is input by selecting at least one of calcium carbonate, lime powder, and slaked lime, and the additionally input oil can be input by selecting at least one of aroma oil, naphtha oil, and paraffin oil.

The above first aggregate is 30 to 70% of the total aggregate usage, the above second aggregate is 70 to 30% of the total aggregate usage, and the thermoplastic resin and process oil can be added in different amounts depending on the amount of the recycled aggregate usage.

The method for manufacturing a ton-backed asphalt mixture of the present invention further comprises mixing at least one of rubber powder, wood powder, cellulose fiber, new PVC powder, and recycled PVC powder, and when using the wood powder and cellulose fiber, 10 to 100 parts by weight of an emulsion of latex, acrylic, urethane, and EVA may be further mixed with at least one of the following per 100 parts by weight of the wood powder and cellulose fiber.

The tonback asphalt mixture of the present invention is manufactured by the manufacturing method described above.

The on-site heated asphalt mixture manufacturing method of the present invention comprises: a process of putting first aggregate into a first mixer and heating it to 60 to 120°C; a process of putting some asphalt into the first mixer and mixing it; a process of preparing second aggregate; a process of additionally putting the second aggregate into the first mixer and mixing it within 60 seconds; a process of selectively putting at least one of the remaining asphalt, a thermoplastic resin, an adhesive, a filler, and oil into the second mixer and mixing it; and a process of discharging the asphalt mixture produced in the second mixer and packaging it into ton bags; a process of transporting the asphalt mixture packaged into ton bags to a site; and a process of putting the asphalt mixture packaged into ton bags transported to the site into a heating mixer and heating it to 80 to 180°C to produce an asphalt mixture on-site.

The on-site heated asphalt mixture manufacturing method of the present invention can produce a medium-low temperature asphalt mixture at a temperature of 80 to 135°C by putting an asphalt mixture packed in a ton bag transported to the site into a heating mixer.

The on-site heated asphalt mixture manufacturing method of the present invention can produce a modified asphalt mixture by putting an asphalt mixture packed in a ton bag transported to the site into a heating mixer and at a medium temperature of 120 to 150°C or at a high temperature of 150 to 180°C.

The on-site heated asphalt mixture manufacturing method is to put the asphalt mixture packed in ton bags transported to the site into a heated mixer, and produce a goose asphalt mixture at a temperature of 180 to 220°C.

The on-site heated asphalt mixture of the present invention is manufactured by the method described above.

The on-site heated asphalt mixture construction method of the present invention comprises the steps of: putting first aggregate into a first mixer and heating it to 60 to 120°C; putting asphalt into the first mixer and mixing it; preparing a second aggregate; mixing the first aggregate, which is mixed so as to reduce the adhesive strength between the first aggregate and the asphalt, and the second aggregate with the asphalt, into the first mixer and mixing them for less than 60 seconds at room temperature; discharging the mixed material from the first mixer and stacking it so that moisture in the second aggregate can be removed by the heat of the first aggregate, and adjusting the moisture content to less than 1%, and then putting it into the second mixer; selectively adding at least one of additional asphalt, a thermoplastic resin, a primary process oil, an adhesive, a filler, and additionally added oil to the mixture of the second mixer and mixing it at room temperature; discharging the asphalt mixture prepared from the second mixer and packing it into a ton bag; The process of transporting the above-mentioned ton-bag asphalt mixture to a site; the process of spreading the above-mentioned ton-bag asphalt mixture on an aged asphalt concrete pavement; the process of simultaneously cutting and mixing the above-mentioned asphalt concrete pavement and the ton-bag asphalt mixture; the process of putting the cut and mixed asphalt concrete pavement and the ton-bag asphalt mixture into a mobile production facility, heating and mixing at 80 to 180°C, and producing an asphalt mixture on-site; and the process of spreading and compacting the above-mentioned asphalt mixture.

The on-site heated asphalt mixture construction method of the present invention comprises the steps of: spraying a regeneration additive on an aged asphalt concrete pavement surface, and cutting it at room temperature; mixing the cut material and a waterproof asphalt concrete additive by putting them into a mobile production facility including a heat mixer; laying the mixed material and compacting it to form a lower layer; heating the first aggregate to 60 to 120°C; mixing asphalt by putting it into the first mixer; preparing the second aggregate; mixing the first aggregate so that the adhesive strength between the first aggregate and the asphalt can be reduced, and the second aggregate with the asphalt by putting them into the first mixer and mixing them for less than 60 seconds at room temperature; discharging the mixed material from the first mixer and stacking it so that the moisture in the second aggregate can be removed by the heat of the first aggregate, and then putting it into the second mixer; The method includes: a process of selectively adding at least one of additional asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additional input oil to the mixture of the second mixer and mixing at room temperature; a process of discharging the asphalt mixture manufactured in the second mixer to manufacture a ton-bag asphalt concrete pavement, and transporting it to a site; and a process of putting the ton-bag asphalt concrete pavement into a mobile production facility including a heat mixer at the site, heating it to 80 to 180°C, mixing it, and spreading and compacting it on the lower layer to form an upper layer.

According to the present invention, the following effects can be obtained.

First, since it is used by simply heating it on site, it has the advantage of being easy to repair roads and can be easily used in island and mountainous areas where asphalt supply is difficult.

Second, there is an advantage in that an asphalt mixture of fine particles that can satisfy the characteristics required for low-noise paving can be produced on-site.

Third, the life of aged asphalt pavements can be extended by producing recycled asphalt on-site, laying it, and compacting it.

Figure 1 is a schematic drawing of a mobile asphalt mixture manufacturing device for manufacturing an on-site heated asphalt mixture of the present invention.
FIG. 2 is a drawing showing a first hopper divided by a partition wall, which is a main part of a mobile asphalt mixture manufacturing device for manufacturing an on-site heated asphalt mixture of the present invention.
Figure 3 is a drawing showing a heating unit, which is a main part of a mobile asphalt mixture manufacturing device for manufacturing an on-site heated asphalt mixture of the present invention.
Figure 4 is a cross-sectional view of the mixer section and the heating section, which are main parts of a mobile asphalt mixture manufacturing device for manufacturing an on-site heated asphalt mixture of the present invention, as viewed from above.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings, but the present invention is not limited or restricted by the embodiments. For reference, in this description, the same numbers refer to substantially the same elements, and the contents described in other drawings may be cited and described under this rule, and contents that are judged obvious to those skilled in the art or that are repeated may be omitted.

Hereinafter, the ton-backed asphalt mixture of the present invention and its manufacturing method, the on-site heated asphalt mixture using the same and its manufacturing method, and its construction method are described.

The reason why the tonback asphalt mixture of the present invention is necessary is as follows.

First, when repairing a road made of cement or asphalt pavement, the road can be repaired by overlaying a thin layer (pavement thickness of 0.5 to 3 cm) on top.

At this time, if asphalt of 5mm or less, which is difficult to produce at an asphalt production plant, is used for thin paving, the life of the road can be extended without generating waste. In addition, since ton-bag asphalt can be used by simply heating it on site using a mobile heated asphalt production facility, roads can be easily repaired.

In addition, in the case of island and mountainous areas where asphalt supply is difficult, ton-bag asphalt may be required even if it is coarse-grained.

Second, in the case of low-noise pavement, the pavement has many pores, and if these pores are formed small, a significant noise reduction effect can be achieved, so the use of fine aggregate is necessary.

Conventional asphalt concrete produced with existing asphalt concrete production facilities mainly handles 25mm, 20mm, 13mm, 10mm, etc., and when supplying low-noise asphalt concrete for paving, it is difficult to supply asphalt concrete with fine aggregate particles such as 4mm, 3mm, 2mm, 1.5mm with conventional asphalt concrete production facilities.

In addition, if fine aggregate is used, it is mixed with coarse particles, making construction difficult due to particles larger than the pavement thickness when laying in thin layers with an asphalt finisher.

Third, when recycling aged on-site asphalt concrete, the aged asphalt pavement is cut at room temperature (previously, a heated cutting method was used), but before cutting, ton-bag asphalt concrete mixed with regenerative additives is sprayed on the pavement (additional aggregate + asphalt + regenerative additives), and cut together, and then put into a mobile asphalt concrete production facility and heated only to produce regenerative asphalt concrete, which can be laid and compacted to extend the life of the aged asphalt pavement.

In this way, the tonbag asphalt mixture can be effectively used in low-noise pavement for extending the life of roads or reducing noise, as well as being a very efficient means for coloring asphalt or supplying asphalt to island areas.

Since the particles of tonback asphalt should not be bonded to each other before heating, it should be manufactured so that the particles do not stick to each other, and the aggregate should be dried.

However, in the case of recycling aged asphalt pavement on site, there is no need to go through a separate drying process because waste asphalt concrete that has already been dried in a clear day and in an atmospheric state is used. In other words, wet aggregate must be dried in the ton-bag asphalt concrete manufacturing process, but if dried aggregate (moisture content of 1% or less) is used, a separate heating process can be omitted.

Tonbag asphalt mixture is mixed with aggregates (new aggregates, recycled aggregates) in the first and second stages, and after discharge and storage, 30 to 70% of the total aggregate mix design amount is heated and mixed at 60 to 100℃ in an indirect or direct heating mixer.

The aggregate added in the second stage can be new aggregate or recycled (recycled) aggregate.

When adding new aggregate, the insufficient amount of asphalt (30-70%) is added in the first stage, and when adding recycled aggregate, only a small amount of asphalt is added additionally during the heating process considering the amount of asphalt contained in the recycled aggregate. However, the aggregate added in the second stage is mixed with new aggregate and recycled additives to prevent particle sticking.

The secondary aggregates are dried after being stacked by the residual heat from the primary heating process and mixer. After the heated aggregate mixture is discharged from the primary mixer, it cools after 12 hours or more, and the moisture content of the aggregates evaporates, reducing the moisture content of the aggregates to less than 1%. In other words, the moisture content of the heated aggregates decreases due to moisture evaporation as they cool.

Tonbag asphalt manufactured in the second stage can prevent aggregate particles from sticking together by adding more filler to the dried aggregate, and additional additives can also be added during the mixing process by adding filler.

The additive can be a process oil that mixes well with asphalt when heated without melting the asphalt itself. Depending on the product type, one or more of the aromatic type, naphtha type, and paraffin type can be selected and used singly or in combination in an appropriate amount.

The mobile asphalt production facility used on site includes a vehicle-type charging hopper and a mixer capable of indirect or direct heating. However, the mixer is equipped with a heat circulation combustion chamber to prevent smoke and dust generation.

These production facilities can be installed on cargo trucks or trailers for mobility.

As described above, the aggregate used in the tonbag asphalt mixture may be new aggregate or recycled aggregate.

New aggregates can be used in sizes from 19mm to 5mm, 13mm to 5mm, 10mm to 2.5mm, 8 to 1.2mm, 5mm to 1.2mm, and sizes 1 to 6. When used for non-permeable purposes, more stone powder is used, and recycled aggregates are mainly used in sizes of 25mm or less.

Once the new or recycled aggregate preparation is complete, the aggregate is placed into a direct or indirect heat mixer or dryer.

In the first stage, 30-70% is first put in and heated to 60-120℃, then 30-100% of the total design amount of asphalt for road paving is put in and mixed, and in the second stage, 30-70% of aggregate is mixed and discharged.

For the secondary aggregates, single-grained aggregates are used for low-noise purposes, recycled aggregates are used for regenerated purposes, and stone powder is used for dense-grained purposes.

If the discharged aggregate is stored for more than 12 hours, it will reach room temperature. During this process, moisture evaporates and the moisture content will reach 1% or less.

The reason why moisture evaporates is because the evaporation process requires a lot of energy.

For example, 538 kcal of heat is required to evaporate 1 kg of water at 100℃. If the moisture content of 1000 kg of aggregate is 1%, there is 10 kg of water, and 5380 kcal of heat is required to evaporate this aggregate at 100℃, so the moisture in the aggregate must be sufficiently evaporated.

When the moisture content reaches 1% or less at room temperature, it is put into a secondary mixer, and the remaining asphalt or thermoplastic resin is put in to manufacture a ton-bag asphalt mixture.

Tonbag asphalt mixture is packaged in tonbags of 500kg, 1000kg, 1500kg, and 2000kg, considering the convenience of use in the mixer used on site.

The thermoplastic resin described above is mixed by selecting at least one of SBS of elastomer, EVA, LDPE, and HDPE of plastomer.

Oil and filler may be added together with the thermoplastic resin, and as the oil, at least one of the process oils, aroma, naphtha, and paraffin oil, may be used. At least one of petroleum resin and rosin may be selected, and as the filler, at least one of calcium carbonate, lime powder, and slaked lime may be selected, and during the mixing process, at least one of the aroma, naphtha, and paraffin oils may be additionally selected and added and mixed as the process oil.

Thermoplastic resins and process oils can be used strategically as substitutes for asphalt in the secondary mixer, rather than being used in the primary mixer.

Thermoplastic resins and process oils are used in small quantities in new tonback asphalt and in large quantities in recycled tonback asphalt, and the amount added is adjusted according to the amount of recycled aggregate used.

Depending on the quality characteristics, rubber powder, wood powder, cellulose fiber, new PVC powder, recycled PVC powder, etc. may also be used.

When using wood flour and cellulose fibers, water-soluble latex or water-soluble acrylic, urethane, EVA, etc. are absorbed into the wood flour and cellulose fibers, thereby improving the adhesive strength and bonding strength, and thus improving the quality. For 100 parts by weight of wood flour and cellulose fibers, 10 to 100 parts by weight of latex, etc. are mixed and absorbed.

The ton-bag asphalt mixture (called ton-bag asphalt concrete, premix asphalt concrete, and instant asphalt concrete) manufactured through the above-described process is transported to the site and used to manufacture an asphalt mixture.

Tonbak asphalt is fed through the hopper of a heating mixer and heated to 80 to 180°C for the production of asphalt mixtures. When producing medium-low temperature asphalt mixtures, the temperature is controlled to 80 to 135°C, when producing modified asphalt, to medium temperature 120 to 150°C, and when producing high temperature goose asphalt, to 150 to 180°C. The temperature is controlled to 180 to 220°C to manufacture the product according to the characteristics of each product.

The asphalt produced in this way is laid using manpower or an asphalt finisher, and compacted with a roller.

If there is a need to impart color to asphalt produced on site, during the first heating process of the tonbag asphalt production process, asphalt for road paving is not used, and only aggregate is heated, and then only thermoplastic resin is used in the second mixer to manufacture tonbag asphalt.

Describes a method for recycling field-aged asphalt into waste asphalt concrete.

There are two methods for recycling waste asphalt, which is an aged packaging material, in the field: the remix method and the repave method.

The remix method is a method of mixing and installing recycled additives and new asphalt concrete. When recycling aged asphalt pavement on site, it is a method of mixing recycled additives, i.e. process oil, into new aggregate according to the mixing design while considering the particle size of waste asphalt concrete cut in the process of manufacturing ton-bag asphalt concrete.

The ton-bag asphalt concrete manufactured in this way is placed on aged asphalt by manpower, a bobcat, a forklift, etc., and is mixed with aged cut asphalt concrete during the road surface cutting process, put into a mobile production facility, heated, mixed, and then placed and compacted.

The repave method is a method in which, during the process of cutting aged asphalt pavement, only a regeneration additive is sprayed to cut the road surface, and then the road surface is cut, and then the asphalt is placed in a mobile production facility, and the lower layer is formed by compacting and then heated ton-bag asphalt concrete is immediately paved on top of that to form an upper layer. This method increases the durability of the pavement and enables thin-layer paving with functional asphalt concrete, i.e. low-noise asphalt concrete or colored asphalt concrete.

In the repave method, a waterproof asphalt additive can be used in the recycled asphalt forming the lower layer to further improve the durability of the pavement, thereby preventing rainwater, etc. that has permeated through the low-noise asphalt pores from seeping into the lower layer due to the waterproof asphalt layer.

Therefore, the lower layer is composed of a waterproof asphalt layer using aged asphalt, and the upper layer is composed of a fine-grained, low-noise asphalt layer, which enables low-noise paving and improved durability of the pavement.

In this process, the ton-bag asphalt used in forming the upper layer is put into a mobile production facility and heated to 80 to 180°C, thereby being manufactured into on-site heated asphalt, and the on-site heated asphalt manufactured in this way is laid and compacted to form the upper layer.

(Example 1)

Asphalt (dense grain) is produced on top of the concrete in the island area, laid and compacted to a thickness of 5 cm. The aggregate specification is 13 mm (WC-2), and 50% of the recycled (circulated) aggregate is used.

A. Manufacturing of tonback asphalt

(1) Aggregate particle size (WC-2)

(2) Mixing ratio

※ First, heat and mix the new aggregate and AP-5 in a heated mixing mixer at 100℃, then add the recycled aggregate, mix for 5 seconds, and then discharge.

※ Function rate after 12 hours: 0.3%

(3) Secondary mixer (room temperature mixer)

※ AP amount: <Recycled aggregate 500kg*0.05(5%)= 25kg> + <Additional AP-5 22kg> + <Resin mixture 0.3kg + 0.5kg + 1.0kg = 1.8kg> + <Process oil 3.0kg> = 51.8kg

(4) Packed in 2-ton units in ton bags

B. On-site production

(1) Equipment

※ Mobile asphalt production facility (vehicle)

※ 2ton/batch

※ Production temperature: 125℃

※ 2-ton-packed ton bags of asphalt are continuously fed into the aggregate hopper of the mobile asphalt production facility using a forklift, heated to 125℃ for continuous, automatic production, and then loaded onto dump trucks using a belt conveyor.

※ Transport it to the site, install it with a finisher, and compact it with a roller.

D. Test results

(Example 2)

A low-noise pavement is constructed on the road. It is a two-layer pavement using colored asphalt, with the lower layer being composed of 13 mm ton-bag asphalt and the upper layer being composed of 2.5 mm aggregate (No. 3) ton-bag asphalt. Ton-bag asphalt is used for low noise (13 mm, void ratio 19% or more, No. 3 ton-bag asphalt with a void ratio of 10-15%), water retention (water retention: to increase moisture retention, the lower layer uses 13 mm, and the upper layer uses No. 3 ton-bag asphalt with fine voids of 2.5 mm), and heat insulation (light gray).

Two mobile mixers are used, and for 13mm asphalt concrete, a large production facility with a capacity of 2 tons/batch is used, while for No. 3 asphalt concrete, a small production facility with a capacity of 1 ton/batch is used.

A. Manufacturing of tonback asphalt

(1) 13mm drainage asphalt

1) Entry

2) Mixing ratio

① 1st mixer

② Secondary mixer

※ AP quantity: 18kg + (SBS 3kg + LDPE 2kg + EVA 4kg + petroleum resin 12kg) + (process oil 11kg) = 50.0kg

3) Packed in 2-ton units in ton bags

(2) Ascon No. 3

※ Since it is dried, the drying process is omitted.

1) Mixing ratio

※ Mix the above materials and pack them in 1000kg ton bags.

B. On-site production

※ 13mm ton-bag asphalt is fed into the hopper of a large mobile asphalt production facility, fed into a heating mixer, produced at 140℃, fed into an asphalt finisher, heated and mixed, and then laid and compacted.

※ When the surface temperature of 13mm drainage asphalt becomes 60℃ or lower, No. 3 ton-bag asphalt is fed into the hopper of a small mobile asphalt production facility and fed into a heating mixer to produce No. 3 asphalt by heating and mixing, and then laid and compacted using an asphalt finisher.

D. Test results

(Example 3)

A. On-site regeneration asphalt pavement

(1) Mixed production and laying method of aged asphalt pavement and new asphalt concrete (remix method)

※ 20% of new ton-backed asphalt is used, and this is laid on top of the cut aged asphalt pavement with a bobcat. The aged asphalt is cut together with the new ton-backed asphalt and piled on the road surface. The mixed recycled asphalt is then fed into a mobile heating mixer, heated and mixed, and paved with a finisher.

(2) Separate paving method of on-site asphalt concrete (lower layer) and surface new asphalt concrete (upper layer) (repave method)

※ Spray a regenerative additive on aged asphalt pavement, cut it, put it in a large mobile heated mixer with a waterproof asphalt additive, spread and compact it, and pave the regenerative waterproof asphalt, and overlay 2cm of No. 1 (4mm) low-noise toneback asphalt (low-noise asphalt).

B. Mixed production and laying method of aged asphalt pavement and new asphalt concrete (remix method)

(1) Synthetic particle size distribution

※ Synthetic particle size distribution of 80% aggregate and 20% new aggregate (13 mm) of road surface cutting asphalt

(2) Mixing ratio

※ T=5cm standard

※ 11,600kg/a (amount of recycled aggregate generated per a) ÷ 800kg/ton (amount of recycled aggregate used per ton) = 14.5ton/a

※ New (supplementary) Ascon during production

(2,000 ÷2,900) × 100 = 69%, so 1a × 0.69(69%) = 0.69a(69m ² )

Therefore, 2 tons of new asphalt is used per 0.69a.

(3) Production and construction process

※ In the section where ton-bag asphalt is to be paved, 2 tons of ton-bag asphalt is laid per 0.69a and spread (layed) with a bobcat. The extension length of the section with a width of 3.5m is calculated as follows.

^69m2 (new asphalt 2ton construction area) ÷3.5m(width) = 19.7m(extension)

※ Cut the spread-out tonback asphalt into 5cm thick pieces using a road cutter and stack them with a bobcat.

※ It is put into the hopper of a mobile asphalt production facility (vehicle) using a excavator, continuously and automatically weighed, heated to 135℃, and then installed using an asphalt finisher.

※ Spray tack coat before laying with a finisher, and operate the road heating system attached to the mobile production vehicle to heat the cut road surface and tack coat to evaporate moisture and improve adhesion.

※ After laying, compact with a roller. (Compact in the order of macadam, tandem, and tire.)

The above mixing amount of regenerative additive is used to improve the quality of aged asphalt and is applied to ton-bag asphalt by mixing it with new aggregate.

(4) Test results

※ Based on 75 pledges

D. Separate paving method of on-site regenerated asphalt (lower layer) and surface new asphalt (upper layer) (repave method)

(1) Regenerated asphalt of the lower layer (cut asphalt: manufactured from waterproof asphalt)

1) Setting the mixing ratio

※ The reason why only oil is used in the regeneration additive is because a modifier is mixed in the waterproof asphalt additive.

2) Production

① Spray a regeneration additive on the aged asphalt surface and cut it at room temperature.

※ 6kg per ton, T=4cm, recycled asphalt 9.28ton/a ×6kg/ton = 55.68kg/a

※ When cut at room temperature, the aggregate is crushed and the particle size is finely packed, making it suitable for waterproof particle size distribution. (Quality and waterproofing effect are important for waterproof asphalt)

② The cut material together with the oil is placed into the hopper of a mobile asphalt production vehicle and placed into a heated mixing mixer, while a waterproof asphalt additive is also added and mixed while heating at 150℃.

③ The heated mixed material is spread on a finisher and compacted with a roller.

④ When the surface temperature falls below 60℃, lay the upper layer.

(2) New asphalt (thin layer paving) on the upper floor

1) Mixing ratio (tonback asphalt low noise)

① 1st mixer

※ After mixing the above ingredients, store for 24 hours and cool to room temperature. The temperature is room temperature, dry aggregate is used, and the moisture content is 1%.

② Secondary mixer

※ AP content: (AP-5 25kg) + (SBS 5kg + EVA 6kg + petroleum resin 12kg + process oil 10kg) = 58kg

※ Wood powder: 3.5kg of wood powder + 1.5kg of latex (based on 50% solid content) mixed absorption

※ Aged rubber powder is made by mixing waste tire powder of 30 mesh or less and aroma oil and storing it for more than 24 hours (aroma oil is used in an amount of 10% of the rubber powder).

※ The above materials are packed in 2-ton bags and transported to the site.

2) Production

※ 4mm ton-bag asphalt is fed into the hopper of a mobile asphalt production facility, then fed into a heating mixer and heated to 125℃ to produce 4mm low-noise asphalt.

3) Installation

※ The produced asphalt concrete is placed into an asphalt paving finisher, laid, and compacted with a roller.

4) Tack coat

※ By spraying rubberized asphalt on top of the recycled waterproof asphalt to improve adhesion, the lifespan of the pavement can be extended by paving 4mm low-noise asphalt.

Below, a mobile asphalt mixture manufacturing device capable of manufacturing an asphalt mixture on site using the ton-bag asphalt mixture of the present invention is described.

Figure 1 is a schematic drawing of a mobile asphalt mixture manufacturing device.

As illustrated in FIG. 1, the mobile asphalt mixture manufacturing device includes a first hopper (100) into which aggregate is fed, a first supply conveyor belt (200) for transporting aggregate discharged from the first hopper (100), a dryer (300) for drying moisture in the aggregate and performing primary heating, a second supply conveyor belt (400) for transporting dried aggregate discharged from the dryer (300), an asphalt supply unit (500) for adding asphalt to aggregate transported along the second supply conveyor belt (400), a mixer unit (600) for mixing and heating the aggregate and asphalt transported along the second supply conveyor belt (400) to manufacture an asphalt mixture, and a heating unit (700) for supplying heated combustion air to the mixer unit (600) to suppress hardening of the asphalt mixture.

At this time, the dryer (300) is detachably coupled to the main trailer (10) as needed, and when the dryer (300) is removed, the first supply conveyor belt (200) is configured to supply the aggregate directly to the second supply conveyor belt (400).

The first hopper (100) is preferably placed forward in the direction of travel of the main trailer (10). This is because the first hopper (100) is where aggregate, which is a material for an asphalt mixture, is put in, and is placed so that the asphalt mixture is completed as it moves toward the rear of the main trailer (10), thereby minimizing unnecessary transport of the asphalt mixture or its materials, facilitating temperature control, and reducing manufacturing costs.

Figure 2 is a drawing showing a first hopper divided by a partition wall, which is a main part of a mobile asphalt mixture manufacturing device.

As shown in Fig. 2, it is preferable that the first hopper (100) be divided into a plurality of areas by one or more partitions (110), because new aggregates, waste aggregates, and various additives can be separately fed into one first hopper (100), thereby enabling smooth operation.

Various additives may be injected through the first hopper (100) or sprayed (recycled additives) during the process of cutting the road surface to prepare waste aggregate.

Additives may include, for example, fillers, modifying additives, process oils, and elastic chips. The filler is composed of at least one selected from cement, slaked lime, and quicklime, and the process oil is prepared by including at least one selected from aromatic oil, paraffin oil, and naphtha oil.

Additives are not limited to the additives listed above, and various additives may be selectively used depending on requirements such as the PG grade and specifications of the pavement to be paved.

More preferably, the mobile asphalt mixture manufacturing device may further include a second hopper (800) into which waste aggregate and additives generated on site are injected, and a third supply conveyor belt (900) that transports waste aggregate from the second hopper (800) to the dryer (300).

At this time, when the dryer (300) is removed, the third supply conveyor belt (200) is configured to supply waste aggregate directly to the second supply conveyor belt (400).

At this time, it is preferable to input new aggregate through the first hopper (100) and to input waste aggregate through the second hopper (800). This is because the input amounts of new aggregate and waste aggregate can be easily adjusted, and the operation of the dryer (300) can be controlled due to differences in moisture content between the waste aggregate and new aggregate.

Specifically, since the water-cutting method is usually used when cutting the road surface on site to prepare waste aggregate, the prepared waste aggregate may contain a large amount of moisture, so it can be adjusted to be injected separately from new aggregate as needed.

Accordingly, the operation of the dryer (300) can be selectively controlled according to the moisture content of the aggregate fed into the dryer (300), thereby preventing an increase in cost due to unnecessary heating, etc.

At this time, a first waste aggregate discharge port is provided on one side of the second hopper (800), and the third supply conveyor belt (900) transports waste aggregate discharged through the first waste aggregate discharge port to the dryer (300).

In addition, the second hopper (800) may further include a second waste aggregate discharge port formed on a surface opposite to the first waste aggregate discharge port, and a waste aggregate screen (not shown) arranged inside to slope downward from the first waste aggregate discharge port toward the second waste aggregate discharge port.

Accordingly, waste aggregate fed into the second hopper (800) is sorted by particle size, and waste aggregate within the standard particle size passes through the waste aggregate screen and is discharged through the first waste aggregate discharge port and transported to the dryer (300) along the third supply conveyor belt (900), while waste aggregate that does not meet the standard particle size is discharged outside the second hopper (800) through the second waste aggregate discharge port along the waste aggregate screen formed to be inclined downward.

Accordingly, by having the worker re-introduce the asphalt mixture into the second hopper (800) or select it after a separate crushing process, the quality of the manufactured asphalt mixture can be improved, and further, the quality of the pavement can be improved.

In addition, the second hopper (800) can be divided into multiple parts through partitions or the like so that waste aggregate and additives can be sorted and fed according to type, similar to the first hopper (100) described above.

More preferably, the mobile asphalt mixture manufacturing device may further include an auxiliary trailer (20) that is selectively connectable to the main trailer (10), but is equipped with moving means on both sides so that it can move along the main trailer (10).

At this time, the second hopper (800) and the third supply conveyor belt (900) may be installed on the auxiliary trailer (20) and configured as one piece by being combined with the main trailer (10). At this time, it is preferable that the third supply conveyor belt (900) be installed so that its inclination angle can be adjusted so that waste aggregate can be supplied to the inlet of the dryer (300) installed on the main trailer (10).

Accordingly, the inclination angle of the third supply conveyor belt (900) can be adjusted according to conditions such as the size and location of the dryer (300) installed on the main trailer (10), thereby facilitating smooth assembly.

The transport means installed on both sides of the main trailer (10) and auxiliary trailer (20) may optionally be applied to various transport means capable of moving the main trailer (10) and auxiliary trailer (20), such as wheels, wheels, and rollers.

The dryer (300) is intended to remove moisture contained inside aggregate by first heating aggregate made of waste aggregate or new aggregate, and is composed of a dryer body (310) provided in a tube shape with both ends open, a dryer burner (320) that generates hot air to heat the dryer body (310) to dry aggregate contained inside the dryer body (310), and a dryer circulation path (330) that circulates the hot air generated in the dryer burner (320).

The dryer body (310) has an aggregate inlet formed at the front of the main trailer (10) and an aggregate outlet formed at the rear of the main trailer (10).

At this time, it is preferable that the dryer body (310) be installed rotatably to facilitate movement and drying of the aggregate.

According to one embodiment of the present invention, a dryer circulation path (330) is configured to be connected to both ends of a dryer body (310) so as to connect an aggregate inlet and an aggregate outlet, and a dryer burner (320) is installed on the dryer circulation path (330).

Accordingly, the hot air generated in the dryer burner (320) is supplied to the aggregate inlet of the dryer body (310) along the dryer circulation path (330), and moves toward the aggregate outlet together with the aggregate while first heating and drying the aggregate.

At this time, the hot air, whose temperature has been lowered while heating the aggregate, moves through the dryer circulation path (330) installed at the aggregate outlet, is reheated by the dryer burner (320), and is resupplied to the dryer body (310) through the aggregate inlet.

Accordingly, the dryer burner (320) has the effect of minimizing energy consumption and further reducing manufacturing costs by recovering some of the hot air having a higher temperature than the surroundings and reheating it to supply it.

Aggregates can be new aggregates, waste aggregates, or mixed aggregates of new and waste aggregates, and the mixing ratio can be adjusted depending on the characteristics of the road to be paved.

As described above, the dried aggregate is transported to the mixer unit (600) installed at the rear of the main trailer (10) along the second supply conveyor belt (400). At this time, it is preferable that the length of the second supply conveyor belt (400) be installed to the minimum length.

This is because the cost of the second and third heating stages can be reduced by minimizing the exposure of the first heated aggregate to the air during drying and cooling.

Meanwhile, the asphalt supply unit (500) is installed near the second supply conveyor belt (400) to supply first heated asphalt to the aggregate transported along the second supply conveyor belt (400).

More specifically, the asphalt supply unit (500) includes an asphalt tank (510) in which asphalt is received, and an asphalt burner (520) installed on one side of the asphalt tank (510) to heat the asphalt received inside the asphalt tank (510).

Accordingly, when manufacturing an asphalt mixture, an asphalt burner (520) first heats the asphalt contained in an asphalt tank (510) and supplies it to a second supply conveyor belt (400).

More preferably, the asphalt tank (510) further includes an asphalt stirring means (not shown) for stirring the asphalt contained therein so that the asphalt is evenly heated.

As described above, the first heated aggregate and asphalt are transported to the mixer unit (600) along the second supply conveyor belt (400).

The mixer section (600) heats and mixes aggregate and asphalt mixture to produce an asphalt mixture, and specifically, it is composed of one or more screw mixers (610) that mix and transport aggregate and asphalt introduced into the interior, and a main mixer (620) that is placed below the screw mixer (610) and mixes aggregate and asphalt supplied from the screw mixer (610) while secondarily heating them to produce an asphalt mixture.

Figures 3 and 4 are cross-sectional views for explaining the mixer section and the heating section.

As shown in FIGS. 3 and 4, the screw mixer (610) is configured with a conveying screw (611) installed inside an insulated body to convey aggregate and asphalt.

At this time, it is preferable that the body covering the conveying screw (611) has an insulating layer formed on the inside, such as glass fiber, because this prevents the primarily heated asphalt and aggregate from being cooled by the outside air, thereby improving the quality of the asphalt mixture being manufactured and enhancing productivity.

The screw mixer (610) may be provided with a multi-layer structure of one or more layers depending on the production requirement of the mixture of aggregate and asphalt. At this time, it is preferable that the screw mixers (610) adjacent to each other in the vertical direction are installed to transport the aggregate and asphalt in opposite directions to move the mixture of aggregate and asphalt in a zigzag direction.

Accordingly, the aggregate and asphalt are mixed and moved in the forward direction along multiple conveying screws (611), then mixed and moved in the reverse direction, and then mixed and moved in the forward direction again, so that the asphalt and aggregate can be sufficiently mixed.

The screw mixer (610) can adjust the number of conveying screws (611) depending on the amount of asphalt mixture to be produced.

Aggregate and asphalt mixed through a screw mixer (610) are supplied into the main mixer (620) and mixed while being secondarily heated to form an asphalt mixture.

The screw mixer (610) and the asphalt mixture are heated using combustion gas (G) supplied from the heating unit (700), which will be described in detail in the description of the heating unit (700).

The heating unit (700) is installed on the side of the screw mixer (610) and is configured to include a chamber (710) having a flow path (711) inside, a blower (720) that mixes exhaust gas discharged from the main mixer (620) and outside air and supplies the mixture to the flow path (711) of the chamber (710), a combustion chamber (730) that is installed inside the chamber (710) and receives air from a plurality of locations from the flow path (711), and a burner (740) that supplies combustion gas (G) that is ignited after mixing air and fuel into the combustion chamber (730).

At this time, the chamber (710) and the combustion chamber (730) are configured as a kind of double chamber, and a combustion chamber (730) separated by a partition (733) is provided inside the chamber (710), and the remaining space excluding the combustion chamber (730) functions as a flow path (711) through which air delivered from the blower (720) flows.

In addition, the fluid path (711) acts as a buffer that separates the combustion chamber (730) from the wall surface of the chamber (710), thereby performing the function of an insulating layer that prevents the combustion gas (G) inside the combustion chamber (730) from being cooled by the external temperature.

Through this, the combustion gas (G) flowing through the combustion chamber (730) can be supplied to the main mixer (620) with the heat content preserved as much as possible.

The burner (740) is installed outside the chamber (710) and is configured to supply heated combustion gas (G) by mixing, for example, fuel such as oil or gas and air and then igniting it. The burner (740) and the combustion chamber (730) are connected through a combustion pipe (741), and this combustion pipe (741) can be formed in the shape of a pipe penetrating the chamber (710).

As previously explained, the combustion chamber (730) is spaced apart from the wall surface of the chamber (710) and has a flow path (711) provided therebetween, and the combustion pipe (741) is formed in the shape of a pipe penetrating the spaced apart gap.

The mixture of fuel and air ignited in the burner (740) is primarily combusted in the combustion pipe (741) and thus increases in heat. However, since the volume of the burner (740) and the combustion pipe (741) is relatively small and the time taken for the combustion gas (G) to pass through these components is short, the combustion gas (G) is not completely combusted and remains in an incomplete combustion state.

Therefore, in order to completely combust the incompletely combusted combustion gas (G) and further increase the heat content, additional air is supplied to the combustion chamber (730).

That is, an air supply port (731) and an open area (732) are provided at separate locations spaced apart from each other in a partition wall (733) that divides the combustion chamber (730). The air supply port (731) is provided on one side of the wall of the combustion chamber (730) connected to the combustion pipe (741), and the open area (732) is provided on the wall on the opposite end of the combustion pipe (741).

By providing an air supply port (731) and an open area (732) in the bulkhead (733) in this way, air supplied from the blower (720) can flow into the combustion chamber (730) through the flow path (711).

The combustion gas (G) that is primarily combusted in the combustion pipe (741) is diffused inside the combustion chamber (730) and reacts with the air supplied through the air supply port (731) to cause secondary combustion, and then moves toward the other side of the combustion chamber (730) and reacts again with the air supplied through the open area (732) to cause thirdary combustion.

By burning the fuel in three stages in the combustion pipe (741), one end of the combustion chamber (730), and the other end of the combustion chamber (730), the fuel is completely combusted and the maximum amount of heat from the fuel can be extracted, thereby reducing fuel consumption and supplying hot air with the maximum amount of heat to the main mixer (620).

The combustion gas (G) completely combusted in this way is introduced into the main mixer (620) through the combustion gas supply port (734) formed at the lower end of the chamber (710), thereby heating the aggregate and asphalt introduced into the main mixer (620) to maintain fluidity and provide heat so that they can be well mixed.

After heating the aggregate and asphalt, the combustion gas (G) is discharged to the outside through the exhaust pipe (621) installed in the main mixer (620), and part or all of the combustion gas (G) discharged through the exhaust pipe (621) is introduced into the blower (720) through the return pipe (721).

The blower (720) sucks in relatively high temperature combustion gas (G) recovered through the recovery pipe (721) and a portion of the outside air and introduces them back into the flow path (711) of the chamber (710).

This is to recycle the heat remaining in the recovered combustion gas (G) and supply it back to the main mixer (620). The recovered combustion gas (G) can be reheated in the combustion chamber (730) and resupplied to the main mixer (620).

At this time, if only the recovered combustion gas (G) is injected back into the combustion chamber (730), it is difficult to completely combust the fuel because the amount of oxygen inside the combustion gas (G) is small, so additional outside air is sucked in from the blower (720) to supply oxygen. Through this, the heat of the combustion gas (G) can be utilized to the maximum extent and supplied to the main mixer (620).

As described above, the asphalt mixture manufactured in the main mixer is discharged from the rear end of the main trailer (10), and the asphalt mixture can be spread on the road surface.

As described above, when the asphalt mixture is laid on the road surface, it is compacted using a roller or similar, and then cured to complete the road paving.

More preferably, the mobile asphalt mixture manufacturing device according to one embodiment of the present invention further includes a road heating unit (11) installed under the main trailer (10) to heat the road surface on which the asphalt mixture is to be laid.

More specifically, the road surface heating unit (11) includes a road surface heating body (11a) in the shape of a body with an open bottom and one or more road surface heating burners (11b) installed on one side of the road surface heating receiver to supply hot air into the inside of the road surface heating body (11a).

Accordingly, by having the road surface heating unit (11) preheat the road surface to be paved before spreading the asphalt mixture on the road surface, the asphalt mixture spread on the road surface can be prevented from being damaged or having its adhesion to the road surface reduced due to rapid temperature changes, thereby improving the pavement quality.

Below, a method for manufacturing an asphalt mixture on site using a mobile asphalt mixture manufacturing device is described.

A method for manufacturing an asphalt mixture according to one embodiment of the present invention includes a process for preparing waste aggregate, a process for preparing aggregate by drying and mixing the waste aggregate, new aggregate, and an additive, a process for preparing asphalt, a process for preparing a first mixture while heating the prepared asphalt and aggregate, and a process for manufacturing an asphalt mixture by mixing the first mixture while heating it a third time.

The process of preparing waste aggregate can be done by cutting and crushing the road surface to be paved on site, and more specifically, the road surface cutting can be done using a water-spraying cutting method to prevent dust, etc. from flying around.

Once the road surface cutting is completed, the cut road surface is crushed into a predetermined size according to the aggregate particle size set in advance to prepare waste aggregate.

When waste aggregate is prepared as described above, new aggregate, waste aggregate, and additives are fed through the first and second hoppers (100, 800), respectively, and the fed raw materials are transported to the dryer (300) along the first and third supply conveyor belts (200, 900).

In the present invention, the additive may include at least one of SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene-Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene), rosin, wax, process oil, and rubber powder.

Meanwhile, waste aggregate fed into the second hopper (800) can be configured to be further sorted by particle size through a screen installed inside and then transported through a third supply conveyor belt (900).

As described above, when new aggregate, waste aggregate, and additives are supplied into the dryer body (310), the dryer heats and dries the new aggregate, waste aggregate, and additives using the dryer burner (320) and the dryer circulation path (330) to prepare aggregate.

The process of preparing asphalt is performed by heating asphalt contained in an asphalt tank (510) using an asphalt burner (520).

As described above, the heated aggregate and asphalt are loaded onto the second supply conveyor belt (400) and transported to the screw mixer (610).

At this time, a plurality of screw mixers (610) are arranged so that they are stacked in the height direction and alternately rotated in the horizontal forward and reverse directions, and the material fed into the upper screw mixer (610) through the second supply conveyor belt (400) is mixed and supplied to the main mixer (620).

At this time, the main mixer (620) receives high-temperature combustion gas from the heating unit (700) and reheats the aggregate heated in the dryer (300) and the asphalt heated in the asphalt supply unit (500), thereby maintaining fluidity and assisting mixing. In this process, the heating unit (700) can supply additional air to the combustion gas several times to combust the fuel close to complete combustion.

To explain the combustion process in more detail, primary combustion of fuel takes place in the burner (740), and the combustion gas generated by the primary combustion undergoes secondary combustion inside the combustion chamber (730). Combustion can also be assisted by introducing new outside air into the combustion chamber (730) and additionally supplying oxygen.

Afterwards, the combustion gas discharged through secondary combustion in the combustion chamber (730) is supplied with outside air again to cause a tertiary combustion, and the tertiary combustion gas is supplied to the main mixer (620) to heat the primary mixture of asphalt and aggregate inside the main mixer (620).

By combusting the combustion gas in this way in three stages, the combustion rate can be maximized and combustion can be performed close to conversion combustion, thereby maximizing the utilization of the fuel's calorific value.

The third combustion combustion gas can be discharged to the outside through the exhaust pipe (621) after heating the first mixture of asphalt and aggregate in the main mixer (620).

Some of the combustion gas discharged through the exhaust pipe (621) may be mixed with outside air supplied for secondary combustion and tertiary combustion and supplied again to the combustion chamber (730).

In this way, by re-supplying the discharged combustion gas, the heat remaining in the combustion gas can be recycled, and by also burning the combustible material volatilized from the asphalt, the heat of the combustion gas supplied to the main mixer (620) can be maximized.

The mixture manufactured as described above is finally heated and mixed in the main mixer (620) to manufacture an asphalt mixture, and the work is completed.

Although the present invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made thereto without departing from the spirit and scope of the present invention as set forth in the claims below.

10: Main trailer 11: Road heating unit
11a: Road heating body 11b: Road heating burner
20: Auxiliary trailer 100: 1st hopper
200: 1st supply conveyor belt 300: Dryer
310: Dryer body 320: Dryer burner
330: Dryer circulation path 400: Second supply conveyor belt
500: Asphalt supply unit 510: Asphalt tank
520: Asphalt burner 600: Mixer section
610: Screw mixer 620: Main mixer
700: Heating section 710: Main chamber
711: Flow path 720: Blower
730: Combustion chamber 731: Air supply port
732: Open Area 740: Burner
741: Combustion pipe 800: Second hopper
900: 3rd supply conveyor belt

Claims (13)

The process of putting the first aggregate into the first mixer and heating it to 60~120℃;
The process of mixing asphalt by putting it into the first mixer;
Process of preparing second aggregate;
A process of mixing the first aggregate and the second aggregate into the asphalt so that the adhesion between the first aggregate and the asphalt can be reduced, and mixing them in the first mixer for less than 60 seconds at room temperature;
A process of discharging mixed materials from the first mixer and stacking them so that the moisture in the second aggregate can be removed by the heat of the first aggregate, adjusting the moisture content to within 1%, and then putting them into the second mixer;
A process of adding at least one of additional asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additional input oil to the mixture of the second mixer and mixing at room temperature; and
A method for manufacturing a ton-bag asphalt mixture, comprising: a process of discharging an asphalt mixture manufactured in the second mixer and packaging it into ton-bags.
In claim 1,
A method for manufacturing a ton-bag asphalt mixture, characterized in that the second aggregate is any one of single-grain aggregate, recycled aggregate, and stone powder.
In claim 2,
The thermoplastic resin is input by selecting at least one from among SBS, EVA, LDPE, and HDPE, the oil is input by using one from among aroma, naphtha, and paraffin oil as a process oil, the adhesive is input by selecting at least one from among petroleum resin and rosin, and the filler is input by selecting at least one from among calcium carbonate, lime powder, and hydrated lime, wherein the oil is input by being divided into primary use oil and additional input oil, and the additional input oil is input by selecting at least one from among aroma oil, naphtha oil, and paraffin oil. A method for manufacturing a tonbag asphalt mixture.
In claim 3,
The above first aggregate is 30 to 70% of the total aggregate usage, and the above second aggregate is 70 to 30% of the total aggregate usage.
A method for manufacturing a ton-bag asphalt mixture, characterized in that the thermoplastic resin and process oil are added in different amounts depending on the amount of recycled aggregate used.
In claim 4,
At least one of rubber powder, wood powder, cellulose fiber, new PVC powder, and recycled PVC powder is further mixed,
A method for manufacturing a ton-bag asphalt mixture, characterized in that when using the above wood flour and cellulose fiber, 10 to 100 weight parts of an emulsion of latex, acrylic, urethane, and EVA are additionally mixed with 100 weight parts of the above wood flour and cellulose fiber.
A ton-bag asphalt mixture manufactured by the method of any one of claims 1 to 5.
The process of putting the first aggregate into the first mixer and heating it to 60~120℃;
The process of mixing asphalt by putting it into the first mixer;
Process of preparing second aggregate;
A process of mixing the first aggregate and the second aggregate with the asphalt so that the adhesive strength of the first aggregate and the asphalt can be reduced, and mixing them in the first mixer for less than 60 seconds at room temperature;
A process of discharging mixed materials from the first mixer and stacking them so that the moisture in the second aggregate can be removed by the heat of the first aggregate, adjusting the moisture content to within 1%, and then putting them into the second mixer;
A process of adding at least one of additional asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additional input oil to the mixture of the second mixer and mixing at room temperature;
The process of discharging the asphalt mixture manufactured in the second mixer and packaging it into ton bags;
The process of transporting asphalt mixture packed in ton bags to the site; and
A method for producing an asphalt mixture by on-site heating, comprising the steps of putting an asphalt mixture packed in ton bags transported to a site into a heating mixer and heating it to 100 to 180°C to produce an asphalt mixture on-site.
In claim 7,
A method for manufacturing an asphalt mixture by on-site heating, characterized in that an asphalt mixture packed in ton bags transported to the site is put into a heating mixer and a medium-low temperature asphalt mixture is produced at a temperature of 80 to 135°C.
In claim 7,
An on-site heated asphalt mixture manufacturing method characterized by putting an asphalt mixture packed in ton bags transported to a site into a heating mixer and producing a modified asphalt mixture at a medium temperature of 120 to 150°C or a high temperature of 150 to 180°C.
In claim 7,
A method for producing an asphalt mixture by on-site heating, characterized in that an asphalt mixture packed in ton bags transported to the site is put into a heating mixer and a goose asphalt mixture is produced at a temperature of 180 to 220°C.
A field heated asphalt mixture prepared by any one of the methods of claims 7 to 11.
A process of putting first aggregate into a first mixer and heating it to 60 to 120°C; A process of putting asphalt into the first mixer and mixing it; A process of preparing a second aggregate; A process of mixing the first aggregate, which is mixed so as to reduce the adhesive strength between the first aggregate and the asphalt, and the second aggregate with the asphalt, into the first mixer and mixing them for less than 60 seconds at room temperature; A process of discharging the mixed materials from the first mixer and stacking them so that the moisture in the second aggregate can be removed by the heat of the first aggregate, and adjusting the moisture content to less than 1%, and then putting them into the second mixer; A process of selectively adding at least one of additional asphalt, a thermoplastic resin, a primary process oil, an adhesive, a filler, and additionally added oil to the mixture of the second mixer and mixing them for less than 60 seconds at room temperature;
The process of discharging the asphalt mixture manufactured in the second mixer and packaging it into ton bags;
The process of transporting the above-mentioned ton-bag asphalt mixture to the site;
The process of spreading the above-mentioned ton-bag asphalt mixture on an aged asphalt concrete pavement;
A process of simultaneously cutting and mixing the above asphalt concrete pavement and the ton-bag asphalt mixture;
The process of producing an asphalt mixture on site by putting the cut and mixed asphalt concrete pavement and the ton-bag asphalt mixture into a mobile production facility, heating and mixing at 80 to 180°C; and
A method for constructing an asphalt mixture by on-site heating, comprising the process of spreading and compacting the above asphalt mixture.
The process of spraying a regeneration additive on an aged asphalt concrete pavement surface and cutting it at room temperature;
The process of mixing cut materials and waterproof asphalt additives by putting them into a mobile production facility including a thermal mixer;
The process of laying and compacting mixed materials to form a lower layer;
A process of putting first aggregate into a first mixer and heating it to 60-120℃; A process of putting asphalt into the first mixer and mixing it; A process of preparing a second aggregate; A process of putting the first aggregate mixed so that the adhesive strength between the first aggregate and the asphalt can be reduced, and the second aggregate into the asphalt and mixing them in the first mixer at room temperature for less than 60 seconds; A process of discharging the mixed material from the first mixer and stacking it so that the moisture in the second aggregate can be removed by the heat of the first aggregate, and then adjusting the moisture content to less than 1%, and then putting it into a second mixer; A process of selectively adding at least one of additional asphalt, thermoplastic resin, primary process oil, adhesive, filler, and additionally added oil to the mixture of the second mixer and mixing it at room temperature; A process of discharging the asphalt mixture manufactured from the second mixer to manufacture a ton-bag asphalt concrete pavement, and transporting it to a site; and
A method for constructing an asphalt mixture by heating on-site, comprising the steps of loading the above-mentioned ton-bag asphalt concrete pavement into a mobile production facility including a heat mixer, heating it to 80 to 180°C, mixing it, and spreading and compacting it on the lower layer to form an upper layer.